1/* 2 * Copyright (C) 2007 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.preference; 18 19import android.app.Fragment; 20import android.app.FragmentBreadCrumbs; 21import android.app.FragmentManager; 22import android.app.FragmentTransaction; 23import android.app.ListActivity; 24import android.content.Context; 25import android.content.Intent; 26import android.content.res.Resources; 27import android.content.res.TypedArray; 28import android.content.res.XmlResourceParser; 29import android.os.Bundle; 30import android.os.Handler; 31import android.os.Message; 32import android.os.Parcel; 33import android.os.Parcelable; 34import android.text.TextUtils; 35import android.util.AttributeSet; 36import android.util.Log; 37import android.util.TypedValue; 38import android.util.Xml; 39import android.view.LayoutInflater; 40import android.view.View; 41import android.view.View.OnClickListener; 42import android.view.ViewGroup; 43import android.widget.AbsListView; 44import android.widget.ArrayAdapter; 45import android.widget.BaseAdapter; 46import android.widget.Button; 47import android.widget.FrameLayout; 48import android.widget.ImageView; 49import android.widget.ListView; 50import android.widget.TextView; 51 52import com.android.internal.util.XmlUtils; 53 54import org.xmlpull.v1.XmlPullParser; 55import org.xmlpull.v1.XmlPullParserException; 56 57import java.io.IOException; 58import java.util.ArrayList; 59import java.util.List; 60 61/** 62 * This is the base class for an activity to show a hierarchy of preferences 63 * to the user. Prior to {@link android.os.Build.VERSION_CODES#HONEYCOMB} 64 * this class only allowed the display of a single set of preference; this 65 * functionality should now be found in the new {@link PreferenceFragment} 66 * class. If you are using PreferenceActivity in its old mode, the documentation 67 * there applies to the deprecated APIs here. 68 * 69 * <p>This activity shows one or more headers of preferences, each of which 70 * is associated with a {@link PreferenceFragment} to display the preferences 71 * of that header. The actual layout and display of these associations can 72 * however vary; currently there are two major approaches it may take: 73 * 74 * <ul> 75 * <li>On a small screen it may display only the headers as a single list 76 * when first launched. Selecting one of the header items will re-launch 77 * the activity with it only showing the PreferenceFragment of that header. 78 * <li>On a large screen in may display both the headers and current 79 * PreferenceFragment together as panes. Selecting a header item switches 80 * to showing the correct PreferenceFragment for that item. 81 * </ul> 82 * 83 * <p>Subclasses of PreferenceActivity should implement 84 * {@link #onBuildHeaders} to populate the header list with the desired 85 * items. Doing this implicitly switches the class into its new "headers 86 * + fragments" mode rather than the old style of just showing a single 87 * preferences list. 88 * 89 * <div class="special reference"> 90 * <h3>Developer Guides</h3> 91 * <p>For information about using {@code PreferenceActivity}, 92 * read the <a href="{@docRoot}guide/topics/ui/settings.html">Settings</a> 93 * guide.</p> 94 * </div> 95 * 96 * <a name="SampleCode"></a> 97 * <h3>Sample Code</h3> 98 * 99 * <p>The following sample code shows a simple preference activity that 100 * has two different sets of preferences. The implementation, consisting 101 * of the activity itself as well as its two preference fragments is:</p> 102 * 103 * {@sample development/samples/ApiDemos/src/com/example/android/apis/preference/PreferenceWithHeaders.java 104 * activity} 105 * 106 * <p>The preference_headers resource describes the headers to be displayed 107 * and the fragments associated with them. It is: 108 * 109 * {@sample development/samples/ApiDemos/res/xml/preference_headers.xml headers} 110 * 111 * <p>The first header is shown by Prefs1Fragment, which populates itself 112 * from the following XML resource:</p> 113 * 114 * {@sample development/samples/ApiDemos/res/xml/fragmented_preferences.xml preferences} 115 * 116 * <p>Note that this XML resource contains a preference screen holding another 117 * fragment, the Prefs1FragmentInner implemented here. This allows the user 118 * to traverse down a hierarchy of preferences; pressing back will pop each 119 * fragment off the stack to return to the previous preferences. 120 * 121 * <p>See {@link PreferenceFragment} for information on implementing the 122 * fragments themselves. 123 */ 124public abstract class PreferenceActivity extends ListActivity implements 125 PreferenceManager.OnPreferenceTreeClickListener, 126 PreferenceFragment.OnPreferenceStartFragmentCallback { 127 128 private static final String TAG = "PreferenceActivity"; 129 130 // Constants for state save/restore 131 private static final String HEADERS_TAG = ":android:headers"; 132 private static final String CUR_HEADER_TAG = ":android:cur_header"; 133 private static final String PREFERENCES_TAG = ":android:preferences"; 134 135 /** 136 * When starting this activity, the invoking Intent can contain this extra 137 * string to specify which fragment should be initially displayed. 138 * <p/>Starting from Key Lime Pie, when this argument is passed in, the PreferenceActivity 139 * will call isValidFragment() to confirm that the fragment class name is valid for this 140 * activity. 141 */ 142 public static final String EXTRA_SHOW_FRAGMENT = ":android:show_fragment"; 143 144 /** 145 * When starting this activity and using {@link #EXTRA_SHOW_FRAGMENT}, 146 * this extra can also be specified to supply a Bundle of arguments to pass 147 * to that fragment when it is instantiated during the initial creation 148 * of PreferenceActivity. 149 */ 150 public static final String EXTRA_SHOW_FRAGMENT_ARGUMENTS = ":android:show_fragment_args"; 151 152 /** 153 * When starting this activity and using {@link #EXTRA_SHOW_FRAGMENT}, 154 * this extra can also be specify to supply the title to be shown for 155 * that fragment. 156 */ 157 public static final String EXTRA_SHOW_FRAGMENT_TITLE = ":android:show_fragment_title"; 158 159 /** 160 * When starting this activity and using {@link #EXTRA_SHOW_FRAGMENT}, 161 * this extra can also be specify to supply the short title to be shown for 162 * that fragment. 163 */ 164 public static final String EXTRA_SHOW_FRAGMENT_SHORT_TITLE 165 = ":android:show_fragment_short_title"; 166 167 /** 168 * When starting this activity, the invoking Intent can contain this extra 169 * boolean that the header list should not be displayed. This is most often 170 * used in conjunction with {@link #EXTRA_SHOW_FRAGMENT} to launch 171 * the activity to display a specific fragment that the user has navigated 172 * to. 173 */ 174 public static final String EXTRA_NO_HEADERS = ":android:no_headers"; 175 176 private static final String BACK_STACK_PREFS = ":android:prefs"; 177 178 // extras that allow any preference activity to be launched as part of a wizard 179 180 // show Back and Next buttons? takes boolean parameter 181 // Back will then return RESULT_CANCELED and Next RESULT_OK 182 private static final String EXTRA_PREFS_SHOW_BUTTON_BAR = "extra_prefs_show_button_bar"; 183 184 // add a Skip button? 185 private static final String EXTRA_PREFS_SHOW_SKIP = "extra_prefs_show_skip"; 186 187 // specify custom text for the Back or Next buttons, or cause a button to not appear 188 // at all by setting it to null 189 private static final String EXTRA_PREFS_SET_NEXT_TEXT = "extra_prefs_set_next_text"; 190 private static final String EXTRA_PREFS_SET_BACK_TEXT = "extra_prefs_set_back_text"; 191 192 // --- State for new mode when showing a list of headers + prefs fragment 193 194 private final ArrayList<Header> mHeaders = new ArrayList<Header>(); 195 196 private FrameLayout mListFooter; 197 198 private ViewGroup mPrefsContainer; 199 200 private FragmentBreadCrumbs mFragmentBreadCrumbs; 201 202 private boolean mSinglePane; 203 204 private Header mCurHeader; 205 206 // --- State for old mode when showing a single preference list 207 208 private PreferenceManager mPreferenceManager; 209 210 private Bundle mSavedInstanceState; 211 212 // --- Common state 213 214 private Button mNextButton; 215 216 /** 217 * The starting request code given out to preference framework. 218 */ 219 private static final int FIRST_REQUEST_CODE = 100; 220 221 private static final int MSG_BIND_PREFERENCES = 1; 222 private static final int MSG_BUILD_HEADERS = 2; 223 private Handler mHandler = new Handler() { 224 @Override 225 public void handleMessage(Message msg) { 226 switch (msg.what) { 227 case MSG_BIND_PREFERENCES: { 228 bindPreferences(); 229 } break; 230 case MSG_BUILD_HEADERS: { 231 ArrayList<Header> oldHeaders = new ArrayList<Header>(mHeaders); 232 mHeaders.clear(); 233 onBuildHeaders(mHeaders); 234 if (mAdapter instanceof BaseAdapter) { 235 ((BaseAdapter) mAdapter).notifyDataSetChanged(); 236 } 237 Header header = onGetNewHeader(); 238 if (header != null && header.fragment != null) { 239 Header mappedHeader = findBestMatchingHeader(header, oldHeaders); 240 if (mappedHeader == null || mCurHeader != mappedHeader) { 241 switchToHeader(header); 242 } 243 } else if (mCurHeader != null) { 244 Header mappedHeader = findBestMatchingHeader(mCurHeader, mHeaders); 245 if (mappedHeader != null) { 246 setSelectedHeader(mappedHeader); 247 } 248 } 249 } break; 250 } 251 } 252 }; 253 254 private static class HeaderAdapter extends ArrayAdapter<Header> { 255 private static class HeaderViewHolder { 256 ImageView icon; 257 TextView title; 258 TextView summary; 259 } 260 261 private LayoutInflater mInflater; 262 263 public HeaderAdapter(Context context, List<Header> objects) { 264 super(context, 0, objects); 265 mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 266 } 267 268 @Override 269 public View getView(int position, View convertView, ViewGroup parent) { 270 HeaderViewHolder holder; 271 View view; 272 273 if (convertView == null) { 274 view = mInflater.inflate(com.android.internal.R.layout.preference_header_item, 275 parent, false); 276 holder = new HeaderViewHolder(); 277 holder.icon = (ImageView) view.findViewById(com.android.internal.R.id.icon); 278 holder.title = (TextView) view.findViewById(com.android.internal.R.id.title); 279 holder.summary = (TextView) view.findViewById(com.android.internal.R.id.summary); 280 view.setTag(holder); 281 } else { 282 view = convertView; 283 holder = (HeaderViewHolder) view.getTag(); 284 } 285 286 // All view fields must be updated every time, because the view may be recycled 287 Header header = getItem(position); 288 holder.icon.setImageResource(header.iconRes); 289 holder.title.setText(header.getTitle(getContext().getResources())); 290 CharSequence summary = header.getSummary(getContext().getResources()); 291 if (!TextUtils.isEmpty(summary)) { 292 holder.summary.setVisibility(View.VISIBLE); 293 holder.summary.setText(summary); 294 } else { 295 holder.summary.setVisibility(View.GONE); 296 } 297 298 return view; 299 } 300 } 301 302 /** 303 * Default value for {@link Header#id Header.id} indicating that no 304 * identifier value is set. All other values (including those below -1) 305 * are valid. 306 */ 307 public static final long HEADER_ID_UNDEFINED = -1; 308 309 /** 310 * Description of a single Header item that the user can select. 311 */ 312 public static final class Header implements Parcelable { 313 /** 314 * Identifier for this header, to correlate with a new list when 315 * it is updated. The default value is 316 * {@link PreferenceActivity#HEADER_ID_UNDEFINED}, meaning no id. 317 * @attr ref android.R.styleable#PreferenceHeader_id 318 */ 319 public long id = HEADER_ID_UNDEFINED; 320 321 /** 322 * Resource ID of title of the header that is shown to the user. 323 * @attr ref android.R.styleable#PreferenceHeader_title 324 */ 325 public int titleRes; 326 327 /** 328 * Title of the header that is shown to the user. 329 * @attr ref android.R.styleable#PreferenceHeader_title 330 */ 331 public CharSequence title; 332 333 /** 334 * Resource ID of optional summary describing what this header controls. 335 * @attr ref android.R.styleable#PreferenceHeader_summary 336 */ 337 public int summaryRes; 338 339 /** 340 * Optional summary describing what this header controls. 341 * @attr ref android.R.styleable#PreferenceHeader_summary 342 */ 343 public CharSequence summary; 344 345 /** 346 * Resource ID of optional text to show as the title in the bread crumb. 347 * @attr ref android.R.styleable#PreferenceHeader_breadCrumbTitle 348 */ 349 public int breadCrumbTitleRes; 350 351 /** 352 * Optional text to show as the title in the bread crumb. 353 * @attr ref android.R.styleable#PreferenceHeader_breadCrumbTitle 354 */ 355 public CharSequence breadCrumbTitle; 356 357 /** 358 * Resource ID of optional text to show as the short title in the bread crumb. 359 * @attr ref android.R.styleable#PreferenceHeader_breadCrumbShortTitle 360 */ 361 public int breadCrumbShortTitleRes; 362 363 /** 364 * Optional text to show as the short title in the bread crumb. 365 * @attr ref android.R.styleable#PreferenceHeader_breadCrumbShortTitle 366 */ 367 public CharSequence breadCrumbShortTitle; 368 369 /** 370 * Optional icon resource to show for this header. 371 * @attr ref android.R.styleable#PreferenceHeader_icon 372 */ 373 public int iconRes; 374 375 /** 376 * Full class name of the fragment to display when this header is 377 * selected. 378 * @attr ref android.R.styleable#PreferenceHeader_fragment 379 */ 380 public String fragment; 381 382 /** 383 * Optional arguments to supply to the fragment when it is 384 * instantiated. 385 */ 386 public Bundle fragmentArguments; 387 388 /** 389 * Intent to launch when the preference is selected. 390 */ 391 public Intent intent; 392 393 /** 394 * Optional additional data for use by subclasses of PreferenceActivity. 395 */ 396 public Bundle extras; 397 398 public Header() { 399 // Empty 400 } 401 402 /** 403 * Return the currently set title. If {@link #titleRes} is set, 404 * this resource is loaded from <var>res</var> and returned. Otherwise 405 * {@link #title} is returned. 406 */ 407 public CharSequence getTitle(Resources res) { 408 if (titleRes != 0) { 409 return res.getText(titleRes); 410 } 411 return title; 412 } 413 414 /** 415 * Return the currently set summary. If {@link #summaryRes} is set, 416 * this resource is loaded from <var>res</var> and returned. Otherwise 417 * {@link #summary} is returned. 418 */ 419 public CharSequence getSummary(Resources res) { 420 if (summaryRes != 0) { 421 return res.getText(summaryRes); 422 } 423 return summary; 424 } 425 426 /** 427 * Return the currently set bread crumb title. If {@link #breadCrumbTitleRes} is set, 428 * this resource is loaded from <var>res</var> and returned. Otherwise 429 * {@link #breadCrumbTitle} is returned. 430 */ 431 public CharSequence getBreadCrumbTitle(Resources res) { 432 if (breadCrumbTitleRes != 0) { 433 return res.getText(breadCrumbTitleRes); 434 } 435 return breadCrumbTitle; 436 } 437 438 /** 439 * Return the currently set bread crumb short title. If 440 * {@link #breadCrumbShortTitleRes} is set, 441 * this resource is loaded from <var>res</var> and returned. Otherwise 442 * {@link #breadCrumbShortTitle} is returned. 443 */ 444 public CharSequence getBreadCrumbShortTitle(Resources res) { 445 if (breadCrumbShortTitleRes != 0) { 446 return res.getText(breadCrumbShortTitleRes); 447 } 448 return breadCrumbShortTitle; 449 } 450 451 @Override 452 public int describeContents() { 453 return 0; 454 } 455 456 @Override 457 public void writeToParcel(Parcel dest, int flags) { 458 dest.writeLong(id); 459 dest.writeInt(titleRes); 460 TextUtils.writeToParcel(title, dest, flags); 461 dest.writeInt(summaryRes); 462 TextUtils.writeToParcel(summary, dest, flags); 463 dest.writeInt(breadCrumbTitleRes); 464 TextUtils.writeToParcel(breadCrumbTitle, dest, flags); 465 dest.writeInt(breadCrumbShortTitleRes); 466 TextUtils.writeToParcel(breadCrumbShortTitle, dest, flags); 467 dest.writeInt(iconRes); 468 dest.writeString(fragment); 469 dest.writeBundle(fragmentArguments); 470 if (intent != null) { 471 dest.writeInt(1); 472 intent.writeToParcel(dest, flags); 473 } else { 474 dest.writeInt(0); 475 } 476 dest.writeBundle(extras); 477 } 478 479 public void readFromParcel(Parcel in) { 480 id = in.readLong(); 481 titleRes = in.readInt(); 482 title = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in); 483 summaryRes = in.readInt(); 484 summary = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in); 485 breadCrumbTitleRes = in.readInt(); 486 breadCrumbTitle = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in); 487 breadCrumbShortTitleRes = in.readInt(); 488 breadCrumbShortTitle = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in); 489 iconRes = in.readInt(); 490 fragment = in.readString(); 491 fragmentArguments = in.readBundle(); 492 if (in.readInt() != 0) { 493 intent = Intent.CREATOR.createFromParcel(in); 494 } 495 extras = in.readBundle(); 496 } 497 498 Header(Parcel in) { 499 readFromParcel(in); 500 } 501 502 public static final Creator<Header> CREATOR = new Creator<Header>() { 503 public Header createFromParcel(Parcel source) { 504 return new Header(source); 505 } 506 public Header[] newArray(int size) { 507 return new Header[size]; 508 } 509 }; 510 } 511 512 @Override 513 protected void onCreate(Bundle savedInstanceState) { 514 super.onCreate(savedInstanceState); 515 516 setContentView(com.android.internal.R.layout.preference_list_content); 517 518 mListFooter = (FrameLayout)findViewById(com.android.internal.R.id.list_footer); 519 mPrefsContainer = (ViewGroup) findViewById(com.android.internal.R.id.prefs_frame); 520 boolean hidingHeaders = onIsHidingHeaders(); 521 mSinglePane = hidingHeaders || !onIsMultiPane(); 522 String initialFragment = getIntent().getStringExtra(EXTRA_SHOW_FRAGMENT); 523 Bundle initialArguments = getIntent().getBundleExtra(EXTRA_SHOW_FRAGMENT_ARGUMENTS); 524 int initialTitle = getIntent().getIntExtra(EXTRA_SHOW_FRAGMENT_TITLE, 0); 525 int initialShortTitle = getIntent().getIntExtra(EXTRA_SHOW_FRAGMENT_SHORT_TITLE, 0); 526 527 if (savedInstanceState != null) { 528 // We are restarting from a previous saved state; used that to 529 // initialize, instead of starting fresh. 530 ArrayList<Header> headers = savedInstanceState.getParcelableArrayList(HEADERS_TAG); 531 if (headers != null) { 532 mHeaders.addAll(headers); 533 int curHeader = savedInstanceState.getInt(CUR_HEADER_TAG, 534 (int) HEADER_ID_UNDEFINED); 535 if (curHeader >= 0 && curHeader < mHeaders.size()) { 536 setSelectedHeader(mHeaders.get(curHeader)); 537 } 538 } 539 540 } else { 541 if (initialFragment != null && mSinglePane) { 542 // If we are just showing a fragment, we want to run in 543 // new fragment mode, but don't need to compute and show 544 // the headers. 545 switchToHeader(initialFragment, initialArguments); 546 if (initialTitle != 0) { 547 CharSequence initialTitleStr = getText(initialTitle); 548 CharSequence initialShortTitleStr = initialShortTitle != 0 549 ? getText(initialShortTitle) : null; 550 showBreadCrumbs(initialTitleStr, initialShortTitleStr); 551 } 552 553 } else { 554 // We need to try to build the headers. 555 onBuildHeaders(mHeaders); 556 557 // If there are headers, then at this point we need to show 558 // them and, depending on the screen, we may also show in-line 559 // the currently selected preference fragment. 560 if (mHeaders.size() > 0) { 561 if (!mSinglePane) { 562 if (initialFragment == null) { 563 Header h = onGetInitialHeader(); 564 switchToHeader(h); 565 } else { 566 switchToHeader(initialFragment, initialArguments); 567 } 568 } 569 } 570 } 571 } 572 573 // The default configuration is to only show the list view. Adjust 574 // visibility for other configurations. 575 if (initialFragment != null && mSinglePane) { 576 // Single pane, showing just a prefs fragment. 577 findViewById(com.android.internal.R.id.headers).setVisibility(View.GONE); 578 mPrefsContainer.setVisibility(View.VISIBLE); 579 if (initialTitle != 0) { 580 CharSequence initialTitleStr = getText(initialTitle); 581 CharSequence initialShortTitleStr = initialShortTitle != 0 582 ? getText(initialShortTitle) : null; 583 showBreadCrumbs(initialTitleStr, initialShortTitleStr); 584 } 585 } else if (mHeaders.size() > 0) { 586 setListAdapter(new HeaderAdapter(this, mHeaders)); 587 if (!mSinglePane) { 588 // Multi-pane. 589 getListView().setChoiceMode(AbsListView.CHOICE_MODE_SINGLE); 590 if (mCurHeader != null) { 591 setSelectedHeader(mCurHeader); 592 } 593 mPrefsContainer.setVisibility(View.VISIBLE); 594 } 595 } else { 596 // If there are no headers, we are in the old "just show a screen 597 // of preferences" mode. 598 setContentView(com.android.internal.R.layout.preference_list_content_single); 599 mListFooter = (FrameLayout) findViewById(com.android.internal.R.id.list_footer); 600 mPrefsContainer = (ViewGroup) findViewById(com.android.internal.R.id.prefs); 601 mPreferenceManager = new PreferenceManager(this, FIRST_REQUEST_CODE); 602 mPreferenceManager.setOnPreferenceTreeClickListener(this); 603 } 604 605 // see if we should show Back/Next buttons 606 Intent intent = getIntent(); 607 if (intent.getBooleanExtra(EXTRA_PREFS_SHOW_BUTTON_BAR, false)) { 608 609 findViewById(com.android.internal.R.id.button_bar).setVisibility(View.VISIBLE); 610 611 Button backButton = (Button)findViewById(com.android.internal.R.id.back_button); 612 backButton.setOnClickListener(new OnClickListener() { 613 public void onClick(View v) { 614 setResult(RESULT_CANCELED); 615 finish(); 616 } 617 }); 618 Button skipButton = (Button)findViewById(com.android.internal.R.id.skip_button); 619 skipButton.setOnClickListener(new OnClickListener() { 620 public void onClick(View v) { 621 setResult(RESULT_OK); 622 finish(); 623 } 624 }); 625 mNextButton = (Button)findViewById(com.android.internal.R.id.next_button); 626 mNextButton.setOnClickListener(new OnClickListener() { 627 public void onClick(View v) { 628 setResult(RESULT_OK); 629 finish(); 630 } 631 }); 632 633 // set our various button parameters 634 if (intent.hasExtra(EXTRA_PREFS_SET_NEXT_TEXT)) { 635 String buttonText = intent.getStringExtra(EXTRA_PREFS_SET_NEXT_TEXT); 636 if (TextUtils.isEmpty(buttonText)) { 637 mNextButton.setVisibility(View.GONE); 638 } 639 else { 640 mNextButton.setText(buttonText); 641 } 642 } 643 if (intent.hasExtra(EXTRA_PREFS_SET_BACK_TEXT)) { 644 String buttonText = intent.getStringExtra(EXTRA_PREFS_SET_BACK_TEXT); 645 if (TextUtils.isEmpty(buttonText)) { 646 backButton.setVisibility(View.GONE); 647 } 648 else { 649 backButton.setText(buttonText); 650 } 651 } 652 if (intent.getBooleanExtra(EXTRA_PREFS_SHOW_SKIP, false)) { 653 skipButton.setVisibility(View.VISIBLE); 654 } 655 } 656 } 657 658 /** 659 * Returns true if this activity is currently showing the header list. 660 */ 661 public boolean hasHeaders() { 662 return getListView().getVisibility() == View.VISIBLE 663 && mPreferenceManager == null; 664 } 665 666 /** 667 * Returns the Header list 668 * @hide 669 */ 670 public List<Header> getHeaders() { 671 return mHeaders; 672 } 673 674 /** 675 * Returns true if this activity is showing multiple panes -- the headers 676 * and a preference fragment. 677 */ 678 public boolean isMultiPane() { 679 return hasHeaders() && mPrefsContainer.getVisibility() == View.VISIBLE; 680 } 681 682 /** 683 * Called to determine if the activity should run in multi-pane mode. 684 * The default implementation returns true if the screen is large 685 * enough. 686 */ 687 public boolean onIsMultiPane() { 688 boolean preferMultiPane = getResources().getBoolean( 689 com.android.internal.R.bool.preferences_prefer_dual_pane); 690 return preferMultiPane; 691 } 692 693 /** 694 * Called to determine whether the header list should be hidden. 695 * The default implementation returns the 696 * value given in {@link #EXTRA_NO_HEADERS} or false if it is not supplied. 697 * This is set to false, for example, when the activity is being re-launched 698 * to show a particular preference activity. 699 */ 700 public boolean onIsHidingHeaders() { 701 return getIntent().getBooleanExtra(EXTRA_NO_HEADERS, false); 702 } 703 704 /** 705 * Called to determine the initial header to be shown. The default 706 * implementation simply returns the fragment of the first header. Note 707 * that the returned Header object does not actually need to exist in 708 * your header list -- whatever its fragment is will simply be used to 709 * show for the initial UI. 710 */ 711 public Header onGetInitialHeader() { 712 for (int i=0; i<mHeaders.size(); i++) { 713 Header h = mHeaders.get(i); 714 if (h.fragment != null) { 715 return h; 716 } 717 } 718 throw new IllegalStateException("Must have at least one header with a fragment"); 719 } 720 721 /** 722 * Called after the header list has been updated ({@link #onBuildHeaders} 723 * has been called and returned due to {@link #invalidateHeaders()}) to 724 * specify the header that should now be selected. The default implementation 725 * returns null to keep whatever header is currently selected. 726 */ 727 public Header onGetNewHeader() { 728 return null; 729 } 730 731 /** 732 * Called when the activity needs its list of headers build. By 733 * implementing this and adding at least one item to the list, you 734 * will cause the activity to run in its modern fragment mode. Note 735 * that this function may not always be called; for example, if the 736 * activity has been asked to display a particular fragment without 737 * the header list, there is no need to build the headers. 738 * 739 * <p>Typical implementations will use {@link #loadHeadersFromResource} 740 * to fill in the list from a resource. 741 * 742 * @param target The list in which to place the headers. 743 */ 744 public void onBuildHeaders(List<Header> target) { 745 // Should be overloaded by subclasses 746 } 747 748 /** 749 * Call when you need to change the headers being displayed. Will result 750 * in onBuildHeaders() later being called to retrieve the new list. 751 */ 752 public void invalidateHeaders() { 753 if (!mHandler.hasMessages(MSG_BUILD_HEADERS)) { 754 mHandler.sendEmptyMessage(MSG_BUILD_HEADERS); 755 } 756 } 757 758 /** 759 * Parse the given XML file as a header description, adding each 760 * parsed Header into the target list. 761 * 762 * @param resid The XML resource to load and parse. 763 * @param target The list in which the parsed headers should be placed. 764 */ 765 public void loadHeadersFromResource(int resid, List<Header> target) { 766 XmlResourceParser parser = null; 767 try { 768 parser = getResources().getXml(resid); 769 AttributeSet attrs = Xml.asAttributeSet(parser); 770 771 int type; 772 while ((type=parser.next()) != XmlPullParser.END_DOCUMENT 773 && type != XmlPullParser.START_TAG) { 774 // Parse next until start tag is found 775 } 776 777 String nodeName = parser.getName(); 778 if (!"preference-headers".equals(nodeName)) { 779 throw new RuntimeException( 780 "XML document must start with <preference-headers> tag; found" 781 + nodeName + " at " + parser.getPositionDescription()); 782 } 783 784 Bundle curBundle = null; 785 786 final int outerDepth = parser.getDepth(); 787 while ((type=parser.next()) != XmlPullParser.END_DOCUMENT 788 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 789 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 790 continue; 791 } 792 793 nodeName = parser.getName(); 794 if ("header".equals(nodeName)) { 795 Header header = new Header(); 796 797 TypedArray sa = getResources().obtainAttributes(attrs, 798 com.android.internal.R.styleable.PreferenceHeader); 799 header.id = sa.getResourceId( 800 com.android.internal.R.styleable.PreferenceHeader_id, 801 (int)HEADER_ID_UNDEFINED); 802 TypedValue tv = sa.peekValue( 803 com.android.internal.R.styleable.PreferenceHeader_title); 804 if (tv != null && tv.type == TypedValue.TYPE_STRING) { 805 if (tv.resourceId != 0) { 806 header.titleRes = tv.resourceId; 807 } else { 808 header.title = tv.string; 809 } 810 } 811 tv = sa.peekValue( 812 com.android.internal.R.styleable.PreferenceHeader_summary); 813 if (tv != null && tv.type == TypedValue.TYPE_STRING) { 814 if (tv.resourceId != 0) { 815 header.summaryRes = tv.resourceId; 816 } else { 817 header.summary = tv.string; 818 } 819 } 820 tv = sa.peekValue( 821 com.android.internal.R.styleable.PreferenceHeader_breadCrumbTitle); 822 if (tv != null && tv.type == TypedValue.TYPE_STRING) { 823 if (tv.resourceId != 0) { 824 header.breadCrumbTitleRes = tv.resourceId; 825 } else { 826 header.breadCrumbTitle = tv.string; 827 } 828 } 829 tv = sa.peekValue( 830 com.android.internal.R.styleable.PreferenceHeader_breadCrumbShortTitle); 831 if (tv != null && tv.type == TypedValue.TYPE_STRING) { 832 if (tv.resourceId != 0) { 833 header.breadCrumbShortTitleRes = tv.resourceId; 834 } else { 835 header.breadCrumbShortTitle = tv.string; 836 } 837 } 838 header.iconRes = sa.getResourceId( 839 com.android.internal.R.styleable.PreferenceHeader_icon, 0); 840 header.fragment = sa.getString( 841 com.android.internal.R.styleable.PreferenceHeader_fragment); 842 sa.recycle(); 843 844 if (curBundle == null) { 845 curBundle = new Bundle(); 846 } 847 848 final int innerDepth = parser.getDepth(); 849 while ((type=parser.next()) != XmlPullParser.END_DOCUMENT 850 && (type != XmlPullParser.END_TAG || parser.getDepth() > innerDepth)) { 851 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 852 continue; 853 } 854 855 String innerNodeName = parser.getName(); 856 if (innerNodeName.equals("extra")) { 857 getResources().parseBundleExtra("extra", attrs, curBundle); 858 XmlUtils.skipCurrentTag(parser); 859 860 } else if (innerNodeName.equals("intent")) { 861 header.intent = Intent.parseIntent(getResources(), parser, attrs); 862 863 } else { 864 XmlUtils.skipCurrentTag(parser); 865 } 866 } 867 868 if (curBundle.size() > 0) { 869 header.fragmentArguments = curBundle; 870 curBundle = null; 871 } 872 873 target.add(header); 874 } else { 875 XmlUtils.skipCurrentTag(parser); 876 } 877 } 878 879 } catch (XmlPullParserException e) { 880 throw new RuntimeException("Error parsing headers", e); 881 } catch (IOException e) { 882 throw new RuntimeException("Error parsing headers", e); 883 } finally { 884 if (parser != null) parser.close(); 885 } 886 } 887 888 /** 889 * Subclasses should override this method and verify that the given fragment is a valid type 890 * to be attached to this activity. The default implementation returns <code>true</code> for 891 * apps built for <code>android:targetSdkVersion</code> older than 892 * {@link android.os.Build.VERSION_CODES#KITKAT}. For later versions, it will throw an exception. 893 * @param fragmentName the class name of the Fragment about to be attached to this activity. 894 * @return true if the fragment class name is valid for this Activity and false otherwise. 895 */ 896 protected boolean isValidFragment(String fragmentName) { 897 if (getApplicationInfo().targetSdkVersion >= android.os.Build.VERSION_CODES.KITKAT) { 898 throw new RuntimeException( 899 "Subclasses of PreferenceActivity must override isValidFragment(String)" 900 + " to verify that the Fragment class is valid! " + this.getClass().getName() 901 + " has not checked if fragment " + fragmentName + " is valid."); 902 } else { 903 return true; 904 } 905 } 906 907 /** 908 * Set a footer that should be shown at the bottom of the header list. 909 */ 910 public void setListFooter(View view) { 911 mListFooter.removeAllViews(); 912 mListFooter.addView(view, new FrameLayout.LayoutParams( 913 FrameLayout.LayoutParams.MATCH_PARENT, 914 FrameLayout.LayoutParams.WRAP_CONTENT)); 915 } 916 917 @Override 918 protected void onStop() { 919 super.onStop(); 920 921 if (mPreferenceManager != null) { 922 mPreferenceManager.dispatchActivityStop(); 923 } 924 } 925 926 @Override 927 protected void onDestroy() { 928 mHandler.removeMessages(MSG_BIND_PREFERENCES); 929 mHandler.removeMessages(MSG_BUILD_HEADERS); 930 super.onDestroy(); 931 932 if (mPreferenceManager != null) { 933 mPreferenceManager.dispatchActivityDestroy(); 934 } 935 } 936 937 @Override 938 protected void onSaveInstanceState(Bundle outState) { 939 super.onSaveInstanceState(outState); 940 941 if (mHeaders.size() > 0) { 942 outState.putParcelableArrayList(HEADERS_TAG, mHeaders); 943 if (mCurHeader != null) { 944 int index = mHeaders.indexOf(mCurHeader); 945 if (index >= 0) { 946 outState.putInt(CUR_HEADER_TAG, index); 947 } 948 } 949 } 950 951 if (mPreferenceManager != null) { 952 final PreferenceScreen preferenceScreen = getPreferenceScreen(); 953 if (preferenceScreen != null) { 954 Bundle container = new Bundle(); 955 preferenceScreen.saveHierarchyState(container); 956 outState.putBundle(PREFERENCES_TAG, container); 957 } 958 } 959 } 960 961 @Override 962 protected void onRestoreInstanceState(Bundle state) { 963 if (mPreferenceManager != null) { 964 Bundle container = state.getBundle(PREFERENCES_TAG); 965 if (container != null) { 966 final PreferenceScreen preferenceScreen = getPreferenceScreen(); 967 if (preferenceScreen != null) { 968 preferenceScreen.restoreHierarchyState(container); 969 mSavedInstanceState = state; 970 return; 971 } 972 } 973 } 974 975 // Only call this if we didn't save the instance state for later. 976 // If we did save it, it will be restored when we bind the adapter. 977 super.onRestoreInstanceState(state); 978 } 979 980 @Override 981 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 982 super.onActivityResult(requestCode, resultCode, data); 983 984 if (mPreferenceManager != null) { 985 mPreferenceManager.dispatchActivityResult(requestCode, resultCode, data); 986 } 987 } 988 989 @Override 990 public void onContentChanged() { 991 super.onContentChanged(); 992 993 if (mPreferenceManager != null) { 994 postBindPreferences(); 995 } 996 } 997 998 @Override 999 protected void onListItemClick(ListView l, View v, int position, long id) { 1000 if (!isResumed()) { 1001 return; 1002 } 1003 super.onListItemClick(l, v, position, id); 1004 1005 if (mAdapter != null) { 1006 Object item = mAdapter.getItem(position); 1007 if (item instanceof Header) onHeaderClick((Header) item, position); 1008 } 1009 } 1010 1011 /** 1012 * Called when the user selects an item in the header list. The default 1013 * implementation will call either 1014 * {@link #startWithFragment(String, Bundle, Fragment, int, int, int)} 1015 * or {@link #switchToHeader(Header)} as appropriate. 1016 * 1017 * @param header The header that was selected. 1018 * @param position The header's position in the list. 1019 */ 1020 public void onHeaderClick(Header header, int position) { 1021 if (header.fragment != null) { 1022 if (mSinglePane) { 1023 int titleRes = header.breadCrumbTitleRes; 1024 int shortTitleRes = header.breadCrumbShortTitleRes; 1025 if (titleRes == 0) { 1026 titleRes = header.titleRes; 1027 shortTitleRes = 0; 1028 } 1029 startWithFragment(header.fragment, header.fragmentArguments, null, 0, 1030 titleRes, shortTitleRes); 1031 } else { 1032 switchToHeader(header); 1033 } 1034 } else if (header.intent != null) { 1035 startActivity(header.intent); 1036 } 1037 } 1038 1039 /** 1040 * Called by {@link #startWithFragment(String, Bundle, Fragment, int, int, int)} when 1041 * in single-pane mode, to build an Intent to launch a new activity showing 1042 * the selected fragment. The default implementation constructs an Intent 1043 * that re-launches the current activity with the appropriate arguments to 1044 * display the fragment. 1045 * 1046 * @param fragmentName The name of the fragment to display. 1047 * @param args Optional arguments to supply to the fragment. 1048 * @param titleRes Optional resource ID of title to show for this item. 1049 * @param shortTitleRes Optional resource ID of short title to show for this item. 1050 * @return Returns an Intent that can be launched to display the given 1051 * fragment. 1052 */ 1053 public Intent onBuildStartFragmentIntent(String fragmentName, Bundle args, 1054 int titleRes, int shortTitleRes) { 1055 Intent intent = new Intent(Intent.ACTION_MAIN); 1056 intent.setClass(this, getClass()); 1057 intent.putExtra(EXTRA_SHOW_FRAGMENT, fragmentName); 1058 intent.putExtra(EXTRA_SHOW_FRAGMENT_ARGUMENTS, args); 1059 intent.putExtra(EXTRA_SHOW_FRAGMENT_TITLE, titleRes); 1060 intent.putExtra(EXTRA_SHOW_FRAGMENT_SHORT_TITLE, shortTitleRes); 1061 intent.putExtra(EXTRA_NO_HEADERS, true); 1062 return intent; 1063 } 1064 1065 /** 1066 * Like {@link #startWithFragment(String, Bundle, Fragment, int, int, int)} 1067 * but uses a 0 titleRes. 1068 */ 1069 public void startWithFragment(String fragmentName, Bundle args, 1070 Fragment resultTo, int resultRequestCode) { 1071 startWithFragment(fragmentName, args, resultTo, resultRequestCode, 0, 0); 1072 } 1073 1074 /** 1075 * Start a new instance of this activity, showing only the given 1076 * preference fragment. When launched in this mode, the header list 1077 * will be hidden and the given preference fragment will be instantiated 1078 * and fill the entire activity. 1079 * 1080 * @param fragmentName The name of the fragment to display. 1081 * @param args Optional arguments to supply to the fragment. 1082 * @param resultTo Option fragment that should receive the result of 1083 * the activity launch. 1084 * @param resultRequestCode If resultTo is non-null, this is the request 1085 * code in which to report the result. 1086 * @param titleRes Resource ID of string to display for the title of 1087 * this set of preferences. 1088 * @param shortTitleRes Resource ID of string to display for the short title of 1089 * this set of preferences. 1090 */ 1091 public void startWithFragment(String fragmentName, Bundle args, 1092 Fragment resultTo, int resultRequestCode, int titleRes, int shortTitleRes) { 1093 Intent intent = onBuildStartFragmentIntent(fragmentName, args, titleRes, shortTitleRes); 1094 if (resultTo == null) { 1095 startActivity(intent); 1096 } else { 1097 resultTo.startActivityForResult(intent, resultRequestCode); 1098 } 1099 } 1100 1101 /** 1102 * Change the base title of the bread crumbs for the current preferences. 1103 * This will normally be called for you. See 1104 * {@link android.app.FragmentBreadCrumbs} for more information. 1105 */ 1106 public void showBreadCrumbs(CharSequence title, CharSequence shortTitle) { 1107 if (mFragmentBreadCrumbs == null) { 1108 View crumbs = findViewById(android.R.id.title); 1109 // For screens with a different kind of title, don't create breadcrumbs. 1110 try { 1111 mFragmentBreadCrumbs = (FragmentBreadCrumbs)crumbs; 1112 } catch (ClassCastException e) { 1113 setTitle(title); 1114 return; 1115 } 1116 if (mFragmentBreadCrumbs == null) { 1117 if (title != null) { 1118 setTitle(title); 1119 } 1120 return; 1121 } 1122 if (mSinglePane) { 1123 mFragmentBreadCrumbs.setVisibility(View.GONE); 1124 // Hide the breadcrumb section completely for single-pane 1125 View bcSection = findViewById(com.android.internal.R.id.breadcrumb_section); 1126 if (bcSection != null) bcSection.setVisibility(View.GONE); 1127 setTitle(title); 1128 } 1129 mFragmentBreadCrumbs.setMaxVisible(2); 1130 mFragmentBreadCrumbs.setActivity(this); 1131 } 1132 if (mFragmentBreadCrumbs.getVisibility() != View.VISIBLE) { 1133 setTitle(title); 1134 } else { 1135 mFragmentBreadCrumbs.setTitle(title, shortTitle); 1136 mFragmentBreadCrumbs.setParentTitle(null, null, null); 1137 } 1138 } 1139 1140 /** 1141 * Should be called after onCreate to ensure that the breadcrumbs, if any, were created. 1142 * This prepends a title to the fragment breadcrumbs and attaches a listener to any clicks 1143 * on the parent entry. 1144 * @param title the title for the breadcrumb 1145 * @param shortTitle the short title for the breadcrumb 1146 */ 1147 public void setParentTitle(CharSequence title, CharSequence shortTitle, 1148 OnClickListener listener) { 1149 if (mFragmentBreadCrumbs != null) { 1150 mFragmentBreadCrumbs.setParentTitle(title, shortTitle, listener); 1151 } 1152 } 1153 1154 void setSelectedHeader(Header header) { 1155 mCurHeader = header; 1156 int index = mHeaders.indexOf(header); 1157 if (index >= 0) { 1158 getListView().setItemChecked(index, true); 1159 } else { 1160 getListView().clearChoices(); 1161 } 1162 showBreadCrumbs(header); 1163 } 1164 1165 void showBreadCrumbs(Header header) { 1166 if (header != null) { 1167 CharSequence title = header.getBreadCrumbTitle(getResources()); 1168 if (title == null) title = header.getTitle(getResources()); 1169 if (title == null) title = getTitle(); 1170 showBreadCrumbs(title, header.getBreadCrumbShortTitle(getResources())); 1171 } else { 1172 showBreadCrumbs(getTitle(), null); 1173 } 1174 } 1175 1176 private void switchToHeaderInner(String fragmentName, Bundle args, int direction) { 1177 getFragmentManager().popBackStack(BACK_STACK_PREFS, 1178 FragmentManager.POP_BACK_STACK_INCLUSIVE); 1179 if (!isValidFragment(fragmentName)) { 1180 throw new IllegalArgumentException("Invalid fragment for this activity: " 1181 + fragmentName); 1182 } 1183 Fragment f = Fragment.instantiate(this, fragmentName, args); 1184 FragmentTransaction transaction = getFragmentManager().beginTransaction(); 1185 transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE); 1186 transaction.replace(com.android.internal.R.id.prefs, f); 1187 transaction.commitAllowingStateLoss(); 1188 } 1189 1190 /** 1191 * When in two-pane mode, switch the fragment pane to show the given 1192 * preference fragment. 1193 * 1194 * @param fragmentName The name of the fragment to display. 1195 * @param args Optional arguments to supply to the fragment. 1196 */ 1197 public void switchToHeader(String fragmentName, Bundle args) { 1198 setSelectedHeader(null); 1199 switchToHeaderInner(fragmentName, args, 0); 1200 } 1201 1202 /** 1203 * When in two-pane mode, switch to the fragment pane to show the given 1204 * preference fragment. 1205 * 1206 * @param header The new header to display. 1207 */ 1208 public void switchToHeader(Header header) { 1209 if (mCurHeader == header) { 1210 // This is the header we are currently displaying. Just make sure 1211 // to pop the stack up to its root state. 1212 getFragmentManager().popBackStack(BACK_STACK_PREFS, 1213 FragmentManager.POP_BACK_STACK_INCLUSIVE); 1214 } else { 1215 if (header.fragment == null) { 1216 throw new IllegalStateException("can't switch to header that has no fragment"); 1217 } 1218 int direction = mHeaders.indexOf(header) - mHeaders.indexOf(mCurHeader); 1219 switchToHeaderInner(header.fragment, header.fragmentArguments, direction); 1220 setSelectedHeader(header); 1221 } 1222 } 1223 1224 Header findBestMatchingHeader(Header cur, ArrayList<Header> from) { 1225 ArrayList<Header> matches = new ArrayList<Header>(); 1226 for (int j=0; j<from.size(); j++) { 1227 Header oh = from.get(j); 1228 if (cur == oh || (cur.id != HEADER_ID_UNDEFINED && cur.id == oh.id)) { 1229 // Must be this one. 1230 matches.clear(); 1231 matches.add(oh); 1232 break; 1233 } 1234 if (cur.fragment != null) { 1235 if (cur.fragment.equals(oh.fragment)) { 1236 matches.add(oh); 1237 } 1238 } else if (cur.intent != null) { 1239 if (cur.intent.equals(oh.intent)) { 1240 matches.add(oh); 1241 } 1242 } else if (cur.title != null) { 1243 if (cur.title.equals(oh.title)) { 1244 matches.add(oh); 1245 } 1246 } 1247 } 1248 final int NM = matches.size(); 1249 if (NM == 1) { 1250 return matches.get(0); 1251 } else if (NM > 1) { 1252 for (int j=0; j<NM; j++) { 1253 Header oh = matches.get(j); 1254 if (cur.fragmentArguments != null && 1255 cur.fragmentArguments.equals(oh.fragmentArguments)) { 1256 return oh; 1257 } 1258 if (cur.extras != null && cur.extras.equals(oh.extras)) { 1259 return oh; 1260 } 1261 if (cur.title != null && cur.title.equals(oh.title)) { 1262 return oh; 1263 } 1264 } 1265 } 1266 return null; 1267 } 1268 1269 /** 1270 * Start a new fragment. 1271 * 1272 * @param fragment The fragment to start 1273 * @param push If true, the current fragment will be pushed onto the back stack. If false, 1274 * the current fragment will be replaced. 1275 */ 1276 public void startPreferenceFragment(Fragment fragment, boolean push) { 1277 FragmentTransaction transaction = getFragmentManager().beginTransaction(); 1278 transaction.replace(com.android.internal.R.id.prefs, fragment); 1279 if (push) { 1280 transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN); 1281 transaction.addToBackStack(BACK_STACK_PREFS); 1282 } else { 1283 transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE); 1284 } 1285 transaction.commitAllowingStateLoss(); 1286 } 1287 1288 /** 1289 * Start a new fragment containing a preference panel. If the preferences 1290 * are being displayed in multi-pane mode, the given fragment class will 1291 * be instantiated and placed in the appropriate pane. If running in 1292 * single-pane mode, a new activity will be launched in which to show the 1293 * fragment. 1294 * 1295 * @param fragmentClass Full name of the class implementing the fragment. 1296 * @param args Any desired arguments to supply to the fragment. 1297 * @param titleRes Optional resource identifier of the title of this 1298 * fragment. 1299 * @param titleText Optional text of the title of this fragment. 1300 * @param resultTo Optional fragment that result data should be sent to. 1301 * If non-null, resultTo.onActivityResult() will be called when this 1302 * preference panel is done. The launched panel must use 1303 * {@link #finishPreferencePanel(Fragment, int, Intent)} when done. 1304 * @param resultRequestCode If resultTo is non-null, this is the caller's 1305 * request code to be received with the resut. 1306 */ 1307 public void startPreferencePanel(String fragmentClass, Bundle args, int titleRes, 1308 CharSequence titleText, Fragment resultTo, int resultRequestCode) { 1309 if (mSinglePane) { 1310 startWithFragment(fragmentClass, args, resultTo, resultRequestCode, titleRes, 0); 1311 } else { 1312 Fragment f = Fragment.instantiate(this, fragmentClass, args); 1313 if (resultTo != null) { 1314 f.setTargetFragment(resultTo, resultRequestCode); 1315 } 1316 FragmentTransaction transaction = getFragmentManager().beginTransaction(); 1317 transaction.replace(com.android.internal.R.id.prefs, f); 1318 if (titleRes != 0) { 1319 transaction.setBreadCrumbTitle(titleRes); 1320 } else if (titleText != null) { 1321 transaction.setBreadCrumbTitle(titleText); 1322 } 1323 transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN); 1324 transaction.addToBackStack(BACK_STACK_PREFS); 1325 transaction.commitAllowingStateLoss(); 1326 } 1327 } 1328 1329 /** 1330 * Called by a preference panel fragment to finish itself. 1331 * 1332 * @param caller The fragment that is asking to be finished. 1333 * @param resultCode Optional result code to send back to the original 1334 * launching fragment. 1335 * @param resultData Optional result data to send back to the original 1336 * launching fragment. 1337 */ 1338 public void finishPreferencePanel(Fragment caller, int resultCode, Intent resultData) { 1339 if (mSinglePane) { 1340 setResult(resultCode, resultData); 1341 finish(); 1342 } else { 1343 // XXX be smarter about popping the stack. 1344 onBackPressed(); 1345 if (caller != null) { 1346 if (caller.getTargetFragment() != null) { 1347 caller.getTargetFragment().onActivityResult(caller.getTargetRequestCode(), 1348 resultCode, resultData); 1349 } 1350 } 1351 } 1352 } 1353 1354 @Override 1355 public boolean onPreferenceStartFragment(PreferenceFragment caller, Preference pref) { 1356 startPreferencePanel(pref.getFragment(), pref.getExtras(), pref.getTitleRes(), 1357 pref.getTitle(), null, 0); 1358 return true; 1359 } 1360 1361 /** 1362 * Posts a message to bind the preferences to the list view. 1363 * <p> 1364 * Binding late is preferred as any custom preference types created in 1365 * {@link #onCreate(Bundle)} are able to have their views recycled. 1366 */ 1367 private void postBindPreferences() { 1368 if (mHandler.hasMessages(MSG_BIND_PREFERENCES)) return; 1369 mHandler.obtainMessage(MSG_BIND_PREFERENCES).sendToTarget(); 1370 } 1371 1372 private void bindPreferences() { 1373 final PreferenceScreen preferenceScreen = getPreferenceScreen(); 1374 if (preferenceScreen != null) { 1375 preferenceScreen.bind(getListView()); 1376 if (mSavedInstanceState != null) { 1377 super.onRestoreInstanceState(mSavedInstanceState); 1378 mSavedInstanceState = null; 1379 } 1380 } 1381 } 1382 1383 /** 1384 * Returns the {@link PreferenceManager} used by this activity. 1385 * @return The {@link PreferenceManager}. 1386 * 1387 * @deprecated This function is not relevant for a modern fragment-based 1388 * PreferenceActivity. 1389 */ 1390 @Deprecated 1391 public PreferenceManager getPreferenceManager() { 1392 return mPreferenceManager; 1393 } 1394 1395 private void requirePreferenceManager() { 1396 if (mPreferenceManager == null) { 1397 if (mAdapter == null) { 1398 throw new RuntimeException("This should be called after super.onCreate."); 1399 } 1400 throw new RuntimeException( 1401 "Modern two-pane PreferenceActivity requires use of a PreferenceFragment"); 1402 } 1403 } 1404 1405 /** 1406 * Sets the root of the preference hierarchy that this activity is showing. 1407 * 1408 * @param preferenceScreen The root {@link PreferenceScreen} of the preference hierarchy. 1409 * 1410 * @deprecated This function is not relevant for a modern fragment-based 1411 * PreferenceActivity. 1412 */ 1413 @Deprecated 1414 public void setPreferenceScreen(PreferenceScreen preferenceScreen) { 1415 requirePreferenceManager(); 1416 1417 if (mPreferenceManager.setPreferences(preferenceScreen) && preferenceScreen != null) { 1418 postBindPreferences(); 1419 CharSequence title = getPreferenceScreen().getTitle(); 1420 // Set the title of the activity 1421 if (title != null) { 1422 setTitle(title); 1423 } 1424 } 1425 } 1426 1427 /** 1428 * Gets the root of the preference hierarchy that this activity is showing. 1429 * 1430 * @return The {@link PreferenceScreen} that is the root of the preference 1431 * hierarchy. 1432 * 1433 * @deprecated This function is not relevant for a modern fragment-based 1434 * PreferenceActivity. 1435 */ 1436 @Deprecated 1437 public PreferenceScreen getPreferenceScreen() { 1438 if (mPreferenceManager != null) { 1439 return mPreferenceManager.getPreferenceScreen(); 1440 } 1441 return null; 1442 } 1443 1444 /** 1445 * Adds preferences from activities that match the given {@link Intent}. 1446 * 1447 * @param intent The {@link Intent} to query activities. 1448 * 1449 * @deprecated This function is not relevant for a modern fragment-based 1450 * PreferenceActivity. 1451 */ 1452 @Deprecated 1453 public void addPreferencesFromIntent(Intent intent) { 1454 requirePreferenceManager(); 1455 1456 setPreferenceScreen(mPreferenceManager.inflateFromIntent(intent, getPreferenceScreen())); 1457 } 1458 1459 /** 1460 * Inflates the given XML resource and adds the preference hierarchy to the current 1461 * preference hierarchy. 1462 * 1463 * @param preferencesResId The XML resource ID to inflate. 1464 * 1465 * @deprecated This function is not relevant for a modern fragment-based 1466 * PreferenceActivity. 1467 */ 1468 @Deprecated 1469 public void addPreferencesFromResource(int preferencesResId) { 1470 requirePreferenceManager(); 1471 1472 setPreferenceScreen(mPreferenceManager.inflateFromResource(this, preferencesResId, 1473 getPreferenceScreen())); 1474 } 1475 1476 /** 1477 * {@inheritDoc} 1478 * 1479 * @deprecated This function is not relevant for a modern fragment-based 1480 * PreferenceActivity. 1481 */ 1482 @Deprecated 1483 public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) { 1484 return false; 1485 } 1486 1487 /** 1488 * Finds a {@link Preference} based on its key. 1489 * 1490 * @param key The key of the preference to retrieve. 1491 * @return The {@link Preference} with the key, or null. 1492 * @see PreferenceGroup#findPreference(CharSequence) 1493 * 1494 * @deprecated This function is not relevant for a modern fragment-based 1495 * PreferenceActivity. 1496 */ 1497 @Deprecated 1498 public Preference findPreference(CharSequence key) { 1499 1500 if (mPreferenceManager == null) { 1501 return null; 1502 } 1503 1504 return mPreferenceManager.findPreference(key); 1505 } 1506 1507 @Override 1508 protected void onNewIntent(Intent intent) { 1509 if (mPreferenceManager != null) { 1510 mPreferenceManager.dispatchNewIntent(intent); 1511 } 1512 } 1513 1514 // give subclasses access to the Next button 1515 /** @hide */ 1516 protected boolean hasNextButton() { 1517 return mNextButton != null; 1518 } 1519 /** @hide */ 1520 protected Button getNextButton() { 1521 return mNextButton; 1522 } 1523} 1524