The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 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 | |
| 17 | package android.preference; |
| 18 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 19 | import android.app.Activity; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 20 | import android.content.Context; |
| 21 | import android.content.DialogInterface; |
| 22 | import android.content.Intent; |
| 23 | import android.content.SharedPreferences; |
| 24 | import android.content.pm.ActivityInfo; |
| 25 | import android.content.pm.PackageManager; |
| 26 | import android.content.pm.ResolveInfo; |
| 27 | import android.content.pm.PackageManager.NameNotFoundException; |
| 28 | import android.content.res.XmlResourceParser; |
| 29 | import android.os.Bundle; |
| 30 | import android.util.Log; |
| 31 | |
Amith Yamasani | 82e7bc1 | 2010-09-23 15:07:58 -0700 | [diff] [blame] | 32 | import java.util.ArrayList; |
| 33 | import java.util.HashSet; |
| 34 | import java.util.List; |
| 35 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 36 | /** |
| 37 | * Used to help create {@link Preference} hierarchies |
| 38 | * from activities or XML. |
| 39 | * <p> |
| 40 | * In most cases, clients should use |
| 41 | * {@link PreferenceActivity#addPreferencesFromIntent} or |
| 42 | * {@link PreferenceActivity#addPreferencesFromResource(int)}. |
| 43 | * |
| 44 | * @see PreferenceActivity |
| 45 | */ |
| 46 | public class PreferenceManager { |
| 47 | |
| 48 | private static final String TAG = "PreferenceManager"; |
| 49 | |
| 50 | /** |
| 51 | * The Activity meta-data key for its XML preference hierarchy. |
| 52 | */ |
| 53 | public static final String METADATA_KEY_PREFERENCES = "android.preference"; |
| 54 | |
| 55 | public static final String KEY_HAS_SET_DEFAULT_VALUES = "_has_set_default_values"; |
| 56 | |
| 57 | /** |
| 58 | * @see #getActivity() |
| 59 | */ |
| 60 | private Activity mActivity; |
| 61 | |
| 62 | /** |
Amith Yamasani | 82e7bc1 | 2010-09-23 15:07:58 -0700 | [diff] [blame] | 63 | * Fragment that owns this instance. |
| 64 | */ |
| 65 | private PreferenceFragment mFragment; |
| 66 | |
| 67 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 68 | * The context to use. This should always be set. |
| 69 | * |
| 70 | * @see #mActivity |
| 71 | */ |
| 72 | private Context mContext; |
| 73 | |
| 74 | /** |
| 75 | * The counter for unique IDs. |
| 76 | */ |
| 77 | private long mNextId = 0; |
| 78 | |
| 79 | /** |
| 80 | * The counter for unique request codes. |
| 81 | */ |
| 82 | private int mNextRequestCode; |
| 83 | |
| 84 | /** |
| 85 | * Cached shared preferences. |
| 86 | */ |
| 87 | private SharedPreferences mSharedPreferences; |
| 88 | |
| 89 | /** |
| 90 | * If in no-commit mode, the shared editor to give out (which will be |
| 91 | * committed when exiting no-commit mode). |
| 92 | */ |
| 93 | private SharedPreferences.Editor mEditor; |
| 94 | |
| 95 | /** |
| 96 | * Blocks commits from happening on the shared editor. This is used when |
| 97 | * inflating the hierarchy. Do not set this directly, use {@link #setNoCommit(boolean)} |
| 98 | */ |
| 99 | private boolean mNoCommit; |
| 100 | |
| 101 | /** |
| 102 | * The SharedPreferences name that will be used for all {@link Preference}s |
| 103 | * managed by this instance. |
| 104 | */ |
| 105 | private String mSharedPreferencesName; |
| 106 | |
| 107 | /** |
| 108 | * The SharedPreferences mode that will be used for all {@link Preference}s |
| 109 | * managed by this instance. |
| 110 | */ |
| 111 | private int mSharedPreferencesMode; |
| 112 | |
| 113 | /** |
| 114 | * The {@link PreferenceScreen} at the root of the preference hierarchy. |
| 115 | */ |
| 116 | private PreferenceScreen mPreferenceScreen; |
| 117 | |
| 118 | /** |
| 119 | * List of activity result listeners. |
| 120 | */ |
| 121 | private List<OnActivityResultListener> mActivityResultListeners; |
| 122 | |
| 123 | /** |
| 124 | * List of activity stop listeners. |
| 125 | */ |
| 126 | private List<OnActivityStopListener> mActivityStopListeners; |
| 127 | |
| 128 | /** |
| 129 | * List of activity destroy listeners. |
| 130 | */ |
| 131 | private List<OnActivityDestroyListener> mActivityDestroyListeners; |
| 132 | |
| 133 | /** |
| 134 | * List of dialogs that should be dismissed when we receive onNewIntent in |
| 135 | * our PreferenceActivity. |
| 136 | */ |
| 137 | private List<DialogInterface> mPreferencesScreens; |
| 138 | |
| 139 | private OnPreferenceTreeClickListener mOnPreferenceTreeClickListener; |
| 140 | |
Justin Koh | 37ae558 | 2012-10-25 15:26:36 -0700 | [diff] [blame] | 141 | /** |
| 142 | * @hide |
| 143 | */ |
| 144 | public PreferenceManager(Activity activity, int firstRequestCode) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 145 | mActivity = activity; |
| 146 | mNextRequestCode = firstRequestCode; |
| 147 | |
| 148 | init(activity); |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * This constructor should ONLY be used when getting default values from |
| 153 | * an XML preference hierarchy. |
| 154 | * <p> |
| 155 | * The {@link PreferenceManager#PreferenceManager(Activity)} |
| 156 | * should be used ANY time a preference will be displayed, since some preference |
| 157 | * types need an Activity for managed queries. |
| 158 | */ |
| 159 | private PreferenceManager(Context context) { |
| 160 | init(context); |
| 161 | } |
| 162 | |
| 163 | private void init(Context context) { |
| 164 | mContext = context; |
| 165 | |
| 166 | setSharedPreferencesName(getDefaultSharedPreferencesName(context)); |
| 167 | } |
Amith Yamasani | 82e7bc1 | 2010-09-23 15:07:58 -0700 | [diff] [blame] | 168 | |
| 169 | /** |
| 170 | * Sets the owning preference fragment |
| 171 | */ |
| 172 | void setFragment(PreferenceFragment fragment) { |
| 173 | mFragment = fragment; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Returns the owning preference fragment, if any. |
| 178 | */ |
| 179 | PreferenceFragment getFragment() { |
| 180 | return mFragment; |
| 181 | } |
| 182 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 183 | /** |
| 184 | * Returns a list of {@link Activity} (indirectly) that match a given |
| 185 | * {@link Intent}. |
| 186 | * |
| 187 | * @param queryIntent The Intent to match. |
| 188 | * @return The list of {@link ResolveInfo} that point to the matched |
| 189 | * activities. |
| 190 | */ |
| 191 | private List<ResolveInfo> queryIntentActivities(Intent queryIntent) { |
| 192 | return mContext.getPackageManager().queryIntentActivities(queryIntent, |
| 193 | PackageManager.GET_META_DATA); |
| 194 | } |
| 195 | |
| 196 | /** |
| 197 | * Inflates a preference hierarchy from the preference hierarchies of |
| 198 | * {@link Activity Activities} that match the given {@link Intent}. An |
| 199 | * {@link Activity} defines its preference hierarchy with meta-data using |
| 200 | * the {@link #METADATA_KEY_PREFERENCES} key. |
| 201 | * <p> |
| 202 | * If a preference hierarchy is given, the new preference hierarchies will |
| 203 | * be merged in. |
| 204 | * |
| 205 | * @param queryIntent The intent to match activities. |
| 206 | * @param rootPreferences Optional existing hierarchy to merge the new |
| 207 | * hierarchies into. |
| 208 | * @return The root hierarchy (if one was not provided, the new hierarchy's |
| 209 | * root). |
| 210 | */ |
| 211 | PreferenceScreen inflateFromIntent(Intent queryIntent, PreferenceScreen rootPreferences) { |
| 212 | final List<ResolveInfo> activities = queryIntentActivities(queryIntent); |
| 213 | final HashSet<String> inflatedRes = new HashSet<String>(); |
| 214 | |
| 215 | for (int i = activities.size() - 1; i >= 0; i--) { |
| 216 | final ActivityInfo activityInfo = activities.get(i).activityInfo; |
| 217 | final Bundle metaData = activityInfo.metaData; |
| 218 | |
| 219 | if ((metaData == null) || !metaData.containsKey(METADATA_KEY_PREFERENCES)) { |
| 220 | continue; |
| 221 | } |
| 222 | |
| 223 | // Need to concat the package with res ID since the same res ID |
| 224 | // can be re-used across contexts |
| 225 | final String uniqueResId = activityInfo.packageName + ":" |
| 226 | + activityInfo.metaData.getInt(METADATA_KEY_PREFERENCES); |
| 227 | |
| 228 | if (!inflatedRes.contains(uniqueResId)) { |
| 229 | inflatedRes.add(uniqueResId); |
| 230 | |
| 231 | final Context context; |
| 232 | try { |
| 233 | context = mContext.createPackageContext(activityInfo.packageName, 0); |
| 234 | } catch (NameNotFoundException e) { |
| 235 | Log.w(TAG, "Could not create context for " + activityInfo.packageName + ": " |
| 236 | + Log.getStackTraceString(e)); |
| 237 | continue; |
| 238 | } |
| 239 | |
| 240 | final PreferenceInflater inflater = new PreferenceInflater(context, this); |
| 241 | final XmlResourceParser parser = activityInfo.loadXmlMetaData(context |
| 242 | .getPackageManager(), METADATA_KEY_PREFERENCES); |
| 243 | rootPreferences = (PreferenceScreen) inflater |
| 244 | .inflate(parser, rootPreferences, true); |
| 245 | parser.close(); |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | rootPreferences.onAttachedToHierarchy(this); |
| 250 | |
| 251 | return rootPreferences; |
| 252 | } |
| 253 | |
| 254 | /** |
| 255 | * Inflates a preference hierarchy from XML. If a preference hierarchy is |
| 256 | * given, the new preference hierarchies will be merged in. |
| 257 | * |
| 258 | * @param context The context of the resource. |
| 259 | * @param resId The resource ID of the XML to inflate. |
| 260 | * @param rootPreferences Optional existing hierarchy to merge the new |
| 261 | * hierarchies into. |
| 262 | * @return The root hierarchy (if one was not provided, the new hierarchy's |
| 263 | * root). |
Owen Lin | f9b702e | 2009-08-27 18:30:05 +0800 | [diff] [blame] | 264 | * @hide |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 265 | */ |
Owen Lin | f9b702e | 2009-08-27 18:30:05 +0800 | [diff] [blame] | 266 | public PreferenceScreen inflateFromResource(Context context, int resId, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 267 | PreferenceScreen rootPreferences) { |
| 268 | // Block commits |
| 269 | setNoCommit(true); |
| 270 | |
| 271 | final PreferenceInflater inflater = new PreferenceInflater(context, this); |
| 272 | rootPreferences = (PreferenceScreen) inflater.inflate(resId, rootPreferences, true); |
| 273 | rootPreferences.onAttachedToHierarchy(this); |
| 274 | |
| 275 | // Unblock commits |
| 276 | setNoCommit(false); |
| 277 | |
| 278 | return rootPreferences; |
| 279 | } |
| 280 | |
| 281 | public PreferenceScreen createPreferenceScreen(Context context) { |
| 282 | final PreferenceScreen preferenceScreen = new PreferenceScreen(context, null); |
| 283 | preferenceScreen.onAttachedToHierarchy(this); |
| 284 | return preferenceScreen; |
| 285 | } |
| 286 | |
| 287 | /** |
| 288 | * Called by a preference to get a unique ID in its hierarchy. |
| 289 | * |
| 290 | * @return A unique ID. |
| 291 | */ |
| 292 | long getNextId() { |
| 293 | synchronized (this) { |
| 294 | return mNextId++; |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * Returns the current name of the SharedPreferences file that preferences managed by |
| 300 | * this will use. |
| 301 | * |
| 302 | * @return The name that can be passed to {@link Context#getSharedPreferences(String, int)}. |
| 303 | * @see Context#getSharedPreferences(String, int) |
| 304 | */ |
| 305 | public String getSharedPreferencesName() { |
| 306 | return mSharedPreferencesName; |
| 307 | } |
| 308 | |
| 309 | /** |
| 310 | * Sets the name of the SharedPreferences file that preferences managed by this |
| 311 | * will use. |
| 312 | * |
| 313 | * @param sharedPreferencesName The name of the SharedPreferences file. |
| 314 | * @see Context#getSharedPreferences(String, int) |
| 315 | */ |
| 316 | public void setSharedPreferencesName(String sharedPreferencesName) { |
| 317 | mSharedPreferencesName = sharedPreferencesName; |
| 318 | mSharedPreferences = null; |
| 319 | } |
| 320 | |
| 321 | /** |
| 322 | * Returns the current mode of the SharedPreferences file that preferences managed by |
| 323 | * this will use. |
| 324 | * |
| 325 | * @return The mode that can be passed to {@link Context#getSharedPreferences(String, int)}. |
| 326 | * @see Context#getSharedPreferences(String, int) |
| 327 | */ |
| 328 | public int getSharedPreferencesMode() { |
| 329 | return mSharedPreferencesMode; |
| 330 | } |
| 331 | |
| 332 | /** |
| 333 | * Sets the mode of the SharedPreferences file that preferences managed by this |
| 334 | * will use. |
| 335 | * |
| 336 | * @param sharedPreferencesMode The mode of the SharedPreferences file. |
| 337 | * @see Context#getSharedPreferences(String, int) |
| 338 | */ |
| 339 | public void setSharedPreferencesMode(int sharedPreferencesMode) { |
| 340 | mSharedPreferencesMode = sharedPreferencesMode; |
| 341 | mSharedPreferences = null; |
| 342 | } |
| 343 | |
| 344 | /** |
| 345 | * Gets a SharedPreferences instance that preferences managed by this will |
| 346 | * use. |
| 347 | * |
| 348 | * @return A SharedPreferences instance pointing to the file that contains |
| 349 | * the values of preferences that are managed by this. |
| 350 | */ |
| 351 | public SharedPreferences getSharedPreferences() { |
| 352 | if (mSharedPreferences == null) { |
| 353 | mSharedPreferences = mContext.getSharedPreferences(mSharedPreferencesName, |
| 354 | mSharedPreferencesMode); |
| 355 | } |
| 356 | |
| 357 | return mSharedPreferences; |
| 358 | } |
| 359 | |
| 360 | /** |
| 361 | * Gets a SharedPreferences instance that points to the default file that is |
| 362 | * used by the preference framework in the given context. |
| 363 | * |
| 364 | * @param context The context of the preferences whose values are wanted. |
| 365 | * @return A SharedPreferences instance that can be used to retrieve and |
| 366 | * listen to values of the preferences. |
| 367 | */ |
| 368 | public static SharedPreferences getDefaultSharedPreferences(Context context) { |
| 369 | return context.getSharedPreferences(getDefaultSharedPreferencesName(context), |
| 370 | getDefaultSharedPreferencesMode()); |
| 371 | } |
| 372 | |
| 373 | private static String getDefaultSharedPreferencesName(Context context) { |
| 374 | return context.getPackageName() + "_preferences"; |
| 375 | } |
| 376 | |
| 377 | private static int getDefaultSharedPreferencesMode() { |
| 378 | return Context.MODE_PRIVATE; |
| 379 | } |
| 380 | |
| 381 | /** |
| 382 | * Returns the root of the preference hierarchy managed by this class. |
| 383 | * |
| 384 | * @return The {@link PreferenceScreen} object that is at the root of the hierarchy. |
| 385 | */ |
| 386 | PreferenceScreen getPreferenceScreen() { |
| 387 | return mPreferenceScreen; |
| 388 | } |
| 389 | |
| 390 | /** |
| 391 | * Sets the root of the preference hierarchy. |
| 392 | * |
| 393 | * @param preferenceScreen The root {@link PreferenceScreen} of the preference hierarchy. |
| 394 | * @return Whether the {@link PreferenceScreen} given is different than the previous. |
| 395 | */ |
| 396 | boolean setPreferences(PreferenceScreen preferenceScreen) { |
| 397 | if (preferenceScreen != mPreferenceScreen) { |
| 398 | mPreferenceScreen = preferenceScreen; |
| 399 | return true; |
| 400 | } |
| 401 | |
| 402 | return false; |
| 403 | } |
| 404 | |
| 405 | /** |
| 406 | * Finds a {@link Preference} based on its key. |
| 407 | * |
| 408 | * @param key The key of the preference to retrieve. |
| 409 | * @return The {@link Preference} with the key, or null. |
| 410 | * @see PreferenceGroup#findPreference(CharSequence) |
| 411 | */ |
| 412 | public Preference findPreference(CharSequence key) { |
| 413 | if (mPreferenceScreen == null) { |
| 414 | return null; |
| 415 | } |
| 416 | |
| 417 | return mPreferenceScreen.findPreference(key); |
| 418 | } |
| 419 | |
| 420 | /** |
Scott Main | bbb3f41 | 2012-03-09 19:10:40 -0800 | [diff] [blame] | 421 | * Sets the default values from an XML preference file by reading the values defined |
| 422 | * by each {@link Preference} item's {@code android:defaultValue} attribute. This should |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 423 | * be called by the application's main activity. |
| 424 | * <p> |
Scott Main | bbb3f41 | 2012-03-09 19:10:40 -0800 | [diff] [blame] | 425 | * |
| 426 | * @param context The context of the shared preferences. |
| 427 | * @param resId The resource ID of the preference XML file. |
| 428 | * @param readAgain Whether to re-read the default values. |
| 429 | * If false, this method sets the default values only if this |
| 430 | * method has never been called in the past (or if the |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 431 | * {@link #KEY_HAS_SET_DEFAULT_VALUES} in the default value shared |
| 432 | * preferences file is false). To attempt to set the default values again |
| 433 | * bypassing this check, set {@code readAgain} to true. |
Scott Main | bbb3f41 | 2012-03-09 19:10:40 -0800 | [diff] [blame] | 434 | * <p class="note"> |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 435 | * Note: this will NOT reset preferences back to their default |
| 436 | * values. For that functionality, use |
| 437 | * {@link PreferenceManager#getDefaultSharedPreferences(Context)} |
| 438 | * and clear it followed by a call to this method with this |
| 439 | * parameter set to true. |
| 440 | */ |
| 441 | public static void setDefaultValues(Context context, int resId, boolean readAgain) { |
| 442 | |
| 443 | // Use the default shared preferences name and mode |
| 444 | setDefaultValues(context, getDefaultSharedPreferencesName(context), |
| 445 | getDefaultSharedPreferencesMode(), resId, readAgain); |
| 446 | } |
| 447 | |
| 448 | /** |
| 449 | * Similar to {@link #setDefaultValues(Context, int, boolean)} but allows |
| 450 | * the client to provide the filename and mode of the shared preferences |
| 451 | * file. |
Scott Main | bbb3f41 | 2012-03-09 19:10:40 -0800 | [diff] [blame] | 452 | * |
| 453 | * @param context The context of the shared preferences. |
| 454 | * @param sharedPreferencesName A custom name for the shared preferences file. |
| 455 | * @param sharedPreferencesMode The file creation mode for the shared preferences file, such |
| 456 | * as {@link android.content.Context#MODE_PRIVATE} or {@link |
| 457 | * android.content.Context#MODE_PRIVATE} |
| 458 | * @param resId The resource ID of the preference XML file. |
| 459 | * @param readAgain Whether to re-read the default values. |
| 460 | * If false, this method will set the default values only if this |
| 461 | * method has never been called in the past (or if the |
| 462 | * {@link #KEY_HAS_SET_DEFAULT_VALUES} in the default value shared |
| 463 | * preferences file is false). To attempt to set the default values again |
| 464 | * bypassing this check, set {@code readAgain} to true. |
| 465 | * <p class="note"> |
| 466 | * Note: this will NOT reset preferences back to their default |
| 467 | * values. For that functionality, use |
| 468 | * {@link PreferenceManager#getDefaultSharedPreferences(Context)} |
| 469 | * and clear it followed by a call to this method with this |
| 470 | * parameter set to true. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 471 | * |
| 472 | * @see #setDefaultValues(Context, int, boolean) |
| 473 | * @see #setSharedPreferencesName(String) |
| 474 | * @see #setSharedPreferencesMode(int) |
| 475 | */ |
| 476 | public static void setDefaultValues(Context context, String sharedPreferencesName, |
| 477 | int sharedPreferencesMode, int resId, boolean readAgain) { |
| 478 | final SharedPreferences defaultValueSp = context.getSharedPreferences( |
| 479 | KEY_HAS_SET_DEFAULT_VALUES, Context.MODE_PRIVATE); |
| 480 | |
| 481 | if (readAgain || !defaultValueSp.getBoolean(KEY_HAS_SET_DEFAULT_VALUES, false)) { |
| 482 | final PreferenceManager pm = new PreferenceManager(context); |
| 483 | pm.setSharedPreferencesName(sharedPreferencesName); |
| 484 | pm.setSharedPreferencesMode(sharedPreferencesMode); |
| 485 | pm.inflateFromResource(context, resId, null); |
| 486 | |
Brad Fitzpatrick | dd644c1 | 2010-10-10 10:58:47 -0700 | [diff] [blame] | 487 | SharedPreferences.Editor editor = |
| 488 | defaultValueSp.edit().putBoolean(KEY_HAS_SET_DEFAULT_VALUES, true); |
| 489 | try { |
| 490 | editor.apply(); |
| 491 | } catch (AbstractMethodError unused) { |
| 492 | // The app injected its own pre-Gingerbread |
| 493 | // SharedPreferences.Editor implementation without |
| 494 | // an apply method. |
| 495 | editor.commit(); |
| 496 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 497 | } |
| 498 | } |
| 499 | |
| 500 | /** |
| 501 | * Returns an editor to use when modifying the shared preferences. |
| 502 | * <p> |
| 503 | * Do NOT commit unless {@link #shouldCommit()} returns true. |
| 504 | * |
| 505 | * @return An editor to use to write to shared preferences. |
| 506 | * @see #shouldCommit() |
| 507 | */ |
| 508 | SharedPreferences.Editor getEditor() { |
| 509 | |
| 510 | if (mNoCommit) { |
| 511 | if (mEditor == null) { |
| 512 | mEditor = getSharedPreferences().edit(); |
| 513 | } |
| 514 | |
| 515 | return mEditor; |
| 516 | } else { |
| 517 | return getSharedPreferences().edit(); |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | /** |
| 522 | * Whether it is the client's responsibility to commit on the |
| 523 | * {@link #getEditor()}. This will return false in cases where the writes |
| 524 | * should be batched, for example when inflating preferences from XML. |
| 525 | * |
| 526 | * @return Whether the client should commit. |
| 527 | */ |
| 528 | boolean shouldCommit() { |
| 529 | return !mNoCommit; |
| 530 | } |
Brad Fitzpatrick | dd644c1 | 2010-10-10 10:58:47 -0700 | [diff] [blame] | 531 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 532 | private void setNoCommit(boolean noCommit) { |
| 533 | if (!noCommit && mEditor != null) { |
Brad Fitzpatrick | dd644c1 | 2010-10-10 10:58:47 -0700 | [diff] [blame] | 534 | try { |
| 535 | mEditor.apply(); |
| 536 | } catch (AbstractMethodError unused) { |
| 537 | // The app injected its own pre-Gingerbread |
| 538 | // SharedPreferences.Editor implementation without |
| 539 | // an apply method. |
| 540 | mEditor.commit(); |
| 541 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 542 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 543 | mNoCommit = noCommit; |
| 544 | } |
Brad Fitzpatrick | dd644c1 | 2010-10-10 10:58:47 -0700 | [diff] [blame] | 545 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 546 | /** |
| 547 | * Returns the activity that shows the preferences. This is useful for doing |
| 548 | * managed queries, but in most cases the use of {@link #getContext()} is |
| 549 | * preferred. |
| 550 | * <p> |
| 551 | * This will return null if this class was instantiated with a Context |
| 552 | * instead of Activity. For example, when setting the default values. |
| 553 | * |
| 554 | * @return The activity that shows the preferences. |
| 555 | * @see #mContext |
| 556 | */ |
| 557 | Activity getActivity() { |
| 558 | return mActivity; |
| 559 | } |
| 560 | |
| 561 | /** |
| 562 | * Returns the context. This is preferred over {@link #getActivity()} when |
| 563 | * possible. |
| 564 | * |
| 565 | * @return The context. |
| 566 | */ |
| 567 | Context getContext() { |
| 568 | return mContext; |
| 569 | } |
| 570 | |
| 571 | /** |
| 572 | * Registers a listener. |
| 573 | * |
| 574 | * @see OnActivityResultListener |
| 575 | */ |
| 576 | void registerOnActivityResultListener(OnActivityResultListener listener) { |
| 577 | synchronized (this) { |
| 578 | if (mActivityResultListeners == null) { |
| 579 | mActivityResultListeners = new ArrayList<OnActivityResultListener>(); |
| 580 | } |
| 581 | |
| 582 | if (!mActivityResultListeners.contains(listener)) { |
| 583 | mActivityResultListeners.add(listener); |
| 584 | } |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | /** |
| 589 | * Unregisters a listener. |
| 590 | * |
| 591 | * @see OnActivityResultListener |
| 592 | */ |
| 593 | void unregisterOnActivityResultListener(OnActivityResultListener listener) { |
| 594 | synchronized (this) { |
| 595 | if (mActivityResultListeners != null) { |
| 596 | mActivityResultListeners.remove(listener); |
| 597 | } |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | /** |
| 602 | * Called by the {@link PreferenceManager} to dispatch a subactivity result. |
| 603 | */ |
| 604 | void dispatchActivityResult(int requestCode, int resultCode, Intent data) { |
| 605 | List<OnActivityResultListener> list; |
| 606 | |
| 607 | synchronized (this) { |
| 608 | if (mActivityResultListeners == null) return; |
| 609 | list = new ArrayList<OnActivityResultListener>(mActivityResultListeners); |
| 610 | } |
| 611 | |
| 612 | final int N = list.size(); |
| 613 | for (int i = 0; i < N; i++) { |
| 614 | if (list.get(i).onActivityResult(requestCode, resultCode, data)) { |
| 615 | break; |
| 616 | } |
| 617 | } |
| 618 | } |
| 619 | |
| 620 | /** |
| 621 | * Registers a listener. |
| 622 | * |
| 623 | * @see OnActivityStopListener |
| 624 | */ |
| 625 | void registerOnActivityStopListener(OnActivityStopListener listener) { |
| 626 | synchronized (this) { |
| 627 | if (mActivityStopListeners == null) { |
| 628 | mActivityStopListeners = new ArrayList<OnActivityStopListener>(); |
| 629 | } |
| 630 | |
| 631 | if (!mActivityStopListeners.contains(listener)) { |
| 632 | mActivityStopListeners.add(listener); |
| 633 | } |
| 634 | } |
| 635 | } |
| 636 | |
| 637 | /** |
| 638 | * Unregisters a listener. |
| 639 | * |
| 640 | * @see OnActivityStopListener |
| 641 | */ |
| 642 | void unregisterOnActivityStopListener(OnActivityStopListener listener) { |
| 643 | synchronized (this) { |
| 644 | if (mActivityStopListeners != null) { |
| 645 | mActivityStopListeners.remove(listener); |
| 646 | } |
| 647 | } |
| 648 | } |
| 649 | |
| 650 | /** |
| 651 | * Called by the {@link PreferenceManager} to dispatch the activity stop |
| 652 | * event. |
| 653 | */ |
| 654 | void dispatchActivityStop() { |
| 655 | List<OnActivityStopListener> list; |
| 656 | |
| 657 | synchronized (this) { |
| 658 | if (mActivityStopListeners == null) return; |
| 659 | list = new ArrayList<OnActivityStopListener>(mActivityStopListeners); |
| 660 | } |
| 661 | |
| 662 | final int N = list.size(); |
| 663 | for (int i = 0; i < N; i++) { |
| 664 | list.get(i).onActivityStop(); |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | /** |
| 669 | * Registers a listener. |
| 670 | * |
| 671 | * @see OnActivityDestroyListener |
| 672 | */ |
| 673 | void registerOnActivityDestroyListener(OnActivityDestroyListener listener) { |
| 674 | synchronized (this) { |
| 675 | if (mActivityDestroyListeners == null) { |
| 676 | mActivityDestroyListeners = new ArrayList<OnActivityDestroyListener>(); |
| 677 | } |
| 678 | |
| 679 | if (!mActivityDestroyListeners.contains(listener)) { |
| 680 | mActivityDestroyListeners.add(listener); |
| 681 | } |
| 682 | } |
| 683 | } |
| 684 | |
| 685 | /** |
| 686 | * Unregisters a listener. |
| 687 | * |
| 688 | * @see OnActivityDestroyListener |
| 689 | */ |
| 690 | void unregisterOnActivityDestroyListener(OnActivityDestroyListener listener) { |
| 691 | synchronized (this) { |
| 692 | if (mActivityDestroyListeners != null) { |
| 693 | mActivityDestroyListeners.remove(listener); |
| 694 | } |
| 695 | } |
| 696 | } |
| 697 | |
| 698 | /** |
| 699 | * Called by the {@link PreferenceManager} to dispatch the activity destroy |
| 700 | * event. |
| 701 | */ |
| 702 | void dispatchActivityDestroy() { |
| 703 | List<OnActivityDestroyListener> list = null; |
| 704 | |
| 705 | synchronized (this) { |
| 706 | if (mActivityDestroyListeners != null) { |
| 707 | list = new ArrayList<OnActivityDestroyListener>(mActivityDestroyListeners); |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | if (list != null) { |
| 712 | final int N = list.size(); |
| 713 | for (int i = 0; i < N; i++) { |
| 714 | list.get(i).onActivityDestroy(); |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | // Dismiss any PreferenceScreens still showing |
| 719 | dismissAllScreens(); |
| 720 | } |
| 721 | |
| 722 | /** |
| 723 | * Returns a request code that is unique for the activity. Each subsequent |
| 724 | * call to this method should return another unique request code. |
| 725 | * |
| 726 | * @return A unique request code that will never be used by anyone other |
| 727 | * than the caller of this method. |
| 728 | */ |
| 729 | int getNextRequestCode() { |
| 730 | synchronized (this) { |
| 731 | return mNextRequestCode++; |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | void addPreferencesScreen(DialogInterface screen) { |
| 736 | synchronized (this) { |
| 737 | |
| 738 | if (mPreferencesScreens == null) { |
| 739 | mPreferencesScreens = new ArrayList<DialogInterface>(); |
| 740 | } |
| 741 | |
| 742 | mPreferencesScreens.add(screen); |
| 743 | } |
| 744 | } |
| 745 | |
| 746 | void removePreferencesScreen(DialogInterface screen) { |
| 747 | synchronized (this) { |
| 748 | |
| 749 | if (mPreferencesScreens == null) { |
| 750 | return; |
| 751 | } |
| 752 | |
| 753 | mPreferencesScreens.remove(screen); |
| 754 | } |
| 755 | } |
| 756 | |
| 757 | /** |
| 758 | * Called by {@link PreferenceActivity} to dispatch the new Intent event. |
| 759 | * |
| 760 | * @param intent The new Intent. |
| 761 | */ |
| 762 | void dispatchNewIntent(Intent intent) { |
| 763 | dismissAllScreens(); |
| 764 | } |
| 765 | |
| 766 | private void dismissAllScreens() { |
| 767 | // Remove any of the previously shown preferences screens |
| 768 | ArrayList<DialogInterface> screensToDismiss; |
| 769 | |
| 770 | synchronized (this) { |
| 771 | |
| 772 | if (mPreferencesScreens == null) { |
| 773 | return; |
| 774 | } |
| 775 | |
| 776 | screensToDismiss = new ArrayList<DialogInterface>(mPreferencesScreens); |
| 777 | mPreferencesScreens.clear(); |
| 778 | } |
| 779 | |
| 780 | for (int i = screensToDismiss.size() - 1; i >= 0; i--) { |
| 781 | screensToDismiss.get(i).dismiss(); |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | /** |
| 786 | * Sets the callback to be invoked when a {@link Preference} in the |
| 787 | * hierarchy rooted at this {@link PreferenceManager} is clicked. |
| 788 | * |
| 789 | * @param listener The callback to be invoked. |
| 790 | */ |
| 791 | void setOnPreferenceTreeClickListener(OnPreferenceTreeClickListener listener) { |
| 792 | mOnPreferenceTreeClickListener = listener; |
| 793 | } |
| 794 | |
| 795 | OnPreferenceTreeClickListener getOnPreferenceTreeClickListener() { |
| 796 | return mOnPreferenceTreeClickListener; |
| 797 | } |
| 798 | |
| 799 | /** |
| 800 | * Interface definition for a callback to be invoked when a |
| 801 | * {@link Preference} in the hierarchy rooted at this {@link PreferenceScreen} is |
| 802 | * clicked. |
| 803 | */ |
| 804 | interface OnPreferenceTreeClickListener { |
| 805 | /** |
| 806 | * Called when a preference in the tree rooted at this |
| 807 | * {@link PreferenceScreen} has been clicked. |
| 808 | * |
| 809 | * @param preferenceScreen The {@link PreferenceScreen} that the |
| 810 | * preference is located in. |
| 811 | * @param preference The preference that was clicked. |
| 812 | * @return Whether the click was handled. |
| 813 | */ |
| 814 | boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference); |
| 815 | } |
| 816 | |
| 817 | /** |
| 818 | * Interface definition for a class that will be called when the container's activity |
| 819 | * receives an activity result. |
| 820 | */ |
| 821 | public interface OnActivityResultListener { |
| 822 | |
| 823 | /** |
| 824 | * See Activity's onActivityResult. |
| 825 | * |
| 826 | * @return Whether the request code was handled (in which case |
| 827 | * subsequent listeners will not be called. |
| 828 | */ |
| 829 | boolean onActivityResult(int requestCode, int resultCode, Intent data); |
| 830 | } |
| 831 | |
| 832 | /** |
| 833 | * Interface definition for a class that will be called when the container's activity |
| 834 | * is stopped. |
| 835 | */ |
| 836 | public interface OnActivityStopListener { |
| 837 | |
| 838 | /** |
| 839 | * See Activity's onStop. |
| 840 | */ |
| 841 | void onActivityStop(); |
| 842 | } |
| 843 | |
| 844 | /** |
| 845 | * Interface definition for a class that will be called when the container's activity |
| 846 | * is destroyed. |
| 847 | */ |
| 848 | public interface OnActivityDestroyListener { |
| 849 | |
| 850 | /** |
| 851 | * See Activity's onDestroy. |
| 852 | */ |
| 853 | void onActivityDestroy(); |
| 854 | } |
| 855 | |
| 856 | } |