Intent.java revision 649f99e8347984c1e031dae302830f4c9ebd3df4
1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.content;
18
19import org.xmlpull.v1.XmlPullParser;
20import org.xmlpull.v1.XmlPullParserException;
21
22import android.annotation.SdkConstant;
23import android.annotation.SdkConstant.SdkConstantType;
24import android.content.pm.ActivityInfo;
25import android.content.pm.PackageManager;
26import android.content.pm.ResolveInfo;
27import android.content.res.Resources;
28import android.content.res.TypedArray;
29import android.net.Uri;
30import android.os.Bundle;
31import android.os.IBinder;
32import android.os.Parcel;
33import android.os.Parcelable;
34import android.util.AttributeSet;
35import android.util.Log;
36import com.android.internal.util.XmlUtils;
37
38import java.io.IOException;
39import java.io.Serializable;
40import java.net.URISyntaxException;
41import java.util.ArrayList;
42import java.util.HashSet;
43import java.util.Iterator;
44import java.util.Set;
45
46/**
47 * An intent is an abstract description of an operation to be performed.  It
48 * can be used with {@link Context#startActivity(Intent) startActivity} to
49 * launch an {@link android.app.Activity},
50 * {@link android.content.Context#sendBroadcast(Intent) broadcastIntent} to
51 * send it to any interested {@link BroadcastReceiver BroadcastReceiver} components,
52 * and {@link android.content.Context#startService} or
53 * {@link android.content.Context#bindService} to communicate with a
54 * background {@link android.app.Service}.
55 *
56 * <p>An Intent provides a facility for performing late runtime binding between
57 * the code in different applications.  Its most significant use is in the
58 * launching of activities, where it can be thought of as the glue between
59 * activities. It is
60 * basically a passive data structure holding an abstract description of an
61 * action to be performed. The primary pieces of information in an intent
62 * are:</p>
63 *
64 * <ul>
65 *   <li> <p><b>action</b> -- The general action to be performed, such as
66 *     {@link #ACTION_VIEW}, {@link #ACTION_EDIT}, {@link #ACTION_MAIN},
67 *     etc.</p>
68 *   </li>
69 *   <li> <p><b>data</b> -- The data to operate on, such as a person record
70 *     in the contacts database, expressed as a {@link android.net.Uri}.</p>
71 *   </li>
72 * </ul>
73 *
74 *
75 * <p>Some examples of action/data pairs are:</p>
76 *
77 * <ul>
78 *   <li> <p><b>{@link #ACTION_VIEW} <i>content://contacts/1</i></b> -- Display
79 *     information about the person whose identifier is "1".</p>
80 *   </li>
81 *   <li> <p><b>{@link #ACTION_DIAL} <i>content://contacts/1</i></b> -- Display
82 *     the phone dialer with the person filled in.</p>
83 *   </li>
84 *   <li> <p><b>{@link #ACTION_VIEW} <i>tel:123</i></b> -- Display
85 *     the phone dialer with the given number filled in.  Note how the
86 *     VIEW action does what what is considered the most reasonable thing for
87 *     a particular URI.</p>
88 *   </li>
89 *   <li> <p><b>{@link #ACTION_DIAL} <i>tel:123</i></b> -- Display
90 *     the phone dialer with the given number filled in.</p>
91 *   </li>
92 *   <li> <p><b>{@link #ACTION_EDIT} <i>content://contacts/1</i></b> -- Edit
93 *     information about the person whose identifier is "1".</p>
94 *   </li>
95 *   <li> <p><b>{@link #ACTION_VIEW} <i>content://contacts/</i></b> -- Display
96 *     a list of people, which the user can browse through.  This example is a
97 *     typical top-level entry into the Contacts application, showing you the
98 *     list of people. Selecting a particular person to view would result in a
99 *     new intent { <b>{@link #ACTION_VIEW} <i>content://contacts/N</i></b> }
100 *     being used to start an activity to display that person.</p>
101 *   </li>
102 * </ul>
103 *
104 * <p>In addition to these primary attributes, there are a number of secondary
105 * attributes that you can also include with an intent:</p>
106 *
107 * <ul>
108 *     <li> <p><b>category</b> -- Gives additional information about the action
109 *         to execute.  For example, {@link #CATEGORY_LAUNCHER} means it should
110 *         appear in the Launcher as a top-level application, while
111 *         {@link #CATEGORY_ALTERNATIVE} means it should be included in a list
112 *         of alternative actions the user can perform on a piece of data.</p>
113 *     <li> <p><b>type</b> -- Specifies an explicit type (a MIME type) of the
114 *         intent data.  Normally the type is inferred from the data itself.
115 *         By setting this attribute, you disable that evaluation and force
116 *         an explicit type.</p>
117 *     <li> <p><b>component</b> -- Specifies an explicit name of a component
118 *         class to use for the intent.  Normally this is determined by looking
119 *         at the other information in the intent (the action, data/type, and
120 *         categories) and matching that with a component that can handle it.
121 *         If this attribute is set then none of the evaluation is performed,
122 *         and this component is used exactly as is.  By specifying this attribute,
123 *         all of the other Intent attributes become optional.</p>
124 *     <li> <p><b>extras</b> -- This is a {@link Bundle} of any additional information.
125 *         This can be used to provide extended information to the component.
126 *         For example, if we have a action to send an e-mail message, we could
127 *         also include extra pieces of data here to supply a subject, body,
128 *         etc.</p>
129 * </ul>
130 *
131 * <p>Here are some examples of other operations you can specify as intents
132 * using these additional parameters:</p>
133 *
134 * <ul>
135 *   <li> <p><b>{@link #ACTION_MAIN} with category {@link #CATEGORY_HOME}</b> --
136 *     Launch the home screen.</p>
137 *   </li>
138 *   <li> <p><b>{@link #ACTION_GET_CONTENT} with MIME type
139 *     <i>{@link android.provider.Contacts.Phones#CONTENT_URI
140 *     vnd.android.cursor.item/phone}</i></b>
141 *     -- Display the list of people's phone numbers, allowing the user to
142 *     browse through them and pick one and return it to the parent activity.</p>
143 *   </li>
144 *   <li> <p><b>{@link #ACTION_GET_CONTENT} with MIME type
145 *     <i>*{@literal /}*</i> and category {@link #CATEGORY_OPENABLE}</b>
146 *     -- Display all pickers for data that can be opened with
147 *     {@link ContentResolver#openInputStream(Uri) ContentResolver.openInputStream()},
148 *     allowing the user to pick one of them and then some data inside of it
149 *     and returning the resulting URI to the caller.  This can be used,
150 *     for example, in an e-mail application to allow the user to pick some
151 *     data to include as an attachment.</p>
152 *   </li>
153 * </ul>
154 *
155 * <p>There are a variety of standard Intent action and category constants
156 * defined in the Intent class, but applications can also define their own.
157 * These strings use java style scoping, to ensure they are unique -- for
158 * example, the standard {@link #ACTION_VIEW} is called
159 * "android.app.action.VIEW".</p>
160 *
161 * <p>Put together, the set of actions, data types, categories, and extra data
162 * defines a language for the system allowing for the expression of phrases
163 * such as "call john smith's cell".  As applications are added to the system,
164 * they can extend this language by adding new actions, types, and categories, or
165 * they can modify the behavior of existing phrases by supplying their own
166 * activities that handle them.</p>
167 *
168 * <a name="IntentResolution"></a>
169 * <h3>Intent Resolution</h3>
170 *
171 * <p>There are two primary forms of intents you will use.
172 *
173 * <ul>
174 *     <li> <p><b>Explicit Intents</b> have specified a component (via
175 *     {@link #setComponent} or {@link #setClass}), which provides the exact
176 *     class to be run.  Often these will not include any other information,
177 *     simply being a way for an application to launch various internal
178 *     activities it has as the user interacts with the application.
179 *
180 *     <li> <p><b>Implicit Intents</b> have not specified a component;
181 *     instead, they must include enough information for the system to
182 *     determine which of the available components is best to run for that
183 *     intent.
184 * </ul>
185 *
186 * <p>When using implicit intents, given such an arbitrary intent we need to
187 * know what to do with it. This is handled by the process of <em>Intent
188 * resolution</em>, which maps an Intent to an {@link android.app.Activity},
189 * {@link BroadcastReceiver}, or {@link android.app.Service} (or sometimes two or
190 * more activities/receivers) that can handle it.</p>
191 *
192 * <p>The intent resolution mechanism basically revolves around matching an
193 * Intent against all of the &lt;intent-filter&gt; descriptions in the
194 * installed application packages.  (Plus, in the case of broadcasts, any {@link BroadcastReceiver}
195 * objects explicitly registered with {@link Context#registerReceiver}.)  More
196 * details on this can be found in the documentation on the {@link
197 * IntentFilter} class.</p>
198 *
199 * <p>There are three pieces of information in the Intent that are used for
200 * resolution: the action, type, and category.  Using this information, a query
201 * is done on the {@link PackageManager} for a component that can handle the
202 * intent. The appropriate component is determined based on the intent
203 * information supplied in the <code>AndroidManifest.xml</code> file as
204 * follows:</p>
205 *
206 * <ul>
207 *     <li> <p>The <b>action</b>, if given, must be listed by the component as
208 *         one it handles.</p>
209 *     <li> <p>The <b>type</b> is retrieved from the Intent's data, if not
210 *         already supplied in the Intent.  Like the action, if a type is
211 *         included in the intent (either explicitly or implicitly in its
212 *         data), then this must be listed by the component as one it handles.</p>
213 *     <li> For data that is not a <code>content:</code> URI and where no explicit
214 *         type is included in the Intent, instead the <b>scheme</b> of the
215 *         intent data (such as <code>http:</code> or <code>mailto:</code>) is
216 *         considered. Again like the action, if we are matching a scheme it
217 *         must be listed by the component as one it can handle.
218 *     <li> <p>The <b>categories</b>, if supplied, must <em>all</em> be listed
219 *         by the activity as categories it handles.  That is, if you include
220 *         the categories {@link #CATEGORY_LAUNCHER} and
221 *         {@link #CATEGORY_ALTERNATIVE}, then you will only resolve to components
222 *         with an intent that lists <em>both</em> of those categories.
223 *         Activities will very often need to support the
224 *         {@link #CATEGORY_DEFAULT} so that they can be found by
225 *         {@link Context#startActivity Context.startActivity()}.</p>
226 * </ul>
227 *
228 * <p>For example, consider the Note Pad sample application that
229 * allows user to browse through a list of notes data and view details about
230 * individual items.  Text in italics indicate places were you would replace a
231 * name with one specific to your own package.</p>
232 *
233 * <pre> &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
234 *       package="<i>com.android.notepad</i>"&gt;
235 *     &lt;application android:icon="@drawable/app_notes"
236 *             android:label="@string/app_name"&gt;
237 *
238 *         &lt;provider class=".NotePadProvider"
239 *                 android:authorities="<i>com.google.provider.NotePad</i>" /&gt;
240 *
241 *         &lt;activity class=".NotesList" android:label="@string/title_notes_list"&gt;
242 *             &lt;intent-filter&gt;
243 *                 &lt;action android:name="android.intent.action.MAIN" /&gt;
244 *                 &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
245 *             &lt;/intent-filter&gt;
246 *             &lt;intent-filter&gt;
247 *                 &lt;action android:name="android.intent.action.VIEW" /&gt;
248 *                 &lt;action android:name="android.intent.action.EDIT" /&gt;
249 *                 &lt;action android:name="android.intent.action.PICK" /&gt;
250 *                 &lt;category android:name="android.intent.category.DEFAULT" /&gt;
251 *                 &lt;data android:mimeType="vnd.android.cursor.dir/<i>vnd.google.note</i>" /&gt;
252 *             &lt;/intent-filter&gt;
253 *             &lt;intent-filter&gt;
254 *                 &lt;action android:name="android.intent.action.GET_CONTENT" /&gt;
255 *                 &lt;category android:name="android.intent.category.DEFAULT" /&gt;
256 *                 &lt;data android:mimeType="vnd.android.cursor.item/<i>vnd.google.note</i>" /&gt;
257 *             &lt;/intent-filter&gt;
258 *         &lt;/activity&gt;
259 *
260 *         &lt;activity class=".NoteEditor" android:label="@string/title_note"&gt;
261 *             &lt;intent-filter android:label="@string/resolve_edit"&gt;
262 *                 &lt;action android:name="android.intent.action.VIEW" /&gt;
263 *                 &lt;action android:name="android.intent.action.EDIT" /&gt;
264 *                 &lt;category android:name="android.intent.category.DEFAULT" /&gt;
265 *                 &lt;data android:mimeType="vnd.android.cursor.item/<i>vnd.google.note</i>" /&gt;
266 *             &lt;/intent-filter&gt;
267 *
268 *             &lt;intent-filter&gt;
269 *                 &lt;action android:name="android.intent.action.INSERT" /&gt;
270 *                 &lt;category android:name="android.intent.category.DEFAULT" /&gt;
271 *                 &lt;data android:mimeType="vnd.android.cursor.dir/<i>vnd.google.note</i>" /&gt;
272 *             &lt;/intent-filter&gt;
273 *
274 *         &lt;/activity&gt;
275 *
276 *         &lt;activity class=".TitleEditor" android:label="@string/title_edit_title"
277 *                 android:theme="@android:style/Theme.Dialog"&gt;
278 *             &lt;intent-filter android:label="@string/resolve_title"&gt;
279 *                 &lt;action android:name="<i>com.android.notepad.action.EDIT_TITLE</i>" /&gt;
280 *                 &lt;category android:name="android.intent.category.DEFAULT" /&gt;
281 *                 &lt;category android:name="android.intent.category.ALTERNATIVE" /&gt;
282 *                 &lt;category android:name="android.intent.category.SELECTED_ALTERNATIVE" /&gt;
283 *                 &lt;data android:mimeType="vnd.android.cursor.item/<i>vnd.google.note</i>" /&gt;
284 *             &lt;/intent-filter&gt;
285 *         &lt;/activity&gt;
286 *
287 *     &lt;/application&gt;
288 * &lt;/manifest&gt;</pre>
289 *
290 * <p>The first activity,
291 * <code>com.android.notepad.NotesList</code>, serves as our main
292 * entry into the app.  It can do three things as described by its three intent
293 * templates:
294 * <ol>
295 * <li><pre>
296 * &lt;intent-filter&gt;
297 *     &lt;action android:name="{@link #ACTION_MAIN android.intent.action.MAIN}" /&gt;
298 *     &lt;category android:name="{@link #CATEGORY_LAUNCHER android.intent.category.LAUNCHER}" /&gt;
299 * &lt;/intent-filter&gt;</pre>
300 * <p>This provides a top-level entry into the NotePad application: the standard
301 * MAIN action is a main entry point (not requiring any other information in
302 * the Intent), and the LAUNCHER category says that this entry point should be
303 * listed in the application launcher.</p>
304 * <li><pre>
305 * &lt;intent-filter&gt;
306 *     &lt;action android:name="{@link #ACTION_VIEW android.intent.action.VIEW}" /&gt;
307 *     &lt;action android:name="{@link #ACTION_EDIT android.intent.action.EDIT}" /&gt;
308 *     &lt;action android:name="{@link #ACTION_PICK android.intent.action.PICK}" /&gt;
309 *     &lt;category android:name="{@link #CATEGORY_DEFAULT android.intent.category.DEFAULT}" /&gt;
310 *     &lt;data mimeType:name="vnd.android.cursor.dir/<i>vnd.google.note</i>" /&gt;
311 * &lt;/intent-filter&gt;</pre>
312 * <p>This declares the things that the activity can do on a directory of
313 * notes.  The type being supported is given with the &lt;type&gt; tag, where
314 * <code>vnd.android.cursor.dir/vnd.google.note</code> is a URI from which
315 * a Cursor of zero or more items (<code>vnd.android.cursor.dir</code>) can
316 * be retrieved which holds our note pad data (<code>vnd.google.note</code>).
317 * The activity allows the user to view or edit the directory of data (via
318 * the VIEW and EDIT actions), or to pick a particular note and return it
319 * to the caller (via the PICK action).  Note also the DEFAULT category
320 * supplied here: this is <em>required</em> for the
321 * {@link Context#startActivity Context.startActivity} method to resolve your
322 * activity when its component name is not explicitly specified.</p>
323 * <li><pre>
324 * &lt;intent-filter&gt;
325 *     &lt;action android:name="{@link #ACTION_GET_CONTENT android.intent.action.GET_CONTENT}" /&gt;
326 *     &lt;category android:name="{@link #CATEGORY_DEFAULT android.intent.category.DEFAULT}" /&gt;
327 *     &lt;data android:mimeType="vnd.android.cursor.item/<i>vnd.google.note</i>" /&gt;
328 * &lt;/intent-filter&gt;</pre>
329 * <p>This filter describes the ability return to the caller a note selected by
330 * the user without needing to know where it came from.  The data type
331 * <code>vnd.android.cursor.item/vnd.google.note</code> is a URI from which
332 * a Cursor of exactly one (<code>vnd.android.cursor.item</code>) item can
333 * be retrieved which contains our note pad data (<code>vnd.google.note</code>).
334 * The GET_CONTENT action is similar to the PICK action, where the activity
335 * will return to its caller a piece of data selected by the user.  Here,
336 * however, the caller specifies the type of data they desire instead of
337 * the type of data the user will be picking from.</p>
338 * </ol>
339 *
340 * <p>Given these capabilities, the following intents will resolve to the
341 * NotesList activity:</p>
342 *
343 * <ul>
344 *     <li> <p><b>{ action=android.app.action.MAIN }</b> matches all of the
345 *         activities that can be used as top-level entry points into an
346 *         application.</p>
347 *     <li> <p><b>{ action=android.app.action.MAIN,
348 *         category=android.app.category.LAUNCHER }</b> is the actual intent
349 *         used by the Launcher to populate its top-level list.</p>
350 *     <li> <p><b>{ action=android.app.action.VIEW
351 *          data=content://com.google.provider.NotePad/notes }</b>
352 *         displays a list of all the notes under
353 *         "content://com.google.provider.NotePad/notes", which
354 *         the user can browse through and see the details on.</p>
355 *     <li> <p><b>{ action=android.app.action.PICK
356 *          data=content://com.google.provider.NotePad/notes }</b>
357 *         provides a list of the notes under
358 *         "content://com.google.provider.NotePad/notes", from which
359 *         the user can pick a note whose data URL is returned back to the caller.</p>
360 *     <li> <p><b>{ action=android.app.action.GET_CONTENT
361 *          type=vnd.android.cursor.item/vnd.google.note }</b>
362 *         is similar to the pick action, but allows the caller to specify the
363 *         kind of data they want back so that the system can find the appropriate
364 *         activity to pick something of that data type.</p>
365 * </ul>
366 *
367 * <p>The second activity,
368 * <code>com.android.notepad.NoteEditor</code>, shows the user a single
369 * note entry and allows them to edit it.  It can do two things as described
370 * by its two intent templates:
371 * <ol>
372 * <li><pre>
373 * &lt;intent-filter android:label="@string/resolve_edit"&gt;
374 *     &lt;action android:name="{@link #ACTION_VIEW android.intent.action.VIEW}" /&gt;
375 *     &lt;action android:name="{@link #ACTION_EDIT android.intent.action.EDIT}" /&gt;
376 *     &lt;category android:name="{@link #CATEGORY_DEFAULT android.intent.category.DEFAULT}" /&gt;
377 *     &lt;data android:mimeType="vnd.android.cursor.item/<i>vnd.google.note</i>" /&gt;
378 * &lt;/intent-filter&gt;</pre>
379 * <p>The first, primary, purpose of this activity is to let the user interact
380 * with a single note, as decribed by the MIME type
381 * <code>vnd.android.cursor.item/vnd.google.note</code>.  The activity can
382 * either VIEW a note or allow the user to EDIT it.  Again we support the
383 * DEFAULT category to allow the activity to be launched without explicitly
384 * specifying its component.</p>
385 * <li><pre>
386 * &lt;intent-filter&gt;
387 *     &lt;action android:name="{@link #ACTION_INSERT android.intent.action.INSERT}" /&gt;
388 *     &lt;category android:name="{@link #CATEGORY_DEFAULT android.intent.category.DEFAULT}" /&gt;
389 *     &lt;data android:mimeType="vnd.android.cursor.dir/<i>vnd.google.note</i>" /&gt;
390 * &lt;/intent-filter&gt;</pre>
391 * <p>The secondary use of this activity is to insert a new note entry into
392 * an existing directory of notes.  This is used when the user creates a new
393 * note: the INSERT action is executed on the directory of notes, causing
394 * this activity to run and have the user create the new note data which
395 * it then adds to the content provider.</p>
396 * </ol>
397 *
398 * <p>Given these capabilities, the following intents will resolve to the
399 * NoteEditor activity:</p>
400 *
401 * <ul>
402 *     <li> <p><b>{ action=android.app.action.VIEW
403 *          data=content://com.google.provider.NotePad/notes/<var>{ID}</var> }</b>
404 *         shows the user the content of note <var>{ID}</var>.</p>
405 *     <li> <p><b>{ action=android.app.action.EDIT
406 *          data=content://com.google.provider.NotePad/notes/<var>{ID}</var> }</b>
407 *         allows the user to edit the content of note <var>{ID}</var>.</p>
408 *     <li> <p><b>{ action=android.app.action.INSERT
409 *          data=content://com.google.provider.NotePad/notes }</b>
410 *         creates a new, empty note in the notes list at
411 *         "content://com.google.provider.NotePad/notes"
412 *         and allows the user to edit it.  If they keep their changes, the URI
413 *         of the newly created note is returned to the caller.</p>
414 * </ul>
415 *
416 * <p>The last activity,
417 * <code>com.android.notepad.TitleEditor</code>, allows the user to
418 * edit the title of a note.  This could be implemented as a class that the
419 * application directly invokes (by explicitly setting its component in
420 * the Intent), but here we show a way you can publish alternative
421 * operations on existing data:</p>
422 *
423 * <pre>
424 * &lt;intent-filter android:label="@string/resolve_title"&gt;
425 *     &lt;action android:name="<i>com.android.notepad.action.EDIT_TITLE</i>" /&gt;
426 *     &lt;category android:name="{@link #CATEGORY_DEFAULT android.intent.category.DEFAULT}" /&gt;
427 *     &lt;category android:name="{@link #CATEGORY_ALTERNATIVE android.intent.category.ALTERNATIVE}" /&gt;
428 *     &lt;category android:name="{@link #CATEGORY_SELECTED_ALTERNATIVE android.intent.category.SELECTED_ALTERNATIVE}" /&gt;
429 *     &lt;data android:mimeType="vnd.android.cursor.item/<i>vnd.google.note</i>" /&gt;
430 * &lt;/intent-filter&gt;</pre>
431 *
432 * <p>In the single intent template here, we
433 * have created our own private action called
434 * <code>com.android.notepad.action.EDIT_TITLE</code> which means to
435 * edit the title of a note.  It must be invoked on a specific note
436 * (data type <code>vnd.android.cursor.item/vnd.google.note</code>) like the previous
437 * view and edit actions, but here displays and edits the title contained
438 * in the note data.
439 *
440 * <p>In addition to supporting the default category as usual, our title editor
441 * also supports two other standard categories: ALTERNATIVE and
442 * SELECTED_ALTERNATIVE.  Implementing
443 * these categories allows others to find the special action it provides
444 * without directly knowing about it, through the
445 * {@link android.content.pm.PackageManager#queryIntentActivityOptions} method, or
446 * more often to build dynamic menu items with
447 * {@link android.view.Menu#addIntentOptions}.  Note that in the intent
448 * template here was also supply an explicit name for the template
449 * (via <code>android:label="@string/resolve_title"</code>) to better control
450 * what the user sees when presented with this activity as an alternative
451 * action to the data they are viewing.
452 *
453 * <p>Given these capabilities, the following intent will resolve to the
454 * TitleEditor activity:</p>
455 *
456 * <ul>
457 *     <li> <p><b>{ action=com.android.notepad.action.EDIT_TITLE
458 *          data=content://com.google.provider.NotePad/notes/<var>{ID}</var> }</b>
459 *         displays and allows the user to edit the title associated
460 *         with note <var>{ID}</var>.</p>
461 * </ul>
462 *
463 * <h3>Standard Activity Actions</h3>
464 *
465 * <p>These are the current standard actions that Intent defines for launching
466 * activities (usually through {@link Context#startActivity}.  The most
467 * important, and by far most frequently used, are {@link #ACTION_MAIN} and
468 * {@link #ACTION_EDIT}.
469 *
470 * <ul>
471 *     <li> {@link #ACTION_MAIN}
472 *     <li> {@link #ACTION_VIEW}
473 *     <li> {@link #ACTION_ATTACH_DATA}
474 *     <li> {@link #ACTION_EDIT}
475 *     <li> {@link #ACTION_PICK}
476 *     <li> {@link #ACTION_CHOOSER}
477 *     <li> {@link #ACTION_GET_CONTENT}
478 *     <li> {@link #ACTION_DIAL}
479 *     <li> {@link #ACTION_CALL}
480 *     <li> {@link #ACTION_SEND}
481 *     <li> {@link #ACTION_SENDTO}
482 *     <li> {@link #ACTION_ANSWER}
483 *     <li> {@link #ACTION_INSERT}
484 *     <li> {@link #ACTION_DELETE}
485 *     <li> {@link #ACTION_RUN}
486 *     <li> {@link #ACTION_SYNC}
487 *     <li> {@link #ACTION_PICK_ACTIVITY}
488 *     <li> {@link #ACTION_SEARCH}
489 *     <li> {@link #ACTION_WEB_SEARCH}
490 *     <li> {@link #ACTION_FACTORY_TEST}
491 * </ul>
492 *
493 * <h3>Standard Broadcast Actions</h3>
494 *
495 * <p>These are the current standard actions that Intent defines for receiving
496 * broadcasts (usually through {@link Context#registerReceiver} or a
497 * &lt;receiver&gt; tag in a manifest).
498 *
499 * <ul>
500 *     <li> {@link #ACTION_TIME_TICK}
501 *     <li> {@link #ACTION_TIME_CHANGED}
502 *     <li> {@link #ACTION_TIMEZONE_CHANGED}
503 *     <li> {@link #ACTION_BOOT_COMPLETED}
504 *     <li> {@link #ACTION_PACKAGE_ADDED}
505 *     <li> {@link #ACTION_PACKAGE_CHANGED}
506 *     <li> {@link #ACTION_PACKAGE_REMOVED}
507 *     <li> {@link #ACTION_PACKAGE_RESTARTED}
508 *     <li> {@link #ACTION_PACKAGE_DATA_CLEARED}
509 *     <li> {@link #ACTION_UID_REMOVED}
510 *     <li> {@link #ACTION_BATTERY_CHANGED}
511 *     <li> {@link #ACTION_POWER_CONNECTED}
512 *     <li> {@link #ACTION_POWER_DISCONNECTED}
513 *     <li> {@link #ACTION_SHUTDOWN}
514 * </ul>
515 *
516 * <h3>Standard Categories</h3>
517 *
518 * <p>These are the current standard categories that can be used to further
519 * clarify an Intent via {@link #addCategory}.
520 *
521 * <ul>
522 *     <li> {@link #CATEGORY_DEFAULT}
523 *     <li> {@link #CATEGORY_BROWSABLE}
524 *     <li> {@link #CATEGORY_TAB}
525 *     <li> {@link #CATEGORY_ALTERNATIVE}
526 *     <li> {@link #CATEGORY_SELECTED_ALTERNATIVE}
527 *     <li> {@link #CATEGORY_LAUNCHER}
528 *     <li> {@link #CATEGORY_INFO}
529 *     <li> {@link #CATEGORY_HOME}
530 *     <li> {@link #CATEGORY_PREFERENCE}
531 *     <li> {@link #CATEGORY_TEST}
532 * </ul>
533 *
534 * <h3>Standard Extra Data</h3>
535 *
536 * <p>These are the current standard fields that can be used as extra data via
537 * {@link #putExtra}.
538 *
539 * <ul>
540 *     <li> {@link #EXTRA_TEMPLATE}
541 *     <li> {@link #EXTRA_INTENT}
542 *     <li> {@link #EXTRA_STREAM}
543 *     <li> {@link #EXTRA_TEXT}
544 * </ul>
545 *
546 * <h3>Flags</h3>
547 *
548 * <p>These are the possible flags that can be used in the Intent via
549 * {@link #setFlags} and {@link #addFlags}.  See {@link #setFlags} for a list
550 * of all possible flags.
551 */
552public class Intent implements Parcelable {
553    // ---------------------------------------------------------------------
554    // ---------------------------------------------------------------------
555    // Standard intent activity actions (see action variable).
556
557    /**
558     *  Activity Action: Start as a main entry point, does not expect to
559     *  receive data.
560     *  <p>Input: nothing
561     *  <p>Output: nothing
562     */
563    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
564    public static final String ACTION_MAIN = "android.intent.action.MAIN";
565
566    /**
567     * Activity Action: Display the data to the user.  This is the most common
568     * action performed on data -- it is the generic action you can use on
569     * a piece of data to get the most reasonable thing to occur.  For example,
570     * when used on a contacts entry it will view the entry; when used on a
571     * mailto: URI it will bring up a compose window filled with the information
572     * supplied by the URI; when used with a tel: URI it will invoke the
573     * dialer.
574     * <p>Input: {@link #getData} is URI from which to retrieve data.
575     * <p>Output: nothing.
576     */
577    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
578    public static final String ACTION_VIEW = "android.intent.action.VIEW";
579
580    /**
581     * A synonym for {@link #ACTION_VIEW}, the "standard" action that is
582     * performed on a piece of data.
583     */
584    public static final String ACTION_DEFAULT = ACTION_VIEW;
585
586    /**
587     * Used to indicate that some piece of data should be attached to some other
588     * place.  For example, image data could be attached to a contact.  It is up
589     * to the recipient to decide where the data should be attached; the intent
590     * does not specify the ultimate destination.
591     * <p>Input: {@link #getData} is URI of data to be attached.
592     * <p>Output: nothing.
593     */
594    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
595    public static final String ACTION_ATTACH_DATA = "android.intent.action.ATTACH_DATA";
596
597    /**
598     * Activity Action: Provide explicit editable access to the given data.
599     * <p>Input: {@link #getData} is URI of data to be edited.
600     * <p>Output: nothing.
601     */
602    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
603    public static final String ACTION_EDIT = "android.intent.action.EDIT";
604
605    /**
606     * Activity Action: Pick an existing item, or insert a new item, and then edit it.
607     * <p>Input: {@link #getType} is the desired MIME type of the item to create or edit.
608     * The extras can contain type specific data to pass through to the editing/creating
609     * activity.
610     * <p>Output: The URI of the item that was picked.  This must be a content:
611     * URI so that any receiver can access it.
612     */
613    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
614    public static final String ACTION_INSERT_OR_EDIT = "android.intent.action.INSERT_OR_EDIT";
615
616    /**
617     * Activity Action: Pick an item from the data, returning what was selected.
618     * <p>Input: {@link #getData} is URI containing a directory of data
619     * (vnd.android.cursor.dir/*) from which to pick an item.
620     * <p>Output: The URI of the item that was picked.
621     */
622    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
623    public static final String ACTION_PICK = "android.intent.action.PICK";
624
625    /**
626     * Activity Action: Creates a shortcut.
627     * <p>Input: Nothing.</p>
628     * <p>Output: An Intent representing the shortcut. The intent must contain three
629     * extras: SHORTCUT_INTENT (value: Intent), SHORTCUT_NAME (value: String),
630     * and SHORTCUT_ICON (value: Bitmap) or SHORTCUT_ICON_RESOURCE
631     * (value: ShortcutIconResource).</p>
632     *
633     * @see #EXTRA_SHORTCUT_INTENT
634     * @see #EXTRA_SHORTCUT_NAME
635     * @see #EXTRA_SHORTCUT_ICON
636     * @see #EXTRA_SHORTCUT_ICON_RESOURCE
637     * @see android.content.Intent.ShortcutIconResource
638     */
639    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
640    public static final String ACTION_CREATE_SHORTCUT = "android.intent.action.CREATE_SHORTCUT";
641
642    /**
643     * The name of the extra used to define the Intent of a shortcut.
644     *
645     * @see #ACTION_CREATE_SHORTCUT
646     */
647    public static final String EXTRA_SHORTCUT_INTENT = "android.intent.extra.shortcut.INTENT";
648    /**
649     * The name of the extra used to define the name of a shortcut.
650     *
651     * @see #ACTION_CREATE_SHORTCUT
652     */
653    public static final String EXTRA_SHORTCUT_NAME = "android.intent.extra.shortcut.NAME";
654    /**
655     * The name of the extra used to define the icon, as a Bitmap, of a shortcut.
656     *
657     * @see #ACTION_CREATE_SHORTCUT
658     */
659    public static final String EXTRA_SHORTCUT_ICON = "android.intent.extra.shortcut.ICON";
660    /**
661     * The name of the extra used to define the icon, as a ShortcutIconResource, of a shortcut.
662     *
663     * @see #ACTION_CREATE_SHORTCUT
664     * @see android.content.Intent.ShortcutIconResource
665     */
666    public static final String EXTRA_SHORTCUT_ICON_RESOURCE =
667            "android.intent.extra.shortcut.ICON_RESOURCE";
668
669    /**
670     * Represents a shortcut/live folder icon resource.
671     *
672     * @see Intent#ACTION_CREATE_SHORTCUT
673     * @see Intent#EXTRA_SHORTCUT_ICON_RESOURCE
674     * @see android.provider.LiveFolders#ACTION_CREATE_LIVE_FOLDER
675     * @see android.provider.LiveFolders#EXTRA_LIVE_FOLDER_ICON
676     */
677    public static class ShortcutIconResource implements Parcelable {
678        /**
679         * The package name of the application containing the icon.
680         */
681        public String packageName;
682
683        /**
684         * The resource name of the icon, including package, name and type.
685         */
686        public String resourceName;
687
688        /**
689         * Creates a new ShortcutIconResource for the specified context and resource
690         * identifier.
691         *
692         * @param context The context of the application.
693         * @param resourceId The resource idenfitier for the icon.
694         * @return A new ShortcutIconResource with the specified's context package name
695         *         and icon resource idenfitier.
696         */
697        public static ShortcutIconResource fromContext(Context context, int resourceId) {
698            ShortcutIconResource icon = new ShortcutIconResource();
699            icon.packageName = context.getPackageName();
700            icon.resourceName = context.getResources().getResourceName(resourceId);
701            return icon;
702        }
703
704        /**
705         * Used to read a ShortcutIconResource from a Parcel.
706         */
707        public static final Parcelable.Creator<ShortcutIconResource> CREATOR =
708            new Parcelable.Creator<ShortcutIconResource>() {
709
710                public ShortcutIconResource createFromParcel(Parcel source) {
711                    ShortcutIconResource icon = new ShortcutIconResource();
712                    icon.packageName = source.readString();
713                    icon.resourceName = source.readString();
714                    return icon;
715                }
716
717                public ShortcutIconResource[] newArray(int size) {
718                    return new ShortcutIconResource[size];
719                }
720            };
721
722        /**
723         * No special parcel contents.
724         */
725        public int describeContents() {
726            return 0;
727        }
728
729        public void writeToParcel(Parcel dest, int flags) {
730            dest.writeString(packageName);
731            dest.writeString(resourceName);
732        }
733
734        @Override
735        public String toString() {
736            return resourceName;
737        }
738    }
739
740    /**
741     * Activity Action: Display an activity chooser, allowing the user to pick
742     * what they want to before proceeding.  This can be used as an alternative
743     * to the standard activity picker that is displayed by the system when
744     * you try to start an activity with multiple possible matches, with these
745     * differences in behavior:
746     * <ul>
747     * <li>You can specify the title that will appear in the activity chooser.
748     * <li>The user does not have the option to make one of the matching
749     * activities a preferred activity, and all possible activities will
750     * always be shown even if one of them is currently marked as the
751     * preferred activity.
752     * </ul>
753     * <p>
754     * This action should be used when the user will naturally expect to
755     * select an activity in order to proceed.  An example if when not to use
756     * it is when the user clicks on a "mailto:" link.  They would naturally
757     * expect to go directly to their mail app, so startActivity() should be
758     * called directly: it will
759     * either launch the current preferred app, or put up a dialog allowing the
760     * user to pick an app to use and optionally marking that as preferred.
761     * <p>
762     * In contrast, if the user is selecting a menu item to send a picture
763     * they are viewing to someone else, there are many different things they
764     * may want to do at this point: send it through e-mail, upload it to a
765     * web service, etc.  In this case the CHOOSER action should be used, to
766     * always present to the user a list of the things they can do, with a
767     * nice title given by the caller such as "Send this photo with:".
768     * <p>
769     * As a convenience, an Intent of this form can be created with the
770     * {@link #createChooser} function.
771     * <p>Input: No data should be specified.  get*Extra must have
772     * a {@link #EXTRA_INTENT} field containing the Intent being executed,
773     * and can optionally have a {@link #EXTRA_TITLE} field containing the
774     * title text to display in the chooser.
775     * <p>Output: Depends on the protocol of {@link #EXTRA_INTENT}.
776     */
777    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
778    public static final String ACTION_CHOOSER = "android.intent.action.CHOOSER";
779
780    /**
781     * Convenience function for creating a {@link #ACTION_CHOOSER} Intent.
782     *
783     * @param target The Intent that the user will be selecting an activity
784     * to perform.
785     * @param title Optional title that will be displayed in the chooser.
786     * @return Return a new Intent object that you can hand to
787     * {@link Context#startActivity(Intent) Context.startActivity()} and
788     * related methods.
789     */
790    public static Intent createChooser(Intent target, CharSequence title) {
791        Intent intent = new Intent(ACTION_CHOOSER);
792        intent.putExtra(EXTRA_INTENT, target);
793        if (title != null) {
794            intent.putExtra(EXTRA_TITLE, title);
795        }
796        return intent;
797    }
798    /**
799     * Activity Action: Allow the user to select a particular kind of data and
800     * return it.  This is different than {@link #ACTION_PICK} in that here we
801     * just say what kind of data is desired, not a URI of existing data from
802     * which the user can pick.  A ACTION_GET_CONTENT could allow the user to
803     * create the data as it runs (for example taking a picture or recording a
804     * sound), let them browser over the web and download the desired data,
805     * etc.
806     * <p>
807     * There are two main ways to use this action: if you want an specific kind
808     * of data, such as a person contact, you set the MIME type to the kind of
809     * data you want and launch it with {@link Context#startActivity(Intent)}.
810     * The system will then launch the best application to select that kind
811     * of data for you.
812     * <p>
813     * You may also be interested in any of a set of types of content the user
814     * can pick.  For example, an e-mail application that wants to allow the
815     * user to add an attachment to an e-mail message can use this action to
816     * bring up a list of all of the types of content the user can attach.
817     * <p>
818     * In this case, you should wrap the GET_CONTENT intent with a chooser
819     * (through {@link #createChooser}), which will give the proper interface
820     * for the user to pick how to send your data and allow you to specify
821     * a prompt indicating what they are doing.  You will usually specify a
822     * broad MIME type (such as image/* or {@literal *}/*), resulting in a
823     * broad range of content types the user can select from.
824     * <p>
825     * When using such a broad GET_CONTENT action, it is often desireable to
826     * only pick from data that can be represented as a stream.  This is
827     * accomplished by requiring the {@link #CATEGORY_OPENABLE} in the Intent.
828     * <p>
829     * Input: {@link #getType} is the desired MIME type to retrieve.  Note
830     * that no URI is supplied in the intent, as there are no constraints on
831     * where the returned data originally comes from.  You may also include the
832     * {@link #CATEGORY_OPENABLE} if you can only accept data that can be
833     * opened as a stream.
834     * <p>
835     * Output: The URI of the item that was picked.  This must be a content:
836     * URI so that any receiver can access it.
837     */
838    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
839    public static final String ACTION_GET_CONTENT = "android.intent.action.GET_CONTENT";
840    /**
841     * Activity Action: Dial a number as specified by the data.  This shows a
842     * UI with the number being dialed, allowing the user to explicitly
843     * initiate the call.
844     * <p>Input: If nothing, an empty dialer is started; else {@link #getData}
845     * is URI of a phone number to be dialed or a tel: URI of an explicit phone
846     * number.
847     * <p>Output: nothing.
848     */
849    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
850    public static final String ACTION_DIAL = "android.intent.action.DIAL";
851    /**
852     * Activity Action: Perform a call to someone specified by the data.
853     * <p>Input: If nothing, an empty dialer is started; else {@link #getData}
854     * is URI of a phone number to be dialed or a tel: URI of an explicit phone
855     * number.
856     * <p>Output: nothing.
857     *
858     * <p>Note: there will be restrictions on which applications can initiate a
859     * call; most applications should use the {@link #ACTION_DIAL}.
860     * <p>Note: this Intent <strong>cannot</strong> be used to call emergency
861     * numbers.  Applications can <strong>dial</strong> emergency numbers using
862     * {@link #ACTION_DIAL}, however.
863     */
864    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
865    public static final String ACTION_CALL = "android.intent.action.CALL";
866    /**
867     * Activity Action: Perform a call to an emergency number specified by the
868     * data.
869     * <p>Input: {@link #getData} is URI of a phone number to be dialed or a
870     * tel: URI of an explicit phone number.
871     * <p>Output: nothing.
872     * @hide
873     */
874    public static final String ACTION_CALL_EMERGENCY = "android.intent.action.CALL_EMERGENCY";
875    /**
876     * Activity action: Perform a call to any number (emergency or not)
877     * specified by the data.
878     * <p>Input: {@link #getData} is URI of a phone number to be dialed or a
879     * tel: URI of an explicit phone number.
880     * <p>Output: nothing.
881     * @hide
882     */
883    public static final String ACTION_CALL_PRIVILEGED = "android.intent.action.CALL_PRIVILEGED";
884    /**
885     * Activity Action: Send a message to someone specified by the data.
886     * <p>Input: {@link #getData} is URI describing the target.
887     * <p>Output: nothing.
888     */
889    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
890    public static final String ACTION_SENDTO = "android.intent.action.SENDTO";
891    /**
892     * Activity Action: Deliver some data to someone else.  Who the data is
893     * being delivered to is not specified; it is up to the receiver of this
894     * action to ask the user where the data should be sent.
895     * <p>
896     * When launching a SEND intent, you should usually wrap it in a chooser
897     * (through {@link #createChooser}), which will give the proper interface
898     * for the user to pick how to send your data and allow you to specify
899     * a prompt indicating what they are doing.
900     * <p>
901     * Input: {@link #getType} is the MIME type of the data being sent.
902     * get*Extra can have either a {@link #EXTRA_TEXT}
903     * or {@link #EXTRA_STREAM} field, containing the data to be sent.  If
904     * using EXTRA_TEXT, the MIME type should be "text/plain"; otherwise it
905     * should be the MIME type of the data in EXTRA_STREAM.  Use {@literal *}/*
906     * if the MIME type is unknown (this will only allow senders that can
907     * handle generic data streams).
908     * <p>
909     * Optional standard extras, which may be interpreted by some recipients as
910     * appropriate, are: {@link #EXTRA_EMAIL}, {@link #EXTRA_CC},
911     * {@link #EXTRA_BCC}, {@link #EXTRA_SUBJECT}.
912     * <p>
913     * Output: nothing.
914     */
915    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
916    public static final String ACTION_SEND = "android.intent.action.SEND";
917    /**
918     * Activity Action: Deliver multiple data to someone else.
919     * <p>
920     * Like ACTION_SEND, except the data is multiple.
921     * <p>
922     * Input: {@link #getType} is the MIME type of the data being sent.
923     * get*ArrayListExtra can have either a {@link #EXTRA_TEXT} or {@link
924     * #EXTRA_STREAM} field, containing the data to be sent.
925     * <p>
926     * Optional standard extras, which may be interpreted by some recipients as
927     * appropriate, are: {@link #EXTRA_EMAIL}, {@link #EXTRA_CC},
928     * {@link #EXTRA_BCC}, {@link #EXTRA_SUBJECT}.
929     * <p>
930     * Output: nothing.
931     */
932    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
933    public static final String ACTION_SEND_MULTIPLE = "android.intent.action.SEND_MULTIPLE";
934    /**
935     * Activity Action: Handle an incoming phone call.
936     * <p>Input: nothing.
937     * <p>Output: nothing.
938     */
939    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
940    public static final String ACTION_ANSWER = "android.intent.action.ANSWER";
941    /**
942     * Activity Action: Insert an empty item into the given container.
943     * <p>Input: {@link #getData} is URI of the directory (vnd.android.cursor.dir/*)
944     * in which to place the data.
945     * <p>Output: URI of the new data that was created.
946     */
947    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
948    public static final String ACTION_INSERT = "android.intent.action.INSERT";
949    /**
950     * Activity Action: Delete the given data from its container.
951     * <p>Input: {@link #getData} is URI of data to be deleted.
952     * <p>Output: nothing.
953     */
954    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
955    public static final String ACTION_DELETE = "android.intent.action.DELETE";
956    /**
957     * Activity Action: Run the data, whatever that means.
958     * <p>Input: ?  (Note: this is currently specific to the test harness.)
959     * <p>Output: nothing.
960     */
961    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
962    public static final String ACTION_RUN = "android.intent.action.RUN";
963    /**
964     * Activity Action: Perform a data synchronization.
965     * <p>Input: ?
966     * <p>Output: ?
967     */
968    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
969    public static final String ACTION_SYNC = "android.intent.action.SYNC";
970    /**
971     * Activity Action: Pick an activity given an intent, returning the class
972     * selected.
973     * <p>Input: get*Extra field {@link #EXTRA_INTENT} is an Intent
974     * used with {@link PackageManager#queryIntentActivities} to determine the
975     * set of activities from which to pick.
976     * <p>Output: Class name of the activity that was selected.
977     */
978    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
979    public static final String ACTION_PICK_ACTIVITY = "android.intent.action.PICK_ACTIVITY";
980    /**
981     * Activity Action: Perform a search.
982     * <p>Input: {@link android.app.SearchManager#QUERY getStringExtra(SearchManager.QUERY)}
983     * is the text to search for.  If empty, simply
984     * enter your search results Activity with the search UI activated.
985     * <p>Output: nothing.
986     */
987    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
988    public static final String ACTION_SEARCH = "android.intent.action.SEARCH";
989    /**
990     * Activity Action: Start the platform-defined tutorial
991     * <p>Input: {@link android.app.SearchManager#QUERY getStringExtra(SearchManager.QUERY)}
992     * is the text to search for.  If empty, simply
993     * enter your search results Activity with the search UI activated.
994     * <p>Output: nothing.
995     */
996    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
997    public static final String ACTION_SYSTEM_TUTORIAL = "android.intent.action.SYSTEM_TUTORIAL";
998    /**
999     * Activity Action: Perform a web search.
1000     * <p>
1001     * Input: {@link android.app.SearchManager#QUERY
1002     * getStringExtra(SearchManager.QUERY)} is the text to search for. If it is
1003     * a url starts with http or https, the site will be opened. If it is plain
1004     * text, Google search will be applied.
1005     * <p>
1006     * Output: nothing.
1007     */
1008    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1009    public static final String ACTION_WEB_SEARCH = "android.intent.action.WEB_SEARCH";
1010    /**
1011     * Activity Action: List all available applications
1012     * <p>Input: Nothing.
1013     * <p>Output: nothing.
1014     */
1015    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1016    public static final String ACTION_ALL_APPS = "android.intent.action.ALL_APPS";
1017    /**
1018     * Activity Action: Show settings for choosing wallpaper
1019     * <p>Input: Nothing.
1020     * <p>Output: Nothing.
1021     */
1022    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1023    public static final String ACTION_SET_WALLPAPER = "android.intent.action.SET_WALLPAPER";
1024
1025    /**
1026     * Activity Action: Show activity for reporting a bug.
1027     * <p>Input: Nothing.
1028     * <p>Output: Nothing.
1029     */
1030    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1031    public static final String ACTION_BUG_REPORT = "android.intent.action.BUG_REPORT";
1032
1033    /**
1034     *  Activity Action: Main entry point for factory tests.  Only used when
1035     *  the device is booting in factory test node.  The implementing package
1036     *  must be installed in the system image.
1037     *  <p>Input: nothing
1038     *  <p>Output: nothing
1039     */
1040    public static final String ACTION_FACTORY_TEST = "android.intent.action.FACTORY_TEST";
1041
1042    /**
1043     * Activity Action: The user pressed the "call" button to go to the dialer
1044     * or other appropriate UI for placing a call.
1045     * <p>Input: Nothing.
1046     * <p>Output: Nothing.
1047     */
1048    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1049    public static final String ACTION_CALL_BUTTON = "android.intent.action.CALL_BUTTON";
1050
1051    /**
1052     * Activity Action: Start Voice Command.
1053     * <p>Input: Nothing.
1054     * <p>Output: Nothing.
1055     */
1056    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1057    public static final String ACTION_VOICE_COMMAND = "android.intent.action.VOICE_COMMAND";
1058
1059    /**
1060     * Activity Action: Start action associated with long pressing on the
1061     * search key.
1062     * <p>Input: Nothing.
1063     * <p>Output: Nothing.
1064     */
1065    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1066    public static final String ACTION_SEARCH_LONG_PRESS = "android.intent.action.SEARCH_LONG_PRESS";
1067
1068    /**
1069     * Activity Action: The user pressed the "Report" button in the crash/ANR dialog.
1070     * This intent is delivered to the package which installed the application, usually
1071     * the Market.
1072     * <p>Input: No data is specified. The bug report is passed in using
1073     * an {@link #EXTRA_BUG_REPORT} field.
1074     * <p>Output: Nothing.
1075     * @hide
1076     */
1077    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
1078    public static final String ACTION_APP_ERROR = "android.intent.action.APP_ERROR";
1079    // ---------------------------------------------------------------------
1080    // ---------------------------------------------------------------------
1081    // Standard intent broadcast actions (see action variable).
1082
1083    /**
1084     * Broadcast Action: Sent after the screen turns off.
1085     */
1086    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1087    public static final String ACTION_SCREEN_OFF = "android.intent.action.SCREEN_OFF";
1088    /**
1089     * Broadcast Action: Sent after the screen turns on.
1090     */
1091    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1092    public static final String ACTION_SCREEN_ON = "android.intent.action.SCREEN_ON";
1093
1094    /**
1095     * Broadcast Action: Sent when the user is present after device wakes up (e.g when the
1096     * keyguard is gone).
1097     */
1098    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1099    public static final String ACTION_USER_PRESENT= "android.intent.action.USER_PRESENT";
1100
1101    /**
1102     * Broadcast Action: The current time has changed.  Sent every
1103     * minute.  You can <em>not</em> receive this through components declared
1104     * in manifests, only by exlicitly registering for it with
1105     * {@link Context#registerReceiver(BroadcastReceiver, IntentFilter)
1106     * Context.registerReceiver()}.
1107     */
1108    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1109    public static final String ACTION_TIME_TICK = "android.intent.action.TIME_TICK";
1110    /**
1111     * Broadcast Action: The time was set.
1112     */
1113    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1114    public static final String ACTION_TIME_CHANGED = "android.intent.action.TIME_SET";
1115    /**
1116     * Broadcast Action: The date has changed.
1117     */
1118    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1119    public static final String ACTION_DATE_CHANGED = "android.intent.action.DATE_CHANGED";
1120    /**
1121     * Broadcast Action: The timezone has changed. The intent will have the following extra values:</p>
1122     * <ul>
1123     *   <li><em>time-zone</em> - The java.util.TimeZone.getID() value identifying the new time zone.</li>
1124     * </ul>
1125     */
1126    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1127    public static final String ACTION_TIMEZONE_CHANGED = "android.intent.action.TIMEZONE_CHANGED";
1128    /**
1129     * Alarm Changed Action: This is broadcast when the AlarmClock
1130     * application's alarm is set or unset.  It is used by the
1131     * AlarmClock application and the StatusBar service.
1132     * @hide
1133     */
1134    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1135    public static final String ACTION_ALARM_CHANGED = "android.intent.action.ALARM_CHANGED";
1136    /**
1137     * Sync State Changed Action: This is broadcast when the sync starts or stops or when one has
1138     * been failing for a long time.  It is used by the SyncManager and the StatusBar service.
1139     * @hide
1140     */
1141    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1142    public static final String ACTION_SYNC_STATE_CHANGED
1143            = "android.intent.action.SYNC_STATE_CHANGED";
1144    /**
1145     * Broadcast Action: This is broadcast once, after the system has finished
1146     * booting.  It can be used to perform application-specific initialization,
1147     * such as installing alarms.  You must hold the
1148     * {@link android.Manifest.permission#RECEIVE_BOOT_COMPLETED} permission
1149     * in order to receive this broadcast.
1150     */
1151    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1152    public static final String ACTION_BOOT_COMPLETED = "android.intent.action.BOOT_COMPLETED";
1153    /**
1154     * Broadcast Action: This is broadcast when a user action should request a
1155     * temporary system dialog to dismiss.  Some examples of temporary system
1156     * dialogs are the notification window-shade and the recent tasks dialog.
1157     */
1158    public static final String ACTION_CLOSE_SYSTEM_DIALOGS = "android.intent.action.CLOSE_SYSTEM_DIALOGS";
1159    /**
1160     * Broadcast Action: Trigger the download and eventual installation
1161     * of a package.
1162     * <p>Input: {@link #getData} is the URI of the package file to download.
1163     */
1164    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1165    public static final String ACTION_PACKAGE_INSTALL = "android.intent.action.PACKAGE_INSTALL";
1166    /**
1167     * Broadcast Action: A new application package has been installed on the
1168     * device. The data contains the name of the package.  Note that the
1169     * newly installed package does <em>not</em> receive this broadcast.
1170     * <p>My include the following extras:
1171     * <ul>
1172     * <li> {@link #EXTRA_UID} containing the integer uid assigned to the new package.
1173     * <li> {@link #EXTRA_REPLACING} is set to true if this is following
1174     * an {@link #ACTION_PACKAGE_REMOVED} broadcast for the same package.
1175     * </ul>
1176     */
1177    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1178    public static final String ACTION_PACKAGE_ADDED = "android.intent.action.PACKAGE_ADDED";
1179    /**
1180     * Broadcast Action: A new version of an application package has been
1181     * installed, replacing an existing version that was previously installed.
1182     * The data contains the name of the package.
1183     * <p>My include the following extras:
1184     * <ul>
1185     * <li> {@link #EXTRA_UID} containing the integer uid assigned to the new package.
1186     * </ul>
1187     */
1188    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1189    public static final String ACTION_PACKAGE_REPLACED = "android.intent.action.PACKAGE_REPLACED";
1190    /**
1191     * Broadcast Action: An existing application package has been removed from
1192     * the device.  The data contains the name of the package.  The package
1193     * that is being installed does <em>not</em> receive this Intent.
1194     * <ul>
1195     * <li> {@link #EXTRA_UID} containing the integer uid previously assigned
1196     * to the package.
1197     * <li> {@link #EXTRA_DATA_REMOVED} is set to true if the entire
1198     * application -- data and code -- is being removed.
1199     * <li> {@link #EXTRA_REPLACING} is set to true if this will be followed
1200     * by an {@link #ACTION_PACKAGE_ADDED} broadcast for the same package.
1201     * </ul>
1202     */
1203    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1204    public static final String ACTION_PACKAGE_REMOVED = "android.intent.action.PACKAGE_REMOVED";
1205    /**
1206     * Broadcast Action: An existing application package has been changed (e.g. a component has been
1207     * enabled or disabled.  The data contains the name of the package.
1208     * <ul>
1209     * <li> {@link #EXTRA_UID} containing the integer uid assigned to the package.
1210     * </ul>
1211     */
1212    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1213    public static final String ACTION_PACKAGE_CHANGED = "android.intent.action.PACKAGE_CHANGED";
1214    /**
1215     * Broadcast Action: The user has restarted a package, and all of its
1216     * processes have been killed.  All runtime state
1217     * associated with it (processes, alarms, notifications, etc) should
1218     * be removed.  Note that the restarted package does <em>not</em>
1219     * receive this broadcast.
1220     * The data contains the name of the package.
1221     * <ul>
1222     * <li> {@link #EXTRA_UID} containing the integer uid assigned to the package.
1223     * </ul>
1224     */
1225    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1226    public static final String ACTION_PACKAGE_RESTARTED = "android.intent.action.PACKAGE_RESTARTED";
1227    /**
1228     * Broadcast Action: The user has cleared the data of a package.  This should
1229     * be preceded by {@link #ACTION_PACKAGE_RESTARTED}, after which all of
1230     * its persistent data is erased and this broadcast sent.
1231     * Note that the cleared package does <em>not</em>
1232     * receive this broadcast. The data contains the name of the package.
1233     * <ul>
1234     * <li> {@link #EXTRA_UID} containing the integer uid assigned to the package.
1235     * </ul>
1236     */
1237    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1238    public static final String ACTION_PACKAGE_DATA_CLEARED = "android.intent.action.PACKAGE_DATA_CLEARED";
1239    /**
1240     * Broadcast Action: A user ID has been removed from the system.  The user
1241     * ID number is stored in the extra data under {@link #EXTRA_UID}.
1242     */
1243    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1244    public static final String ACTION_UID_REMOVED = "android.intent.action.UID_REMOVED";
1245    /**
1246     * Broadcast Action:  The current system wallpaper has changed.  See
1247     * {@link Context#getWallpaper} for retrieving the new wallpaper.
1248     */
1249    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1250    public static final String ACTION_WALLPAPER_CHANGED = "android.intent.action.WALLPAPER_CHANGED";
1251    /**
1252     * Broadcast Action: The current device {@link android.content.res.Configuration}
1253     * (orientation, locale, etc) has changed.  When such a change happens, the
1254     * UIs (view hierarchy) will need to be rebuilt based on this new
1255     * information; for the most part, applications don't need to worry about
1256     * this, because the system will take care of stopping and restarting the
1257     * application to make sure it sees the new changes.  Some system code that
1258     * can not be restarted will need to watch for this action and handle it
1259     * appropriately.
1260     *
1261     * @see android.content.res.Configuration
1262     */
1263    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1264    public static final String ACTION_CONFIGURATION_CHANGED = "android.intent.action.CONFIGURATION_CHANGED";
1265    /**
1266     * Broadcast Action:  The charging state, or charge level of the battery has
1267     * changed.
1268     *
1269     * <p class="note">
1270     * You can <em>not</em> receive this through components declared
1271     * in manifests, only by exlicitly registering for it with
1272     * {@link Context#registerReceiver(BroadcastReceiver, IntentFilter)
1273     * Context.registerReceiver()}.
1274     */
1275    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1276    public static final String ACTION_BATTERY_CHANGED = "android.intent.action.BATTERY_CHANGED";
1277    /**
1278     * Broadcast Action:  Indicates low battery condition on the device.
1279     * This broadcast corresponds to the "Low battery warning" system dialog.
1280     */
1281    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1282    public static final String ACTION_BATTERY_LOW = "android.intent.action.BATTERY_LOW";
1283    /**
1284     * Broadcast Action:  External power has been connected to the device.
1285     * This is intended for applications that wish to register specifically to this notification.
1286     * Unlike ACTION_BATTERY_CHANGED, applications will be woken for this and so do not have to
1287     * stay active to receive this notification.  This action can be used to implement actions
1288     * that wait until power is available to trigger.
1289     */
1290    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1291    public static final String ACTION_POWER_CONNECTED = "android.intent.action.ACTION_POWER_CONNECTED";
1292    /**
1293     * Broadcast Action:  External power has been removed from the device.
1294     * This is intended for applications that wish to register specifically to this notification.
1295     * Unlike ACTION_BATTERY_CHANGED, applications will be woken for this and so do not have to
1296     * stay active to receive this notification.  This action can be used to implement actions
1297     * that wait until power is available to trigger.
1298     */
1299    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1300    public static final String ACTION_POWER_DISCONNECTED = "android.intent.action.ACTION_POWER_DISCONNECTED";
1301    /**
1302     * Broadcast Action:  Device is shutting down.
1303     * This is broadcast when the device is being shut down (completely turned
1304     * off, not sleeping).  Once the broadcast is complete, the final shutdown
1305     * will proceed and all unsaved data lost.  Apps will not normally need
1306     * to handle this, since the forground activity will be paused as well.
1307     */
1308    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1309    public static final String ACTION_SHUTDOWN = "android.intent.action.ACTION_SHUTDOWN";
1310    /**
1311     * Broadcast Action:  Indicates low memory condition on the device
1312     */
1313    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1314    public static final String ACTION_DEVICE_STORAGE_LOW = "android.intent.action.DEVICE_STORAGE_LOW";
1315    /**
1316     * Broadcast Action:  Indicates low memory condition on the device no longer exists
1317     */
1318    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1319    public static final String ACTION_DEVICE_STORAGE_OK = "android.intent.action.DEVICE_STORAGE_OK";
1320    /**
1321     * Broadcast Action:  Indicates low memory condition notification acknowledged by user
1322     * and package management should be started.
1323     * This is triggered by the user from the ACTION_DEVICE_STORAGE_LOW
1324     * notification.
1325     */
1326    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1327    public static final String ACTION_MANAGE_PACKAGE_STORAGE = "android.intent.action.MANAGE_PACKAGE_STORAGE";
1328    /**
1329     * Broadcast Action:  The device has entered USB Mass Storage mode.
1330     * This is used mainly for the USB Settings panel.
1331     * Apps should listen for ACTION_MEDIA_MOUNTED and ACTION_MEDIA_UNMOUNTED broadcasts to be notified
1332     * when the SD card file system is mounted or unmounted
1333     */
1334    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1335    public static final String ACTION_UMS_CONNECTED = "android.intent.action.UMS_CONNECTED";
1336
1337    /**
1338     * Broadcast Action:  The device has exited USB Mass Storage mode.
1339     * This is used mainly for the USB Settings panel.
1340     * Apps should listen for ACTION_MEDIA_MOUNTED and ACTION_MEDIA_UNMOUNTED broadcasts to be notified
1341     * when the SD card file system is mounted or unmounted
1342     */
1343    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1344    public static final String ACTION_UMS_DISCONNECTED = "android.intent.action.UMS_DISCONNECTED";
1345
1346    /**
1347     * Broadcast Action:  External media has been removed.
1348     * The path to the mount point for the removed media is contained in the Intent.mData field.
1349     */
1350    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1351    public static final String ACTION_MEDIA_REMOVED = "android.intent.action.MEDIA_REMOVED";
1352
1353    /**
1354     * Broadcast Action:  External media is present, but not mounted at its mount point.
1355     * The path to the mount point for the removed media is contained in the Intent.mData field.
1356     */
1357    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1358    public static final String ACTION_MEDIA_UNMOUNTED = "android.intent.action.MEDIA_UNMOUNTED";
1359
1360    /**
1361     * Broadcast Action:  External media is present, and being disk-checked
1362     * The path to the mount point for the checking media is contained in the Intent.mData field.
1363     */
1364    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1365    public static final String ACTION_MEDIA_CHECKING = "android.intent.action.MEDIA_CHECKING";
1366
1367    /**
1368     * Broadcast Action:  External media is present, but is using an incompatible fs (or is blank)
1369     * The path to the mount point for the checking media is contained in the Intent.mData field.
1370     */
1371    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1372    public static final String ACTION_MEDIA_NOFS = "android.intent.action.MEDIA_NOFS";
1373
1374    /**
1375     * Broadcast Action:  External media is present and mounted at its mount point.
1376     * The path to the mount point for the removed media is contained in the Intent.mData field.
1377     * The Intent contains an extra with name "read-only" and Boolean value to indicate if the
1378     * media was mounted read only.
1379     */
1380    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1381    public static final String ACTION_MEDIA_MOUNTED = "android.intent.action.MEDIA_MOUNTED";
1382
1383    /**
1384     * Broadcast Action:  External media is unmounted because it is being shared via USB mass storage.
1385     * The path to the mount point for the removed media is contained in the Intent.mData field.
1386     */
1387    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1388    public static final String ACTION_MEDIA_SHARED = "android.intent.action.MEDIA_SHARED";
1389
1390    /**
1391     * Broadcast Action:  External media was removed from SD card slot, but mount point was not unmounted.
1392     * The path to the mount point for the removed media is contained in the Intent.mData field.
1393     */
1394    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1395    public static final String ACTION_MEDIA_BAD_REMOVAL = "android.intent.action.MEDIA_BAD_REMOVAL";
1396
1397    /**
1398     * Broadcast Action:  External media is present but cannot be mounted.
1399     * The path to the mount point for the removed media is contained in the Intent.mData field.
1400     */
1401    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1402    public static final String ACTION_MEDIA_UNMOUNTABLE = "android.intent.action.MEDIA_UNMOUNTABLE";
1403
1404   /**
1405     * Broadcast Action:  User has expressed the desire to remove the external storage media.
1406     * Applications should close all files they have open within the mount point when they receive this intent.
1407     * The path to the mount point for the media to be ejected is contained in the Intent.mData field.
1408     */
1409    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1410    public static final String ACTION_MEDIA_EJECT = "android.intent.action.MEDIA_EJECT";
1411
1412    /**
1413     * Broadcast Action:  The media scanner has started scanning a directory.
1414     * The path to the directory being scanned is contained in the Intent.mData field.
1415     */
1416    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1417    public static final String ACTION_MEDIA_SCANNER_STARTED = "android.intent.action.MEDIA_SCANNER_STARTED";
1418
1419   /**
1420     * Broadcast Action:  The media scanner has finished scanning a directory.
1421     * The path to the scanned directory is contained in the Intent.mData field.
1422     */
1423    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1424    public static final String ACTION_MEDIA_SCANNER_FINISHED = "android.intent.action.MEDIA_SCANNER_FINISHED";
1425
1426   /**
1427     * Broadcast Action:  Request the media scanner to scan a file and add it to the media database.
1428     * The path to the file is contained in the Intent.mData field.
1429     */
1430    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1431    public static final String ACTION_MEDIA_SCANNER_SCAN_FILE = "android.intent.action.MEDIA_SCANNER_SCAN_FILE";
1432
1433   /**
1434     * Broadcast Action:  The "Media Button" was pressed.  Includes a single
1435     * extra field, {@link #EXTRA_KEY_EVENT}, containing the key event that
1436     * caused the broadcast.
1437     */
1438    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1439    public static final String ACTION_MEDIA_BUTTON = "android.intent.action.MEDIA_BUTTON";
1440
1441    /**
1442     * Broadcast Action:  The "Camera Button" was pressed.  Includes a single
1443     * extra field, {@link #EXTRA_KEY_EVENT}, containing the key event that
1444     * caused the broadcast.
1445     */
1446    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1447    public static final String ACTION_CAMERA_BUTTON = "android.intent.action.CAMERA_BUTTON";
1448
1449    // *** NOTE: @todo(*) The following really should go into a more domain-specific
1450    // location; they are not general-purpose actions.
1451
1452    /**
1453     * Broadcast Action: An GTalk connection has been established.
1454     */
1455    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1456    public static final String ACTION_GTALK_SERVICE_CONNECTED =
1457            "android.intent.action.GTALK_CONNECTED";
1458
1459    /**
1460     * Broadcast Action: An GTalk connection has been disconnected.
1461     */
1462    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1463    public static final String ACTION_GTALK_SERVICE_DISCONNECTED =
1464            "android.intent.action.GTALK_DISCONNECTED";
1465
1466    /**
1467     * Broadcast Action: An input method has been changed.
1468     */
1469    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1470    public static final String ACTION_INPUT_METHOD_CHANGED =
1471            "android.intent.action.INPUT_METHOD_CHANGED";
1472
1473    /**
1474     * <p>Broadcast Action: The user has switched the phone into or out of Airplane Mode. One or
1475     * more radios have been turned off or on. The intent will have the following extra value:</p>
1476     * <ul>
1477     *   <li><em>state</em> - A boolean value indicating whether Airplane Mode is on. If true,
1478     *   then cell radio and possibly other radios such as bluetooth or WiFi may have also been
1479     *   turned off</li>
1480     * </ul>
1481     */
1482    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1483    public static final String ACTION_AIRPLANE_MODE_CHANGED = "android.intent.action.AIRPLANE_MODE";
1484
1485    /**
1486     * Broadcast Action: Some content providers have parts of their namespace
1487     * where they publish new events or items that the user may be especially
1488     * interested in. For these things, they may broadcast this action when the
1489     * set of interesting items change.
1490     *
1491     * For example, GmailProvider sends this notification when the set of unread
1492     * mail in the inbox changes.
1493     *
1494     * <p>The data of the intent identifies which part of which provider
1495     * changed. When queried through the content resolver, the data URI will
1496     * return the data set in question.
1497     *
1498     * <p>The intent will have the following extra values:
1499     * <ul>
1500     *   <li><em>count</em> - The number of items in the data set. This is the
1501     *       same as the number of items in the cursor returned by querying the
1502     *       data URI. </li>
1503     * </ul>
1504     *
1505     * This intent will be sent at boot (if the count is non-zero) and when the
1506     * data set changes. It is possible for the data set to change without the
1507     * count changing (for example, if a new unread message arrives in the same
1508     * sync operation in which a message is archived). The phone should still
1509     * ring/vibrate/etc as normal in this case.
1510     */
1511    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1512    public static final String ACTION_PROVIDER_CHANGED =
1513            "android.intent.action.PROVIDER_CHANGED";
1514
1515    /**
1516     * Broadcast Action: Wired Headset plugged in or unplugged.
1517     *
1518     * <p>The intent will have the following extra values:
1519     * <ul>
1520     *   <li><em>state</em> - 0 for unplugged, 1 for plugged. </li>
1521     *   <li><em>name</em> - Headset type, human readable string </li>
1522     * </ul>
1523     * </ul>
1524     */
1525    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1526    public static final String ACTION_HEADSET_PLUG =
1527            "android.intent.action.HEADSET_PLUG";
1528
1529    /**
1530     * Broadcast Action: An outgoing call is about to be placed.
1531     *
1532     * <p>The Intent will have the following extra value:
1533     * <ul>
1534     *   <li><em>{@link android.content.Intent#EXTRA_PHONE_NUMBER}</em> -
1535     *       the phone number originally intended to be dialed.</li>
1536     * </ul>
1537     * <p>Once the broadcast is finished, the resultData is used as the actual
1538     * number to call.  If  <code>null</code>, no call will be placed.</p>
1539     * <p>It is perfectly acceptable for multiple receivers to process the
1540     * outgoing call in turn: for example, a parental control application
1541     * might verify that the user is authorized to place the call at that
1542     * time, then a number-rewriting application might add an area code if
1543     * one was not specified.</p>
1544     * <p>For consistency, any receiver whose purpose is to prohibit phone
1545     * calls should have a priority of 0, to ensure it will see the final
1546     * phone number to be dialed.
1547     * Any receiver whose purpose is to rewrite phone numbers to be called
1548     * should have a positive priority.
1549     * Negative priorities are reserved for the system for this broadcast;
1550     * using them may cause problems.</p>
1551     * <p>Any BroadcastReceiver receiving this Intent <em>must not</em>
1552     * abort the broadcast.</p>
1553     * <p>Emergency calls cannot be intercepted using this mechanism, and
1554     * other calls cannot be modified to call emergency numbers using this
1555     * mechanism.
1556     * <p>You must hold the
1557     * {@link android.Manifest.permission#PROCESS_OUTGOING_CALLS}
1558     * permission to receive this Intent.</p>
1559     */
1560    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1561    public static final String ACTION_NEW_OUTGOING_CALL =
1562            "android.intent.action.NEW_OUTGOING_CALL";
1563
1564    /**
1565     * Broadcast Action: Have the device reboot.  This is only for use by
1566     * system code.
1567     */
1568    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
1569    public static final String ACTION_REBOOT =
1570            "android.intent.action.REBOOT";
1571
1572    // ---------------------------------------------------------------------
1573    // ---------------------------------------------------------------------
1574    // Standard intent categories (see addCategory()).
1575
1576    /**
1577     * Set if the activity should be an option for the default action
1578     * (center press) to perform on a piece of data.  Setting this will
1579     * hide from the user any activities without it set when performing an
1580     * action on some data.  Note that this is normal -not- set in the
1581     * Intent when initiating an action -- it is for use in intent filters
1582     * specified in packages.
1583     */
1584    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
1585    public static final String CATEGORY_DEFAULT = "android.intent.category.DEFAULT";
1586    /**
1587     * Activities that can be safely invoked from a browser must support this
1588     * category.  For example, if the user is viewing a web page or an e-mail
1589     * and clicks on a link in the text, the Intent generated execute that
1590     * link will require the BROWSABLE category, so that only activities
1591     * supporting this category will be considered as possible actions.  By
1592     * supporting this category, you are promising that there is nothing
1593     * damaging (without user intervention) that can happen by invoking any
1594     * matching Intent.
1595     */
1596    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
1597    public static final String CATEGORY_BROWSABLE = "android.intent.category.BROWSABLE";
1598    /**
1599     * Set if the activity should be considered as an alternative action to
1600     * the data the user is currently viewing.  See also
1601     * {@link #CATEGORY_SELECTED_ALTERNATIVE} for an alternative action that
1602     * applies to the selection in a list of items.
1603     *
1604     * <p>Supporting this category means that you would like your activity to be
1605     * displayed in the set of alternative things the user can do, usually as
1606     * part of the current activity's options menu.  You will usually want to
1607     * include a specific label in the &lt;intent-filter&gt; of this action
1608     * describing to the user what it does.
1609     *
1610     * <p>The action of IntentFilter with this category is important in that it
1611     * describes the specific action the target will perform.  This generally
1612     * should not be a generic action (such as {@link #ACTION_VIEW}, but rather
1613     * a specific name such as "com.android.camera.action.CROP.  Only one
1614     * alternative of any particular action will be shown to the user, so using
1615     * a specific action like this makes sure that your alternative will be
1616     * displayed while also allowing other applications to provide their own
1617     * overrides of that particular action.
1618     */
1619    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
1620    public static final String CATEGORY_ALTERNATIVE = "android.intent.category.ALTERNATIVE";
1621    /**
1622     * Set if the activity should be considered as an alternative selection
1623     * action to the data the user has currently selected.  This is like
1624     * {@link #CATEGORY_ALTERNATIVE}, but is used in activities showing a list
1625     * of items from which the user can select, giving them alternatives to the
1626     * default action that will be performed on it.
1627     */
1628    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
1629    public static final String CATEGORY_SELECTED_ALTERNATIVE = "android.intent.category.SELECTED_ALTERNATIVE";
1630    /**
1631     * Intended to be used as a tab inside of an containing TabActivity.
1632     */
1633    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
1634    public static final String CATEGORY_TAB = "android.intent.category.TAB";
1635    /**
1636     * Should be displayed in the top-level launcher.
1637     */
1638    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
1639    public static final String CATEGORY_LAUNCHER = "android.intent.category.LAUNCHER";
1640    /**
1641     * Provides information about the package it is in; typically used if
1642     * a package does not contain a {@link #CATEGORY_LAUNCHER} to provide
1643     * a front-door to the user without having to be shown in the all apps list.
1644     */
1645    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
1646    public static final String CATEGORY_INFO = "android.intent.category.INFO";
1647    /**
1648     * This is the home activity, that is the first activity that is displayed
1649     * when the device boots.
1650     */
1651    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
1652    public static final String CATEGORY_HOME = "android.intent.category.HOME";
1653    /**
1654     * This activity is a preference panel.
1655     */
1656    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
1657    public static final String CATEGORY_PREFERENCE = "android.intent.category.PREFERENCE";
1658    /**
1659     * This activity is a development preference panel.
1660     */
1661    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
1662    public static final String CATEGORY_DEVELOPMENT_PREFERENCE = "android.intent.category.DEVELOPMENT_PREFERENCE";
1663    /**
1664     * Capable of running inside a parent activity container.
1665     */
1666    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
1667    public static final String CATEGORY_EMBED = "android.intent.category.EMBED";
1668    /**
1669     * This activity may be exercised by the monkey or other automated test tools.
1670     */
1671    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
1672    public static final String CATEGORY_MONKEY = "android.intent.category.MONKEY";
1673    /**
1674     * To be used as a test (not part of the normal user experience).
1675     */
1676    public static final String CATEGORY_TEST = "android.intent.category.TEST";
1677    /**
1678     * To be used as a unit test (run through the Test Harness).
1679     */
1680    public static final String CATEGORY_UNIT_TEST = "android.intent.category.UNIT_TEST";
1681    /**
1682     * To be used as an sample code example (not part of the normal user
1683     * experience).
1684     */
1685    public static final String CATEGORY_SAMPLE_CODE = "android.intent.category.SAMPLE_CODE";
1686    /**
1687     * Used to indicate that a GET_CONTENT intent only wants URIs that can be opened with
1688     * ContentResolver.openInputStream. Openable URIs must support the columns in OpenableColumns
1689     * when queried, though it is allowable for those columns to be blank.
1690     */
1691    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
1692    public static final String CATEGORY_OPENABLE = "android.intent.category.OPENABLE";
1693
1694    /**
1695     * To be used as code under test for framework instrumentation tests.
1696     */
1697    public static final String CATEGORY_FRAMEWORK_INSTRUMENTATION_TEST =
1698            "android.intent.category.FRAMEWORK_INSTRUMENTATION_TEST";
1699    // ---------------------------------------------------------------------
1700    // ---------------------------------------------------------------------
1701    // Standard extra data keys.
1702
1703    /**
1704     * The initial data to place in a newly created record.  Use with
1705     * {@link #ACTION_INSERT}.  The data here is a Map containing the same
1706     * fields as would be given to the underlying ContentProvider.insert()
1707     * call.
1708     */
1709    public static final String EXTRA_TEMPLATE = "android.intent.extra.TEMPLATE";
1710
1711    /**
1712     * A constant CharSequence that is associated with the Intent, used with
1713     * {@link #ACTION_SEND} to supply the literal data to be sent.  Note that
1714     * this may be a styled CharSequence, so you must use
1715     * {@link Bundle#getCharSequence(String) Bundle.getCharSequence()} to
1716     * retrieve it.
1717     */
1718    public static final String EXTRA_TEXT = "android.intent.extra.TEXT";
1719
1720    /**
1721     * A content: URI holding a stream of data associated with the Intent,
1722     * used with {@link #ACTION_SEND} to supply the data being sent.
1723     */
1724    public static final String EXTRA_STREAM = "android.intent.extra.STREAM";
1725
1726    /**
1727     * A String[] holding e-mail addresses that should be delivered to.
1728     */
1729    public static final String EXTRA_EMAIL       = "android.intent.extra.EMAIL";
1730
1731    /**
1732     * A String[] holding e-mail addresses that should be carbon copied.
1733     */
1734    public static final String EXTRA_CC       = "android.intent.extra.CC";
1735
1736    /**
1737     * A String[] holding e-mail addresses that should be blind carbon copied.
1738     */
1739    public static final String EXTRA_BCC      = "android.intent.extra.BCC";
1740
1741    /**
1742     * A constant string holding the desired subject line of a message.
1743     */
1744    public static final String EXTRA_SUBJECT  = "android.intent.extra.SUBJECT";
1745
1746    /**
1747     * An Intent describing the choices you would like shown with
1748     * {@link #ACTION_PICK_ACTIVITY}.
1749     */
1750    public static final String EXTRA_INTENT = "android.intent.extra.INTENT";
1751
1752    /**
1753     * A CharSequence dialog title to provide to the user when used with a
1754     * {@link #ACTION_CHOOSER}.
1755     */
1756    public static final String EXTRA_TITLE = "android.intent.extra.TITLE";
1757
1758    /**
1759     * A {@link android.view.KeyEvent} object containing the event that
1760     * triggered the creation of the Intent it is in.
1761     */
1762    public static final String EXTRA_KEY_EVENT = "android.intent.extra.KEY_EVENT";
1763
1764    /**
1765     * Used as an boolean extra field in {@link android.content.Intent#ACTION_PACKAGE_REMOVED} or
1766     * {@link android.content.Intent#ACTION_PACKAGE_CHANGED} intents to override the default action
1767     * of restarting the application.
1768     */
1769    public static final String EXTRA_DONT_KILL_APP = "android.intent.extra.DONT_KILL_APP";
1770
1771    /**
1772     * A String holding the phone number originally entered in
1773     * {@link android.content.Intent#ACTION_NEW_OUTGOING_CALL}, or the actual
1774     * number to call in a {@link android.content.Intent#ACTION_CALL}.
1775     */
1776    public static final String EXTRA_PHONE_NUMBER = "android.intent.extra.PHONE_NUMBER";
1777    /**
1778     * Used as an int extra field in {@link android.content.Intent#ACTION_UID_REMOVED}
1779     * intents to supply the uid the package had been assigned.  Also an optional
1780     * extra in {@link android.content.Intent#ACTION_PACKAGE_REMOVED} or
1781     * {@link android.content.Intent#ACTION_PACKAGE_CHANGED} for the same
1782     * purpose.
1783     */
1784    public static final String EXTRA_UID = "android.intent.extra.UID";
1785
1786    /**
1787     * Used as a boolean extra field in {@link android.content.Intent#ACTION_PACKAGE_REMOVED}
1788     * intents to indicate whether this represents a full uninstall (removing
1789     * both the code and its data) or a partial uninstall (leaving its data,
1790     * implying that this is an update).
1791     */
1792    public static final String EXTRA_DATA_REMOVED = "android.intent.extra.DATA_REMOVED";
1793
1794    /**
1795     * Used as a boolean extra field in {@link android.content.Intent#ACTION_PACKAGE_REMOVED}
1796     * intents to indicate that this is a replacement of the package, so this
1797     * broadcast will immediately be followed by an add broadcast for a
1798     * different version of the same package.
1799     */
1800    public static final String EXTRA_REPLACING = "android.intent.extra.REPLACING";
1801
1802    /**
1803     * Used as an int extra field in {@link android.app.AlarmManager} intents
1804     * to tell the application being invoked how many pending alarms are being
1805     * delievered with the intent.  For one-shot alarms this will always be 1.
1806     * For recurring alarms, this might be greater than 1 if the device was
1807     * asleep or powered off at the time an earlier alarm would have been
1808     * delivered.
1809     */
1810    public static final String EXTRA_ALARM_COUNT = "android.intent.extra.ALARM_COUNT";
1811
1812    /**
1813     * Used as a parcelable extra field in {@link #ACTION_APP_ERROR}, containing
1814     * the bug report.
1815     *
1816     * @hide
1817     */
1818    public static final String EXTRA_BUG_REPORT = "android.intent.extra.BUG_REPORT";
1819
1820    /**
1821     * Used as a string extra field when sending an intent to PackageInstaller to install a
1822     * package. Specifies the installer package name; this package will receive the
1823     * {@link #ACTION_APP_ERROR} intent.
1824     *
1825     * @hide
1826     */
1827    public static final String EXTRA_INSTALLER_PACKAGE_NAME
1828            = "android.intent.extra.INSTALLER_PACKAGE_NAME";
1829
1830    // ---------------------------------------------------------------------
1831    // ---------------------------------------------------------------------
1832    // Intent flags (see mFlags variable).
1833
1834    /**
1835     * If set, the recipient of this Intent will be granted permission to
1836     * perform read operations on the Uri in the Intent's data.
1837     */
1838    public static final int FLAG_GRANT_READ_URI_PERMISSION = 0x00000001;
1839    /**
1840     * If set, the recipient of this Intent will be granted permission to
1841     * perform write operations on the Uri in the Intent's data.
1842     */
1843    public static final int FLAG_GRANT_WRITE_URI_PERMISSION = 0x00000002;
1844    /**
1845     * Can be set by the caller to indicate that this Intent is coming from
1846     * a background operation, not from direct user interaction.
1847     */
1848    public static final int FLAG_FROM_BACKGROUND = 0x00000004;
1849    /**
1850     * A flag you can enable for debugging: when set, log messages will be
1851     * printed during the resolution of this intent to show you what has
1852     * been found to create the final resolved list.
1853     */
1854    public static final int FLAG_DEBUG_LOG_RESOLUTION = 0x00000008;
1855
1856    /**
1857     * If set, the new activity is not kept in the history stack.  As soon as
1858     * the user navigates away from it, the activity is finished.  This may also
1859     * be set with the {@link android.R.styleable#AndroidManifestActivity_noHistory
1860     * noHistory} attribute.
1861     */
1862    public static final int FLAG_ACTIVITY_NO_HISTORY = 0x40000000;
1863    /**
1864     * If set, the activity will not be launched if it is already running
1865     * at the top of the history stack.
1866     */
1867    public static final int FLAG_ACTIVITY_SINGLE_TOP = 0x20000000;
1868    /**
1869     * If set, this activity will become the start of a new task on this
1870     * history stack.  A task (from the activity that started it to the
1871     * next task activity) defines an atomic group of activities that the
1872     * user can move to.  Tasks can be moved to the foreground and background;
1873     * all of the activities inside of a particular task always remain in
1874     * the same order.  See
1875     * <a href="{@docRoot}guide/topics/fundamentals.html#acttask">Application Fundamentals:
1876     * Activities and Tasks</a> for more details on tasks.
1877     *
1878     * <p>This flag is generally used by activities that want
1879     * to present a "launcher" style behavior: they give the user a list of
1880     * separate things that can be done, which otherwise run completely
1881     * independently of the activity launching them.
1882     *
1883     * <p>When using this flag, if a task is already running for the activity
1884     * you are now starting, then a new activity will not be started; instead,
1885     * the current task will simply be brought to the front of the screen with
1886     * the state it was last in.  See {@link #FLAG_ACTIVITY_MULTIPLE_TASK} for a flag
1887     * to disable this behavior.
1888     *
1889     * <p>This flag can not be used when the caller is requesting a result from
1890     * the activity being launched.
1891     */
1892    public static final int FLAG_ACTIVITY_NEW_TASK = 0x10000000;
1893    /**
1894     * <strong>Do not use this flag unless you are implementing your own
1895     * top-level application launcher.</strong>  Used in conjunction with
1896     * {@link #FLAG_ACTIVITY_NEW_TASK} to disable the
1897     * behavior of bringing an existing task to the foreground.  When set,
1898     * a new task is <em>always</em> started to host the Activity for the
1899     * Intent, regardless of whether there is already an existing task running
1900     * the same thing.
1901     *
1902     * <p><strong>Because the default system does not include graphical task management,
1903     * you should not use this flag unless you provide some way for a user to
1904     * return back to the tasks you have launched.</strong>
1905     *
1906     * <p>This flag is ignored if
1907     * {@link #FLAG_ACTIVITY_NEW_TASK} is not set.
1908     *
1909     * <p>See <a href="{@docRoot}guide/topics/fundamentals.html#acttask">Application Fundamentals:
1910     * Activities and Tasks</a> for more details on tasks.
1911     */
1912    public static final int FLAG_ACTIVITY_MULTIPLE_TASK = 0x08000000;
1913    /**
1914     * If set, and the activity being launched is already running in the
1915     * current task, then instead of launching a new instance of that activity,
1916     * all of the other activities on top of it will be closed and this Intent
1917     * will be delivered to the (now on top) old activity as a new Intent.
1918     *
1919     * <p>For example, consider a task consisting of the activities: A, B, C, D.
1920     * If D calls startActivity() with an Intent that resolves to the component
1921     * of activity B, then C and D will be finished and B receive the given
1922     * Intent, resulting in the stack now being: A, B.
1923     *
1924     * <p>The currently running instance of task B in the above example will
1925     * either receive the new intent you are starting here in its
1926     * onNewIntent() method, or be itself finished and restarted with the
1927     * new intent.  If it has declared its launch mode to be "multiple" (the
1928     * default) it will be finished and re-created; for all other launch modes
1929     * it will receive the Intent in the current instance.
1930     *
1931     * <p>This launch mode can also be used to good effect in conjunction with
1932     * {@link #FLAG_ACTIVITY_NEW_TASK}: if used to start the root activity
1933     * of a task, it will bring any currently running instance of that task
1934     * to the foreground, and then clear it to its root state.  This is
1935     * especially useful, for example, when launching an activity from the
1936     * notification manager.
1937     *
1938     * <p>See <a href="{@docRoot}guide/topics/fundamentals.html#acttask">Application Fundamentals:
1939     * Activities and Tasks</a> for more details on tasks.
1940     */
1941    public static final int FLAG_ACTIVITY_CLEAR_TOP = 0x04000000;
1942    /**
1943     * If set and this intent is being used to launch a new activity from an
1944     * existing one, then the reply target of the existing activity will be
1945     * transfered to the new activity.  This way the new activity can call
1946     * {@link android.app.Activity#setResult} and have that result sent back to
1947     * the reply target of the original activity.
1948     */
1949    public static final int FLAG_ACTIVITY_FORWARD_RESULT = 0x02000000;
1950    /**
1951     * If set and this intent is being used to launch a new activity from an
1952     * existing one, the current activity will not be counted as the top
1953     * activity for deciding whether the new intent should be delivered to
1954     * the top instead of starting a new one.  The previous activity will
1955     * be used as the top, with the assumption being that the current activity
1956     * will finish itself immediately.
1957     */
1958    public static final int FLAG_ACTIVITY_PREVIOUS_IS_TOP = 0x01000000;
1959    /**
1960     * If set, the new activity is not kept in the list of recently launched
1961     * activities.
1962     */
1963    public static final int FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS = 0x00800000;
1964    /**
1965     * This flag is not normally set by application code, but set for you by
1966     * the system as described in the
1967     * {@link android.R.styleable#AndroidManifestActivity_launchMode
1968     * launchMode} documentation for the singleTask mode.
1969     */
1970    public static final int FLAG_ACTIVITY_BROUGHT_TO_FRONT = 0x00400000;
1971    /**
1972     * If set, and this activity is either being started in a new task or
1973     * bringing to the top an existing task, then it will be launched as
1974     * the front door of the task.  This will result in the application of
1975     * any affinities needed to have that task in the proper state (either
1976     * moving activities to or from it), or simply resetting that task to
1977     * its initial state if needed.
1978     */
1979    public static final int FLAG_ACTIVITY_RESET_TASK_IF_NEEDED = 0x00200000;
1980    /**
1981     * This flag is not normally set by application code, but set for you by
1982     * the system if this activity is being launched from history
1983     * (longpress home key).
1984     */
1985    public static final int FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY = 0x00100000;
1986    /**
1987     * If set, this marks a point in the task's activity stack that should
1988     * be cleared when the task is reset.  That is, the next time the task
1989     * is brought to the foreground with
1990     * {@link #FLAG_ACTIVITY_RESET_TASK_IF_NEEDED} (typically as a result of
1991     * the user re-launching it from home), this activity and all on top of
1992     * it will be finished so that the user does not return to them, but
1993     * instead returns to whatever activity preceeded it.
1994     *
1995     * <p>This is useful for cases where you have a logical break in your
1996     * application.  For example, an e-mail application may have a command
1997     * to view an attachment, which launches an image view activity to
1998     * display it.  This activity should be part of the e-mail application's
1999     * task, since it is a part of the task the user is involved in.  However,
2000     * if the user leaves that task, and later selects the e-mail app from
2001     * home, we may like them to return to the conversation they were
2002     * viewing, not the picture attachment, since that is confusing.  By
2003     * setting this flag when launching the image viewer, that viewer and
2004     * any activities it starts will be removed the next time the user returns
2005     * to mail.
2006     */
2007    public static final int FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET = 0x00080000;
2008    /**
2009     * If set, this flag will prevent the normal {@link android.app.Activity#onUserLeaveHint}
2010     * callback from occurring on the current frontmost activity before it is
2011     * paused as the newly-started activity is brought to the front.
2012     *
2013     * <p>Typically, an activity can rely on that callback to indicate that an
2014     * explicit user action has caused their activity to be moved out of the
2015     * foreground. The callback marks an appropriate point in the activity's
2016     * lifecycle for it to dismiss any notifications that it intends to display
2017     * "until the user has seen them," such as a blinking LED.
2018     *
2019     * <p>If an activity is ever started via any non-user-driven events such as
2020     * phone-call receipt or an alarm handler, this flag should be passed to {@link
2021     * Context#startActivity Context.startActivity}, ensuring that the pausing
2022     * activity does not think the user has acknowledged its notification.
2023     */
2024    public static final int FLAG_ACTIVITY_NO_USER_ACTION = 0x00040000;
2025    /**
2026     * If set in an Intent passed to {@link Context#startActivity Context.startActivity()},
2027     * this flag will cause the launched activity to be brought to the front of its
2028     * task's history stack if it is already running.
2029     *
2030     * <p>For example, consider a task consisting of four activities: A, B, C, D.
2031     * If D calls startActivity() with an Intent that resolves to the component
2032     * of activity B, then B will be brought to the front of the history stack,
2033     * with this resulting order:  A, C, D, B.
2034     *
2035     * This flag will be ignored if {@link #FLAG_ACTIVITY_CLEAR_TOP} is also
2036     * specified.
2037     */
2038    public static final int FLAG_ACTIVITY_REORDER_TO_FRONT = 0X00020000;
2039    /**
2040     * If set, when sending a broadcast only registered receivers will be
2041     * called -- no BroadcastReceiver components will be launched.
2042     */
2043    public static final int FLAG_RECEIVER_REGISTERED_ONLY = 0x40000000;
2044    /**
2045     * If set, when sending a broadcast <i>before boot has completed</i> only
2046     * registered receivers will be called -- no BroadcastReceiver components
2047     * will be launched.  Sticky intent state will be recorded properly even
2048     * if no receivers wind up being called.  If {@link #FLAG_RECEIVER_REGISTERED_ONLY}
2049     * is specified in the broadcast intent, this flag is unnecessary.
2050     *
2051     * <p>This flag is only for use by system sevices as a convenience to
2052     * avoid having to implement a more complex mechanism around detection
2053     * of boot completion.
2054     *
2055     * @hide
2056     */
2057    public static final int FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT = 0x20000000;
2058
2059    // ---------------------------------------------------------------------
2060    // ---------------------------------------------------------------------
2061    // toUri() and parseUri() options.
2062
2063    /**
2064     * Flag for use with {@link #toUri} and {@link #parseUri}: the URI string
2065     * always has the "intent:" scheme.  This syntax can be used when you want
2066     * to later disambiguate between URIs that are intended to describe an
2067     * Intent vs. all others that should be treated as raw URIs.  When used
2068     * with {@link #parseUri}, any other scheme will result in a generic
2069     * VIEW action for that raw URI.
2070     */
2071    public static final int URI_INTENT_SCHEME = 1<<0;
2072
2073    // ---------------------------------------------------------------------
2074
2075    private String mAction;
2076    private Uri mData;
2077    private String mType;
2078    private String mPackage;
2079    private ComponentName mComponent;
2080    private int mFlags;
2081    private HashSet<String> mCategories;
2082    private Bundle mExtras;
2083
2084    // ---------------------------------------------------------------------
2085
2086    /**
2087     * Create an empty intent.
2088     */
2089    public Intent() {
2090    }
2091
2092    /**
2093     * Copy constructor.
2094     */
2095    public Intent(Intent o) {
2096        this.mAction = o.mAction;
2097        this.mData = o.mData;
2098        this.mType = o.mType;
2099        this.mPackage = o.mPackage;
2100        this.mComponent = o.mComponent;
2101        this.mFlags = o.mFlags;
2102        if (o.mCategories != null) {
2103            this.mCategories = new HashSet<String>(o.mCategories);
2104        }
2105        if (o.mExtras != null) {
2106            this.mExtras = new Bundle(o.mExtras);
2107        }
2108    }
2109
2110    @Override
2111    public Object clone() {
2112        return new Intent(this);
2113    }
2114
2115    private Intent(Intent o, boolean all) {
2116        this.mAction = o.mAction;
2117        this.mData = o.mData;
2118        this.mType = o.mType;
2119        this.mPackage = o.mPackage;
2120        this.mComponent = o.mComponent;
2121        if (o.mCategories != null) {
2122            this.mCategories = new HashSet<String>(o.mCategories);
2123        }
2124    }
2125
2126    /**
2127     * Make a clone of only the parts of the Intent that are relevant for
2128     * filter matching: the action, data, type, component, and categories.
2129     */
2130    public Intent cloneFilter() {
2131        return new Intent(this, false);
2132    }
2133
2134    /**
2135     * Create an intent with a given action.  All other fields (data, type,
2136     * class) are null.  Note that the action <em>must</em> be in a
2137     * namespace because Intents are used globally in the system -- for
2138     * example the system VIEW action is android.intent.action.VIEW; an
2139     * application's custom action would be something like
2140     * com.google.app.myapp.CUSTOM_ACTION.
2141     *
2142     * @param action The Intent action, such as ACTION_VIEW.
2143     */
2144    public Intent(String action) {
2145        mAction = action;
2146    }
2147
2148    /**
2149     * Create an intent with a given action and for a given data url.  Note
2150     * that the action <em>must</em> be in a namespace because Intents are
2151     * used globally in the system -- for example the system VIEW action is
2152     * android.intent.action.VIEW; an application's custom action would be
2153     * something like com.google.app.myapp.CUSTOM_ACTION.
2154     *
2155     * <p><em>Note: scheme and host name matching in the Android framework is
2156     * case-sensitive, unlike the formal RFC.  As a result,
2157     * you should always ensure that you write your Uri with these elements
2158     * using lower case letters, and normalize any Uris you receive from
2159     * outside of Android to ensure the scheme and host is lower case.</em></p>
2160     *
2161     * @param action The Intent action, such as ACTION_VIEW.
2162     * @param uri The Intent data URI.
2163     */
2164    public Intent(String action, Uri uri) {
2165        mAction = action;
2166        mData = uri;
2167    }
2168
2169    /**
2170     * Create an intent for a specific component.  All other fields (action, data,
2171     * type, class) are null, though they can be modified later with explicit
2172     * calls.  This provides a convenient way to create an intent that is
2173     * intended to execute a hard-coded class name, rather than relying on the
2174     * system to find an appropriate class for you; see {@link #setComponent}
2175     * for more information on the repercussions of this.
2176     *
2177     * @param packageContext A Context of the application package implementing
2178     * this class.
2179     * @param cls The component class that is to be used for the intent.
2180     *
2181     * @see #setClass
2182     * @see #setComponent
2183     * @see #Intent(String, android.net.Uri , Context, Class)
2184     */
2185    public Intent(Context packageContext, Class<?> cls) {
2186        mComponent = new ComponentName(packageContext, cls);
2187    }
2188
2189    /**
2190     * Create an intent for a specific component with a specified action and data.
2191     * This is equivalent using {@link #Intent(String, android.net.Uri)} to
2192     * construct the Intent and then calling {@link #setClass} to set its
2193     * class.
2194     *
2195     * <p><em>Note: scheme and host name matching in the Android framework is
2196     * case-sensitive, unlike the formal RFC.  As a result,
2197     * you should always ensure that you write your Uri with these elements
2198     * using lower case letters, and normalize any Uris you receive from
2199     * outside of Android to ensure the scheme and host is lower case.</em></p>
2200     *
2201     * @param action The Intent action, such as ACTION_VIEW.
2202     * @param uri The Intent data URI.
2203     * @param packageContext A Context of the application package implementing
2204     * this class.
2205     * @param cls The component class that is to be used for the intent.
2206     *
2207     * @see #Intent(String, android.net.Uri)
2208     * @see #Intent(Context, Class)
2209     * @see #setClass
2210     * @see #setComponent
2211     */
2212    public Intent(String action, Uri uri,
2213            Context packageContext, Class<?> cls) {
2214        mAction = action;
2215        mData = uri;
2216        mComponent = new ComponentName(packageContext, cls);
2217    }
2218
2219    /**
2220     * Call {@link #parseUri} with 0 flags.
2221     * @deprecated Use {@link #parseUri} instead.
2222     */
2223    @Deprecated
2224    public static Intent getIntent(String uri) throws URISyntaxException {
2225        return parseUri(uri, 0);
2226    }
2227
2228    /**
2229     * Create an intent from a URI.  This URI may encode the action,
2230     * category, and other intent fields, if it was returned by
2231     * {@link #toUri}..  If the Intent was not generate by toUri(), its data
2232     * will be the entire URI and its action will be ACTION_VIEW.
2233     *
2234     * <p>The URI given here must not be relative -- that is, it must include
2235     * the scheme and full path.
2236     *
2237     * @param uri The URI to turn into an Intent.
2238     * @param flags Additional processing flags.  Either 0 or
2239     *
2240     * @return Intent The newly created Intent object.
2241     *
2242     * @throws URISyntaxException Throws URISyntaxError if the basic URI syntax
2243     * it bad (as parsed by the Uri class) or the Intent data within the
2244     * URI is invalid.
2245     *
2246     * @see #toUri
2247     */
2248    public static Intent parseUri(String uri, int flags) throws URISyntaxException {
2249        int i = 0;
2250        try {
2251            // Validate intent scheme for if requested.
2252            if ((flags&URI_INTENT_SCHEME) != 0) {
2253                if (!uri.startsWith("intent:")) {
2254                    Intent intent = new Intent(ACTION_VIEW);
2255                    try {
2256                        intent.setData(Uri.parse(uri));
2257                    } catch (IllegalArgumentException e) {
2258                        throw new URISyntaxException(uri, e.getMessage());
2259                    }
2260                    return intent;
2261                }
2262            }
2263
2264            // simple case
2265            i = uri.lastIndexOf("#");
2266            if (i == -1) return new Intent(ACTION_VIEW, Uri.parse(uri));
2267
2268            // old format Intent URI
2269            if (!uri.startsWith("#Intent;", i)) return getIntentOld(uri);
2270
2271            // new format
2272            Intent intent = new Intent(ACTION_VIEW);
2273
2274            // fetch data part, if present
2275            String data = i >= 0 ? uri.substring(0, i) : null;
2276            String scheme = null;
2277            i += "#Intent;".length();
2278
2279            // loop over contents of Intent, all name=value;
2280            while (!uri.startsWith("end", i)) {
2281                int eq = uri.indexOf('=', i);
2282                int semi = uri.indexOf(';', eq);
2283                String value = Uri.decode(uri.substring(eq + 1, semi));
2284
2285                // action
2286                if (uri.startsWith("action=", i)) {
2287                    intent.mAction = value;
2288                }
2289
2290                // categories
2291                else if (uri.startsWith("category=", i)) {
2292                    intent.addCategory(value);
2293                }
2294
2295                // type
2296                else if (uri.startsWith("type=", i)) {
2297                    intent.mType = value;
2298                }
2299
2300                // launch  flags
2301                else if (uri.startsWith("launchFlags=", i)) {
2302                    intent.mFlags = Integer.decode(value).intValue();
2303                }
2304
2305                // package
2306                else if (uri.startsWith("package=", i)) {
2307                    intent.mPackage = value;
2308                }
2309
2310                // component
2311                else if (uri.startsWith("component=", i)) {
2312                    intent.mComponent = ComponentName.unflattenFromString(value);
2313                }
2314
2315                // scheme
2316                else if (uri.startsWith("scheme=", i)) {
2317                    scheme = value;
2318                }
2319
2320                // extra
2321                else {
2322                    String key = Uri.decode(uri.substring(i + 2, eq));
2323                    // create Bundle if it doesn't already exist
2324                    if (intent.mExtras == null) intent.mExtras = new Bundle();
2325                    Bundle b = intent.mExtras;
2326                    // add EXTRA
2327                    if      (uri.startsWith("S.", i)) b.putString(key, value);
2328                    else if (uri.startsWith("B.", i)) b.putBoolean(key, Boolean.parseBoolean(value));
2329                    else if (uri.startsWith("b.", i)) b.putByte(key, Byte.parseByte(value));
2330                    else if (uri.startsWith("c.", i)) b.putChar(key, value.charAt(0));
2331                    else if (uri.startsWith("d.", i)) b.putDouble(key, Double.parseDouble(value));
2332                    else if (uri.startsWith("f.", i)) b.putFloat(key, Float.parseFloat(value));
2333                    else if (uri.startsWith("i.", i)) b.putInt(key, Integer.parseInt(value));
2334                    else if (uri.startsWith("l.", i)) b.putLong(key, Long.parseLong(value));
2335                    else if (uri.startsWith("s.", i)) b.putShort(key, Short.parseShort(value));
2336                    else throw new URISyntaxException(uri, "unknown EXTRA type", i);
2337                }
2338
2339                // move to the next item
2340                i = semi + 1;
2341            }
2342
2343            if (data != null) {
2344                if (data.startsWith("intent:")) {
2345                    data = data.substring(7);
2346                    if (scheme != null) {
2347                        data = scheme + ':' + data;
2348                    }
2349                }
2350
2351                if (data.length() > 0) {
2352                    try {
2353                        intent.mData = Uri.parse(data);
2354                    } catch (IllegalArgumentException e) {
2355                        throw new URISyntaxException(uri, e.getMessage());
2356                    }
2357                }
2358            }
2359
2360            return intent;
2361
2362        } catch (IndexOutOfBoundsException e) {
2363            throw new URISyntaxException(uri, "illegal Intent URI format", i);
2364        }
2365    }
2366
2367    public static Intent getIntentOld(String uri) throws URISyntaxException {
2368        Intent intent;
2369
2370        int i = uri.lastIndexOf('#');
2371        if (i >= 0) {
2372            Uri data = null;
2373            String action = null;
2374            if (i > 0) {
2375                data = Uri.parse(uri.substring(0, i));
2376            }
2377
2378            i++;
2379
2380            if (uri.regionMatches(i, "action(", 0, 7)) {
2381                i += 7;
2382                int j = uri.indexOf(')', i);
2383                action = uri.substring(i, j);
2384                i = j + 1;
2385            }
2386
2387            intent = new Intent(action, data);
2388
2389            if (uri.regionMatches(i, "categories(", 0, 11)) {
2390                i += 11;
2391                int j = uri.indexOf(')', i);
2392                while (i < j) {
2393                    int sep = uri.indexOf('!', i);
2394                    if (sep < 0) sep = j;
2395                    if (i < sep) {
2396                        intent.addCategory(uri.substring(i, sep));
2397                    }
2398                    i = sep + 1;
2399                }
2400                i = j + 1;
2401            }
2402
2403            if (uri.regionMatches(i, "type(", 0, 5)) {
2404                i += 5;
2405                int j = uri.indexOf(')', i);
2406                intent.mType = uri.substring(i, j);
2407                i = j + 1;
2408            }
2409
2410            if (uri.regionMatches(i, "launchFlags(", 0, 12)) {
2411                i += 12;
2412                int j = uri.indexOf(')', i);
2413                intent.mFlags = Integer.decode(uri.substring(i, j)).intValue();
2414                i = j + 1;
2415            }
2416
2417            if (uri.regionMatches(i, "component(", 0, 10)) {
2418                i += 10;
2419                int j = uri.indexOf(')', i);
2420                int sep = uri.indexOf('!', i);
2421                if (sep >= 0 && sep < j) {
2422                    String pkg = uri.substring(i, sep);
2423                    String cls = uri.substring(sep + 1, j);
2424                    intent.mComponent = new ComponentName(pkg, cls);
2425                }
2426                i = j + 1;
2427            }
2428
2429            if (uri.regionMatches(i, "extras(", 0, 7)) {
2430                i += 7;
2431
2432                final int closeParen = uri.indexOf(')', i);
2433                if (closeParen == -1) throw new URISyntaxException(uri,
2434                        "EXTRA missing trailing ')'", i);
2435
2436                while (i < closeParen) {
2437                    // fetch the key value
2438                    int j = uri.indexOf('=', i);
2439                    if (j <= i + 1 || i >= closeParen) {
2440                        throw new URISyntaxException(uri, "EXTRA missing '='", i);
2441                    }
2442                    char type = uri.charAt(i);
2443                    i++;
2444                    String key = uri.substring(i, j);
2445                    i = j + 1;
2446
2447                    // get type-value
2448                    j = uri.indexOf('!', i);
2449                    if (j == -1 || j >= closeParen) j = closeParen;
2450                    if (i >= j) throw new URISyntaxException(uri, "EXTRA missing '!'", i);
2451                    String value = uri.substring(i, j);
2452                    i = j;
2453
2454                    // create Bundle if it doesn't already exist
2455                    if (intent.mExtras == null) intent.mExtras = new Bundle();
2456
2457                    // add item to bundle
2458                    try {
2459                        switch (type) {
2460                            case 'S':
2461                                intent.mExtras.putString(key, Uri.decode(value));
2462                                break;
2463                            case 'B':
2464                                intent.mExtras.putBoolean(key, Boolean.parseBoolean(value));
2465                                break;
2466                            case 'b':
2467                                intent.mExtras.putByte(key, Byte.parseByte(value));
2468                                break;
2469                            case 'c':
2470                                intent.mExtras.putChar(key, Uri.decode(value).charAt(0));
2471                                break;
2472                            case 'd':
2473                                intent.mExtras.putDouble(key, Double.parseDouble(value));
2474                                break;
2475                            case 'f':
2476                                intent.mExtras.putFloat(key, Float.parseFloat(value));
2477                                break;
2478                            case 'i':
2479                                intent.mExtras.putInt(key, Integer.parseInt(value));
2480                                break;
2481                            case 'l':
2482                                intent.mExtras.putLong(key, Long.parseLong(value));
2483                                break;
2484                            case 's':
2485                                intent.mExtras.putShort(key, Short.parseShort(value));
2486                                break;
2487                            default:
2488                                throw new URISyntaxException(uri, "EXTRA has unknown type", i);
2489                        }
2490                    } catch (NumberFormatException e) {
2491                        throw new URISyntaxException(uri, "EXTRA value can't be parsed", i);
2492                    }
2493
2494                    char ch = uri.charAt(i);
2495                    if (ch == ')') break;
2496                    if (ch != '!') throw new URISyntaxException(uri, "EXTRA missing '!'", i);
2497                    i++;
2498                }
2499            }
2500
2501            if (intent.mAction == null) {
2502                // By default, if no action is specified, then use VIEW.
2503                intent.mAction = ACTION_VIEW;
2504            }
2505
2506        } else {
2507            intent = new Intent(ACTION_VIEW, Uri.parse(uri));
2508        }
2509
2510        return intent;
2511    }
2512
2513    /**
2514     * Retrieve the general action to be performed, such as
2515     * {@link #ACTION_VIEW}.  The action describes the general way the rest of
2516     * the information in the intent should be interpreted -- most importantly,
2517     * what to do with the data returned by {@link #getData}.
2518     *
2519     * @return The action of this intent or null if none is specified.
2520     *
2521     * @see #setAction
2522     */
2523    public String getAction() {
2524        return mAction;
2525    }
2526
2527    /**
2528     * Retrieve data this intent is operating on.  This URI specifies the name
2529     * of the data; often it uses the content: scheme, specifying data in a
2530     * content provider.  Other schemes may be handled by specific activities,
2531     * such as http: by the web browser.
2532     *
2533     * @return The URI of the data this intent is targeting or null.
2534     *
2535     * @see #getScheme
2536     * @see #setData
2537     */
2538    public Uri getData() {
2539        return mData;
2540    }
2541
2542    /**
2543     * The same as {@link #getData()}, but returns the URI as an encoded
2544     * String.
2545     */
2546    public String getDataString() {
2547        return mData != null ? mData.toString() : null;
2548    }
2549
2550    /**
2551     * Return the scheme portion of the intent's data.  If the data is null or
2552     * does not include a scheme, null is returned.  Otherwise, the scheme
2553     * prefix without the final ':' is returned, i.e. "http".
2554     *
2555     * <p>This is the same as calling getData().getScheme() (and checking for
2556     * null data).
2557     *
2558     * @return The scheme of this intent.
2559     *
2560     * @see #getData
2561     */
2562    public String getScheme() {
2563        return mData != null ? mData.getScheme() : null;
2564    }
2565
2566    /**
2567     * Retrieve any explicit MIME type included in the intent.  This is usually
2568     * null, as the type is determined by the intent data.
2569     *
2570     * @return If a type was manually set, it is returned; else null is
2571     *         returned.
2572     *
2573     * @see #resolveType(ContentResolver)
2574     * @see #setType
2575     */
2576    public String getType() {
2577        return mType;
2578    }
2579
2580    /**
2581     * Return the MIME data type of this intent.  If the type field is
2582     * explicitly set, that is simply returned.  Otherwise, if the data is set,
2583     * the type of that data is returned.  If neither fields are set, a null is
2584     * returned.
2585     *
2586     * @return The MIME type of this intent.
2587     *
2588     * @see #getType
2589     * @see #resolveType(ContentResolver)
2590     */
2591    public String resolveType(Context context) {
2592        return resolveType(context.getContentResolver());
2593    }
2594
2595    /**
2596     * Return the MIME data type of this intent.  If the type field is
2597     * explicitly set, that is simply returned.  Otherwise, if the data is set,
2598     * the type of that data is returned.  If neither fields are set, a null is
2599     * returned.
2600     *
2601     * @param resolver A ContentResolver that can be used to determine the MIME
2602     *                 type of the intent's data.
2603     *
2604     * @return The MIME type of this intent.
2605     *
2606     * @see #getType
2607     * @see #resolveType(Context)
2608     */
2609    public String resolveType(ContentResolver resolver) {
2610        if (mType != null) {
2611            return mType;
2612        }
2613        if (mData != null) {
2614            if ("content".equals(mData.getScheme())) {
2615                return resolver.getType(mData);
2616            }
2617        }
2618        return null;
2619    }
2620
2621    /**
2622     * Return the MIME data type of this intent, only if it will be needed for
2623     * intent resolution.  This is not generally useful for application code;
2624     * it is used by the frameworks for communicating with back-end system
2625     * services.
2626     *
2627     * @param resolver A ContentResolver that can be used to determine the MIME
2628     *                 type of the intent's data.
2629     *
2630     * @return The MIME type of this intent, or null if it is unknown or not
2631     *         needed.
2632     */
2633    public String resolveTypeIfNeeded(ContentResolver resolver) {
2634        if (mComponent != null) {
2635            return mType;
2636        }
2637        return resolveType(resolver);
2638    }
2639
2640    /**
2641     * Check if an category exists in the intent.
2642     *
2643     * @param category The category to check.
2644     *
2645     * @return boolean True if the intent contains the category, else false.
2646     *
2647     * @see #getCategories
2648     * @see #addCategory
2649     */
2650    public boolean hasCategory(String category) {
2651        return mCategories != null && mCategories.contains(category);
2652    }
2653
2654    /**
2655     * Return the set of all categories in the intent.  If there are no categories,
2656     * returns NULL.
2657     *
2658     * @return Set The set of categories you can examine.  Do not modify!
2659     *
2660     * @see #hasCategory
2661     * @see #addCategory
2662     */
2663    public Set<String> getCategories() {
2664        return mCategories;
2665    }
2666
2667    /**
2668     * Sets the ClassLoader that will be used when unmarshalling
2669     * any Parcelable values from the extras of this Intent.
2670     *
2671     * @param loader a ClassLoader, or null to use the default loader
2672     * at the time of unmarshalling.
2673     */
2674    public void setExtrasClassLoader(ClassLoader loader) {
2675        if (mExtras != null) {
2676            mExtras.setClassLoader(loader);
2677        }
2678    }
2679
2680    /**
2681     * Returns true if an extra value is associated with the given name.
2682     * @param name the extra's name
2683     * @return true if the given extra is present.
2684     */
2685    public boolean hasExtra(String name) {
2686        return mExtras != null && mExtras.containsKey(name);
2687    }
2688
2689    /**
2690     * Returns true if the Intent's extras contain a parcelled file descriptor.
2691     * @return true if the Intent contains a parcelled file descriptor.
2692     */
2693    public boolean hasFileDescriptors() {
2694        return mExtras != null && mExtras.hasFileDescriptors();
2695    }
2696
2697    /**
2698     * Retrieve extended data from the intent.
2699     *
2700     * @param name The name of the desired item.
2701     *
2702     * @return the value of an item that previously added with putExtra()
2703     * or null if none was found.
2704     *
2705     * @deprecated
2706     * @hide
2707     */
2708    @Deprecated
2709    public Object getExtra(String name) {
2710        return getExtra(name, null);
2711    }
2712
2713    /**
2714     * Retrieve extended data from the intent.
2715     *
2716     * @param name The name of the desired item.
2717     * @param defaultValue the value to be returned if no value of the desired
2718     * type is stored with the given name.
2719     *
2720     * @return the value of an item that previously added with putExtra()
2721     * or the default value if none was found.
2722     *
2723     * @see #putExtra(String, boolean)
2724     */
2725    public boolean getBooleanExtra(String name, boolean defaultValue) {
2726        return mExtras == null ? defaultValue :
2727            mExtras.getBoolean(name, defaultValue);
2728    }
2729
2730    /**
2731     * Retrieve extended data from the intent.
2732     *
2733     * @param name The name of the desired item.
2734     * @param defaultValue the value to be returned if no value of the desired
2735     * type is stored with the given name.
2736     *
2737     * @return the value of an item that previously added with putExtra()
2738     * or the default value if none was found.
2739     *
2740     * @see #putExtra(String, byte)
2741     */
2742    public byte getByteExtra(String name, byte defaultValue) {
2743        return mExtras == null ? defaultValue :
2744            mExtras.getByte(name, defaultValue);
2745    }
2746
2747    /**
2748     * Retrieve extended data from the intent.
2749     *
2750     * @param name The name of the desired item.
2751     * @param defaultValue the value to be returned if no value of the desired
2752     * type is stored with the given name.
2753     *
2754     * @return the value of an item that previously added with putExtra()
2755     * or the default value if none was found.
2756     *
2757     * @see #putExtra(String, short)
2758     */
2759    public short getShortExtra(String name, short defaultValue) {
2760        return mExtras == null ? defaultValue :
2761            mExtras.getShort(name, defaultValue);
2762    }
2763
2764    /**
2765     * Retrieve extended data from the intent.
2766     *
2767     * @param name The name of the desired item.
2768     * @param defaultValue the value to be returned if no value of the desired
2769     * type is stored with the given name.
2770     *
2771     * @return the value of an item that previously added with putExtra()
2772     * or the default value if none was found.
2773     *
2774     * @see #putExtra(String, char)
2775     */
2776    public char getCharExtra(String name, char defaultValue) {
2777        return mExtras == null ? defaultValue :
2778            mExtras.getChar(name, defaultValue);
2779    }
2780
2781    /**
2782     * Retrieve extended data from the intent.
2783     *
2784     * @param name The name of the desired item.
2785     * @param defaultValue the value to be returned if no value of the desired
2786     * type is stored with the given name.
2787     *
2788     * @return the value of an item that previously added with putExtra()
2789     * or the default value if none was found.
2790     *
2791     * @see #putExtra(String, int)
2792     */
2793    public int getIntExtra(String name, int defaultValue) {
2794        return mExtras == null ? defaultValue :
2795            mExtras.getInt(name, defaultValue);
2796    }
2797
2798    /**
2799     * Retrieve extended data from the intent.
2800     *
2801     * @param name The name of the desired item.
2802     * @param defaultValue the value to be returned if no value of the desired
2803     * type is stored with the given name.
2804     *
2805     * @return the value of an item that previously added with putExtra()
2806     * or the default value if none was found.
2807     *
2808     * @see #putExtra(String, long)
2809     */
2810    public long getLongExtra(String name, long defaultValue) {
2811        return mExtras == null ? defaultValue :
2812            mExtras.getLong(name, defaultValue);
2813    }
2814
2815    /**
2816     * Retrieve extended data from the intent.
2817     *
2818     * @param name The name of the desired item.
2819     * @param defaultValue the value to be returned if no value of the desired
2820     * type is stored with the given name.
2821     *
2822     * @return the value of an item that previously added with putExtra(),
2823     * or the default value if no such item is present
2824     *
2825     * @see #putExtra(String, float)
2826     */
2827    public float getFloatExtra(String name, float defaultValue) {
2828        return mExtras == null ? defaultValue :
2829            mExtras.getFloat(name, defaultValue);
2830    }
2831
2832    /**
2833     * Retrieve extended data from the intent.
2834     *
2835     * @param name The name of the desired item.
2836     * @param defaultValue the value to be returned if no value of the desired
2837     * type is stored with the given name.
2838     *
2839     * @return the value of an item that previously added with putExtra()
2840     * or the default value if none was found.
2841     *
2842     * @see #putExtra(String, double)
2843     */
2844    public double getDoubleExtra(String name, double defaultValue) {
2845        return mExtras == null ? defaultValue :
2846            mExtras.getDouble(name, defaultValue);
2847    }
2848
2849    /**
2850     * Retrieve extended data from the intent.
2851     *
2852     * @param name The name of the desired item.
2853     *
2854     * @return the value of an item that previously added with putExtra()
2855     * or null if no String value was found.
2856     *
2857     * @see #putExtra(String, String)
2858     */
2859    public String getStringExtra(String name) {
2860        return mExtras == null ? null : mExtras.getString(name);
2861    }
2862
2863    /**
2864     * Retrieve extended data from the intent.
2865     *
2866     * @param name The name of the desired item.
2867     *
2868     * @return the value of an item that previously added with putExtra()
2869     * or null if no CharSequence value was found.
2870     *
2871     * @see #putExtra(String, CharSequence)
2872     */
2873    public CharSequence getCharSequenceExtra(String name) {
2874        return mExtras == null ? null : mExtras.getCharSequence(name);
2875    }
2876
2877    /**
2878     * Retrieve extended data from the intent.
2879     *
2880     * @param name The name of the desired item.
2881     *
2882     * @return the value of an item that previously added with putExtra()
2883     * or null if no Parcelable value was found.
2884     *
2885     * @see #putExtra(String, Parcelable)
2886     */
2887    public <T extends Parcelable> T getParcelableExtra(String name) {
2888        return mExtras == null ? null : mExtras.<T>getParcelable(name);
2889    }
2890
2891    /**
2892     * Retrieve extended data from the intent.
2893     *
2894     * @param name The name of the desired item.
2895     *
2896     * @return the value of an item that previously added with putExtra()
2897     * or null if no Parcelable[] value was found.
2898     *
2899     * @see #putExtra(String, Parcelable[])
2900     */
2901    public Parcelable[] getParcelableArrayExtra(String name) {
2902        return mExtras == null ? null : mExtras.getParcelableArray(name);
2903    }
2904
2905    /**
2906     * Retrieve extended data from the intent.
2907     *
2908     * @param name The name of the desired item.
2909     *
2910     * @return the value of an item that previously added with putExtra()
2911     * or null if no ArrayList<Parcelable> value was found.
2912     *
2913     * @see #putParcelableArrayListExtra(String, ArrayList)
2914     */
2915    public <T extends Parcelable> ArrayList<T> getParcelableArrayListExtra(String name) {
2916        return mExtras == null ? null : mExtras.<T>getParcelableArrayList(name);
2917    }
2918
2919    /**
2920     * Retrieve extended data from the intent.
2921     *
2922     * @param name The name of the desired item.
2923     *
2924     * @return the value of an item that previously added with putExtra()
2925     * or null if no Serializable value was found.
2926     *
2927     * @see #putExtra(String, Serializable)
2928     */
2929    public Serializable getSerializableExtra(String name) {
2930        return mExtras == null ? null : mExtras.getSerializable(name);
2931    }
2932
2933    /**
2934     * Retrieve extended data from the intent.
2935     *
2936     * @param name The name of the desired item.
2937     *
2938     * @return the value of an item that previously added with putExtra()
2939     * or null if no ArrayList<Integer> value was found.
2940     *
2941     * @see #putIntegerArrayListExtra(String, ArrayList)
2942     */
2943    public ArrayList<Integer> getIntegerArrayListExtra(String name) {
2944        return mExtras == null ? null : mExtras.getIntegerArrayList(name);
2945    }
2946
2947    /**
2948     * Retrieve extended data from the intent.
2949     *
2950     * @param name The name of the desired item.
2951     *
2952     * @return the value of an item that previously added with putExtra()
2953     * or null if no ArrayList<String> value was found.
2954     *
2955     * @see #putStringArrayListExtra(String, ArrayList)
2956     */
2957    public ArrayList<String> getStringArrayListExtra(String name) {
2958        return mExtras == null ? null : mExtras.getStringArrayList(name);
2959    }
2960
2961    /**
2962     * Retrieve extended data from the intent.
2963     *
2964     * @param name The name of the desired item.
2965     *
2966     * @return the value of an item that previously added with putExtra()
2967     * or null if no boolean array value was found.
2968     *
2969     * @see #putExtra(String, boolean[])
2970     */
2971    public boolean[] getBooleanArrayExtra(String name) {
2972        return mExtras == null ? null : mExtras.getBooleanArray(name);
2973    }
2974
2975    /**
2976     * Retrieve extended data from the intent.
2977     *
2978     * @param name The name of the desired item.
2979     *
2980     * @return the value of an item that previously added with putExtra()
2981     * or null if no byte array value was found.
2982     *
2983     * @see #putExtra(String, byte[])
2984     */
2985    public byte[] getByteArrayExtra(String name) {
2986        return mExtras == null ? null : mExtras.getByteArray(name);
2987    }
2988
2989    /**
2990     * Retrieve extended data from the intent.
2991     *
2992     * @param name The name of the desired item.
2993     *
2994     * @return the value of an item that previously added with putExtra()
2995     * or null if no short array value was found.
2996     *
2997     * @see #putExtra(String, short[])
2998     */
2999    public short[] getShortArrayExtra(String name) {
3000        return mExtras == null ? null : mExtras.getShortArray(name);
3001    }
3002
3003    /**
3004     * Retrieve extended data from the intent.
3005     *
3006     * @param name The name of the desired item.
3007     *
3008     * @return the value of an item that previously added with putExtra()
3009     * or null if no char array value was found.
3010     *
3011     * @see #putExtra(String, char[])
3012     */
3013    public char[] getCharArrayExtra(String name) {
3014        return mExtras == null ? null : mExtras.getCharArray(name);
3015    }
3016
3017    /**
3018     * Retrieve extended data from the intent.
3019     *
3020     * @param name The name of the desired item.
3021     *
3022     * @return the value of an item that previously added with putExtra()
3023     * or null if no int array value was found.
3024     *
3025     * @see #putExtra(String, int[])
3026     */
3027    public int[] getIntArrayExtra(String name) {
3028        return mExtras == null ? null : mExtras.getIntArray(name);
3029    }
3030
3031    /**
3032     * Retrieve extended data from the intent.
3033     *
3034     * @param name The name of the desired item.
3035     *
3036     * @return the value of an item that previously added with putExtra()
3037     * or null if no long array value was found.
3038     *
3039     * @see #putExtra(String, long[])
3040     */
3041    public long[] getLongArrayExtra(String name) {
3042        return mExtras == null ? null : mExtras.getLongArray(name);
3043    }
3044
3045    /**
3046     * Retrieve extended data from the intent.
3047     *
3048     * @param name The name of the desired item.
3049     *
3050     * @return the value of an item that previously added with putExtra()
3051     * or null if no float array value was found.
3052     *
3053     * @see #putExtra(String, float[])
3054     */
3055    public float[] getFloatArrayExtra(String name) {
3056        return mExtras == null ? null : mExtras.getFloatArray(name);
3057    }
3058
3059    /**
3060     * Retrieve extended data from the intent.
3061     *
3062     * @param name The name of the desired item.
3063     *
3064     * @return the value of an item that previously added with putExtra()
3065     * or null if no double array value was found.
3066     *
3067     * @see #putExtra(String, double[])
3068     */
3069    public double[] getDoubleArrayExtra(String name) {
3070        return mExtras == null ? null : mExtras.getDoubleArray(name);
3071    }
3072
3073    /**
3074     * Retrieve extended data from the intent.
3075     *
3076     * @param name The name of the desired item.
3077     *
3078     * @return the value of an item that previously added with putExtra()
3079     * or null if no String array value was found.
3080     *
3081     * @see #putExtra(String, String[])
3082     */
3083    public String[] getStringArrayExtra(String name) {
3084        return mExtras == null ? null : mExtras.getStringArray(name);
3085    }
3086
3087    /**
3088     * Retrieve extended data from the intent.
3089     *
3090     * @param name The name of the desired item.
3091     *
3092     * @return the value of an item that previously added with putExtra()
3093     * or null if no Bundle value was found.
3094     *
3095     * @see #putExtra(String, Bundle)
3096     */
3097    public Bundle getBundleExtra(String name) {
3098        return mExtras == null ? null : mExtras.getBundle(name);
3099    }
3100
3101    /**
3102     * Retrieve extended data from the intent.
3103     *
3104     * @param name The name of the desired item.
3105     *
3106     * @return the value of an item that previously added with putExtra()
3107     * or null if no IBinder value was found.
3108     *
3109     * @see #putExtra(String, IBinder)
3110     *
3111     * @deprecated
3112     * @hide
3113     */
3114    @Deprecated
3115    public IBinder getIBinderExtra(String name) {
3116        return mExtras == null ? null : mExtras.getIBinder(name);
3117    }
3118
3119    /**
3120     * Retrieve extended data from the intent.
3121     *
3122     * @param name The name of the desired item.
3123     * @param defaultValue The default value to return in case no item is
3124     * associated with the key 'name'
3125     *
3126     * @return the value of an item that previously added with putExtra()
3127     * or defaultValue if none was found.
3128     *
3129     * @see #putExtra
3130     *
3131     * @deprecated
3132     * @hide
3133     */
3134    @Deprecated
3135    public Object getExtra(String name, Object defaultValue) {
3136        Object result = defaultValue;
3137        if (mExtras != null) {
3138            Object result2 = mExtras.get(name);
3139            if (result2 != null) {
3140                result = result2;
3141            }
3142        }
3143
3144        return result;
3145    }
3146
3147    /**
3148     * Retrieves a map of extended data from the intent.
3149     *
3150     * @return the map of all extras previously added with putExtra(),
3151     * or null if none have been added.
3152     */
3153    public Bundle getExtras() {
3154        return (mExtras != null)
3155                ? new Bundle(mExtras)
3156                : null;
3157    }
3158
3159    /**
3160     * Retrieve any special flags associated with this intent.  You will
3161     * normally just set them with {@link #setFlags} and let the system
3162     * take the appropriate action with them.
3163     *
3164     * @return int The currently set flags.
3165     *
3166     * @see #setFlags
3167     */
3168    public int getFlags() {
3169        return mFlags;
3170    }
3171
3172    /**
3173     * Retrieve the application package name this Intent is limited to.  When
3174     * resolving an Intent, if non-null this limits the resolution to only
3175     * components in the given application package.
3176     *
3177     * @return The name of the application package for the Intent.
3178     *
3179     * @see #resolveActivity
3180     * @see #setPackage
3181     */
3182    public String getPackage() {
3183        return mPackage;
3184    }
3185
3186    /**
3187     * Retrieve the concrete component associated with the intent.  When receiving
3188     * an intent, this is the component that was found to best handle it (that is,
3189     * yourself) and will always be non-null; in all other cases it will be
3190     * null unless explicitly set.
3191     *
3192     * @return The name of the application component to handle the intent.
3193     *
3194     * @see #resolveActivity
3195     * @see #setComponent
3196     */
3197    public ComponentName getComponent() {
3198        return mComponent;
3199    }
3200
3201    /**
3202     * Return the Activity component that should be used to handle this intent.
3203     * The appropriate component is determined based on the information in the
3204     * intent, evaluated as follows:
3205     *
3206     * <p>If {@link #getComponent} returns an explicit class, that is returned
3207     * without any further consideration.
3208     *
3209     * <p>The activity must handle the {@link Intent#CATEGORY_DEFAULT} Intent
3210     * category to be considered.
3211     *
3212     * <p>If {@link #getAction} is non-NULL, the activity must handle this
3213     * action.
3214     *
3215     * <p>If {@link #resolveType} returns non-NULL, the activity must handle
3216     * this type.
3217     *
3218     * <p>If {@link #addCategory} has added any categories, the activity must
3219     * handle ALL of the categories specified.
3220     *
3221     * <p>If {@link #getPackage} is non-NULL, only activity components in
3222     * that application package will be considered.
3223     *
3224     * <p>If there are no activities that satisfy all of these conditions, a
3225     * null string is returned.
3226     *
3227     * <p>If multiple activities are found to satisfy the intent, the one with
3228     * the highest priority will be used.  If there are multiple activities
3229     * with the same priority, the system will either pick the best activity
3230     * based on user preference, or resolve to a system class that will allow
3231     * the user to pick an activity and forward from there.
3232     *
3233     * <p>This method is implemented simply by calling
3234     * {@link PackageManager#resolveActivity} with the "defaultOnly" parameter
3235     * true.</p>
3236     * <p> This API is called for you as part of starting an activity from an
3237     * intent.  You do not normally need to call it yourself.</p>
3238     *
3239     * @param pm The package manager with which to resolve the Intent.
3240     *
3241     * @return Name of the component implementing an activity that can
3242     *         display the intent.
3243     *
3244     * @see #setComponent
3245     * @see #getComponent
3246     * @see #resolveActivityInfo
3247     */
3248    public ComponentName resolveActivity(PackageManager pm) {
3249        if (mComponent != null) {
3250            return mComponent;
3251        }
3252
3253        ResolveInfo info = pm.resolveActivity(
3254            this, PackageManager.MATCH_DEFAULT_ONLY);
3255        if (info != null) {
3256            return new ComponentName(
3257                    info.activityInfo.applicationInfo.packageName,
3258                    info.activityInfo.name);
3259        }
3260
3261        return null;
3262    }
3263
3264    /**
3265     * Resolve the Intent into an {@link ActivityInfo}
3266     * describing the activity that should execute the intent.  Resolution
3267     * follows the same rules as described for {@link #resolveActivity}, but
3268     * you get back the completely information about the resolved activity
3269     * instead of just its class name.
3270     *
3271     * @param pm The package manager with which to resolve the Intent.
3272     * @param flags Addition information to retrieve as per
3273     * {@link PackageManager#getActivityInfo(ComponentName, int)
3274     * PackageManager.getActivityInfo()}.
3275     *
3276     * @return PackageManager.ActivityInfo
3277     *
3278     * @see #resolveActivity
3279     */
3280    public ActivityInfo resolveActivityInfo(PackageManager pm, int flags) {
3281        ActivityInfo ai = null;
3282        if (mComponent != null) {
3283            try {
3284                ai = pm.getActivityInfo(mComponent, flags);
3285            } catch (PackageManager.NameNotFoundException e) {
3286                // ignore
3287            }
3288        } else {
3289            ResolveInfo info = pm.resolveActivity(
3290                this, PackageManager.MATCH_DEFAULT_ONLY);
3291            if (info != null) {
3292                ai = info.activityInfo;
3293            }
3294        }
3295
3296        return ai;
3297    }
3298
3299    /**
3300     * Set the general action to be performed.
3301     *
3302     * @param action An action name, such as ACTION_VIEW.  Application-specific
3303     *               actions should be prefixed with the vendor's package name.
3304     *
3305     * @return Returns the same Intent object, for chaining multiple calls
3306     * into a single statement.
3307     *
3308     * @see #getAction
3309     */
3310    public Intent setAction(String action) {
3311        mAction = action;
3312        return this;
3313    }
3314
3315    /**
3316     * Set the data this intent is operating on.  This method automatically
3317     * clears any type that was previously set by {@link #setType}.
3318     *
3319     * <p><em>Note: scheme and host name matching in the Android framework is
3320     * case-sensitive, unlike the formal RFC.  As a result,
3321     * you should always ensure that you write your Uri with these elements
3322     * using lower case letters, and normalize any Uris you receive from
3323     * outside of Android to ensure the scheme and host is lower case.</em></p>
3324     *
3325     * @param data The URI of the data this intent is now targeting.
3326     *
3327     * @return Returns the same Intent object, for chaining multiple calls
3328     * into a single statement.
3329     *
3330     * @see #getData
3331     * @see #setType
3332     * @see #setDataAndType
3333     */
3334    public Intent setData(Uri data) {
3335        mData = data;
3336        mType = null;
3337        return this;
3338    }
3339
3340    /**
3341     * Set an explicit MIME data type.  This is used to create intents that
3342     * only specify a type and not data, for example to indicate the type of
3343     * data to return.  This method automatically clears any data that was
3344     * previously set by {@link #setData}.
3345     *
3346     * <p><em>Note: MIME type matching in the Android framework is
3347     * case-sensitive, unlike formal RFC MIME types.  As a result,
3348     * you should always write your MIME types with lower case letters,
3349     * and any MIME types you receive from outside of Android should be
3350     * converted to lower case before supplying them here.</em></p>
3351     *
3352     * @param type The MIME type of the data being handled by this intent.
3353     *
3354     * @return Returns the same Intent object, for chaining multiple calls
3355     * into a single statement.
3356     *
3357     * @see #getType
3358     * @see #setData
3359     * @see #setDataAndType
3360     */
3361    public Intent setType(String type) {
3362        mData = null;
3363        mType = type;
3364        return this;
3365    }
3366
3367    /**
3368     * (Usually optional) Set the data for the intent along with an explicit
3369     * MIME data type.  This method should very rarely be used -- it allows you
3370     * to override the MIME type that would ordinarily be inferred from the
3371     * data with your own type given here.
3372     *
3373     * <p><em>Note: MIME type, Uri scheme, and host name matching in the
3374     * Android framework is case-sensitive, unlike the formal RFC definitions.
3375     * As a result, you should always write these elements with lower case letters,
3376     * and normalize any MIME types or Uris you receive from
3377     * outside of Android to ensure these elements are lower case before
3378     * supplying them here.</em></p>
3379     *
3380     * @param data The URI of the data this intent is now targeting.
3381     * @param type The MIME type of the data being handled by this intent.
3382     *
3383     * @return Returns the same Intent object, for chaining multiple calls
3384     * into a single statement.
3385     *
3386     * @see #setData
3387     * @see #setType
3388     */
3389    public Intent setDataAndType(Uri data, String type) {
3390        mData = data;
3391        mType = type;
3392        return this;
3393    }
3394
3395    /**
3396     * Add a new category to the intent.  Categories provide additional detail
3397     * about the action the intent is perform.  When resolving an intent, only
3398     * activities that provide <em>all</em> of the requested categories will be
3399     * used.
3400     *
3401     * @param category The desired category.  This can be either one of the
3402     *               predefined Intent categories, or a custom category in your own
3403     *               namespace.
3404     *
3405     * @return Returns the same Intent object, for chaining multiple calls
3406     * into a single statement.
3407     *
3408     * @see #hasCategory
3409     * @see #removeCategory
3410     */
3411    public Intent addCategory(String category) {
3412        if (mCategories == null) {
3413            mCategories = new HashSet<String>();
3414        }
3415        mCategories.add(category);
3416        return this;
3417    }
3418
3419    /**
3420     * Remove an category from an intent.
3421     *
3422     * @param category The category to remove.
3423     *
3424     * @see #addCategory
3425     */
3426    public void removeCategory(String category) {
3427        if (mCategories != null) {
3428            mCategories.remove(category);
3429            if (mCategories.size() == 0) {
3430                mCategories = null;
3431            }
3432        }
3433    }
3434
3435    /**
3436     * Add extended data to the intent.  The name must include a package
3437     * prefix, for example the app com.android.contacts would use names
3438     * like "com.android.contacts.ShowAll".
3439     *
3440     * @param name The name of the extra data, with package prefix.
3441     * @param value The boolean data value.
3442     *
3443     * @return Returns the same Intent object, for chaining multiple calls
3444     * into a single statement.
3445     *
3446     * @see #putExtras
3447     * @see #removeExtra
3448     * @see #getBooleanExtra(String, boolean)
3449     */
3450    public Intent putExtra(String name, boolean value) {
3451        if (mExtras == null) {
3452            mExtras = new Bundle();
3453        }
3454        mExtras.putBoolean(name, value);
3455        return this;
3456    }
3457
3458    /**
3459     * Add extended data to the intent.  The name must include a package
3460     * prefix, for example the app com.android.contacts would use names
3461     * like "com.android.contacts.ShowAll".
3462     *
3463     * @param name The name of the extra data, with package prefix.
3464     * @param value The byte data value.
3465     *
3466     * @return Returns the same Intent object, for chaining multiple calls
3467     * into a single statement.
3468     *
3469     * @see #putExtras
3470     * @see #removeExtra
3471     * @see #getByteExtra(String, byte)
3472     */
3473    public Intent putExtra(String name, byte value) {
3474        if (mExtras == null) {
3475            mExtras = new Bundle();
3476        }
3477        mExtras.putByte(name, value);
3478        return this;
3479    }
3480
3481    /**
3482     * Add extended data to the intent.  The name must include a package
3483     * prefix, for example the app com.android.contacts would use names
3484     * like "com.android.contacts.ShowAll".
3485     *
3486     * @param name The name of the extra data, with package prefix.
3487     * @param value The char data value.
3488     *
3489     * @return Returns the same Intent object, for chaining multiple calls
3490     * into a single statement.
3491     *
3492     * @see #putExtras
3493     * @see #removeExtra
3494     * @see #getCharExtra(String, char)
3495     */
3496    public Intent putExtra(String name, char value) {
3497        if (mExtras == null) {
3498            mExtras = new Bundle();
3499        }
3500        mExtras.putChar(name, value);
3501        return this;
3502    }
3503
3504    /**
3505     * Add extended data to the intent.  The name must include a package
3506     * prefix, for example the app com.android.contacts would use names
3507     * like "com.android.contacts.ShowAll".
3508     *
3509     * @param name The name of the extra data, with package prefix.
3510     * @param value The short data value.
3511     *
3512     * @return Returns the same Intent object, for chaining multiple calls
3513     * into a single statement.
3514     *
3515     * @see #putExtras
3516     * @see #removeExtra
3517     * @see #getShortExtra(String, short)
3518     */
3519    public Intent putExtra(String name, short value) {
3520        if (mExtras == null) {
3521            mExtras = new Bundle();
3522        }
3523        mExtras.putShort(name, value);
3524        return this;
3525    }
3526
3527    /**
3528     * Add extended data to the intent.  The name must include a package
3529     * prefix, for example the app com.android.contacts would use names
3530     * like "com.android.contacts.ShowAll".
3531     *
3532     * @param name The name of the extra data, with package prefix.
3533     * @param value The integer data value.
3534     *
3535     * @return Returns the same Intent object, for chaining multiple calls
3536     * into a single statement.
3537     *
3538     * @see #putExtras
3539     * @see #removeExtra
3540     * @see #getIntExtra(String, int)
3541     */
3542    public Intent putExtra(String name, int value) {
3543        if (mExtras == null) {
3544            mExtras = new Bundle();
3545        }
3546        mExtras.putInt(name, value);
3547        return this;
3548    }
3549
3550    /**
3551     * Add extended data to the intent.  The name must include a package
3552     * prefix, for example the app com.android.contacts would use names
3553     * like "com.android.contacts.ShowAll".
3554     *
3555     * @param name The name of the extra data, with package prefix.
3556     * @param value The long data value.
3557     *
3558     * @return Returns the same Intent object, for chaining multiple calls
3559     * into a single statement.
3560     *
3561     * @see #putExtras
3562     * @see #removeExtra
3563     * @see #getLongExtra(String, long)
3564     */
3565    public Intent putExtra(String name, long value) {
3566        if (mExtras == null) {
3567            mExtras = new Bundle();
3568        }
3569        mExtras.putLong(name, value);
3570        return this;
3571    }
3572
3573    /**
3574     * Add extended data to the intent.  The name must include a package
3575     * prefix, for example the app com.android.contacts would use names
3576     * like "com.android.contacts.ShowAll".
3577     *
3578     * @param name The name of the extra data, with package prefix.
3579     * @param value The float data value.
3580     *
3581     * @return Returns the same Intent object, for chaining multiple calls
3582     * into a single statement.
3583     *
3584     * @see #putExtras
3585     * @see #removeExtra
3586     * @see #getFloatExtra(String, float)
3587     */
3588    public Intent putExtra(String name, float value) {
3589        if (mExtras == null) {
3590            mExtras = new Bundle();
3591        }
3592        mExtras.putFloat(name, value);
3593        return this;
3594    }
3595
3596    /**
3597     * Add extended data to the intent.  The name must include a package
3598     * prefix, for example the app com.android.contacts would use names
3599     * like "com.android.contacts.ShowAll".
3600     *
3601     * @param name The name of the extra data, with package prefix.
3602     * @param value The double data value.
3603     *
3604     * @return Returns the same Intent object, for chaining multiple calls
3605     * into a single statement.
3606     *
3607     * @see #putExtras
3608     * @see #removeExtra
3609     * @see #getDoubleExtra(String, double)
3610     */
3611    public Intent putExtra(String name, double value) {
3612        if (mExtras == null) {
3613            mExtras = new Bundle();
3614        }
3615        mExtras.putDouble(name, value);
3616        return this;
3617    }
3618
3619    /**
3620     * Add extended data to the intent.  The name must include a package
3621     * prefix, for example the app com.android.contacts would use names
3622     * like "com.android.contacts.ShowAll".
3623     *
3624     * @param name The name of the extra data, with package prefix.
3625     * @param value The String data value.
3626     *
3627     * @return Returns the same Intent object, for chaining multiple calls
3628     * into a single statement.
3629     *
3630     * @see #putExtras
3631     * @see #removeExtra
3632     * @see #getStringExtra(String)
3633     */
3634    public Intent putExtra(String name, String value) {
3635        if (mExtras == null) {
3636            mExtras = new Bundle();
3637        }
3638        mExtras.putString(name, value);
3639        return this;
3640    }
3641
3642    /**
3643     * Add extended data to the intent.  The name must include a package
3644     * prefix, for example the app com.android.contacts would use names
3645     * like "com.android.contacts.ShowAll".
3646     *
3647     * @param name The name of the extra data, with package prefix.
3648     * @param value The CharSequence data value.
3649     *
3650     * @return Returns the same Intent object, for chaining multiple calls
3651     * into a single statement.
3652     *
3653     * @see #putExtras
3654     * @see #removeExtra
3655     * @see #getCharSequenceExtra(String)
3656     */
3657    public Intent putExtra(String name, CharSequence value) {
3658        if (mExtras == null) {
3659            mExtras = new Bundle();
3660        }
3661        mExtras.putCharSequence(name, value);
3662        return this;
3663    }
3664
3665    /**
3666     * Add extended data to the intent.  The name must include a package
3667     * prefix, for example the app com.android.contacts would use names
3668     * like "com.android.contacts.ShowAll".
3669     *
3670     * @param name The name of the extra data, with package prefix.
3671     * @param value The Parcelable data value.
3672     *
3673     * @return Returns the same Intent object, for chaining multiple calls
3674     * into a single statement.
3675     *
3676     * @see #putExtras
3677     * @see #removeExtra
3678     * @see #getParcelableExtra(String)
3679     */
3680    public Intent putExtra(String name, Parcelable value) {
3681        if (mExtras == null) {
3682            mExtras = new Bundle();
3683        }
3684        mExtras.putParcelable(name, value);
3685        return this;
3686    }
3687
3688    /**
3689     * Add extended data to the intent.  The name must include a package
3690     * prefix, for example the app com.android.contacts would use names
3691     * like "com.android.contacts.ShowAll".
3692     *
3693     * @param name The name of the extra data, with package prefix.
3694     * @param value The Parcelable[] data value.
3695     *
3696     * @return Returns the same Intent object, for chaining multiple calls
3697     * into a single statement.
3698     *
3699     * @see #putExtras
3700     * @see #removeExtra
3701     * @see #getParcelableArrayExtra(String)
3702     */
3703    public Intent putExtra(String name, Parcelable[] value) {
3704        if (mExtras == null) {
3705            mExtras = new Bundle();
3706        }
3707        mExtras.putParcelableArray(name, value);
3708        return this;
3709    }
3710
3711    /**
3712     * Add extended data to the intent.  The name must include a package
3713     * prefix, for example the app com.android.contacts would use names
3714     * like "com.android.contacts.ShowAll".
3715     *
3716     * @param name The name of the extra data, with package prefix.
3717     * @param value The ArrayList<Parcelable> data value.
3718     *
3719     * @return Returns the same Intent object, for chaining multiple calls
3720     * into a single statement.
3721     *
3722     * @see #putExtras
3723     * @see #removeExtra
3724     * @see #getParcelableArrayListExtra(String)
3725     */
3726    public Intent putParcelableArrayListExtra(String name, ArrayList<? extends Parcelable> value) {
3727        if (mExtras == null) {
3728            mExtras = new Bundle();
3729        }
3730        mExtras.putParcelableArrayList(name, value);
3731        return this;
3732    }
3733
3734    /**
3735     * Add extended data to the intent.  The name must include a package
3736     * prefix, for example the app com.android.contacts would use names
3737     * like "com.android.contacts.ShowAll".
3738     *
3739     * @param name The name of the extra data, with package prefix.
3740     * @param value The ArrayList<Integer> data value.
3741     *
3742     * @return Returns the same Intent object, for chaining multiple calls
3743     * into a single statement.
3744     *
3745     * @see #putExtras
3746     * @see #removeExtra
3747     * @see #getIntegerArrayListExtra(String)
3748     */
3749    public Intent putIntegerArrayListExtra(String name, ArrayList<Integer> value) {
3750        if (mExtras == null) {
3751            mExtras = new Bundle();
3752        }
3753        mExtras.putIntegerArrayList(name, value);
3754        return this;
3755    }
3756
3757    /**
3758     * Add extended data to the intent.  The name must include a package
3759     * prefix, for example the app com.android.contacts would use names
3760     * like "com.android.contacts.ShowAll".
3761     *
3762     * @param name The name of the extra data, with package prefix.
3763     * @param value The ArrayList<String> data value.
3764     *
3765     * @return Returns the same Intent object, for chaining multiple calls
3766     * into a single statement.
3767     *
3768     * @see #putExtras
3769     * @see #removeExtra
3770     * @see #getStringArrayListExtra(String)
3771     */
3772    public Intent putStringArrayListExtra(String name, ArrayList<String> value) {
3773        if (mExtras == null) {
3774            mExtras = new Bundle();
3775        }
3776        mExtras.putStringArrayList(name, value);
3777        return this;
3778    }
3779
3780    /**
3781     * Add extended data to the intent.  The name must include a package
3782     * prefix, for example the app com.android.contacts would use names
3783     * like "com.android.contacts.ShowAll".
3784     *
3785     * @param name The name of the extra data, with package prefix.
3786     * @param value The Serializable data value.
3787     *
3788     * @return Returns the same Intent object, for chaining multiple calls
3789     * into a single statement.
3790     *
3791     * @see #putExtras
3792     * @see #removeExtra
3793     * @see #getSerializableExtra(String)
3794     */
3795    public Intent putExtra(String name, Serializable value) {
3796        if (mExtras == null) {
3797            mExtras = new Bundle();
3798        }
3799        mExtras.putSerializable(name, value);
3800        return this;
3801    }
3802
3803    /**
3804     * Add extended data to the intent.  The name must include a package
3805     * prefix, for example the app com.android.contacts would use names
3806     * like "com.android.contacts.ShowAll".
3807     *
3808     * @param name The name of the extra data, with package prefix.
3809     * @param value The boolean array data value.
3810     *
3811     * @return Returns the same Intent object, for chaining multiple calls
3812     * into a single statement.
3813     *
3814     * @see #putExtras
3815     * @see #removeExtra
3816     * @see #getBooleanArrayExtra(String)
3817     */
3818    public Intent putExtra(String name, boolean[] value) {
3819        if (mExtras == null) {
3820            mExtras = new Bundle();
3821        }
3822        mExtras.putBooleanArray(name, value);
3823        return this;
3824    }
3825
3826    /**
3827     * Add extended data to the intent.  The name must include a package
3828     * prefix, for example the app com.android.contacts would use names
3829     * like "com.android.contacts.ShowAll".
3830     *
3831     * @param name The name of the extra data, with package prefix.
3832     * @param value The byte array data value.
3833     *
3834     * @return Returns the same Intent object, for chaining multiple calls
3835     * into a single statement.
3836     *
3837     * @see #putExtras
3838     * @see #removeExtra
3839     * @see #getByteArrayExtra(String)
3840     */
3841    public Intent putExtra(String name, byte[] value) {
3842        if (mExtras == null) {
3843            mExtras = new Bundle();
3844        }
3845        mExtras.putByteArray(name, value);
3846        return this;
3847    }
3848
3849    /**
3850     * Add extended data to the intent.  The name must include a package
3851     * prefix, for example the app com.android.contacts would use names
3852     * like "com.android.contacts.ShowAll".
3853     *
3854     * @param name The name of the extra data, with package prefix.
3855     * @param value The short array data value.
3856     *
3857     * @return Returns the same Intent object, for chaining multiple calls
3858     * into a single statement.
3859     *
3860     * @see #putExtras
3861     * @see #removeExtra
3862     * @see #getShortArrayExtra(String)
3863     */
3864    public Intent putExtra(String name, short[] value) {
3865        if (mExtras == null) {
3866            mExtras = new Bundle();
3867        }
3868        mExtras.putShortArray(name, value);
3869        return this;
3870    }
3871
3872    /**
3873     * Add extended data to the intent.  The name must include a package
3874     * prefix, for example the app com.android.contacts would use names
3875     * like "com.android.contacts.ShowAll".
3876     *
3877     * @param name The name of the extra data, with package prefix.
3878     * @param value The char array data value.
3879     *
3880     * @return Returns the same Intent object, for chaining multiple calls
3881     * into a single statement.
3882     *
3883     * @see #putExtras
3884     * @see #removeExtra
3885     * @see #getCharArrayExtra(String)
3886     */
3887    public Intent putExtra(String name, char[] value) {
3888        if (mExtras == null) {
3889            mExtras = new Bundle();
3890        }
3891        mExtras.putCharArray(name, value);
3892        return this;
3893    }
3894
3895    /**
3896     * Add extended data to the intent.  The name must include a package
3897     * prefix, for example the app com.android.contacts would use names
3898     * like "com.android.contacts.ShowAll".
3899     *
3900     * @param name The name of the extra data, with package prefix.
3901     * @param value The int array data value.
3902     *
3903     * @return Returns the same Intent object, for chaining multiple calls
3904     * into a single statement.
3905     *
3906     * @see #putExtras
3907     * @see #removeExtra
3908     * @see #getIntArrayExtra(String)
3909     */
3910    public Intent putExtra(String name, int[] value) {
3911        if (mExtras == null) {
3912            mExtras = new Bundle();
3913        }
3914        mExtras.putIntArray(name, value);
3915        return this;
3916    }
3917
3918    /**
3919     * Add extended data to the intent.  The name must include a package
3920     * prefix, for example the app com.android.contacts would use names
3921     * like "com.android.contacts.ShowAll".
3922     *
3923     * @param name The name of the extra data, with package prefix.
3924     * @param value The byte array data value.
3925     *
3926     * @return Returns the same Intent object, for chaining multiple calls
3927     * into a single statement.
3928     *
3929     * @see #putExtras
3930     * @see #removeExtra
3931     * @see #getLongArrayExtra(String)
3932     */
3933    public Intent putExtra(String name, long[] value) {
3934        if (mExtras == null) {
3935            mExtras = new Bundle();
3936        }
3937        mExtras.putLongArray(name, value);
3938        return this;
3939    }
3940
3941    /**
3942     * Add extended data to the intent.  The name must include a package
3943     * prefix, for example the app com.android.contacts would use names
3944     * like "com.android.contacts.ShowAll".
3945     *
3946     * @param name The name of the extra data, with package prefix.
3947     * @param value The float array data value.
3948     *
3949     * @return Returns the same Intent object, for chaining multiple calls
3950     * into a single statement.
3951     *
3952     * @see #putExtras
3953     * @see #removeExtra
3954     * @see #getFloatArrayExtra(String)
3955     */
3956    public Intent putExtra(String name, float[] value) {
3957        if (mExtras == null) {
3958            mExtras = new Bundle();
3959        }
3960        mExtras.putFloatArray(name, value);
3961        return this;
3962    }
3963
3964    /**
3965     * Add extended data to the intent.  The name must include a package
3966     * prefix, for example the app com.android.contacts would use names
3967     * like "com.android.contacts.ShowAll".
3968     *
3969     * @param name The name of the extra data, with package prefix.
3970     * @param value The double array data value.
3971     *
3972     * @return Returns the same Intent object, for chaining multiple calls
3973     * into a single statement.
3974     *
3975     * @see #putExtras
3976     * @see #removeExtra
3977     * @see #getDoubleArrayExtra(String)
3978     */
3979    public Intent putExtra(String name, double[] value) {
3980        if (mExtras == null) {
3981            mExtras = new Bundle();
3982        }
3983        mExtras.putDoubleArray(name, value);
3984        return this;
3985    }
3986
3987    /**
3988     * Add extended data to the intent.  The name must include a package
3989     * prefix, for example the app com.android.contacts would use names
3990     * like "com.android.contacts.ShowAll".
3991     *
3992     * @param name The name of the extra data, with package prefix.
3993     * @param value The String array data value.
3994     *
3995     * @return Returns the same Intent object, for chaining multiple calls
3996     * into a single statement.
3997     *
3998     * @see #putExtras
3999     * @see #removeExtra
4000     * @see #getStringArrayExtra(String)
4001     */
4002    public Intent putExtra(String name, String[] value) {
4003        if (mExtras == null) {
4004            mExtras = new Bundle();
4005        }
4006        mExtras.putStringArray(name, value);
4007        return this;
4008    }
4009
4010    /**
4011     * Add extended data to the intent.  The name must include a package
4012     * prefix, for example the app com.android.contacts would use names
4013     * like "com.android.contacts.ShowAll".
4014     *
4015     * @param name The name of the extra data, with package prefix.
4016     * @param value The Bundle data value.
4017     *
4018     * @return Returns the same Intent object, for chaining multiple calls
4019     * into a single statement.
4020     *
4021     * @see #putExtras
4022     * @see #removeExtra
4023     * @see #getBundleExtra(String)
4024     */
4025    public Intent putExtra(String name, Bundle value) {
4026        if (mExtras == null) {
4027            mExtras = new Bundle();
4028        }
4029        mExtras.putBundle(name, value);
4030        return this;
4031    }
4032
4033    /**
4034     * Add extended data to the intent.  The name must include a package
4035     * prefix, for example the app com.android.contacts would use names
4036     * like "com.android.contacts.ShowAll".
4037     *
4038     * @param name The name of the extra data, with package prefix.
4039     * @param value The IBinder data value.
4040     *
4041     * @return Returns the same Intent object, for chaining multiple calls
4042     * into a single statement.
4043     *
4044     * @see #putExtras
4045     * @see #removeExtra
4046     * @see #getIBinderExtra(String)
4047     *
4048     * @deprecated
4049     * @hide
4050     */
4051    @Deprecated
4052    public Intent putExtra(String name, IBinder value) {
4053        if (mExtras == null) {
4054            mExtras = new Bundle();
4055        }
4056        mExtras.putIBinder(name, value);
4057        return this;
4058    }
4059
4060    /**
4061     * Copy all extras in 'src' in to this intent.
4062     *
4063     * @param src Contains the extras to copy.
4064     *
4065     * @see #putExtra
4066     */
4067    public Intent putExtras(Intent src) {
4068        if (src.mExtras != null) {
4069            if (mExtras == null) {
4070                mExtras = new Bundle(src.mExtras);
4071            } else {
4072                mExtras.putAll(src.mExtras);
4073            }
4074        }
4075        return this;
4076    }
4077
4078    /**
4079     * Add a set of extended data to the intent.  The keys must include a package
4080     * prefix, for example the app com.android.contacts would use names
4081     * like "com.android.contacts.ShowAll".
4082     *
4083     * @param extras The Bundle of extras to add to this intent.
4084     *
4085     * @see #putExtra
4086     * @see #removeExtra
4087     */
4088    public Intent putExtras(Bundle extras) {
4089        if (mExtras == null) {
4090            mExtras = new Bundle();
4091        }
4092        mExtras.putAll(extras);
4093        return this;
4094    }
4095
4096    /**
4097     * Completely replace the extras in the Intent with the extras in the
4098     * given Intent.
4099     *
4100     * @param src The exact extras contained in this Intent are copied
4101     * into the target intent, replacing any that were previously there.
4102     */
4103    public Intent replaceExtras(Intent src) {
4104        mExtras = src.mExtras != null ? new Bundle(src.mExtras) : null;
4105        return this;
4106    }
4107
4108    /**
4109     * Completely replace the extras in the Intent with the given Bundle of
4110     * extras.
4111     *
4112     * @param extras The new set of extras in the Intent, or null to erase
4113     * all extras.
4114     */
4115    public Intent replaceExtras(Bundle extras) {
4116        mExtras = extras != null ? new Bundle(extras) : null;
4117        return this;
4118    }
4119
4120    /**
4121     * Remove extended data from the intent.
4122     *
4123     * @see #putExtra
4124     */
4125    public void removeExtra(String name) {
4126        if (mExtras != null) {
4127            mExtras.remove(name);
4128            if (mExtras.size() == 0) {
4129                mExtras = null;
4130            }
4131        }
4132    }
4133
4134    /**
4135     * Set special flags controlling how this intent is handled.  Most values
4136     * here depend on the type of component being executed by the Intent,
4137     * specifically the FLAG_ACTIVITY_* flags are all for use with
4138     * {@link Context#startActivity Context.startActivity()} and the
4139     * FLAG_RECEIVER_* flags are all for use with
4140     * {@link Context#sendBroadcast(Intent) Context.sendBroadcast()}.
4141     *
4142     * <p>See the <a href="{@docRoot}guide/topics/fundamentals.html#acttask">Application Fundamentals:
4143     * Activities and Tasks</a> documentation for important information on how some of these options impact
4144     * the behavior of your application.
4145     *
4146     * @param flags The desired flags.
4147     *
4148     * @return Returns the same Intent object, for chaining multiple calls
4149     * into a single statement.
4150     *
4151     * @see #getFlags
4152     * @see #addFlags
4153     *
4154     * @see #FLAG_GRANT_READ_URI_PERMISSION
4155     * @see #FLAG_GRANT_WRITE_URI_PERMISSION
4156     * @see #FLAG_DEBUG_LOG_RESOLUTION
4157     * @see #FLAG_FROM_BACKGROUND
4158     * @see #FLAG_ACTIVITY_BROUGHT_TO_FRONT
4159     * @see #FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET
4160     * @see #FLAG_ACTIVITY_CLEAR_TOP
4161     * @see #FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS
4162     * @see #FLAG_ACTIVITY_FORWARD_RESULT
4163     * @see #FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY
4164     * @see #FLAG_ACTIVITY_MULTIPLE_TASK
4165     * @see #FLAG_ACTIVITY_NEW_TASK
4166     * @see #FLAG_ACTIVITY_NO_HISTORY
4167     * @see #FLAG_ACTIVITY_NO_USER_ACTION
4168     * @see #FLAG_ACTIVITY_PREVIOUS_IS_TOP
4169     * @see #FLAG_ACTIVITY_RESET_TASK_IF_NEEDED
4170     * @see #FLAG_ACTIVITY_SINGLE_TOP
4171     * @see #FLAG_RECEIVER_REGISTERED_ONLY
4172     */
4173    public Intent setFlags(int flags) {
4174        mFlags = flags;
4175        return this;
4176    }
4177
4178    /**
4179     * Add additional flags to the intent (or with existing flags
4180     * value).
4181     *
4182     * @param flags The new flags to set.
4183     *
4184     * @return Returns the same Intent object, for chaining multiple calls
4185     * into a single statement.
4186     *
4187     * @see #setFlags
4188     */
4189    public Intent addFlags(int flags) {
4190        mFlags |= flags;
4191        return this;
4192    }
4193
4194    /**
4195     * (Usually optional) Set an explicit application package name that limits
4196     * the components this Intent will resolve to.  If left to the default
4197     * value of null, all components in all applications will considered.
4198     * If non-null, the Intent can only match the components in the given
4199     * application package.
4200     *
4201     * @param packageName The name of the application package to handle the
4202     * intent, or null to allow any application package.
4203     *
4204     * @return Returns the same Intent object, for chaining multiple calls
4205     * into a single statement.
4206     *
4207     * @see #getPackage
4208     * @see #resolveActivity
4209     */
4210    public Intent setPackage(String packageName) {
4211        mPackage = packageName;
4212        return this;
4213    }
4214
4215    /**
4216     * (Usually optional) Explicitly set the component to handle the intent.
4217     * If left with the default value of null, the system will determine the
4218     * appropriate class to use based on the other fields (action, data,
4219     * type, categories) in the Intent.  If this class is defined, the
4220     * specified class will always be used regardless of the other fields.  You
4221     * should only set this value when you know you absolutely want a specific
4222     * class to be used; otherwise it is better to let the system find the
4223     * appropriate class so that you will respect the installed applications
4224     * and user preferences.
4225     *
4226     * @param component The name of the application component to handle the
4227     * intent, or null to let the system find one for you.
4228     *
4229     * @return Returns the same Intent object, for chaining multiple calls
4230     * into a single statement.
4231     *
4232     * @see #setClass
4233     * @see #setClassName(Context, String)
4234     * @see #setClassName(String, String)
4235     * @see #getComponent
4236     * @see #resolveActivity
4237     */
4238    public Intent setComponent(ComponentName component) {
4239        mComponent = component;
4240        return this;
4241    }
4242
4243    /**
4244     * Convenience for calling {@link #setComponent} with an
4245     * explicit class name.
4246     *
4247     * @param packageContext A Context of the application package implementing
4248     * this class.
4249     * @param className The name of a class inside of the application package
4250     * that will be used as the component for this Intent.
4251     *
4252     * @return Returns the same Intent object, for chaining multiple calls
4253     * into a single statement.
4254     *
4255     * @see #setComponent
4256     * @see #setClass
4257     */
4258    public Intent setClassName(Context packageContext, String className) {
4259        mComponent = new ComponentName(packageContext, className);
4260        return this;
4261    }
4262
4263    /**
4264     * Convenience for calling {@link #setComponent} with an
4265     * explicit application package name and class name.
4266     *
4267     * @param packageName The name of the package implementing the desired
4268     * component.
4269     * @param className The name of a class inside of the application package
4270     * that will be used as the component for this Intent.
4271     *
4272     * @return Returns the same Intent object, for chaining multiple calls
4273     * into a single statement.
4274     *
4275     * @see #setComponent
4276     * @see #setClass
4277     */
4278    public Intent setClassName(String packageName, String className) {
4279        mComponent = new ComponentName(packageName, className);
4280        return this;
4281    }
4282
4283    /**
4284     * Convenience for calling {@link #setComponent(ComponentName)} with the
4285     * name returned by a {@link Class} object.
4286     *
4287     * @param packageContext A Context of the application package implementing
4288     * this class.
4289     * @param cls The class name to set, equivalent to
4290     *            <code>setClassName(context, cls.getName())</code>.
4291     *
4292     * @return Returns the same Intent object, for chaining multiple calls
4293     * into a single statement.
4294     *
4295     * @see #setComponent
4296     */
4297    public Intent setClass(Context packageContext, Class<?> cls) {
4298        mComponent = new ComponentName(packageContext, cls);
4299        return this;
4300    }
4301
4302    /**
4303     * Use with {@link #fillIn} to allow the current action value to be
4304     * overwritten, even if it is already set.
4305     */
4306    public static final int FILL_IN_ACTION = 1<<0;
4307
4308    /**
4309     * Use with {@link #fillIn} to allow the current data or type value
4310     * overwritten, even if it is already set.
4311     */
4312    public static final int FILL_IN_DATA = 1<<1;
4313
4314    /**
4315     * Use with {@link #fillIn} to allow the current categories to be
4316     * overwritten, even if they are already set.
4317     */
4318    public static final int FILL_IN_CATEGORIES = 1<<2;
4319
4320    /**
4321     * Use with {@link #fillIn} to allow the current component value to be
4322     * overwritten, even if it is already set.
4323     */
4324    public static final int FILL_IN_COMPONENT = 1<<3;
4325
4326    /**
4327     * Use with {@link #fillIn} to allow the current package value to be
4328     * overwritten, even if it is already set.
4329     */
4330    public static final int FILL_IN_PACKAGE = 1<<4;
4331
4332    /**
4333     * Copy the contents of <var>other</var> in to this object, but only
4334     * where fields are not defined by this object.  For purposes of a field
4335     * being defined, the following pieces of data in the Intent are
4336     * considered to be separate fields:
4337     *
4338     * <ul>
4339     * <li> action, as set by {@link #setAction}.
4340     * <li> data URI and MIME type, as set by {@link #setData(Uri)},
4341     * {@link #setType(String)}, or {@link #setDataAndType(Uri, String)}.
4342     * <li> categories, as set by {@link #addCategory}.
4343     * <li> package, as set by {@link #setPackage}.
4344     * <li> component, as set by {@link #setComponent(ComponentName)} or
4345     * related methods.
4346     * <li> each top-level name in the associated extras.
4347     * </ul>
4348     *
4349     * <p>In addition, you can use the {@link #FILL_IN_ACTION},
4350     * {@link #FILL_IN_DATA}, {@link #FILL_IN_CATEGORIES}, {@link #FILL_IN_PACKAGE},
4351     * and {@link #FILL_IN_COMPONENT} to override the restriction where the
4352     * corresponding field will not be replaced if it is already set.
4353     *
4354     * <p>For example, consider Intent A with {data="foo", categories="bar"}
4355     * and Intent B with {action="gotit", data-type="some/thing",
4356     * categories="one","two"}.
4357     *
4358     * <p>Calling A.fillIn(B, Intent.FILL_IN_DATA) will result in A now
4359     * containing: {action="gotit", data-type="some/thing",
4360     * categories="bar"}.
4361     *
4362     * @param other Another Intent whose values are to be used to fill in
4363     * the current one.
4364     * @param flags Options to control which fields can be filled in.
4365     *
4366     * @return Returns a bit mask of {@link #FILL_IN_ACTION},
4367     * {@link #FILL_IN_DATA}, {@link #FILL_IN_CATEGORIES}, {@link #FILL_IN_PACKAGE},
4368     * and {@link #FILL_IN_COMPONENT} indicating which fields were changed.
4369     */
4370    public int fillIn(Intent other, int flags) {
4371        int changes = 0;
4372        if (other.mAction != null
4373                && (mAction == null || (flags&FILL_IN_ACTION) != 0)) {
4374            mAction = other.mAction;
4375            changes |= FILL_IN_ACTION;
4376        }
4377        if ((other.mData != null || other.mType != null)
4378                && ((mData == null && mType == null)
4379                        || (flags&FILL_IN_DATA) != 0)) {
4380            mData = other.mData;
4381            mType = other.mType;
4382            changes |= FILL_IN_DATA;
4383        }
4384        if (other.mCategories != null
4385                && (mCategories == null || (flags&FILL_IN_CATEGORIES) != 0)) {
4386            if (other.mCategories != null) {
4387                mCategories = new HashSet<String>(other.mCategories);
4388            }
4389            changes |= FILL_IN_CATEGORIES;
4390        }
4391        if (other.mPackage != null
4392                && (mPackage == null || (flags&FILL_IN_PACKAGE) != 0)) {
4393            mPackage = other.mPackage;
4394            changes |= FILL_IN_PACKAGE;
4395        }
4396        // Component is special: it can -only- be set if explicitly allowed,
4397        // since otherwise the sender could force the intent somewhere the
4398        // originator didn't intend.
4399        if (other.mComponent != null && (flags&FILL_IN_COMPONENT) != 0) {
4400            mComponent = other.mComponent;
4401            changes |= FILL_IN_COMPONENT;
4402        }
4403        mFlags |= other.mFlags;
4404        if (mExtras == null) {
4405            if (other.mExtras != null) {
4406                mExtras = new Bundle(other.mExtras);
4407            }
4408        } else if (other.mExtras != null) {
4409            try {
4410                Bundle newb = new Bundle(other.mExtras);
4411                newb.putAll(mExtras);
4412                mExtras = newb;
4413            } catch (RuntimeException e) {
4414                // Modifying the extras can cause us to unparcel the contents
4415                // of the bundle, and if we do this in the system process that
4416                // may fail.  We really should handle this (i.e., the Bundle
4417                // impl shouldn't be on top of a plain map), but for now just
4418                // ignore it and keep the original contents. :(
4419                Log.w("Intent", "Failure filling in extras", e);
4420            }
4421        }
4422        return changes;
4423    }
4424
4425    /**
4426     * Wrapper class holding an Intent and implementing comparisons on it for
4427     * the purpose of filtering.  The class implements its
4428     * {@link #equals equals()} and {@link #hashCode hashCode()} methods as
4429     * simple calls to {@link Intent#filterEquals(Intent)}  filterEquals()} and
4430     * {@link android.content.Intent#filterHashCode()}  filterHashCode()}
4431     * on the wrapped Intent.
4432     */
4433    public static final class FilterComparison {
4434        private final Intent mIntent;
4435        private final int mHashCode;
4436
4437        public FilterComparison(Intent intent) {
4438            mIntent = intent;
4439            mHashCode = intent.filterHashCode();
4440        }
4441
4442        /**
4443         * Return the Intent that this FilterComparison represents.
4444         * @return Returns the Intent held by the FilterComparison.  Do
4445         * not modify!
4446         */
4447        public Intent getIntent() {
4448            return mIntent;
4449        }
4450
4451        @Override
4452        public boolean equals(Object obj) {
4453            if (obj instanceof FilterComparison) {
4454                Intent other = ((FilterComparison)obj).mIntent;
4455                return mIntent.filterEquals(other);
4456            }
4457            return false;
4458        }
4459
4460        @Override
4461        public int hashCode() {
4462            return mHashCode;
4463        }
4464    }
4465
4466    /**
4467     * Determine if two intents are the same for the purposes of intent
4468     * resolution (filtering). That is, if their action, data, type,
4469     * class, and categories are the same.  This does <em>not</em> compare
4470     * any extra data included in the intents.
4471     *
4472     * @param other The other Intent to compare against.
4473     *
4474     * @return Returns true if action, data, type, class, and categories
4475     *         are the same.
4476     */
4477    public boolean filterEquals(Intent other) {
4478        if (other == null) {
4479            return false;
4480        }
4481        if (mAction != other.mAction) {
4482            if (mAction != null) {
4483                if (!mAction.equals(other.mAction)) {
4484                    return false;
4485                }
4486            } else {
4487                if (!other.mAction.equals(mAction)) {
4488                    return false;
4489                }
4490            }
4491        }
4492        if (mData != other.mData) {
4493            if (mData != null) {
4494                if (!mData.equals(other.mData)) {
4495                    return false;
4496                }
4497            } else {
4498                if (!other.mData.equals(mData)) {
4499                    return false;
4500                }
4501            }
4502        }
4503        if (mType != other.mType) {
4504            if (mType != null) {
4505                if (!mType.equals(other.mType)) {
4506                    return false;
4507                }
4508            } else {
4509                if (!other.mType.equals(mType)) {
4510                    return false;
4511                }
4512            }
4513        }
4514        if (mPackage != other.mPackage) {
4515            if (mPackage != null) {
4516                if (!mPackage.equals(other.mPackage)) {
4517                    return false;
4518                }
4519            } else {
4520                if (!other.mPackage.equals(mPackage)) {
4521                    return false;
4522                }
4523            }
4524        }
4525        if (mComponent != other.mComponent) {
4526            if (mComponent != null) {
4527                if (!mComponent.equals(other.mComponent)) {
4528                    return false;
4529                }
4530            } else {
4531                if (!other.mComponent.equals(mComponent)) {
4532                    return false;
4533                }
4534            }
4535        }
4536        if (mCategories != other.mCategories) {
4537            if (mCategories != null) {
4538                if (!mCategories.equals(other.mCategories)) {
4539                    return false;
4540                }
4541            } else {
4542                if (!other.mCategories.equals(mCategories)) {
4543                    return false;
4544                }
4545            }
4546        }
4547
4548        return true;
4549    }
4550
4551    /**
4552     * Generate hash code that matches semantics of filterEquals().
4553     *
4554     * @return Returns the hash value of the action, data, type, class, and
4555     *         categories.
4556     *
4557     * @see #filterEquals
4558     */
4559    public int filterHashCode() {
4560        int code = 0;
4561        if (mAction != null) {
4562            code += mAction.hashCode();
4563        }
4564        if (mData != null) {
4565            code += mData.hashCode();
4566        }
4567        if (mType != null) {
4568            code += mType.hashCode();
4569        }
4570        if (mPackage != null) {
4571            code += mPackage.hashCode();
4572        }
4573        if (mComponent != null) {
4574            code += mComponent.hashCode();
4575        }
4576        if (mCategories != null) {
4577            code += mCategories.hashCode();
4578        }
4579        return code;
4580    }
4581
4582    @Override
4583    public String toString() {
4584        StringBuilder   b = new StringBuilder(128);
4585
4586        b.append("Intent { ");
4587        toShortString(b, true, true);
4588        b.append(" }");
4589
4590        return b.toString();
4591    }
4592
4593    /** @hide */
4594    public String toShortString(boolean comp, boolean extras) {
4595        StringBuilder   b = new StringBuilder(128);
4596        toShortString(b, comp, extras);
4597        return b.toString();
4598    }
4599
4600    /** @hide */
4601    public void toShortString(StringBuilder b, boolean comp, boolean extras) {
4602        boolean first = true;
4603        if (mAction != null) {
4604            b.append("act=").append(mAction);
4605            first = false;
4606        }
4607        if (mCategories != null) {
4608            if (!first) {
4609                b.append(' ');
4610            }
4611            first = false;
4612            b.append("cat=[");
4613            Iterator<String> i = mCategories.iterator();
4614            boolean didone = false;
4615            while (i.hasNext()) {
4616                if (didone) b.append(",");
4617                didone = true;
4618                b.append(i.next());
4619            }
4620            b.append("]");
4621        }
4622        if (mData != null) {
4623            if (!first) {
4624                b.append(' ');
4625            }
4626            first = false;
4627            b.append("dat=").append(mData);
4628        }
4629        if (mType != null) {
4630            if (!first) {
4631                b.append(' ');
4632            }
4633            first = false;
4634            b.append("typ=").append(mType);
4635        }
4636        if (mFlags != 0) {
4637            if (!first) {
4638                b.append(' ');
4639            }
4640            first = false;
4641            b.append("flg=0x").append(Integer.toHexString(mFlags));
4642        }
4643        if (mPackage != null) {
4644            if (!first) {
4645                b.append(' ');
4646            }
4647            first = false;
4648            b.append("pkg=").append(mPackage);
4649        }
4650        if (comp && mComponent != null) {
4651            if (!first) {
4652                b.append(' ');
4653            }
4654            first = false;
4655            b.append("cmp=").append(mComponent.flattenToShortString());
4656        }
4657        if (extras && mExtras != null) {
4658            if (!first) {
4659                b.append(' ');
4660            }
4661            first = false;
4662            b.append("(has extras)");
4663        }
4664    }
4665
4666    /**
4667     * Call {@link #toUri} with 0 flags.
4668     * @deprecated Use {@link #toUri} instead.
4669     */
4670    @Deprecated
4671    public String toURI() {
4672        return toUri(0);
4673    }
4674
4675    /**
4676     * Convert this Intent into a String holding a URI representation of it.
4677     * The returned URI string has been properly URI encoded, so it can be
4678     * used with {@link Uri#parse Uri.parse(String)}.  The URI contains the
4679     * Intent's data as the base URI, with an additional fragment describing
4680     * the action, categories, type, flags, package, component, and extras.
4681     *
4682     * <p>You can convert the returned string back to an Intent with
4683     * {@link #getIntent}.
4684     *
4685     * @param flags Additional operating flags.  Either 0 or
4686     * {@link #URI_INTENT_SCHEME}.
4687     *
4688     * @return Returns a URI encoding URI string describing the entire contents
4689     * of the Intent.
4690     */
4691    public String toUri(int flags) {
4692        StringBuilder uri = new StringBuilder(128);
4693        String scheme = null;
4694        if (mData != null) {
4695            String data = mData.toString();
4696            if ((flags&URI_INTENT_SCHEME) != 0) {
4697                final int N = data.length();
4698                for (int i=0; i<N; i++) {
4699                    char c = data.charAt(i);
4700                    if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
4701                            || c == '.' || c == '-') {
4702                        continue;
4703                    }
4704                    if (c == ':' && i > 0) {
4705                        // Valid scheme.
4706                        scheme = data.substring(0, i);
4707                        uri.append("intent:");
4708                        data = data.substring(i+1);
4709                        break;
4710                    }
4711
4712                    // No scheme.
4713                    break;
4714                }
4715            }
4716            uri.append(data);
4717
4718        } else if ((flags&URI_INTENT_SCHEME) != 0) {
4719            uri.append("intent:");
4720        }
4721
4722        uri.append("#Intent;");
4723
4724        if (scheme != null) {
4725            uri.append("scheme=").append(scheme).append(';');
4726        }
4727        if (mAction != null) {
4728            uri.append("action=").append(Uri.encode(mAction)).append(';');
4729        }
4730        if (mCategories != null) {
4731            for (String category : mCategories) {
4732                uri.append("category=").append(Uri.encode(category)).append(';');
4733            }
4734        }
4735        if (mType != null) {
4736            uri.append("type=").append(Uri.encode(mType, "/")).append(';');
4737        }
4738        if (mFlags != 0) {
4739            uri.append("launchFlags=0x").append(Integer.toHexString(mFlags)).append(';');
4740        }
4741        if (mPackage != null) {
4742            uri.append("package=").append(Uri.encode(mPackage)).append(';');
4743        }
4744        if (mComponent != null) {
4745            uri.append("component=").append(Uri.encode(
4746                    mComponent.flattenToShortString(), "/")).append(';');
4747        }
4748        if (mExtras != null) {
4749            for (String key : mExtras.keySet()) {
4750                final Object value = mExtras.get(key);
4751                char entryType =
4752                        value instanceof String    ? 'S' :
4753                        value instanceof Boolean   ? 'B' :
4754                        value instanceof Byte      ? 'b' :
4755                        value instanceof Character ? 'c' :
4756                        value instanceof Double    ? 'd' :
4757                        value instanceof Float     ? 'f' :
4758                        value instanceof Integer   ? 'i' :
4759                        value instanceof Long      ? 'l' :
4760                        value instanceof Short     ? 's' :
4761                        '\0';
4762
4763                if (entryType != '\0') {
4764                    uri.append(entryType);
4765                    uri.append('.');
4766                    uri.append(Uri.encode(key));
4767                    uri.append('=');
4768                    uri.append(Uri.encode(value.toString()));
4769                    uri.append(';');
4770                }
4771            }
4772        }
4773
4774        uri.append("end");
4775
4776        return uri.toString();
4777    }
4778
4779    public int describeContents() {
4780        return (mExtras != null) ? mExtras.describeContents() : 0;
4781    }
4782
4783    public void writeToParcel(Parcel out, int flags) {
4784        out.writeString(mAction);
4785        Uri.writeToParcel(out, mData);
4786        out.writeString(mType);
4787        out.writeInt(mFlags);
4788        out.writeString(mPackage);
4789        ComponentName.writeToParcel(mComponent, out);
4790
4791        if (mCategories != null) {
4792            out.writeInt(mCategories.size());
4793            for (String category : mCategories) {
4794                out.writeString(category);
4795            }
4796        } else {
4797            out.writeInt(0);
4798        }
4799
4800        out.writeBundle(mExtras);
4801    }
4802
4803    public static final Parcelable.Creator<Intent> CREATOR
4804            = new Parcelable.Creator<Intent>() {
4805        public Intent createFromParcel(Parcel in) {
4806            return new Intent(in);
4807        }
4808        public Intent[] newArray(int size) {
4809            return new Intent[size];
4810        }
4811    };
4812
4813    private Intent(Parcel in) {
4814        readFromParcel(in);
4815    }
4816
4817    public void readFromParcel(Parcel in) {
4818        mAction = in.readString();
4819        mData = Uri.CREATOR.createFromParcel(in);
4820        mType = in.readString();
4821        mFlags = in.readInt();
4822        mPackage = in.readString();
4823        mComponent = ComponentName.readFromParcel(in);
4824
4825        int N = in.readInt();
4826        if (N > 0) {
4827            mCategories = new HashSet<String>();
4828            int i;
4829            for (i=0; i<N; i++) {
4830                mCategories.add(in.readString());
4831            }
4832        } else {
4833            mCategories = null;
4834        }
4835
4836        mExtras = in.readBundle();
4837    }
4838
4839    /**
4840     * Parses the "intent" element (and its children) from XML and instantiates
4841     * an Intent object.  The given XML parser should be located at the tag
4842     * where parsing should start (often named "intent"), from which the
4843     * basic action, data, type, and package and class name will be
4844     * retrieved.  The function will then parse in to any child elements,
4845     * looking for <category android:name="xxx"> tags to add categories and
4846     * <extra android:name="xxx" android:value="yyy"> to attach extra data
4847     * to the intent.
4848     *
4849     * @param resources The Resources to use when inflating resources.
4850     * @param parser The XML parser pointing at an "intent" tag.
4851     * @param attrs The AttributeSet interface for retrieving extended
4852     * attribute data at the current <var>parser</var> location.
4853     * @return An Intent object matching the XML data.
4854     * @throws XmlPullParserException If there was an XML parsing error.
4855     * @throws IOException If there was an I/O error.
4856     */
4857    public static Intent parseIntent(Resources resources, XmlPullParser parser, AttributeSet attrs)
4858            throws XmlPullParserException, IOException {
4859        Intent intent = new Intent();
4860
4861        TypedArray sa = resources.obtainAttributes(attrs,
4862                com.android.internal.R.styleable.Intent);
4863
4864        intent.setAction(sa.getString(com.android.internal.R.styleable.Intent_action));
4865
4866        String data = sa.getString(com.android.internal.R.styleable.Intent_data);
4867        String mimeType = sa.getString(com.android.internal.R.styleable.Intent_mimeType);
4868        intent.setDataAndType(data != null ? Uri.parse(data) : null, mimeType);
4869
4870        String packageName = sa.getString(com.android.internal.R.styleable.Intent_targetPackage);
4871        String className = sa.getString(com.android.internal.R.styleable.Intent_targetClass);
4872        if (packageName != null && className != null) {
4873            intent.setComponent(new ComponentName(packageName, className));
4874        }
4875
4876        sa.recycle();
4877
4878        int outerDepth = parser.getDepth();
4879        int type;
4880        while ((type=parser.next()) != XmlPullParser.END_DOCUMENT
4881               && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
4882            if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) {
4883                continue;
4884            }
4885
4886            String nodeName = parser.getName();
4887            if (nodeName.equals("category")) {
4888                sa = resources.obtainAttributes(attrs,
4889                        com.android.internal.R.styleable.IntentCategory);
4890                String cat = sa.getString(com.android.internal.R.styleable.IntentCategory_name);
4891                sa.recycle();
4892
4893                if (cat != null) {
4894                    intent.addCategory(cat);
4895                }
4896                XmlUtils.skipCurrentTag(parser);
4897
4898            } else if (nodeName.equals("extra")) {
4899                if (intent.mExtras == null) {
4900                    intent.mExtras = new Bundle();
4901                }
4902                resources.parseBundleExtra("extra", attrs, intent.mExtras);
4903                XmlUtils.skipCurrentTag(parser);
4904
4905            } else {
4906                XmlUtils.skipCurrentTag(parser);
4907            }
4908        }
4909
4910        return intent;
4911    }
4912}
4913