The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.app; |
| 18 | |
| 19 | import android.content.Intent; |
| 20 | import android.content.pm.ActivityInfo; |
| 21 | import android.os.Binder; |
| 22 | import android.os.Bundle; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 23 | import android.util.Log; |
| 24 | import android.view.Window; |
| 25 | |
| 26 | import java.util.ArrayList; |
| 27 | import java.util.HashMap; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 28 | import java.util.Map; |
| 29 | |
| 30 | /** |
| 31 | * Helper class for managing multiple running embedded activities in the same |
| 32 | * process. This class is not normally used directly, but rather created for |
| 33 | * you as part of the {@link android.app.ActivityGroup} implementation. |
| 34 | * |
| 35 | * @see ActivityGroup |
| 36 | */ |
| 37 | public class LocalActivityManager { |
| 38 | private static final String TAG = "LocalActivityManager"; |
Romain Guy | d315ee9 | 2010-06-03 11:03:18 -0700 | [diff] [blame] | 39 | private static final boolean localLOGV = false; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 40 | |
| 41 | // Internal token for an Activity being managed by LocalActivityManager. |
| 42 | private static class LocalActivityRecord extends Binder { |
| 43 | LocalActivityRecord(String _id, Intent _intent) { |
| 44 | id = _id; |
| 45 | intent = _intent; |
| 46 | } |
| 47 | |
| 48 | final String id; // Unique name of this record. |
| 49 | Intent intent; // Which activity to run here. |
| 50 | ActivityInfo activityInfo; // Package manager info about activity. |
| 51 | Activity activity; // Currently instantiated activity. |
| 52 | Window window; // Activity's top-level window. |
| 53 | Bundle instanceState; // Last retrieved freeze state. |
| 54 | int curState = RESTORED; // Current state the activity is in. |
| 55 | } |
| 56 | |
| 57 | static final int RESTORED = 0; // State restored, but no startActivity(). |
| 58 | static final int INITIALIZING = 1; // Ready to launch (after startActivity()). |
| 59 | static final int CREATED = 2; // Created, not started or resumed. |
| 60 | static final int STARTED = 3; // Created and started, not resumed. |
| 61 | static final int RESUMED = 4; // Created started and resumed. |
| 62 | static final int DESTROYED = 5; // No longer with us. |
| 63 | |
| 64 | /** Thread our activities are running in. */ |
| 65 | private final ActivityThread mActivityThread; |
| 66 | /** The containing activity that owns the activities we create. */ |
| 67 | private final Activity mParent; |
| 68 | |
| 69 | /** The activity that is currently resumed. */ |
| 70 | private LocalActivityRecord mResumed; |
| 71 | /** id -> record of all known activities. */ |
| 72 | private final Map<String, LocalActivityRecord> mActivities |
| 73 | = new HashMap<String, LocalActivityRecord>(); |
| 74 | /** array of all known activities for easy iterating. */ |
| 75 | private final ArrayList<LocalActivityRecord> mActivityArray |
| 76 | = new ArrayList<LocalActivityRecord>(); |
| 77 | |
| 78 | /** True if only one activity can be resumed at a time */ |
| 79 | private boolean mSingleMode; |
| 80 | |
| 81 | /** Set to true once we find out the container is finishing. */ |
| 82 | private boolean mFinishing; |
| 83 | |
| 84 | /** Current state the owner (ActivityGroup) is in */ |
| 85 | private int mCurState = INITIALIZING; |
| 86 | |
| 87 | /** String ids of running activities starting with least recently used. */ |
| 88 | // TODO: put back in stopping of activities. |
| 89 | //private List<LocalActivityRecord> mLRU = new ArrayList(); |
| 90 | |
| 91 | /** |
| 92 | * Create a new LocalActivityManager for holding activities running within |
| 93 | * the given <var>parent</var>. |
| 94 | * |
| 95 | * @param parent the host of the embedded activities |
| 96 | * @param singleMode True if the LocalActivityManger should keep a maximum |
| 97 | * of one activity resumed |
| 98 | */ |
| 99 | public LocalActivityManager(Activity parent, boolean singleMode) { |
| 100 | mActivityThread = ActivityThread.currentActivityThread(); |
| 101 | mParent = parent; |
| 102 | mSingleMode = singleMode; |
| 103 | } |
| 104 | |
| 105 | private void moveToState(LocalActivityRecord r, int desiredState) { |
| 106 | if (r.curState == RESTORED || r.curState == DESTROYED) { |
| 107 | // startActivity() has not yet been called, so nothing to do. |
| 108 | return; |
| 109 | } |
| 110 | |
| 111 | if (r.curState == INITIALIZING) { |
| 112 | // Get the lastNonConfigurationInstance for the activity |
Dianne Hackborn | b4bc78b | 2010-05-12 18:59:50 -0700 | [diff] [blame] | 113 | HashMap<String, Object> lastNonConfigurationInstances = |
| 114 | mParent.getLastNonConfigurationChildInstances(); |
| 115 | Object instanceObj = null; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 116 | if (lastNonConfigurationInstances != null) { |
Dianne Hackborn | b4bc78b | 2010-05-12 18:59:50 -0700 | [diff] [blame] | 117 | instanceObj = lastNonConfigurationInstances.get(r.id); |
| 118 | } |
| 119 | Activity.NonConfigurationInstances instance = null; |
| 120 | if (instanceObj != null) { |
| 121 | instance = new Activity.NonConfigurationInstances(); |
| 122 | instance.activity = instanceObj; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 123 | } |
| 124 | |
| 125 | // We need to have always created the activity. |
| 126 | if (localLOGV) Log.v(TAG, r.id + ": starting " + r.intent); |
| 127 | if (r.activityInfo == null) { |
| 128 | r.activityInfo = mActivityThread.resolveActivityInfo(r.intent); |
| 129 | } |
| 130 | r.activity = mActivityThread.startActivityNow( |
| 131 | mParent, r.id, r.intent, r.activityInfo, r, r.instanceState, instance); |
| 132 | if (r.activity == null) { |
| 133 | return; |
| 134 | } |
| 135 | r.window = r.activity.getWindow(); |
| 136 | r.instanceState = null; |
| 137 | r.curState = STARTED; |
| 138 | |
| 139 | if (desiredState == RESUMED) { |
| 140 | if (localLOGV) Log.v(TAG, r.id + ": resuming"); |
| 141 | mActivityThread.performResumeActivity(r, true); |
| 142 | r.curState = RESUMED; |
| 143 | } |
| 144 | |
| 145 | // Don't do anything more here. There is an important case: |
| 146 | // if this is being done as part of onCreate() of the group, then |
| 147 | // the launching of the activity gets its state a little ahead |
| 148 | // of our own (it is now STARTED, while we are only CREATED). |
| 149 | // If we just leave things as-is, we'll deal with it as the |
| 150 | // group's state catches up. |
| 151 | return; |
| 152 | } |
| 153 | |
| 154 | switch (r.curState) { |
| 155 | case CREATED: |
| 156 | if (desiredState == STARTED) { |
| 157 | if (localLOGV) Log.v(TAG, r.id + ": restarting"); |
| 158 | mActivityThread.performRestartActivity(r); |
| 159 | r.curState = STARTED; |
| 160 | } |
| 161 | if (desiredState == RESUMED) { |
| 162 | if (localLOGV) Log.v(TAG, r.id + ": restarting and resuming"); |
| 163 | mActivityThread.performRestartActivity(r); |
| 164 | mActivityThread.performResumeActivity(r, true); |
| 165 | r.curState = RESUMED; |
| 166 | } |
| 167 | return; |
| 168 | |
| 169 | case STARTED: |
| 170 | if (desiredState == RESUMED) { |
| 171 | // Need to resume it... |
| 172 | if (localLOGV) Log.v(TAG, r.id + ": resuming"); |
| 173 | mActivityThread.performResumeActivity(r, true); |
| 174 | r.instanceState = null; |
| 175 | r.curState = RESUMED; |
| 176 | } |
| 177 | if (desiredState == CREATED) { |
| 178 | if (localLOGV) Log.v(TAG, r.id + ": stopping"); |
Dianne Hackborn | 0aae2d4 | 2010-12-07 23:51:29 -0800 | [diff] [blame] | 179 | mActivityThread.performStopActivity(r, false); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 180 | r.curState = CREATED; |
| 181 | } |
| 182 | return; |
| 183 | |
| 184 | case RESUMED: |
| 185 | if (desiredState == STARTED) { |
| 186 | if (localLOGV) Log.v(TAG, r.id + ": pausing"); |
| 187 | performPause(r, mFinishing); |
| 188 | r.curState = STARTED; |
| 189 | } |
| 190 | if (desiredState == CREATED) { |
| 191 | if (localLOGV) Log.v(TAG, r.id + ": pausing"); |
| 192 | performPause(r, mFinishing); |
| 193 | if (localLOGV) Log.v(TAG, r.id + ": stopping"); |
Dianne Hackborn | 0aae2d4 | 2010-12-07 23:51:29 -0800 | [diff] [blame] | 194 | mActivityThread.performStopActivity(r, false); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 195 | r.curState = CREATED; |
| 196 | } |
| 197 | return; |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | private void performPause(LocalActivityRecord r, boolean finishing) { |
| 202 | boolean needState = r.instanceState == null; |
| 203 | Bundle instanceState = mActivityThread.performPauseActivity(r, |
| 204 | finishing, needState); |
| 205 | if (needState) { |
| 206 | r.instanceState = instanceState; |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | /** |
| 211 | * Start a new activity running in the group. Every activity you start |
| 212 | * must have a unique string ID associated with it -- this is used to keep |
| 213 | * track of the activity, so that if you later call startActivity() again |
| 214 | * on it the same activity object will be retained. |
| 215 | * |
| 216 | * <p>When there had previously been an activity started under this id, |
| 217 | * it may either be destroyed and a new one started, or the current |
| 218 | * one re-used, based on these conditions, in order:</p> |
| 219 | * |
| 220 | * <ul> |
| 221 | * <li> If the Intent maps to a different activity component than is |
| 222 | * currently running, the current activity is finished and a new one |
| 223 | * started. |
| 224 | * <li> If the current activity uses a non-multiple launch mode (such |
| 225 | * as singleTop), or the Intent has the |
| 226 | * {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag set, then the current |
| 227 | * activity will remain running and its |
| 228 | * {@link Activity#onNewIntent(Intent) Activity.onNewIntent()} method |
| 229 | * called. |
| 230 | * <li> If the new Intent is the same (excluding extras) as the previous |
| 231 | * one, and the new Intent does not have the |
| 232 | * {@link Intent#FLAG_ACTIVITY_CLEAR_TOP} set, then the current activity |
| 233 | * will remain running as-is. |
| 234 | * <li> Otherwise, the current activity will be finished and a new |
| 235 | * one started. |
| 236 | * </ul> |
| 237 | * |
| 238 | * <p>If the given Intent can not be resolved to an available Activity, |
| 239 | * this method throws {@link android.content.ActivityNotFoundException}. |
| 240 | * |
| 241 | * <p>Warning: There is an issue where, if the Intent does not |
| 242 | * include an explicit component, we can restore the state for a different |
| 243 | * activity class than was previously running when the state was saved (if |
| 244 | * the set of available activities changes between those points). |
| 245 | * |
| 246 | * @param id Unique identifier of the activity to be started |
| 247 | * @param intent The Intent describing the activity to be started |
| 248 | * |
| 249 | * @return Returns the window of the activity. The caller needs to take |
| 250 | * care of adding this window to a view hierarchy, and likewise dealing |
| 251 | * with removing the old window if the activity has changed. |
| 252 | * |
| 253 | * @throws android.content.ActivityNotFoundException |
| 254 | */ |
| 255 | public Window startActivity(String id, Intent intent) { |
| 256 | if (mCurState == INITIALIZING) { |
| 257 | throw new IllegalStateException( |
| 258 | "Activities can't be added until the containing group has been created."); |
| 259 | } |
| 260 | |
| 261 | boolean adding = false; |
| 262 | boolean sameIntent = false; |
| 263 | |
| 264 | ActivityInfo aInfo = null; |
| 265 | |
| 266 | // Already have information about the new activity id? |
| 267 | LocalActivityRecord r = mActivities.get(id); |
| 268 | if (r == null) { |
| 269 | // Need to create it... |
| 270 | r = new LocalActivityRecord(id, intent); |
| 271 | adding = true; |
| 272 | } else if (r.intent != null) { |
| 273 | sameIntent = r.intent.filterEquals(intent); |
| 274 | if (sameIntent) { |
| 275 | // We are starting the same activity. |
| 276 | aInfo = r.activityInfo; |
| 277 | } |
| 278 | } |
| 279 | if (aInfo == null) { |
| 280 | aInfo = mActivityThread.resolveActivityInfo(intent); |
| 281 | } |
| 282 | |
| 283 | // Pause the currently running activity if there is one and only a single |
| 284 | // activity is allowed to be running at a time. |
| 285 | if (mSingleMode) { |
| 286 | LocalActivityRecord old = mResumed; |
| 287 | |
| 288 | // If there was a previous activity, and it is not the current |
| 289 | // activity, we need to stop it. |
| 290 | if (old != null && old != r && mCurState == RESUMED) { |
| 291 | moveToState(old, STARTED); |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | if (adding) { |
| 296 | // It's a brand new world. |
| 297 | mActivities.put(id, r); |
| 298 | mActivityArray.add(r); |
| 299 | } else if (r.activityInfo != null) { |
| 300 | // If the new activity is the same as the current one, then |
| 301 | // we may be able to reuse it. |
| 302 | if (aInfo == r.activityInfo || |
| 303 | (aInfo.name.equals(r.activityInfo.name) && |
| 304 | aInfo.packageName.equals(r.activityInfo.packageName))) { |
| 305 | if (aInfo.launchMode != ActivityInfo.LAUNCH_MULTIPLE || |
| 306 | (intent.getFlags()&Intent.FLAG_ACTIVITY_SINGLE_TOP) != 0) { |
| 307 | // The activity wants onNewIntent() called. |
| 308 | ArrayList<Intent> intents = new ArrayList<Intent>(1); |
| 309 | intents.add(intent); |
| 310 | if (localLOGV) Log.v(TAG, r.id + ": new intent"); |
| 311 | mActivityThread.performNewIntents(r, intents); |
| 312 | r.intent = intent; |
| 313 | moveToState(r, mCurState); |
| 314 | if (mSingleMode) { |
| 315 | mResumed = r; |
| 316 | } |
| 317 | return r.window; |
| 318 | } |
| 319 | if (sameIntent && |
| 320 | (intent.getFlags()&Intent.FLAG_ACTIVITY_CLEAR_TOP) == 0) { |
| 321 | // We are showing the same thing, so this activity is |
| 322 | // just resumed and stays as-is. |
| 323 | r.intent = intent; |
| 324 | moveToState(r, mCurState); |
| 325 | if (mSingleMode) { |
| 326 | mResumed = r; |
| 327 | } |
| 328 | return r.window; |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | // The new activity is different than the current one, or it |
| 333 | // is a multiple launch activity, so we need to destroy what |
| 334 | // is currently there. |
| 335 | performDestroy(r, true); |
| 336 | } |
| 337 | |
| 338 | r.intent = intent; |
| 339 | r.curState = INITIALIZING; |
| 340 | r.activityInfo = aInfo; |
| 341 | |
| 342 | moveToState(r, mCurState); |
| 343 | |
| 344 | // When in single mode keep track of the current activity |
| 345 | if (mSingleMode) { |
| 346 | mResumed = r; |
| 347 | } |
| 348 | return r.window; |
| 349 | } |
| 350 | |
| 351 | private Window performDestroy(LocalActivityRecord r, boolean finish) { |
Romain Guy | d315ee9 | 2010-06-03 11:03:18 -0700 | [diff] [blame] | 352 | Window win; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 353 | win = r.window; |
| 354 | if (r.curState == RESUMED && !finish) { |
| 355 | performPause(r, finish); |
| 356 | } |
| 357 | if (localLOGV) Log.v(TAG, r.id + ": destroying"); |
| 358 | mActivityThread.performDestroyActivity(r, finish); |
| 359 | r.activity = null; |
| 360 | r.window = null; |
| 361 | if (finish) { |
| 362 | r.instanceState = null; |
| 363 | } |
| 364 | r.curState = DESTROYED; |
| 365 | return win; |
| 366 | } |
| 367 | |
| 368 | /** |
| 369 | * Destroy the activity associated with a particular id. This activity |
| 370 | * will go through the normal lifecycle events and fine onDestroy(), and |
| 371 | * then the id removed from the group. |
| 372 | * |
| 373 | * @param id Unique identifier of the activity to be destroyed |
| 374 | * @param finish If true, this activity will be finished, so its id and |
| 375 | * all state are removed from the group. |
| 376 | * |
| 377 | * @return Returns the window that was used to display the activity, or |
| 378 | * null if there was none. |
| 379 | */ |
| 380 | public Window destroyActivity(String id, boolean finish) { |
| 381 | LocalActivityRecord r = mActivities.get(id); |
| 382 | Window win = null; |
| 383 | if (r != null) { |
| 384 | win = performDestroy(r, finish); |
| 385 | if (finish) { |
Romain Guy | d315ee9 | 2010-06-03 11:03:18 -0700 | [diff] [blame] | 386 | mActivities.remove(id); |
| 387 | mActivityArray.remove(r); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 388 | } |
| 389 | } |
| 390 | return win; |
| 391 | } |
| 392 | |
| 393 | /** |
| 394 | * Retrieve the Activity that is currently running. |
| 395 | * |
| 396 | * @return the currently running (resumed) Activity, or null if there is |
| 397 | * not one |
| 398 | * |
| 399 | * @see #startActivity |
| 400 | * @see #getCurrentId |
| 401 | */ |
| 402 | public Activity getCurrentActivity() { |
| 403 | return mResumed != null ? mResumed.activity : null; |
| 404 | } |
| 405 | |
| 406 | /** |
| 407 | * Retrieve the ID of the activity that is currently running. |
| 408 | * |
| 409 | * @return the ID of the currently running (resumed) Activity, or null if |
| 410 | * there is not one |
| 411 | * |
| 412 | * @see #startActivity |
| 413 | * @see #getCurrentActivity |
| 414 | */ |
| 415 | public String getCurrentId() { |
| 416 | return mResumed != null ? mResumed.id : null; |
| 417 | } |
| 418 | |
| 419 | /** |
| 420 | * Return the Activity object associated with a string ID. |
| 421 | * |
| 422 | * @see #startActivity |
| 423 | * |
| 424 | * @return the associated Activity object, or null if the id is unknown or |
| 425 | * its activity is not currently instantiated |
| 426 | */ |
| 427 | public Activity getActivity(String id) { |
| 428 | LocalActivityRecord r = mActivities.get(id); |
| 429 | return r != null ? r.activity : null; |
| 430 | } |
| 431 | |
| 432 | /** |
| 433 | * Restore a state that was previously returned by {@link #saveInstanceState}. This |
| 434 | * adds to the activity group information about all activity IDs that had |
| 435 | * previously been saved, even if they have not been started yet, so if the |
| 436 | * user later navigates to them the correct state will be restored. |
| 437 | * |
| 438 | * <p>Note: This does <b>not</b> change the current running activity, or |
| 439 | * start whatever activity was previously running when the state was saved. |
| 440 | * That is up to the client to do, in whatever way it thinks is best. |
| 441 | * |
| 442 | * @param state a previously saved state; does nothing if this is null |
| 443 | * |
| 444 | * @see #saveInstanceState |
| 445 | */ |
| 446 | public void dispatchCreate(Bundle state) { |
| 447 | if (state != null) { |
Romain Guy | d315ee9 | 2010-06-03 11:03:18 -0700 | [diff] [blame] | 448 | for (String id : state.keySet()) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 449 | try { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 450 | final Bundle astate = state.getBundle(id); |
| 451 | LocalActivityRecord r = mActivities.get(id); |
| 452 | if (r != null) { |
| 453 | r.instanceState = astate; |
| 454 | } else { |
| 455 | r = new LocalActivityRecord(id, null); |
| 456 | r.instanceState = astate; |
| 457 | mActivities.put(id, r); |
| 458 | mActivityArray.add(r); |
| 459 | } |
| 460 | } catch (Exception e) { |
| 461 | // Recover from -all- app errors. |
Romain Guy | d315ee9 | 2010-06-03 11:03:18 -0700 | [diff] [blame] | 462 | Log.e(TAG, "Exception thrown when restoring LocalActivityManager state", e); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 463 | } |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | mCurState = CREATED; |
| 468 | } |
| 469 | |
| 470 | /** |
| 471 | * Retrieve the state of all activities known by the group. For |
| 472 | * activities that have previously run and are now stopped or finished, the |
| 473 | * last saved state is used. For the current running activity, its |
| 474 | * {@link Activity#onSaveInstanceState} is called to retrieve its current state. |
| 475 | * |
| 476 | * @return a Bundle holding the newly created state of all known activities |
| 477 | * |
| 478 | * @see #dispatchCreate |
| 479 | */ |
| 480 | public Bundle saveInstanceState() { |
| 481 | Bundle state = null; |
| 482 | |
| 483 | // FIXME: child activities will freeze as part of onPaused. Do we |
| 484 | // need to do this here? |
| 485 | final int N = mActivityArray.size(); |
| 486 | for (int i=0; i<N; i++) { |
| 487 | final LocalActivityRecord r = mActivityArray.get(i); |
| 488 | if (state == null) { |
| 489 | state = new Bundle(); |
| 490 | } |
| 491 | if ((r.instanceState != null || r.curState == RESUMED) |
| 492 | && r.activity != null) { |
| 493 | // We need to save the state now, if we don't currently |
| 494 | // already have it or the activity is currently resumed. |
| 495 | final Bundle childState = new Bundle(); |
Martin Hibdon | 6bcda63 | 2010-12-17 16:56:07 -0800 | [diff] [blame] | 496 | r.activity.performSaveInstanceState(childState); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 497 | r.instanceState = childState; |
| 498 | } |
| 499 | if (r.instanceState != null) { |
| 500 | state.putBundle(r.id, r.instanceState); |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | return state; |
| 505 | } |
| 506 | |
| 507 | /** |
| 508 | * Called by the container activity in its {@link Activity#onResume} so |
| 509 | * that LocalActivityManager can perform the corresponding action on the |
| 510 | * activities it holds. |
| 511 | * |
| 512 | * @see Activity#onResume |
| 513 | */ |
| 514 | public void dispatchResume() { |
| 515 | mCurState = RESUMED; |
| 516 | if (mSingleMode) { |
| 517 | if (mResumed != null) { |
| 518 | moveToState(mResumed, RESUMED); |
| 519 | } |
| 520 | } else { |
| 521 | final int N = mActivityArray.size(); |
| 522 | for (int i=0; i<N; i++) { |
| 523 | moveToState(mActivityArray.get(i), RESUMED); |
| 524 | } |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | /** |
| 529 | * Called by the container activity in its {@link Activity#onPause} so |
| 530 | * that LocalActivityManager can perform the corresponding action on the |
| 531 | * activities it holds. |
| 532 | * |
| 533 | * @param finishing set to true if the parent activity has been finished; |
| 534 | * this can be determined by calling |
| 535 | * Activity.isFinishing() |
| 536 | * |
| 537 | * @see Activity#onPause |
| 538 | * @see Activity#isFinishing |
| 539 | */ |
| 540 | public void dispatchPause(boolean finishing) { |
| 541 | if (finishing) { |
| 542 | mFinishing = true; |
| 543 | } |
| 544 | mCurState = STARTED; |
| 545 | if (mSingleMode) { |
| 546 | if (mResumed != null) { |
| 547 | moveToState(mResumed, STARTED); |
| 548 | } |
| 549 | } else { |
| 550 | final int N = mActivityArray.size(); |
| 551 | for (int i=0; i<N; i++) { |
| 552 | LocalActivityRecord r = mActivityArray.get(i); |
| 553 | if (r.curState == RESUMED) { |
| 554 | moveToState(r, STARTED); |
| 555 | } |
| 556 | } |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | /** |
| 561 | * Called by the container activity in its {@link Activity#onStop} so |
| 562 | * that LocalActivityManager can perform the corresponding action on the |
| 563 | * activities it holds. |
| 564 | * |
| 565 | * @see Activity#onStop |
| 566 | */ |
| 567 | public void dispatchStop() { |
| 568 | mCurState = CREATED; |
| 569 | final int N = mActivityArray.size(); |
| 570 | for (int i=0; i<N; i++) { |
| 571 | LocalActivityRecord r = mActivityArray.get(i); |
| 572 | moveToState(r, CREATED); |
| 573 | } |
| 574 | } |
| 575 | |
| 576 | /** |
| 577 | * Call onRetainNonConfigurationInstance on each child activity and store the |
| 578 | * results in a HashMap by id. Only construct the HashMap if there is a non-null |
| 579 | * object to store. Note that this does not support nested ActivityGroups. |
| 580 | * |
| 581 | * {@hide} |
| 582 | */ |
| 583 | public HashMap<String,Object> dispatchRetainNonConfigurationInstance() { |
| 584 | HashMap<String,Object> instanceMap = null; |
| 585 | |
| 586 | final int N = mActivityArray.size(); |
| 587 | for (int i=0; i<N; i++) { |
| 588 | LocalActivityRecord r = mActivityArray.get(i); |
| 589 | if ((r != null) && (r.activity != null)) { |
| 590 | Object instance = r.activity.onRetainNonConfigurationInstance(); |
| 591 | if (instance != null) { |
| 592 | if (instanceMap == null) { |
| 593 | instanceMap = new HashMap<String,Object>(); |
| 594 | } |
| 595 | instanceMap.put(r.id, instance); |
| 596 | } |
| 597 | } |
| 598 | } |
| 599 | return instanceMap; |
| 600 | } |
| 601 | |
| 602 | /** |
| 603 | * Remove all activities from this LocalActivityManager, performing an |
| 604 | * {@link Activity#onDestroy} on any that are currently instantiated. |
| 605 | */ |
| 606 | public void removeAllActivities() { |
| 607 | dispatchDestroy(true); |
| 608 | } |
| 609 | |
| 610 | /** |
| 611 | * Called by the container activity in its {@link Activity#onDestroy} so |
| 612 | * that LocalActivityManager can perform the corresponding action on the |
| 613 | * activities it holds. |
| 614 | * |
| 615 | * @see Activity#onDestroy |
| 616 | */ |
| 617 | public void dispatchDestroy(boolean finishing) { |
| 618 | final int N = mActivityArray.size(); |
| 619 | for (int i=0; i<N; i++) { |
| 620 | LocalActivityRecord r = mActivityArray.get(i); |
| 621 | if (localLOGV) Log.v(TAG, r.id + ": destroying"); |
| 622 | mActivityThread.performDestroyActivity(r, finishing); |
| 623 | } |
| 624 | mActivities.clear(); |
| 625 | mActivityArray.clear(); |
| 626 | } |
| 627 | } |