LoaderManager.java revision b54e7a3d9f60ac605f404f9eb3c5e92ca51bbd23
1c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn/* 2c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * Copyright (C) 2010 The Android Open Source Project 3c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * 4c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * Licensed under the Apache License, Version 2.0 (the "License"); 5c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * you may not use this file except in compliance with the License. 6c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * You may obtain a copy of the License at 7c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * 8c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * http://www.apache.org/licenses/LICENSE-2.0 9c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * 10c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * Unless required by applicable law or agreed to in writing, software 11c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * distributed under the License is distributed on an "AS IS" BASIS, 12c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * See the License for the specific language governing permissions and 14c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * limitations under the License. 15c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn */ 16c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 17c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackbornpackage android.app; 18c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 19c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackbornimport android.content.Loader; 20c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackbornimport android.os.Bundle; 21a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackbornimport android.util.DebugUtils; 225e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackbornimport android.util.Log; 23c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackbornimport android.util.SparseArray; 24c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 2530d7189067524000c738c188c4ff91f84f474d25Dianne Hackbornimport java.io.FileDescriptor; 2630d7189067524000c738c188c4ff91f84f474d25Dianne Hackbornimport java.io.PrintWriter; 270e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackbornimport java.lang.reflect.Modifier; 2830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 29c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn/** 304911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * Interface associated with an {@link Activity} or {@link Fragment} for managing 31c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * one or more {@link android.content.Loader} instances associated with it. This 32c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * helps an application manage longer-running operations in conjunction with the 33c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Activity or Fragment lifecycle; the most common use of this is with a 34c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * {@link android.content.CursorLoader}, however applications are free to write 35c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * their own loaders for loading other types of data. 36c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 37f9dd34f4d3203fd50363b3b0247c5d0db6fe2c8fDianne Hackborn * While the LoaderManager API was introduced in 38f9dd34f4d3203fd50363b3b0247c5d0db6fe2c8fDianne Hackborn * {@link android.os.Build.VERSION_CODES#HONEYCOMB}, a version of the API 39f9dd34f4d3203fd50363b3b0247c5d0db6fe2c8fDianne Hackborn * is also available for use on older platforms. See the blog post 40f9dd34f4d3203fd50363b3b0247c5d0db6fe2c8fDianne Hackborn * <a href="http://android-developers.blogspot.com/2011/03/fragments-for-all.html"> 41f9dd34f4d3203fd50363b3b0247c5d0db6fe2c8fDianne Hackborn * Fragments For All</a> for more details. 42f9dd34f4d3203fd50363b3b0247c5d0db6fe2c8fDianne Hackborn * 43c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <p>As an example, here is the full implementation of a {@link Fragment} 44c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * that displays a {@link android.widget.ListView} containing the results of 45c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * a query against the contacts content provider. It uses a 46c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * {@link android.content.CursorLoader} to manage the query on the provider. 47c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 48f9dd34f4d3203fd50363b3b0247c5d0db6fe2c8fDianne Hackborn * {@sample development/samples/ApiDemos/src/com/example/android/apis/app/LoaderCursor.java 49c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * fragment_cursor} 50b54e7a3d9f60ac605f404f9eb3c5e92ca51bbd23Joe Fernandez * 51b54e7a3d9f60ac605f404f9eb3c5e92ca51bbd23Joe Fernandez * <div class="special reference"> 52b54e7a3d9f60ac605f404f9eb3c5e92ca51bbd23Joe Fernandez * <h3>Developer Guides</h3> 53b54e7a3d9f60ac605f404f9eb3c5e92ca51bbd23Joe Fernandez * <p>For more information about using loaders, read the 54b54e7a3d9f60ac605f404f9eb3c5e92ca51bbd23Joe Fernandez * <a href="{@docRoot}guide/topics/fundamentals/loaders.html">Loaders</a> developer guide.</p> 55b54e7a3d9f60ac605f404f9eb3c5e92ca51bbd23Joe Fernandez * </div> 56c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn */ 57ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackbornpublic abstract class LoaderManager { 58c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn /** 59c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * Callback interface for a client to interact with the manager. 60c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn */ 61c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn public interface LoaderCallbacks<D> { 624911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 634911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * Instantiate and return a new Loader for the given ID. 644911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * 654911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @param id The ID whose loader is to be created. 664911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @param args Any arguments supplied by the caller. 674911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @return Return a new Loader instance that is ready to start loading. 684911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 69c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn public Loader<D> onCreateLoader(int id, Bundle args); 704911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 714911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 72fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * Called when a previously created loader has finished its load. Note 73fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * that normally an application is <em>not</em> allowed to commit fragment 74fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * transactions while in this call, since it can happen after an 7548e7b458694acdf3a4fc58e62437f1dbc4f29d83Dianne Hackborn * activity's state is saved. See {@link FragmentManager#beginTransaction() 76fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * FragmentManager.openTransaction()} for further discussion on this. 77fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * 78c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <p>This function is guaranteed to be called prior to the release of 79c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * the last data that was supplied for this Loader. At this point 80c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * you should remove all use of the old data (since it will be released 81c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * soon), but should not do your own release of the data since its Loader 82c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * owns it and will take care of that. The Loader will take care of 83c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * management of its data so you don't have to. In particular: 84c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 85c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <ul> 86c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <li> <p>The Loader will monitor for changes to the data, and report 87c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * them to you through new calls here. You should not monitor the 88c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * data yourself. For example, if the data is a {@link android.database.Cursor} 89c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * and you place it in a {@link android.widget.CursorAdapter}, use 90c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * the {@link android.widget.CursorAdapter#CursorAdapter(android.content.Context, 91c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * android.database.Cursor, int)} constructor <em>without</em> passing 92c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * in either {@link android.widget.CursorAdapter#FLAG_AUTO_REQUERY} 93c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * or {@link android.widget.CursorAdapter#FLAG_REGISTER_CONTENT_OBSERVER} 94c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * (that is, use 0 for the flags argument). This prevents the CursorAdapter 95c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * from doing its own observing of the Cursor, which is not needed since 96c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * when a change happens you will get a new Cursor throw another call 97c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * here. 98c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <li> The Loader will release the data once it knows the application 99c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * is no longer using it. For example, if the data is 100c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * a {@link android.database.Cursor} from a {@link android.content.CursorLoader}, 101c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * you should not call close() on it yourself. If the Cursor is being placed in a 102c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * {@link android.widget.CursorAdapter}, you should use the 103c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * {@link android.widget.CursorAdapter#swapCursor(android.database.Cursor)} 104c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * method so that the old Cursor is not closed. 105c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * </ul> 106c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 1074911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @param loader The Loader that has finished. 1084911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @param data The data generated by the Loader. 1094911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 110c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn public void onLoadFinished(Loader<D> loader, D data); 111c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn 112c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn /** 113c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Called when a previously created loader is being reset, and thus 114c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * making its data unavailable. The application should at this point 115c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * remove any references it has to the Loader's data. 116c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 117c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param loader The Loader that is being reset. 118c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn */ 119c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn public void onLoaderReset(Loader<D> loader); 120c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 121c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 1224911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 1234911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * Ensures a loader is initialized and active. If the loader doesn't 1244911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * already exist, one is created and (if the activity/fragment is currently 1254911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * started) starts the loader. Otherwise the last created 1264911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * loader is re-used. 1274911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * 1284911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * <p>In either case, the given callback is associated with the loader, and 1294911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * will be called as the loader state changes. If at the point of call 1304911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * the caller is in its started state, and the requested loader 1314911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * already exists and has generated its data, then 132c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * callback {@link LoaderCallbacks#onLoadFinished} will 1334911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * be called immediately (inside of this function), so you must be prepared 1344911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * for this to happen. 135c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 136c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param id A unique identifier for this loader. Can be whatever you want. 137c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Identifiers are scoped to a particular LoaderManager instance. 138c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param args Optional arguments to supply to the loader at construction. 139a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn * If a loader already exists (a new one does not need to be created), this 140a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn * parameter will be ignored and the last arguments continue to be used. 141c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param callback Interface the LoaderManager will call to report about 142c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * changes in the state of the loader. Required. 1434911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 144ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackborn public abstract <D> Loader<D> initLoader(int id, Bundle args, 1454911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn LoaderManager.LoaderCallbacks<D> callback); 1464911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 1474911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 148c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Starts a new or restarts an existing {@link android.content.Loader} in 149c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * this manager, registers the callbacks to it, 1504911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * and (if the activity/fragment is currently started) starts loading it. 1514911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * If a loader with the same id has previously been 1524911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * started it will automatically be destroyed when the new loader completes 1534911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * its work. The callback will be delivered before the old loader 1544911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * is destroyed. 155c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 156c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param id A unique identifier for this loader. Can be whatever you want. 157c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Identifiers are scoped to a particular LoaderManager instance. 158c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param args Optional arguments to supply to the loader at construction. 159c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param callback Interface the LoaderManager will call to report about 160c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * changes in the state of the loader. Required. 1614911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 162ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackborn public abstract <D> Loader<D> restartLoader(int id, Bundle args, 1634911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn LoaderManager.LoaderCallbacks<D> callback); 1644911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 1654911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 166f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn * Stops and removes the loader with the given ID. If this loader 167f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn * had previously reported data to the client through 168f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn * {@link LoaderCallbacks#onLoadFinished(Loader, Object)}, a call 169f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn * will be made to {@link LoaderCallbacks#onLoaderReset(Loader)}. 1704911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 171c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn public abstract void destroyLoader(int id); 172c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn 173c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn /** 1744911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * Return the Loader with the given id or null if no matching Loader 1754911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * is found. 1764911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 177ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackborn public abstract <D> Loader<D> getLoader(int id); 17830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 17930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn /** 18030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * Print the LoaderManager's state into the given stream. 18130d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * 18230d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * @param prefix Text to print at the front of each line. 18330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * @param fd The raw file descriptor that the dump is being sent to. 18430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * @param writer A PrintWriter to which the dump is to be set. 18530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * @param args Additional arguments to the dump request. 18630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn */ 18730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); 188a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn 189a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn /** 190a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn * Control whether the framework's internal loader manager debugging 191a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn * logs are turned on. If enabled, you will see output in logcat as 192a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn * the framework performs loader operations. 193a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn */ 194a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn public static void enableDebugLogging(boolean enabled) { 195a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn LoaderManagerImpl.DEBUG = enabled; 196a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn } 1974911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn} 1984911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 199ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackbornclass LoaderManagerImpl extends LoaderManager { 200a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn static final String TAG = "LoaderManager"; 201ec541e1787b39605200584042fa1e144923eeb4fDianne Hackborn static boolean DEBUG = false; 2025e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 2035e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // These are the currently active loaders. A loader is here 2045e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // from the time its load is started until it has been explicitly 2055e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // stopped or restarted by the application. 2064911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn final SparseArray<LoaderInfo> mLoaders = new SparseArray<LoaderInfo>(); 2075e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 2085e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // These are previously run loaders. This list is maintained internally 2095e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // to avoid destroying a loader while an application is still using it. 2105e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // It allows an application to restart a loader, but continue using its 2115e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // previously run loader until the new loader's data is available. 2124911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn final SparseArray<LoaderInfo> mInactiveLoaders = new SparseArray<LoaderInfo>(); 2135e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 214fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn Activity mActivity; 2154911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn boolean mStarted; 2164911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn boolean mRetaining; 2174911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn boolean mRetainingStarted; 2186e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 2196e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn boolean mCreatingLoader; 2204911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 221c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn final class LoaderInfo implements Loader.OnLoadCompleteListener<Object> { 2222707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn final int mId; 2232707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn final Bundle mArgs; 2242707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderManager.LoaderCallbacks<Object> mCallbacks; 2252707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn Loader<Object> mLoader; 2266e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn boolean mHaveData; 2276e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn boolean mDeliveredData; 2282707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn Object mData; 2292707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mStarted; 2302707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mRetaining; 2312707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mRetainingStarted; 232afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn boolean mReportNextStart; 2332707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mDestroyed; 2342707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mListenerRegistered; 23530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 2366e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn LoaderInfo mPendingLoader; 2376e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 2382707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn public LoaderInfo(int id, Bundle args, LoaderManager.LoaderCallbacks<Object> callbacks) { 2392707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mId = id; 2402707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mArgs = args; 2412707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mCallbacks = callbacks; 2422707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2432707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2442707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void start() { 2452707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mRetaining && mRetainingStarted) { 2462707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // Our owner is started, but we were being retained from a 2472707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // previous instance in the started state... so there is really 2482707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // nothing to do here, since the loaders are still started. 2492707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mStarted = true; 2502707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return; 2512707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2522707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2534911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn if (mStarted) { 2544911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn // If loader already started, don't restart. 2554911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn return; 2564911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn } 2574911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 2580e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn mStarted = true; 2590e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn 2605e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Starting: " + this); 2612707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mLoader == null && mCallbacks != null) { 2622707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoader = mCallbacks.onCreateLoader(mId, mArgs); 2632707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2642707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mLoader != null) { 2650e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn if (mLoader.getClass().isMemberClass() 2660e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn && !Modifier.isStatic(mLoader.getClass().getModifiers())) { 267a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn throw new IllegalArgumentException( 2680e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn "Object returned from onCreateLoader must not be a non-static inner member class: " 269a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn + mLoader); 270a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn } 2714911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn if (!mListenerRegistered) { 2724911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn mLoader.registerListener(mId, this); 2734911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn mListenerRegistered = true; 2744911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn } 2752707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoader.startLoading(); 2762707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2772707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2782707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2792707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void retain() { 2805e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Retaining: " + this); 2812707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mRetaining = true; 2822707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mRetainingStarted = mStarted; 2832707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mStarted = false; 2842707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mCallbacks = null; 2852707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2862707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2872707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void finishRetain() { 2882707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mRetaining) { 2895e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Finished Retaining: " + this); 2902707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mRetaining = false; 2912707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mStarted != mRetainingStarted) { 2922707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (!mStarted) { 2932707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // This loader was retained in a started state, but 2942707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // at the end of retaining everything our owner is 2952707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // no longer started... so make it stop. 2962707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn stop(); 2972707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2982707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 299c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 300c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn 301afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn if (mStarted && mHaveData && !mReportNextStart) { 302c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // This loader has retained its data, either completely across 303c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // a configuration change or just whatever the last data set 304c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // was after being restarted from a stop, and now at the point of 305c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // finishing the retain we find we remain started, have 306c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // our data, and the owner has a new callback... so 307c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // let's deliver the data now. 308c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn callOnLoadFinished(mLoader, mData); 3092707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3102707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3112707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 312afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn void reportStart() { 313afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn if (mStarted) { 314afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn if (mReportNextStart) { 315afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn mReportNextStart = false; 316afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn if (mHaveData) { 317afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn callOnLoadFinished(mLoader, mData); 318afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 319afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 320afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 321afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 322afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn 3232707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void stop() { 3245e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Stopping: " + this); 3252707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mStarted = false; 326debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn if (!mRetaining) { 327debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn if (mLoader != null && mListenerRegistered) { 328debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn // Let the loader know we're done with it 329debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn mListenerRegistered = false; 330debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn mLoader.unregisterListener(this); 331debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn mLoader.stopLoading(); 332debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn } 3332707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3342707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3352707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 3362707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void destroy() { 3375e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Destroying: " + this); 3382707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mDestroyed = true; 3396e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn boolean needReset = mDeliveredData; 3406e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mDeliveredData = false; 3416e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mCallbacks != null && mLoader != null && mHaveData && needReset) { 342a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " Reseting: " + this); 343c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn String lastBecause = null; 344c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn if (mActivity != null) { 345c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn lastBecause = mActivity.mFragments.mNoTransactionsBecause; 346c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mActivity.mFragments.mNoTransactionsBecause = "onLoaderReset"; 347c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 348c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn try { 349c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mCallbacks.onLoaderReset(mLoader); 350c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } finally { 351c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn if (mActivity != null) { 352c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mActivity.mFragments.mNoTransactionsBecause = lastBecause; 353c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 354c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 355c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 3562707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mCallbacks = null; 357c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mData = null; 3586e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mHaveData = false; 3592707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mLoader != null) { 3602707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mListenerRegistered) { 3612707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mListenerRegistered = false; 3622707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoader.unregisterListener(this); 3632707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 364c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mLoader.reset(); 3652707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3666e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mPendingLoader != null) { 3676e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mPendingLoader.destroy(); 3686e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 3692707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 370c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 371c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn @Override public void onLoadComplete(Loader<Object> loader, Object data) { 372a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "onLoadComplete: " + this); 3736e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 3742707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mDestroyed) { 375a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " Ignoring load complete -- destroyed"); 3762707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return; 3772707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3786e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 3796e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mLoaders.get(mId) != this) { 3806e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // This data is not coming from the current active loader. 3816e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // We don't care about it. 3826e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (DEBUG) Log.v(TAG, " Ignoring load complete -- not active"); 3836e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return; 3846e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 3856e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 3866e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn LoaderInfo pending = mPendingLoader; 3876e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (pending != null) { 3886e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // There is a new request pending and we were just 3896e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // waiting for the old one to complete before starting 3906e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // it. So now it is time, switch over to the new loader. 3916e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (DEBUG) Log.v(TAG, " Switching to pending loader: " + pending); 3926e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mPendingLoader = null; 3936e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mLoaders.put(mId, null); 3946e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn destroy(); 3956e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn installLoader(pending); 3966e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return; 3976e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 3982707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 399c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn // Notify of the new data so the app can switch out the old data before 400c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn // we try to destroy it. 4016e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mData != data || !mHaveData) { 4020e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn mData = data; 4036e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mHaveData = true; 4040e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn if (mStarted) { 4050e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn callOnLoadFinished(loader, data); 4060e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn } 407c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 408c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 409a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn //if (DEBUG) Log.v(TAG, " onLoadFinished returned: " + this); 4105e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 4115e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // We have now given the application the new loader with its 4125e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // loaded data, so it should have stopped using the previous 4135e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // loader. If there is a previous loader on the inactive list, 4145e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // clean it up. 4152707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderInfo info = mInactiveLoaders.get(mId); 4165e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (info != null && info != this) { 4176e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info.mDeliveredData = false; 4185e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn info.destroy(); 4192707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mInactiveLoaders.remove(mId); 420c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 421c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 4225e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 423fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn void callOnLoadFinished(Loader<Object> loader, Object data) { 424fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (mCallbacks != null) { 425fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn String lastBecause = null; 426fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (mActivity != null) { 427fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn lastBecause = mActivity.mFragments.mNoTransactionsBecause; 428fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mActivity.mFragments.mNoTransactionsBecause = "onLoadFinished"; 429fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 430fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn try { 431a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " onLoadFinished in " + loader + ": " 432a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn + loader.dataToString(data)); 433fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mCallbacks.onLoadFinished(loader, data); 434fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } finally { 435fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (mActivity != null) { 436fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mActivity.mFragments.mNoTransactionsBecause = lastBecause; 437fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 438fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 4396e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mDeliveredData = true; 440fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 441fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 442fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn 4435e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn @Override 4445e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn public String toString() { 4455e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn StringBuilder sb = new StringBuilder(64); 4465e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append("LoaderInfo{"); 4475e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append(Integer.toHexString(System.identityHashCode(this))); 4485e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append(" #"); 4495e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append(mId); 450a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn sb.append(" : "); 451a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn DebugUtils.buildShortClassTag(mLoader, sb); 452a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn sb.append("}}"); 45330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn return sb.toString(); 45430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 45530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 45630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 45730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print("mId="); writer.print(mId); 45830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(" mArgs="); writer.println(mArgs); 45930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print("mCallbacks="); writer.println(mCallbacks); 46030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print("mLoader="); writer.println(mLoader); 461a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (mLoader != null) { 462a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn mLoader.dump(prefix + " ", fd, writer, args); 463a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn } 4646e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mHaveData || mDeliveredData) { 4656e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn writer.print(prefix); writer.print("mHaveData="); writer.print(mHaveData); 4666e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn writer.print(" mDeliveredData="); writer.println(mDeliveredData); 4676e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn writer.print(prefix); writer.print("mData="); writer.println(mData); 4686e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 46930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print("mStarted="); writer.print(mStarted); 470afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn writer.print(" mReportNextStart="); writer.print(mReportNextStart); 471f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn writer.print(" mDestroyed="); writer.println(mDestroyed); 472afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn writer.print(prefix); writer.print("mRetaining="); writer.print(mRetaining); 473afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn writer.print(" mRetainingStarted="); writer.print(mRetainingStarted); 474afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn writer.print(" mListenerRegistered="); writer.println(mListenerRegistered); 4756e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mPendingLoader != null) { 4766e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn writer.print(prefix); writer.println("Pending Loader "); 4776e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn writer.print(mPendingLoader); writer.println(":"); 4786e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mPendingLoader.dump(prefix + " ", fd, writer, args); 4796e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 48030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 481c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 482c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 483fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn LoaderManagerImpl(Activity activity, boolean started) { 484fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mActivity = activity; 485c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn mStarted = started; 486c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 487c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 488fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn void updateActivity(Activity activity) { 489fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mActivity = activity; 490fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 491fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn 4922707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn private LoaderInfo createLoader(int id, Bundle args, 4932707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderManager.LoaderCallbacks<Object> callback) { 4942707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderInfo info = new LoaderInfo(id, args, (LoaderManager.LoaderCallbacks<Object>)callback); 4952707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn Loader<Object> loader = callback.onCreateLoader(id, args); 4962707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn info.mLoader = (Loader<Object>)loader; 4976e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return info; 4986e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 4996e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 5006e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn private LoaderInfo createAndInstallLoader(int id, Bundle args, 5016e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn LoaderManager.LoaderCallbacks<Object> callback) { 5026e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn try { 5036e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mCreatingLoader = true; 5046e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn LoaderInfo info = createLoader(id, args, callback); 5056e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn installLoader(info); 5066e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return info; 5076e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } finally { 5086e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mCreatingLoader = false; 5096e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 5106e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 5116e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 5126e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn void installLoader(LoaderInfo info) { 5136e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mLoaders.put(info.mId, info); 5142707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mStarted) { 5154911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn // The activity will start all existing loaders in it's onStart(), 5164911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn // so only start them here if we're past that point of the activitiy's 5174911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn // life cycle 5184911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn info.start(); 5192707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5202707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5212707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 5226e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn /** 5236e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * Call to initialize a particular ID with a Loader. If this ID already 5246e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * has a Loader associated with it, it is left unchanged and any previous 5256e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * callbacks replaced with the newly provided ones. If there is not currently 5266e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * a Loader for the ID, a new one is created and started. 5276e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * 5286e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * <p>This function should generally be used when a component is initializing, 5296e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * to ensure that a Loader it relies on is created. This allows it to re-use 5306e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * an existing Loader's data if there already is one, so that for example 5316e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * when an {@link Activity} is re-created after a configuration change it 5326e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * does not need to re-create its loaders. 5336e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * 5346e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * <p>Note that in the case where an existing Loader is re-used, the 5356e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * <var>args</var> given here <em>will be ignored</em> because you will 5366e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * continue using the previous Loader. 5376e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * 5386e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param id A unique (to this LoaderManager instance) identifier under 5396e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * which to manage the new Loader. 5406e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param args Optional arguments that will be propagated to 5416e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * {@link LoaderCallbacks#onCreateLoader(int, Bundle) LoaderCallbacks.onCreateLoader()}. 5426e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param callback Interface implementing management of this Loader. Required. 5436e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * Its onCreateLoader() method will be called while inside of the function to 5446e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * instantiate the Loader object. 5456e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn */ 5462707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn @SuppressWarnings("unchecked") 5472707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn public <D> Loader<D> initLoader(int id, Bundle args, LoaderManager.LoaderCallbacks<D> callback) { 5486e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mCreatingLoader) { 5496e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn throw new IllegalStateException("Called while creating a loader"); 5506e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 5516e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 5522707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderInfo info = mLoaders.get(id); 5532707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 554a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "initLoader in " + this + ": args=" + args); 5555e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 5562707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (info == null) { 5572707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // Loader doesn't already exist; create. 5586e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info = createAndInstallLoader(id, args, (LoaderManager.LoaderCallbacks<Object>)callback); 559a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " Created new loader " + info); 5602707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } else { 561a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " Re-using existing loader " + info); 5622707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn info.mCallbacks = (LoaderManager.LoaderCallbacks<Object>)callback; 5632707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5642707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 5656e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (info.mHaveData && mStarted) { 5662707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // If the loader has already generated its data, report it now. 567fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn info.callOnLoadFinished(info.mLoader, info.mData); 5682707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5692707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 5702707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return (Loader<D>)info.mLoader; 5712707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5722707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 5736e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn /** 5746e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * Call to re-create the Loader associated with a particular ID. If there 5756e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * is currently a Loader associated with this ID, it will be 5766e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * canceled/stopped/destroyed as appropriate. A new Loader with the given 5776e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * arguments will be created and its data delivered to you once available. 5786e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * 5796e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * <p>This function does some throttling of Loaders. If too many Loaders 5806e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * have been created for the given ID but not yet generated their data, 5816e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * new calls to this function will create and return a new Loader but not 5826e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * actually start it until some previous loaders have completed. 5836e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * 5846e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * <p>After calling this function, any previous Loaders associated with 5856e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * this ID will be considered invalid, and you will receive no further 5866e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * data updates from them. 5876e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * 5886e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param id A unique (to this LoaderManager instance) identifier under 5896e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * which to manage the new Loader. 5906e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param args Optional arguments that will be propagated to 5916e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * {@link LoaderCallbacks#onCreateLoader(int, Bundle) LoaderCallbacks.onCreateLoader()}. 5926e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param callback Interface implementing management of this Loader. Required. 5936e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * Its onCreateLoader() method will be called while inside of the function to 5946e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * instantiate the Loader object. 5956e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn */ 596c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn @SuppressWarnings("unchecked") 5972707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn public <D> Loader<D> restartLoader(int id, Bundle args, LoaderManager.LoaderCallbacks<D> callback) { 5986e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mCreatingLoader) { 5996e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn throw new IllegalStateException("Called while creating a loader"); 6006e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 6016e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 602c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn LoaderInfo info = mLoaders.get(id); 603a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "restartLoader in " + this + ": args=" + args); 604c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn if (info != null) { 6055e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn LoaderInfo inactive = mInactiveLoaders.get(id); 6065e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (inactive != null) { 6076e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (info.mHaveData) { 6085e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // This loader now has data... we are probably being 6095e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // called from within onLoadComplete, where we haven't 6105e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // yet destroyed the last inactive loader. So just do 6115e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // that now. 612a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " Removing last inactive loader: " + info); 6136e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn inactive.mDeliveredData = false; 6145e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn inactive.destroy(); 615260c3c77d9b340164e055f87002c64d78da6e836Dianne Hackborn info.mLoader.abandon(); 6165e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn mInactiveLoaders.put(id, info); 6175e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn } else { 6185e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // We already have an inactive loader for this ID that we are 6196e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // waiting for! What to do, what to do... 6206e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (!info.mStarted) { 6216e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // The current Loader has not been started... we thus 6226e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // have no reason to keep it around, so bam, slam, 6236e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // thank-you-ma'am. 6246e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (DEBUG) Log.v(TAG, " Current loader is stopped; replacing"); 6256e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mLoaders.put(id, null); 6266e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info.destroy(); 6276e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } else { 6286e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // Now we have three active loaders... we'll queue 6296e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // up this request to be processed once one of the other loaders 6306e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // finishes. 6316e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (info.mPendingLoader != null) { 6326e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (DEBUG) Log.v(TAG, " Removing pending loader: " + info.mPendingLoader); 6336e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info.mPendingLoader.destroy(); 6346e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info.mPendingLoader = null; 6356e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 6366e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (DEBUG) Log.v(TAG, " Enqueuing as new pending loader"); 6376e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info.mPendingLoader = createLoader(id, args, 6386e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn (LoaderManager.LoaderCallbacks<Object>)callback); 6396e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return (Loader<D>)info.mPendingLoader.mLoader; 6406e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 6415e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn } 6422707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } else { 6432707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // Keep track of the previous instance of this loader so we can destroy 6442707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // it when the new one completes. 645a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " Making last loader inactive: " + info); 646260c3c77d9b340164e055f87002c64d78da6e836Dianne Hackborn info.mLoader.abandon(); 6472707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mInactiveLoaders.put(id, info); 6482707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 649c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 650c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 6516e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info = createAndInstallLoader(id, args, (LoaderManager.LoaderCallbacks<Object>)callback); 6522707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return (Loader<D>)info.mLoader; 653c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 654c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 6556e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn /** 6566e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * Rip down, tear apart, shred to pieces a current Loader ID. After returning 6576e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * from this function, any Loader objects associated with this ID are 6586e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * destroyed. Any data associated with them is destroyed. You better not 6596e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * be using it when you do this. 6606e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param id Identifier of the Loader to be destroyed. 6616e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn */ 662c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn public void destroyLoader(int id) { 6636e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mCreatingLoader) { 6646e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn throw new IllegalStateException("Called while creating a loader"); 6656e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 6666e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 667a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "destroyLoader in " + this + " of " + id); 6682707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn int idx = mLoaders.indexOfKey(id); 6692707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (idx >= 0) { 6702707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderInfo info = mLoaders.valueAt(idx); 6712707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.removeAt(idx); 6724911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn info.destroy(); 673c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 674f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn idx = mInactiveLoaders.indexOfKey(id); 675f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn if (idx >= 0) { 676f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn LoaderInfo info = mInactiveLoaders.valueAt(idx); 677f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn mInactiveLoaders.removeAt(idx); 678f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn info.destroy(); 679f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn } 680c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 681c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 6826e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn /** 6836e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * Return the most recent Loader object associated with the 6846e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * given ID. 6856e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn */ 686c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn @SuppressWarnings("unchecked") 687c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn public <D> Loader<D> getLoader(int id) { 6886e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mCreatingLoader) { 6896e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn throw new IllegalStateException("Called while creating a loader"); 6906e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 6916e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 692c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn LoaderInfo loaderInfo = mLoaders.get(id); 693c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn if (loaderInfo != null) { 6946e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (loaderInfo.mPendingLoader != null) { 6956e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return (Loader<D>)loaderInfo.mPendingLoader.mLoader; 6966e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 6976e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return (Loader<D>)loaderInfo.mLoader; 698c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 699c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn return null; 700c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 701c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 702c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn void doStart() { 703a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "Starting in " + this); 704fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (mStarted) { 705fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn RuntimeException e = new RuntimeException("here"); 706fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn e.fillInStackTrace(); 707fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn Log.w(TAG, "Called doStart when already started: " + this, e); 708fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn return; 709fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 710fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn 711c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mStarted = true; 712c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn 713c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn // Call out to sub classes so they can start their loaders 714c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn // Let the existing loaders know that we want to be notified when a load is complete 715c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 7162707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.valueAt(i).start(); 717c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 718c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 719c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 720c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn void doStop() { 721a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "Stopping in " + this); 722fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (!mStarted) { 723fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn RuntimeException e = new RuntimeException("here"); 724fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn e.fillInStackTrace(); 725fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn Log.w(TAG, "Called doStop when not started: " + this, e); 726fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn return; 727fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 7285e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 729c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 7302707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.valueAt(i).stop(); 731c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 732c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn mStarted = false; 733c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 734c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 7352707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void doRetain() { 736a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "Retaining in " + this); 737fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (!mStarted) { 738fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn RuntimeException e = new RuntimeException("here"); 739fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn e.fillInStackTrace(); 740fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn Log.w(TAG, "Called doRetain when not started: " + this, e); 741fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn return; 742fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 7435e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 7442707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mRetaining = true; 7452707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mStarted = false; 7462707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 7472707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.valueAt(i).retain(); 7482707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 7492707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 7502707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 7512707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void finishRetain() { 752a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (mRetaining) { 753a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "Finished Retaining in " + this); 7545e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 755a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn mRetaining = false; 756a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 757a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn mLoaders.valueAt(i).finishRetain(); 758a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn } 7592707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 7602707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 7612707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 762afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn void doReportNextStart() { 763afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 764afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn mLoaders.valueAt(i).mReportNextStart = true; 765afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 766afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 767afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn 768afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn void doReportStart() { 769afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 770afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn mLoaders.valueAt(i).reportStart(); 771afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 772afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 773afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn 774c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn void doDestroy() { 7752707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (!mRetaining) { 776a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "Destroying Active in " + this); 777c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 7782707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.valueAt(i).destroy(); 779c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 780c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 7812707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 782a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "Destroying Inactive in " + this); 7832707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn for (int i = mInactiveLoaders.size()-1; i >= 0; i--) { 7842707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mInactiveLoaders.valueAt(i).destroy(); 7852707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 7862707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mInactiveLoaders.clear(); 787c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 78830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 78930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn @Override 790a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn public String toString() { 791a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn StringBuilder sb = new StringBuilder(128); 792a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn sb.append("LoaderManager{"); 793a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn sb.append(Integer.toHexString(System.identityHashCode(this))); 794a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn sb.append(" in "); 795a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn DebugUtils.buildShortClassTag(mActivity, sb); 796a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn sb.append("}}"); 797a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn return sb.toString(); 798a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn } 799a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn 800a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn @Override 80130d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 80230d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn if (mLoaders.size() > 0) { 80330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.println("Active Loaders:"); 80430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn String innerPrefix = prefix + " "; 80530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn for (int i=0; i < mLoaders.size(); i++) { 80630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn LoaderInfo li = mLoaders.valueAt(i); 80730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print(" #"); writer.print(mLoaders.keyAt(i)); 808a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn writer.print(": "); writer.println(li.toString()); 80930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn li.dump(innerPrefix, fd, writer, args); 81030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 81130d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 81230d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn if (mInactiveLoaders.size() > 0) { 81330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.println("Inactive Loaders:"); 81430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn String innerPrefix = prefix + " "; 81530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn for (int i=0; i < mInactiveLoaders.size(); i++) { 81630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn LoaderInfo li = mInactiveLoaders.valueAt(i); 81730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print(" #"); writer.print(mInactiveLoaders.keyAt(i)); 818a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn writer.print(": "); writer.println(li.toString()); 81930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn li.dump(innerPrefix, fd, writer, args); 82030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 82130d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 82230d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 823c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn} 824