KeyguardActivityLauncher.java revision 5ecd81154fa039961f65bb4e36d18ac555b0d1d6 
1/*
2 * Copyright (C) 2012 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 com.android.keyguard;
18
19import com.android.internal.widget.LockPatternUtils;
20
21import android.app.ActivityManagerNative;
22import android.app.ActivityOptions;
23import android.app.IActivityManager.WaitResult;
24import android.appwidget.AppWidgetManager;
25import android.appwidget.AppWidgetProviderInfo;
26import android.content.ActivityNotFoundException;
27import android.content.Context;
28import android.content.Intent;
29import android.content.pm.PackageManager;
30import android.content.pm.ResolveInfo;
31import android.os.Bundle;
32import android.os.Handler;
33import android.os.RemoteException;
34import android.os.SystemClock;
35import android.os.UserHandle;
36import android.provider.MediaStore;
37import android.util.Log;
38import android.view.WindowManager;
39
40import com.android.keyguard.KeyguardHostView.OnDismissAction;
41
42import java.util.List;
43
44public abstract class KeyguardActivityLauncher {
45    private static final String TAG = KeyguardActivityLauncher.class.getSimpleName();
46    private static final boolean DEBUG = KeyguardHostView.DEBUG;
47    private static final String META_DATA_KEYGUARD_LAYOUT = "com.android.keyguard.layout";
48    private static final Intent SECURE_CAMERA_INTENT =
49            new Intent(MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA_SECURE)
50                    .addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
51    private static final Intent INSECURE_CAMERA_INTENT =
52            new Intent(MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA);
53
54    abstract Context getContext();
55
56    abstract KeyguardSecurityCallback getCallback();
57
58    abstract LockPatternUtils getLockPatternUtils();
59
60    public static class CameraWidgetInfo {
61        public String contextPackage;
62        public int layoutId;
63    }
64
65    public CameraWidgetInfo getCameraWidgetInfo() {
66        CameraWidgetInfo info = new CameraWidgetInfo();
67        Intent intent = getCameraIntent();
68        PackageManager packageManager = getContext().getPackageManager();
69        final List<ResolveInfo> appList = packageManager.queryIntentActivitiesAsUser(
70                intent, PackageManager.MATCH_DEFAULT_ONLY, getLockPatternUtils().getCurrentUser());
71        if (appList.size() == 0) {
72            if (DEBUG) Log.d(TAG, "getCameraWidgetInfo(): Nothing found");
73            return null;
74        }
75        ResolveInfo resolved = packageManager.resolveActivityAsUser(intent,
76                PackageManager.MATCH_DEFAULT_ONLY | PackageManager.GET_META_DATA,
77                getLockPatternUtils().getCurrentUser());
78        if (DEBUG) Log.d(TAG, "getCameraWidgetInfo(): resolved: " + resolved);
79        if (wouldLaunchResolverActivity(resolved, appList)) {
80            if (DEBUG) Log.d(TAG, "getCameraWidgetInfo(): Would launch resolver");
81            return info;
82        }
83        if (resolved == null || resolved.activityInfo == null) {
84            return null;
85        }
86        if (resolved.activityInfo.metaData == null || resolved.activityInfo.metaData.isEmpty()) {
87            if (DEBUG) Log.d(TAG, "getCameraWidgetInfo(): no metadata found");
88            return info;
89        }
90        int layoutId = resolved.activityInfo.metaData.getInt(META_DATA_KEYGUARD_LAYOUT);
91        if (layoutId == 0) {
92            if (DEBUG) Log.d(TAG, "getCameraWidgetInfo(): no layout specified");
93            return info;
94        }
95        info.contextPackage = resolved.activityInfo.packageName;
96        info.layoutId = layoutId;
97        return info;
98    }
99
100    public void launchCamera(Handler worker, Runnable onSecureCameraStarted) {
101        LockPatternUtils lockPatternUtils = getLockPatternUtils();
102        if (lockPatternUtils.isSecure()) {
103            // Launch the secure version of the camera
104            if (wouldLaunchResolverActivity(SECURE_CAMERA_INTENT)) {
105                // TODO: Show disambiguation dialog instead.
106                // For now, we'll treat this like launching any other app from secure keyguard.
107                // When they do, user sees the system's ResolverActivity which lets them choose
108                // which secure camera to use.
109                launchActivity(SECURE_CAMERA_INTENT, false, false, null, null);
110            } else {
111                launchActivity(SECURE_CAMERA_INTENT, true, false, worker, onSecureCameraStarted);
112            }
113        } else {
114            // Launch the normal camera
115            launchActivity(INSECURE_CAMERA_INTENT, false, false, null, null);
116        }
117    }
118
119    public void launchWidgetPicker(int appWidgetId) {
120        Intent pickIntent = new Intent(AppWidgetManager.ACTION_KEYGUARD_APPWIDGET_PICK);
121
122        pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
123        pickIntent.putExtra(AppWidgetManager.EXTRA_CUSTOM_SORT, false);
124        pickIntent.putExtra(AppWidgetManager.EXTRA_CATEGORY_FILTER,
125                AppWidgetProviderInfo.WIDGET_CATEGORY_KEYGUARD);
126
127        Bundle options = new Bundle();
128        options.putInt(AppWidgetManager.OPTION_APPWIDGET_HOST_CATEGORY,
129                AppWidgetProviderInfo.WIDGET_CATEGORY_KEYGUARD);
130        pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_OPTIONS, options);
131        pickIntent.addFlags(
132                Intent.FLAG_ACTIVITY_NEW_TASK
133                | Intent.FLAG_ACTIVITY_SINGLE_TOP
134                | Intent.FLAG_ACTIVITY_CLEAR_TOP
135                | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
136
137        launchActivity(pickIntent, false, false, null, null);
138    }
139
140    /**
141     * Launches the said intent for the current foreground user.
142     *
143     * @param intent
144     * @param showsWhileLocked true if the activity can be run on top of keyguard.
145     *   See {@link WindowManager#FLAG_SHOW_WHEN_LOCKED}
146     * @param useDefaultAnimations true if default transitions should be used, else suppressed.
147     * @param worker if supplied along with onStarted, used to launch the blocking activity call.
148     * @param onStarted if supplied along with worker, called after activity is started.
149     */
150    public void launchActivity(final Intent intent,
151            boolean showsWhileLocked,
152            boolean useDefaultAnimations,
153            final Handler worker,
154            final Runnable onStarted) {
155
156        final Context context = getContext();
157        final Bundle animation = useDefaultAnimations ? null
158                : ActivityOptions.makeCustomAnimation(context, 0, 0).toBundle();
159        launchActivityWithAnimation(intent, showsWhileLocked, animation, worker, onStarted);
160    }
161
162    public void launchActivityWithAnimation(final Intent intent,
163            boolean showsWhileLocked,
164            final Bundle animation,
165            final Handler worker,
166            final Runnable onStarted) {
167
168        LockPatternUtils lockPatternUtils = getLockPatternUtils();
169        intent.addFlags(
170                Intent.FLAG_ACTIVITY_NEW_TASK
171                | Intent.FLAG_ACTIVITY_SINGLE_TOP
172                | Intent.FLAG_ACTIVITY_CLEAR_TOP);
173        boolean isSecure = lockPatternUtils.isSecure();
174        if (!isSecure || showsWhileLocked) {
175            if (!isSecure) {
176                dismissKeyguardOnNextActivity();
177            }
178            try {
179                if (DEBUG) Log.d(TAG, String.format("Starting activity for intent %s at %s",
180                        intent, SystemClock.uptimeMillis()));
181                startActivityForCurrentUser(intent, animation, worker, onStarted);
182            } catch (ActivityNotFoundException e) {
183                Log.w(TAG, "Activity not found for intent + " + intent.getAction());
184            }
185        } else {
186            // Create a runnable to start the activity and ask the user to enter their
187            // credentials.
188            KeyguardSecurityCallback callback = getCallback();
189            callback.setOnDismissAction(new OnDismissAction() {
190                @Override
191                public boolean onDismiss() {
192                    dismissKeyguardOnNextActivity();
193                    startActivityForCurrentUser(intent, animation, worker, onStarted);
194                    return true;
195                }
196            });
197            callback.dismiss(false);
198        }
199    }
200
201    private void dismissKeyguardOnNextActivity() {
202        try {
203            ActivityManagerNative.getDefault().dismissKeyguardOnNextActivity();
204        } catch (RemoteException e) {
205            Log.w(TAG, "can't dismiss keyguard on launch");
206        }
207    }
208
209    private void startActivityForCurrentUser(final Intent intent, final Bundle options,
210            Handler worker, final Runnable onStarted) {
211        final UserHandle user = new UserHandle(UserHandle.USER_CURRENT);
212        if (worker == null || onStarted == null) {
213            getContext().startActivityAsUser(intent, options, user);
214            return;
215        }
216        // if worker + onStarted are supplied, run blocking activity launch call in the background
217        worker.post(new Runnable(){
218            @Override
219            public void run() {
220                try {
221                    WaitResult result = ActivityManagerNative.getDefault().startActivityAndWait(
222                            null /*caller*/,
223                            null /*caller pkg*/,
224                            intent,
225                            intent.resolveTypeIfNeeded(getContext().getContentResolver()),
226                            null /*resultTo*/,
227                            null /*resultWho*/,
228                            0 /*requestCode*/,
229                            Intent.FLAG_ACTIVITY_NEW_TASK,
230                            null /*profileFile*/,
231                            null /*profileFd*/,
232                            options,
233                            user.getIdentifier());
234                    if (DEBUG) Log.d(TAG, String.format("waitResult[%s,%s,%s,%s] at %s",
235                            result.result, result.thisTime, result.totalTime, result.who,
236                            SystemClock.uptimeMillis()));
237                } catch (RemoteException e) {
238                    Log.w(TAG, "Error starting activity", e);
239                    return;
240                }
241                try {
242                    onStarted.run();
243                } catch (Throwable t) {
244                    Log.w(TAG, "Error running onStarted callback", t);
245                }
246            }});
247    }
248
249    private Intent getCameraIntent() {
250        return getLockPatternUtils().isSecure() ? SECURE_CAMERA_INTENT : INSECURE_CAMERA_INTENT;
251    }
252
253    private boolean wouldLaunchResolverActivity(Intent intent) {
254        PackageManager packageManager = getContext().getPackageManager();
255        ResolveInfo resolved = packageManager.resolveActivityAsUser(intent,
256                PackageManager.MATCH_DEFAULT_ONLY, getLockPatternUtils().getCurrentUser());
257        List<ResolveInfo> appList = packageManager.queryIntentActivitiesAsUser(
258                intent, PackageManager.MATCH_DEFAULT_ONLY, getLockPatternUtils().getCurrentUser());
259        return wouldLaunchResolverActivity(resolved, appList);
260    }
261
262    private boolean wouldLaunchResolverActivity(ResolveInfo resolved, List<ResolveInfo> appList) {
263        // If the list contains the above resolved activity, then it can't be
264        // ResolverActivity itself.
265        for (int i = 0; i < appList.size(); i++) {
266            ResolveInfo tmp = appList.get(i);
267            if (tmp.activityInfo.name.equals(resolved.activityInfo.name)
268                    && tmp.activityInfo.packageName.equals(resolved.activityInfo.packageName)) {
269                return false;
270            }
271        }
272        return true;
273    }
274}
275