LoaderManager.java revision afc4b283fdaedec9bf32492a019b43cc33edc9b6
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} 50c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn */ 51ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackbornpublic abstract class LoaderManager { 52c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn /** 53c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * Callback interface for a client to interact with the manager. 54c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn */ 55c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn public interface LoaderCallbacks<D> { 564911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 574911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * Instantiate and return a new Loader for the given ID. 584911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * 594911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @param id The ID whose loader is to be created. 604911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @param args Any arguments supplied by the caller. 614911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @return Return a new Loader instance that is ready to start loading. 624911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 63c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn public Loader<D> onCreateLoader(int id, Bundle args); 644911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 654911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 66fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * Called when a previously created loader has finished its load. Note 67fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * that normally an application is <em>not</em> allowed to commit fragment 68fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * transactions while in this call, since it can happen after an 6948e7b458694acdf3a4fc58e62437f1dbc4f29d83Dianne Hackborn * activity's state is saved. See {@link FragmentManager#beginTransaction() 70fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * FragmentManager.openTransaction()} for further discussion on this. 71fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * 72c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <p>This function is guaranteed to be called prior to the release of 73c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * the last data that was supplied for this Loader. At this point 74c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * you should remove all use of the old data (since it will be released 75c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * soon), but should not do your own release of the data since its Loader 76c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * owns it and will take care of that. The Loader will take care of 77c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * management of its data so you don't have to. In particular: 78c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 79c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <ul> 80c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <li> <p>The Loader will monitor for changes to the data, and report 81c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * them to you through new calls here. You should not monitor the 82c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * data yourself. For example, if the data is a {@link android.database.Cursor} 83c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * and you place it in a {@link android.widget.CursorAdapter}, use 84c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * the {@link android.widget.CursorAdapter#CursorAdapter(android.content.Context, 85c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * android.database.Cursor, int)} constructor <em>without</em> passing 86c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * in either {@link android.widget.CursorAdapter#FLAG_AUTO_REQUERY} 87c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * or {@link android.widget.CursorAdapter#FLAG_REGISTER_CONTENT_OBSERVER} 88c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * (that is, use 0 for the flags argument). This prevents the CursorAdapter 89c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * from doing its own observing of the Cursor, which is not needed since 90c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * when a change happens you will get a new Cursor throw another call 91c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * here. 92c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <li> The Loader will release the data once it knows the application 93c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * is no longer using it. For example, if the data is 94c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * a {@link android.database.Cursor} from a {@link android.content.CursorLoader}, 95c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * you should not call close() on it yourself. If the Cursor is being placed in a 96c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * {@link android.widget.CursorAdapter}, you should use the 97c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * {@link android.widget.CursorAdapter#swapCursor(android.database.Cursor)} 98c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * method so that the old Cursor is not closed. 99c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * </ul> 100c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 1014911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @param loader The Loader that has finished. 1024911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @param data The data generated by the Loader. 1034911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 104c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn public void onLoadFinished(Loader<D> loader, D data); 105c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn 106c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn /** 107c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Called when a previously created loader is being reset, and thus 108c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * making its data unavailable. The application should at this point 109c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * remove any references it has to the Loader's data. 110c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 111c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param loader The Loader that is being reset. 112c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn */ 113c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn public void onLoaderReset(Loader<D> loader); 114c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 115c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 1164911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 1174911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * Ensures a loader is initialized and active. If the loader doesn't 1184911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * already exist, one is created and (if the activity/fragment is currently 1194911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * started) starts the loader. Otherwise the last created 1204911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * loader is re-used. 1214911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * 1224911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * <p>In either case, the given callback is associated with the loader, and 1234911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * will be called as the loader state changes. If at the point of call 1244911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * the caller is in its started state, and the requested loader 1254911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * already exists and has generated its data, then 126c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * callback {@link LoaderCallbacks#onLoadFinished} will 1274911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * be called immediately (inside of this function), so you must be prepared 1284911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * for this to happen. 129c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 130c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param id A unique identifier for this loader. Can be whatever you want. 131c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Identifiers are scoped to a particular LoaderManager instance. 132c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param args Optional arguments to supply to the loader at construction. 133a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn * If a loader already exists (a new one does not need to be created), this 134a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn * parameter will be ignored and the last arguments continue to be used. 135c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param callback Interface the LoaderManager will call to report about 136c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * changes in the state of the loader. Required. 1374911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 138ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackborn public abstract <D> Loader<D> initLoader(int id, Bundle args, 1394911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn LoaderManager.LoaderCallbacks<D> callback); 1404911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 1414911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 142c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Starts a new or restarts an existing {@link android.content.Loader} in 143c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * this manager, registers the callbacks to it, 1444911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * and (if the activity/fragment is currently started) starts loading it. 1454911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * If a loader with the same id has previously been 1464911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * started it will automatically be destroyed when the new loader completes 1474911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * its work. The callback will be delivered before the old loader 1484911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * is destroyed. 149c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 150c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param id A unique identifier for this loader. Can be whatever you want. 151c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Identifiers are scoped to a particular LoaderManager instance. 152c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param args Optional arguments to supply to the loader at construction. 153c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param callback Interface the LoaderManager will call to report about 154c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * changes in the state of the loader. Required. 1554911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 156ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackborn public abstract <D> Loader<D> restartLoader(int id, Bundle args, 1574911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn LoaderManager.LoaderCallbacks<D> callback); 1584911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 1594911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 160f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn * Stops and removes the loader with the given ID. If this loader 161f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn * had previously reported data to the client through 162f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn * {@link LoaderCallbacks#onLoadFinished(Loader, Object)}, a call 163f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn * will be made to {@link LoaderCallbacks#onLoaderReset(Loader)}. 1644911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 165c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn public abstract void destroyLoader(int id); 166c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn 167c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn /** 1684911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * Return the Loader with the given id or null if no matching Loader 1694911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * is found. 1704911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 171ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackborn public abstract <D> Loader<D> getLoader(int id); 17230d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 17330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn /** 17430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * Print the LoaderManager's state into the given stream. 17530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * 17630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * @param prefix Text to print at the front of each line. 17730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * @param fd The raw file descriptor that the dump is being sent to. 17830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * @param writer A PrintWriter to which the dump is to be set. 17930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * @param args Additional arguments to the dump request. 18030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn */ 18130d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); 182a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn 183a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn /** 184a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn * Control whether the framework's internal loader manager debugging 185a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn * logs are turned on. If enabled, you will see output in logcat as 186a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn * the framework performs loader operations. 187a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn */ 188a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn public static void enableDebugLogging(boolean enabled) { 189a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn LoaderManagerImpl.DEBUG = enabled; 190a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn } 1914911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn} 1924911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 193ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackbornclass LoaderManagerImpl extends LoaderManager { 194a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn static final String TAG = "LoaderManager"; 195ec541e1787b39605200584042fa1e144923eeb4fDianne Hackborn static boolean DEBUG = false; 1965e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 1975e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // These are the currently active loaders. A loader is here 1985e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // from the time its load is started until it has been explicitly 1995e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // stopped or restarted by the application. 2004911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn final SparseArray<LoaderInfo> mLoaders = new SparseArray<LoaderInfo>(); 2015e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 2025e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // These are previously run loaders. This list is maintained internally 2035e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // to avoid destroying a loader while an application is still using it. 2045e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // It allows an application to restart a loader, but continue using its 2055e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // previously run loader until the new loader's data is available. 2064911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn final SparseArray<LoaderInfo> mInactiveLoaders = new SparseArray<LoaderInfo>(); 2075e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 208fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn Activity mActivity; 2094911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn boolean mStarted; 2104911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn boolean mRetaining; 2114911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn boolean mRetainingStarted; 2126e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 2136e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn boolean mCreatingLoader; 2144911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 215c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn final class LoaderInfo implements Loader.OnLoadCompleteListener<Object> { 2162707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn final int mId; 2172707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn final Bundle mArgs; 2182707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderManager.LoaderCallbacks<Object> mCallbacks; 2192707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn Loader<Object> mLoader; 2206e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn boolean mHaveData; 2216e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn boolean mDeliveredData; 2222707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn Object mData; 2232707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mStarted; 2242707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mRetaining; 2252707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mRetainingStarted; 226afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn boolean mReportNextStart; 2272707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mDestroyed; 2282707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mListenerRegistered; 22930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 2306e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn LoaderInfo mPendingLoader; 2316e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 2322707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn public LoaderInfo(int id, Bundle args, LoaderManager.LoaderCallbacks<Object> callbacks) { 2332707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mId = id; 2342707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mArgs = args; 2352707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mCallbacks = callbacks; 2362707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2372707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2382707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void start() { 2392707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mRetaining && mRetainingStarted) { 2402707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // Our owner is started, but we were being retained from a 2412707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // previous instance in the started state... so there is really 2422707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // nothing to do here, since the loaders are still started. 2432707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mStarted = true; 2442707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return; 2452707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2462707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2474911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn if (mStarted) { 2484911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn // If loader already started, don't restart. 2494911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn return; 2504911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn } 2514911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 2520e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn mStarted = true; 2530e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn 2545e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Starting: " + this); 2552707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mLoader == null && mCallbacks != null) { 2562707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoader = mCallbacks.onCreateLoader(mId, mArgs); 2572707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2582707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mLoader != null) { 2590e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn if (mLoader.getClass().isMemberClass() 2600e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn && !Modifier.isStatic(mLoader.getClass().getModifiers())) { 261a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn throw new IllegalArgumentException( 2620e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn "Object returned from onCreateLoader must not be a non-static inner member class: " 263a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn + mLoader); 264a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn } 2654911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn if (!mListenerRegistered) { 2664911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn mLoader.registerListener(mId, this); 2674911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn mListenerRegistered = true; 2684911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn } 2692707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoader.startLoading(); 2702707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2712707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2722707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2732707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void retain() { 2745e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Retaining: " + this); 2752707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mRetaining = true; 2762707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mRetainingStarted = mStarted; 2772707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mStarted = false; 2782707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mCallbacks = null; 2792707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2802707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2812707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void finishRetain() { 2822707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mRetaining) { 2835e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Finished Retaining: " + this); 2842707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mRetaining = false; 2852707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mStarted != mRetainingStarted) { 2862707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (!mStarted) { 2872707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // This loader was retained in a started state, but 2882707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // at the end of retaining everything our owner is 2892707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // no longer started... so make it stop. 2902707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn stop(); 2912707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2922707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 293c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 294c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn 295afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn if (mStarted && mHaveData && !mReportNextStart) { 296c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // This loader has retained its data, either completely across 297c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // a configuration change or just whatever the last data set 298c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // was after being restarted from a stop, and now at the point of 299c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // finishing the retain we find we remain started, have 300c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // our data, and the owner has a new callback... so 301c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // let's deliver the data now. 302c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn callOnLoadFinished(mLoader, mData); 3032707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3042707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3052707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 306afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn void reportStart() { 307afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn if (mStarted) { 308afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn if (mReportNextStart) { 309afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn mReportNextStart = false; 310afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn if (mHaveData) { 311afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn callOnLoadFinished(mLoader, mData); 312afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 313afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 314afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 315afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 316afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn 3172707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void stop() { 3185e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Stopping: " + this); 3192707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mStarted = false; 320debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn if (!mRetaining) { 321debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn if (mLoader != null && mListenerRegistered) { 322debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn // Let the loader know we're done with it 323debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn mListenerRegistered = false; 324debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn mLoader.unregisterListener(this); 325debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn mLoader.stopLoading(); 326debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn } 3272707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3282707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3292707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 3302707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void destroy() { 3315e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Destroying: " + this); 3322707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mDestroyed = true; 3336e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn boolean needReset = mDeliveredData; 3346e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mDeliveredData = false; 3356e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mCallbacks != null && mLoader != null && mHaveData && needReset) { 336a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " Reseting: " + this); 337c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn String lastBecause = null; 338c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn if (mActivity != null) { 339c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn lastBecause = mActivity.mFragments.mNoTransactionsBecause; 340c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mActivity.mFragments.mNoTransactionsBecause = "onLoaderReset"; 341c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 342c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn try { 343c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mCallbacks.onLoaderReset(mLoader); 344c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } finally { 345c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn if (mActivity != null) { 346c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mActivity.mFragments.mNoTransactionsBecause = lastBecause; 347c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 348c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 349c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 3502707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mCallbacks = null; 351c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mData = null; 3526e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mHaveData = false; 3532707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mLoader != null) { 3542707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mListenerRegistered) { 3552707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mListenerRegistered = false; 3562707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoader.unregisterListener(this); 3572707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 358c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mLoader.reset(); 3592707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3606e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mPendingLoader != null) { 3616e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mPendingLoader.destroy(); 3626e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 3632707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 364c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 365c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn @Override public void onLoadComplete(Loader<Object> loader, Object data) { 366a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "onLoadComplete: " + this); 3676e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 3682707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mDestroyed) { 369a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " Ignoring load complete -- destroyed"); 3702707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return; 3712707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3726e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 3736e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mLoaders.get(mId) != this) { 3746e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // This data is not coming from the current active loader. 3756e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // We don't care about it. 3766e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (DEBUG) Log.v(TAG, " Ignoring load complete -- not active"); 3776e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return; 3786e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 3796e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 3806e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn LoaderInfo pending = mPendingLoader; 3816e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (pending != null) { 3826e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // There is a new request pending and we were just 3836e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // waiting for the old one to complete before starting 3846e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // it. So now it is time, switch over to the new loader. 3856e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (DEBUG) Log.v(TAG, " Switching to pending loader: " + pending); 3866e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mPendingLoader = null; 3876e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mLoaders.put(mId, null); 3886e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn destroy(); 3896e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn installLoader(pending); 3906e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return; 3916e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 3922707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 393c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn // Notify of the new data so the app can switch out the old data before 394c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn // we try to destroy it. 3956e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mData != data || !mHaveData) { 3960e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn mData = data; 3976e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mHaveData = true; 3980e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn if (mStarted) { 3990e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn callOnLoadFinished(loader, data); 4000e3b8f421dfcc5363f234eb1b76479cb2fb2e8eeDianne Hackborn } 401c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 402c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 403a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn //if (DEBUG) Log.v(TAG, " onLoadFinished returned: " + this); 4045e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 4055e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // We have now given the application the new loader with its 4065e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // loaded data, so it should have stopped using the previous 4075e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // loader. If there is a previous loader on the inactive list, 4085e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // clean it up. 4092707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderInfo info = mInactiveLoaders.get(mId); 4105e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (info != null && info != this) { 4116e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info.mDeliveredData = false; 4125e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn info.destroy(); 4132707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mInactiveLoaders.remove(mId); 414c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 415c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 4165e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 417fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn void callOnLoadFinished(Loader<Object> loader, Object data) { 418fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (mCallbacks != null) { 419fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn String lastBecause = null; 420fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (mActivity != null) { 421fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn lastBecause = mActivity.mFragments.mNoTransactionsBecause; 422fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mActivity.mFragments.mNoTransactionsBecause = "onLoadFinished"; 423fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 424fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn try { 425a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " onLoadFinished in " + loader + ": " 426a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn + loader.dataToString(data)); 427fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mCallbacks.onLoadFinished(loader, data); 428fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } finally { 429fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (mActivity != null) { 430fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mActivity.mFragments.mNoTransactionsBecause = lastBecause; 431fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 432fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 4336e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mDeliveredData = true; 434fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 435fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 436fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn 4375e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn @Override 4385e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn public String toString() { 4395e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn StringBuilder sb = new StringBuilder(64); 4405e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append("LoaderInfo{"); 4415e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append(Integer.toHexString(System.identityHashCode(this))); 4425e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append(" #"); 4435e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append(mId); 444a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn sb.append(" : "); 445a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn DebugUtils.buildShortClassTag(mLoader, sb); 446a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn sb.append("}}"); 44730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn return sb.toString(); 44830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 44930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 45030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 45130d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print("mId="); writer.print(mId); 45230d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(" mArgs="); writer.println(mArgs); 45330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print("mCallbacks="); writer.println(mCallbacks); 45430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print("mLoader="); writer.println(mLoader); 455a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (mLoader != null) { 456a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn mLoader.dump(prefix + " ", fd, writer, args); 457a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn } 4586e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mHaveData || mDeliveredData) { 4596e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn writer.print(prefix); writer.print("mHaveData="); writer.print(mHaveData); 4606e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn writer.print(" mDeliveredData="); writer.println(mDeliveredData); 4616e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn writer.print(prefix); writer.print("mData="); writer.println(mData); 4626e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 46330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print("mStarted="); writer.print(mStarted); 464afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn writer.print(" mReportNextStart="); writer.print(mReportNextStart); 465f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn writer.print(" mDestroyed="); writer.println(mDestroyed); 466afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn writer.print(prefix); writer.print("mRetaining="); writer.print(mRetaining); 467afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn writer.print(" mRetainingStarted="); writer.print(mRetainingStarted); 468afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn writer.print(" mListenerRegistered="); writer.println(mListenerRegistered); 4696e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mPendingLoader != null) { 4706e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn writer.print(prefix); writer.println("Pending Loader "); 4716e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn writer.print(mPendingLoader); writer.println(":"); 4726e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mPendingLoader.dump(prefix + " ", fd, writer, args); 4736e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 47430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 475c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 476c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 477fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn LoaderManagerImpl(Activity activity, boolean started) { 478fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mActivity = activity; 479c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn mStarted = started; 480c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 481c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 482fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn void updateActivity(Activity activity) { 483fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mActivity = activity; 484fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 485fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn 4862707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn private LoaderInfo createLoader(int id, Bundle args, 4872707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderManager.LoaderCallbacks<Object> callback) { 4882707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderInfo info = new LoaderInfo(id, args, (LoaderManager.LoaderCallbacks<Object>)callback); 4892707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn Loader<Object> loader = callback.onCreateLoader(id, args); 4902707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn info.mLoader = (Loader<Object>)loader; 4916e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return info; 4926e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 4936e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 4946e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn private LoaderInfo createAndInstallLoader(int id, Bundle args, 4956e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn LoaderManager.LoaderCallbacks<Object> callback) { 4966e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn try { 4976e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mCreatingLoader = true; 4986e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn LoaderInfo info = createLoader(id, args, callback); 4996e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn installLoader(info); 5006e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return info; 5016e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } finally { 5026e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mCreatingLoader = false; 5036e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 5046e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 5056e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 5066e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn void installLoader(LoaderInfo info) { 5076e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mLoaders.put(info.mId, info); 5082707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mStarted) { 5094911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn // The activity will start all existing loaders in it's onStart(), 5104911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn // so only start them here if we're past that point of the activitiy's 5114911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn // life cycle 5124911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn info.start(); 5132707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5142707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5152707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 5166e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn /** 5176e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * Call to initialize a particular ID with a Loader. If this ID already 5186e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * has a Loader associated with it, it is left unchanged and any previous 5196e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * callbacks replaced with the newly provided ones. If there is not currently 5206e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * a Loader for the ID, a new one is created and started. 5216e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * 5226e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * <p>This function should generally be used when a component is initializing, 5236e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * to ensure that a Loader it relies on is created. This allows it to re-use 5246e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * an existing Loader's data if there already is one, so that for example 5256e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * when an {@link Activity} is re-created after a configuration change it 5266e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * does not need to re-create its loaders. 5276e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * 5286e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * <p>Note that in the case where an existing Loader is re-used, the 5296e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * <var>args</var> given here <em>will be ignored</em> because you will 5306e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * continue using the previous Loader. 5316e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * 5326e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param id A unique (to this LoaderManager instance) identifier under 5336e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * which to manage the new Loader. 5346e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param args Optional arguments that will be propagated to 5356e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * {@link LoaderCallbacks#onCreateLoader(int, Bundle) LoaderCallbacks.onCreateLoader()}. 5366e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param callback Interface implementing management of this Loader. Required. 5376e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * Its onCreateLoader() method will be called while inside of the function to 5386e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * instantiate the Loader object. 5396e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn */ 5402707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn @SuppressWarnings("unchecked") 5412707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn public <D> Loader<D> initLoader(int id, Bundle args, LoaderManager.LoaderCallbacks<D> callback) { 5426e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mCreatingLoader) { 5436e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn throw new IllegalStateException("Called while creating a loader"); 5446e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 5456e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 5462707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderInfo info = mLoaders.get(id); 5472707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 548a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "initLoader in " + this + ": args=" + args); 5495e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 5502707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (info == null) { 5512707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // Loader doesn't already exist; create. 5526e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info = createAndInstallLoader(id, args, (LoaderManager.LoaderCallbacks<Object>)callback); 553a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " Created new loader " + info); 5542707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } else { 555a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " Re-using existing loader " + info); 5562707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn info.mCallbacks = (LoaderManager.LoaderCallbacks<Object>)callback; 5572707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5582707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 5596e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (info.mHaveData && mStarted) { 5602707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // If the loader has already generated its data, report it now. 561fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn info.callOnLoadFinished(info.mLoader, info.mData); 5622707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5632707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 5642707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return (Loader<D>)info.mLoader; 5652707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5662707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 5676e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn /** 5686e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * Call to re-create the Loader associated with a particular ID. If there 5696e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * is currently a Loader associated with this ID, it will be 5706e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * canceled/stopped/destroyed as appropriate. A new Loader with the given 5716e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * arguments will be created and its data delivered to you once available. 5726e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * 5736e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * <p>This function does some throttling of Loaders. If too many Loaders 5746e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * have been created for the given ID but not yet generated their data, 5756e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * new calls to this function will create and return a new Loader but not 5766e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * actually start it until some previous loaders have completed. 5776e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * 5786e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * <p>After calling this function, any previous Loaders associated with 5796e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * this ID will be considered invalid, and you will receive no further 5806e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * data updates from them. 5816e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * 5826e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param id A unique (to this LoaderManager instance) identifier under 5836e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * which to manage the new Loader. 5846e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param args Optional arguments that will be propagated to 5856e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * {@link LoaderCallbacks#onCreateLoader(int, Bundle) LoaderCallbacks.onCreateLoader()}. 5866e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param callback Interface implementing management of this Loader. Required. 5876e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * Its onCreateLoader() method will be called while inside of the function to 5886e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * instantiate the Loader object. 5896e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn */ 590c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn @SuppressWarnings("unchecked") 5912707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn public <D> Loader<D> restartLoader(int id, Bundle args, LoaderManager.LoaderCallbacks<D> callback) { 5926e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mCreatingLoader) { 5936e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn throw new IllegalStateException("Called while creating a loader"); 5946e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 5956e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 596c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn LoaderInfo info = mLoaders.get(id); 597a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "restartLoader in " + this + ": args=" + args); 598c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn if (info != null) { 5995e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn LoaderInfo inactive = mInactiveLoaders.get(id); 6005e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (inactive != null) { 6016e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (info.mHaveData) { 6025e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // This loader now has data... we are probably being 6035e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // called from within onLoadComplete, where we haven't 6045e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // yet destroyed the last inactive loader. So just do 6055e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // that now. 606a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " Removing last inactive loader: " + info); 6076e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn inactive.mDeliveredData = false; 6085e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn inactive.destroy(); 609260c3c77d9b340164e055f87002c64d78da6e836Dianne Hackborn info.mLoader.abandon(); 6105e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn mInactiveLoaders.put(id, info); 6115e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn } else { 6125e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // We already have an inactive loader for this ID that we are 6136e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // waiting for! What to do, what to do... 6146e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (!info.mStarted) { 6156e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // The current Loader has not been started... we thus 6166e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // have no reason to keep it around, so bam, slam, 6176e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // thank-you-ma'am. 6186e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (DEBUG) Log.v(TAG, " Current loader is stopped; replacing"); 6196e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn mLoaders.put(id, null); 6206e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info.destroy(); 6216e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } else { 6226e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // Now we have three active loaders... we'll queue 6236e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // up this request to be processed once one of the other loaders 6246e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn // finishes. 6256e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (info.mPendingLoader != null) { 6266e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (DEBUG) Log.v(TAG, " Removing pending loader: " + info.mPendingLoader); 6276e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info.mPendingLoader.destroy(); 6286e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info.mPendingLoader = null; 6296e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 6306e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (DEBUG) Log.v(TAG, " Enqueuing as new pending loader"); 6316e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info.mPendingLoader = createLoader(id, args, 6326e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn (LoaderManager.LoaderCallbacks<Object>)callback); 6336e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return (Loader<D>)info.mPendingLoader.mLoader; 6346e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 6355e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn } 6362707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } else { 6372707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // Keep track of the previous instance of this loader so we can destroy 6382707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // it when the new one completes. 639a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, " Making last loader inactive: " + info); 640260c3c77d9b340164e055f87002c64d78da6e836Dianne Hackborn info.mLoader.abandon(); 6412707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mInactiveLoaders.put(id, info); 6422707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 643c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 644c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 6456e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn info = createAndInstallLoader(id, args, (LoaderManager.LoaderCallbacks<Object>)callback); 6462707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return (Loader<D>)info.mLoader; 647c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 648c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 6496e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn /** 6506e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * Rip down, tear apart, shred to pieces a current Loader ID. After returning 6516e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * from this function, any Loader objects associated with this ID are 6526e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * destroyed. Any data associated with them is destroyed. You better not 6536e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * be using it when you do this. 6546e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * @param id Identifier of the Loader to be destroyed. 6556e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn */ 656c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn public void destroyLoader(int id) { 6576e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mCreatingLoader) { 6586e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn throw new IllegalStateException("Called while creating a loader"); 6596e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 6606e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 661a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "destroyLoader in " + this + " of " + id); 6622707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn int idx = mLoaders.indexOfKey(id); 6632707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (idx >= 0) { 6642707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderInfo info = mLoaders.valueAt(idx); 6652707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.removeAt(idx); 6664911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn info.destroy(); 667c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 668f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn idx = mInactiveLoaders.indexOfKey(id); 669f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn if (idx >= 0) { 670f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn LoaderInfo info = mInactiveLoaders.valueAt(idx); 671f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn mInactiveLoaders.removeAt(idx); 672f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn info.destroy(); 673f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn } 674c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 675c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 6766e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn /** 6776e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * Return the most recent Loader object associated with the 6786e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn * given ID. 6796e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn */ 680c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn @SuppressWarnings("unchecked") 681c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn public <D> Loader<D> getLoader(int id) { 6826e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (mCreatingLoader) { 6836e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn throw new IllegalStateException("Called while creating a loader"); 6846e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 6856e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn 686c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn LoaderInfo loaderInfo = mLoaders.get(id); 687c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn if (loaderInfo != null) { 6886e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn if (loaderInfo.mPendingLoader != null) { 6896e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return (Loader<D>)loaderInfo.mPendingLoader.mLoader; 6906e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn } 6916e1bf6a3054674281bafd270165c99cb2423666dDianne Hackborn return (Loader<D>)loaderInfo.mLoader; 692c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 693c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn return null; 694c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 695c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 696c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn void doStart() { 697a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "Starting in " + this); 698fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (mStarted) { 699fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn RuntimeException e = new RuntimeException("here"); 700fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn e.fillInStackTrace(); 701fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn Log.w(TAG, "Called doStart when already started: " + this, e); 702fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn return; 703fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 704fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn 705c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mStarted = true; 706c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn 707c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn // Call out to sub classes so they can start their loaders 708c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn // Let the existing loaders know that we want to be notified when a load is complete 709c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 7102707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.valueAt(i).start(); 711c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 712c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 713c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 714c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn void doStop() { 715a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "Stopping in " + this); 716fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (!mStarted) { 717fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn RuntimeException e = new RuntimeException("here"); 718fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn e.fillInStackTrace(); 719fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn Log.w(TAG, "Called doStop when not started: " + this, e); 720fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn return; 721fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 7225e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 723c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 7242707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.valueAt(i).stop(); 725c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 726c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn mStarted = false; 727c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 728c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 7292707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void doRetain() { 730a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "Retaining in " + this); 731fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (!mStarted) { 732fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn RuntimeException e = new RuntimeException("here"); 733fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn e.fillInStackTrace(); 734fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn Log.w(TAG, "Called doRetain when not started: " + this, e); 735fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn return; 736fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 7375e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 7382707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mRetaining = true; 7392707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mStarted = false; 7402707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 7412707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.valueAt(i).retain(); 7422707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 7432707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 7442707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 7452707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void finishRetain() { 746a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (mRetaining) { 747a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "Finished Retaining in " + this); 7485e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 749a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn mRetaining = false; 750a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 751a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn mLoaders.valueAt(i).finishRetain(); 752a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn } 7532707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 7542707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 7552707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 756afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn void doReportNextStart() { 757afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 758afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn mLoaders.valueAt(i).mReportNextStart = true; 759afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 760afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 761afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn 762afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn void doReportStart() { 763afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 764afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn mLoaders.valueAt(i).reportStart(); 765afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 766afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn } 767afc4b283fdaedec9bf32492a019b43cc33edc9b6Dianne Hackborn 768c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn void doDestroy() { 7692707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (!mRetaining) { 770a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "Destroying Active in " + this); 771c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 7722707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.valueAt(i).destroy(); 773c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 774c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 7752707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 776a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn if (DEBUG) Log.v(TAG, "Destroying Inactive in " + this); 7772707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn for (int i = mInactiveLoaders.size()-1; i >= 0; i--) { 7782707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mInactiveLoaders.valueAt(i).destroy(); 7792707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 7802707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mInactiveLoaders.clear(); 781c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 78230d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 78330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn @Override 784a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn public String toString() { 785a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn StringBuilder sb = new StringBuilder(128); 786a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn sb.append("LoaderManager{"); 787a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn sb.append(Integer.toHexString(System.identityHashCode(this))); 788a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn sb.append(" in "); 789a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn DebugUtils.buildShortClassTag(mActivity, sb); 790a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn sb.append("}}"); 791a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn return sb.toString(); 792a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn } 793a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn 794a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn @Override 79530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 79630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn if (mLoaders.size() > 0) { 79730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.println("Active Loaders:"); 79830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn String innerPrefix = prefix + " "; 79930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn for (int i=0; i < mLoaders.size(); i++) { 80030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn LoaderInfo li = mLoaders.valueAt(i); 80130d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print(" #"); writer.print(mLoaders.keyAt(i)); 802a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn writer.print(": "); writer.println(li.toString()); 80330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn li.dump(innerPrefix, fd, writer, args); 80430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 80530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 80630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn if (mInactiveLoaders.size() > 0) { 80730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.println("Inactive Loaders:"); 80830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn String innerPrefix = prefix + " "; 80930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn for (int i=0; i < mInactiveLoaders.size(); i++) { 81030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn LoaderInfo li = mInactiveLoaders.valueAt(i); 81130d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print(" #"); writer.print(mInactiveLoaders.keyAt(i)); 812a2ea747faaf5fcd437afbaaf4085cfc29e7c16b8Dianne Hackborn writer.print(": "); writer.println(li.toString()); 81330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn li.dump(innerPrefix, fd, writer, args); 81430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 81530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 81630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 817c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn} 818