LoaderManager.java revision f73c75ca20fcaaee1b0eeaaf756252c33e3099c6
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; 215e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackbornimport android.util.Log; 22c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackbornimport android.util.SparseArray; 23c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 2430d7189067524000c738c188c4ff91f84f474d25Dianne Hackbornimport java.io.FileDescriptor; 2530d7189067524000c738c188c4ff91f84f474d25Dianne Hackbornimport java.io.PrintWriter; 2630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 27c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn/** 284911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * Interface associated with an {@link Activity} or {@link Fragment} for managing 29c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * one or more {@link android.content.Loader} instances associated with it. This 30c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * helps an application manage longer-running operations in conjunction with the 31c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Activity or Fragment lifecycle; the most common use of this is with a 32c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * {@link android.content.CursorLoader}, however applications are free to write 33c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * their own loaders for loading other types of data. 34c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 35c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <p>As an example, here is the full implementation of a {@link Fragment} 36c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * that displays a {@link android.widget.ListView} containing the results of 37c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * a query against the contacts content provider. It uses a 38c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * {@link android.content.CursorLoader} to manage the query on the provider. 39c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 40c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * {@sample development/samples/ApiDemos/src/com/example/android/apis/app/FragmentListCursorLoader.java 41c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * fragment_cursor} 42c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn */ 43ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackbornpublic abstract class LoaderManager { 44c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn /** 45c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn * Callback interface for a client to interact with the manager. 46c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn */ 47c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn public interface LoaderCallbacks<D> { 484911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 494911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * Instantiate and return a new Loader for the given ID. 504911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * 514911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @param id The ID whose loader is to be created. 524911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @param args Any arguments supplied by the caller. 534911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @return Return a new Loader instance that is ready to start loading. 544911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 55c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn public Loader<D> onCreateLoader(int id, Bundle args); 564911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 574911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 58fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * Called when a previously created loader has finished its load. Note 59fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * that normally an application is <em>not</em> allowed to commit fragment 60fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * transactions while in this call, since it can happen after an 61fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * activity's state is saved. See {@link FragmentManager#openTransaction() 62fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * FragmentManager.openTransaction()} for further discussion on this. 63fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn * 64c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <p>This function is guaranteed to be called prior to the release of 65c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * the last data that was supplied for this Loader. At this point 66c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * you should remove all use of the old data (since it will be released 67c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * soon), but should not do your own release of the data since its Loader 68c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * owns it and will take care of that. The Loader will take care of 69c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * management of its data so you don't have to. In particular: 70c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 71c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <ul> 72c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <li> <p>The Loader will monitor for changes to the data, and report 73c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * them to you through new calls here. You should not monitor the 74c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * data yourself. For example, if the data is a {@link android.database.Cursor} 75c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * and you place it in a {@link android.widget.CursorAdapter}, use 76c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * the {@link android.widget.CursorAdapter#CursorAdapter(android.content.Context, 77c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * android.database.Cursor, int)} constructor <em>without</em> passing 78c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * in either {@link android.widget.CursorAdapter#FLAG_AUTO_REQUERY} 79c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * or {@link android.widget.CursorAdapter#FLAG_REGISTER_CONTENT_OBSERVER} 80c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * (that is, use 0 for the flags argument). This prevents the CursorAdapter 81c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * from doing its own observing of the Cursor, which is not needed since 82c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * when a change happens you will get a new Cursor throw another call 83c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * here. 84c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * <li> The Loader will release the data once it knows the application 85c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * is no longer using it. For example, if the data is 86c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * a {@link android.database.Cursor} from a {@link android.content.CursorLoader}, 87c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * you should not call close() on it yourself. If the Cursor is being placed in a 88c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * {@link android.widget.CursorAdapter}, you should use the 89c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * {@link android.widget.CursorAdapter#swapCursor(android.database.Cursor)} 90c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * method so that the old Cursor is not closed. 91c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * </ul> 92c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 934911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @param loader The Loader that has finished. 944911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * @param data The data generated by the Loader. 954911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 96c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn public void onLoadFinished(Loader<D> loader, D data); 97c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn 98c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn /** 99c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Called when a previously created loader is being reset, and thus 100c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * making its data unavailable. The application should at this point 101c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * remove any references it has to the Loader's data. 102c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 103c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param loader The Loader that is being reset. 104c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn */ 105c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn public void onLoaderReset(Loader<D> loader); 106c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 107c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 1084911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 1094911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * Ensures a loader is initialized and active. If the loader doesn't 1104911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * already exist, one is created and (if the activity/fragment is currently 1114911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * started) starts the loader. Otherwise the last created 1124911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * loader is re-used. 1134911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * 1144911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * <p>In either case, the given callback is associated with the loader, and 1154911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * will be called as the loader state changes. If at the point of call 1164911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * the caller is in its started state, and the requested loader 1174911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * already exists and has generated its data, then 118c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * callback {@link LoaderCallbacks#onLoadFinished} will 1194911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * be called immediately (inside of this function), so you must be prepared 1204911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * for this to happen. 121c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 122c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param id A unique identifier for this loader. Can be whatever you want. 123c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Identifiers are scoped to a particular LoaderManager instance. 124c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param args Optional arguments to supply to the loader at construction. 125c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param callback Interface the LoaderManager will call to report about 126c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * changes in the state of the loader. Required. 1274911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 128ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackborn public abstract <D> Loader<D> initLoader(int id, Bundle args, 1294911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn LoaderManager.LoaderCallbacks<D> callback); 1304911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 1314911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 132c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Starts a new or restarts an existing {@link android.content.Loader} in 133c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * this manager, registers the callbacks to it, 1344911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * and (if the activity/fragment is currently started) starts loading it. 1354911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * If a loader with the same id has previously been 1364911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * started it will automatically be destroyed when the new loader completes 1374911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * its work. The callback will be delivered before the old loader 1384911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * is destroyed. 139c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * 140c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param id A unique identifier for this loader. Can be whatever you want. 141c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * Identifiers are scoped to a particular LoaderManager instance. 142c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param args Optional arguments to supply to the loader at construction. 143c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @param callback Interface the LoaderManager will call to report about 144c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * changes in the state of the loader. Required. 1454911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 146ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackborn public abstract <D> Loader<D> restartLoader(int id, Bundle args, 1474911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn LoaderManager.LoaderCallbacks<D> callback); 1484911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 1494911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 150f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn * Stops and removes the loader with the given ID. If this loader 151f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn * had previously reported data to the client through 152f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn * {@link LoaderCallbacks#onLoadFinished(Loader, Object)}, a call 153f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn * will be made to {@link LoaderCallbacks#onLoaderReset(Loader)}. 1544911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 155c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn public abstract void destroyLoader(int id); 156c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn 157c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn /** 158c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn * @deprecated Renamed to {@link #destroyLoader}. 159c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn */ 160c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn @Deprecated 161c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn public void stopLoader(int id) { 162c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn destroyLoader(id); 163c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 1644911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 1654911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn /** 1664911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * Return the Loader with the given id or null if no matching Loader 1674911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn * is found. 1684911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn */ 169ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackborn public abstract <D> Loader<D> getLoader(int id); 17030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 17130d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn /** 17230d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * Print the LoaderManager's state into the given stream. 17330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * 17430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * @param prefix Text to print at the front of each line. 17530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * @param fd The raw file descriptor that the dump is being sent to. 17630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * @param writer A PrintWriter to which the dump is to be set. 17730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn * @param args Additional arguments to the dump request. 17830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn */ 17930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); 1804911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn} 1814911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 182ab36acb39941ce981dddda9f9cf4d2d23a56fd26Dianne Hackbornclass LoaderManagerImpl extends LoaderManager { 1835e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn static final String TAG = "LoaderManagerImpl"; 1845e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn static final boolean DEBUG = true; 1855e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 1865e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // These are the currently active loaders. A loader is here 1875e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // from the time its load is started until it has been explicitly 1885e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // stopped or restarted by the application. 1894911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn final SparseArray<LoaderInfo> mLoaders = new SparseArray<LoaderInfo>(); 1905e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 1915e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // These are previously run loaders. This list is maintained internally 1925e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // to avoid destroying a loader while an application is still using it. 1935e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // It allows an application to restart a loader, but continue using its 1945e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // previously run loader until the new loader's data is available. 1954911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn final SparseArray<LoaderInfo> mInactiveLoaders = new SparseArray<LoaderInfo>(); 1965e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 197fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn Activity mActivity; 1984911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn boolean mStarted; 1994911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn boolean mRetaining; 2004911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn boolean mRetainingStarted; 2014911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 202c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn final class LoaderInfo implements Loader.OnLoadCompleteListener<Object> { 2032707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn final int mId; 2042707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn final Bundle mArgs; 2052707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderManager.LoaderCallbacks<Object> mCallbacks; 2062707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn Loader<Object> mLoader; 2072707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn Object mData; 2082707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mStarted; 209540d3d26623f44caaa82a5c973cda818cb11f946Dianne Hackborn boolean mNeedReset; 2102707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mRetaining; 2112707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mRetainingStarted; 2122707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mDestroyed; 2132707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn boolean mListenerRegistered; 21430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 2152707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn public LoaderInfo(int id, Bundle args, LoaderManager.LoaderCallbacks<Object> callbacks) { 2162707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mId = id; 2172707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mArgs = args; 2182707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mCallbacks = callbacks; 2192707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2202707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2212707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void start() { 2222707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mRetaining && mRetainingStarted) { 2232707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // Our owner is started, but we were being retained from a 2242707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // previous instance in the started state... so there is really 2252707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // nothing to do here, since the loaders are still started. 2262707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mStarted = true; 2272707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return; 2282707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2292707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2304911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn if (mStarted) { 2314911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn // If loader already started, don't restart. 2324911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn return; 2334911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn } 2344911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn 2355e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Starting: " + this); 2362707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mLoader == null && mCallbacks != null) { 2372707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoader = mCallbacks.onCreateLoader(mId, mArgs); 2382707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2392707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mLoader != null) { 2404911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn if (!mListenerRegistered) { 2414911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn mLoader.registerListener(mId, this); 2424911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn mListenerRegistered = true; 2434911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn } 2442707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoader.startLoading(); 2452707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mStarted = true; 2462707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2472707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2482707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2492707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void retain() { 2505e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Retaining: " + this); 2512707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mRetaining = true; 2522707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mRetainingStarted = mStarted; 2532707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mStarted = false; 2542707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mCallbacks = null; 2552707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2562707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2572707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void finishRetain() { 2582707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mRetaining) { 2595e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Finished Retaining: " + this); 2602707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mRetaining = false; 2612707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mStarted != mRetainingStarted) { 2622707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (!mStarted) { 2632707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // This loader was retained in a started state, but 2642707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // at the end of retaining everything our owner is 2652707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // no longer started... so make it stop. 2662707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn stop(); 2672707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2682707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 269c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 270c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn 271c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn if (mStarted && mData != null) { 272c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // This loader has retained its data, either completely across 273c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // a configuration change or just whatever the last data set 274c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // was after being restarted from a stop, and now at the point of 275c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // finishing the retain we find we remain started, have 276c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // our data, and the owner has a new callback... so 277c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn // let's deliver the data now. 278c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn callOnLoadFinished(mLoader, mData); 2792707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2802707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2812707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2822707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void stop() { 2835e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Stopping: " + this); 2842707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mStarted = false; 285debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn if (!mRetaining) { 286debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn if (mLoader != null && mListenerRegistered) { 287debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn // Let the loader know we're done with it 288debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn mListenerRegistered = false; 289debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn mLoader.unregisterListener(this); 290debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn mLoader.stopLoading(); 291debb2e25b3ce2f0f5195a2895dd1882fc172d4d8Dianne Hackborn } 2922707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2932707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 2942707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 2952707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void destroy() { 2965e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Destroying: " + this); 2972707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mDestroyed = true; 298540d3d26623f44caaa82a5c973cda818cb11f946Dianne Hackborn if (mCallbacks != null && mLoader != null && mData != null && mNeedReset) { 299c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn String lastBecause = null; 300c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn if (mActivity != null) { 301c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn lastBecause = mActivity.mFragments.mNoTransactionsBecause; 302c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mActivity.mFragments.mNoTransactionsBecause = "onLoaderReset"; 303c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 304c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn try { 305c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mCallbacks.onLoaderReset(mLoader); 306c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } finally { 307c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn if (mActivity != null) { 308c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mActivity.mFragments.mNoTransactionsBecause = lastBecause; 309c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 310c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 311c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 312540d3d26623f44caaa82a5c973cda818cb11f946Dianne Hackborn mNeedReset = false; 3132707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mCallbacks = null; 314c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mData = null; 3152707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mLoader != null) { 3162707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mListenerRegistered) { 3172707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mListenerRegistered = false; 3182707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoader.unregisterListener(this); 3192707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 320c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mLoader.reset(); 3212707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3222707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 323c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 324c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn @Override public void onLoadComplete(Loader<Object> loader, Object data) { 3255e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, "onLoadComplete: " + this + " mDestroyed=" + mDestroyed); 3265e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 3272707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mDestroyed) { 3282707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return; 3292707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 3302707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 331c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn // Notify of the new data so the app can switch out the old data before 332c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn // we try to destroy it. 3332707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mData = data; 334c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn if (mStarted) { 335c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn callOnLoadFinished(loader, data); 336c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn } 337c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 3385e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, "onLoadFinished returned: " + this); 3395e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 3405e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // We have now given the application the new loader with its 3415e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // loaded data, so it should have stopped using the previous 3425e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // loader. If there is a previous loader on the inactive list, 3435e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // clean it up. 3442707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderInfo info = mInactiveLoaders.get(mId); 3455e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (info != null && info != this) { 346540d3d26623f44caaa82a5c973cda818cb11f946Dianne Hackborn info.mNeedReset = false; 3475e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn info.destroy(); 3482707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mInactiveLoaders.remove(mId); 349c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 350c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 3515e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 352fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn void callOnLoadFinished(Loader<Object> loader, Object data) { 353fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (mCallbacks != null) { 354fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn String lastBecause = null; 355fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (mActivity != null) { 356fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn lastBecause = mActivity.mFragments.mNoTransactionsBecause; 357fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mActivity.mFragments.mNoTransactionsBecause = "onLoadFinished"; 358fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 359fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn try { 360fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mCallbacks.onLoadFinished(loader, data); 361fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } finally { 362fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (mActivity != null) { 363fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mActivity.mFragments.mNoTransactionsBecause = lastBecause; 364fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 365fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 366540d3d26623f44caaa82a5c973cda818cb11f946Dianne Hackborn mNeedReset = true; 367fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 368fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 369fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn 3705e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn @Override 3715e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn public String toString() { 3725e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn StringBuilder sb = new StringBuilder(64); 3735e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append("LoaderInfo{"); 3745e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append(Integer.toHexString(System.identityHashCode(this))); 3755e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append(" #"); 3765e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append(mId); 3775e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (mArgs != null) { 3785e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append(" "); 3795e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append(mArgs.toString()); 3805e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn } 3815e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn sb.append("}"); 3825e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn return sb.toString(); 3835e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn } 38430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 38530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn public String toBasicString() { 38630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn StringBuilder sb = new StringBuilder(64); 38730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn sb.append("LoaderInfo{"); 38830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn sb.append(Integer.toHexString(System.identityHashCode(this))); 38930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn sb.append(" #"); 39030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn sb.append(mId); 39130d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn sb.append("}"); 39230d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn return sb.toString(); 39330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 39430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 39530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 39630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print("mId="); writer.print(mId); 39730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(" mArgs="); writer.println(mArgs); 39830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print("mCallbacks="); writer.println(mCallbacks); 39930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print("mLoader="); writer.println(mLoader); 40030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print("mData="); writer.println(mData); 40130d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print("mStarted="); writer.print(mStarted); 40230d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(" mRetaining="); writer.print(mRetaining); 403f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn writer.print(" mDestroyed="); writer.println(mDestroyed); 404f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn writer.print(prefix); writer.print("mNeedReset="); writer.print(mNeedReset); 40530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(" mListenerRegistered="); writer.println(mListenerRegistered); 40630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 407c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 408c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 409fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn LoaderManagerImpl(Activity activity, boolean started) { 410fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mActivity = activity; 411c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn mStarted = started; 412c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 413c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 414fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn void updateActivity(Activity activity) { 415fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn mActivity = activity; 416fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 417fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn 4182707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn private LoaderInfo createLoader(int id, Bundle args, 4192707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderManager.LoaderCallbacks<Object> callback) { 4202707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderInfo info = new LoaderInfo(id, args, (LoaderManager.LoaderCallbacks<Object>)callback); 4212707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.put(id, info); 4222707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn Loader<Object> loader = callback.onCreateLoader(id, args); 4232707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn info.mLoader = (Loader<Object>)loader; 4242707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (mStarted) { 4254911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn // The activity will start all existing loaders in it's onStart(), 4264911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn // so only start them here if we're past that point of the activitiy's 4274911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn // life cycle 4284911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn info.start(); 4292707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 4302707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return info; 4312707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 4322707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 4332707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn @SuppressWarnings("unchecked") 4342707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn public <D> Loader<D> initLoader(int id, Bundle args, LoaderManager.LoaderCallbacks<D> callback) { 4352707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderInfo info = mLoaders.get(id); 4362707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 4375e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, "initLoader in " + this + ": cur=" + info); 4385e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 4392707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (info == null) { 4402707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // Loader doesn't already exist; create. 4412707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn info = createLoader(id, args, (LoaderManager.LoaderCallbacks<Object>)callback); 4422707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } else { 4432707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn info.mCallbacks = (LoaderManager.LoaderCallbacks<Object>)callback; 4442707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 4452707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 4462707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (info.mData != null && mStarted) { 4472707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // If the loader has already generated its data, report it now. 448fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn info.callOnLoadFinished(info.mLoader, info.mData); 4492707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 4502707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 4512707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return (Loader<D>)info.mLoader; 4522707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 4532707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 454c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn @SuppressWarnings("unchecked") 4552707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn public <D> Loader<D> restartLoader(int id, Bundle args, LoaderManager.LoaderCallbacks<D> callback) { 456c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn LoaderInfo info = mLoaders.get(id); 4575e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, "restartLoader in " + this + ": cur=" + info); 458c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn if (info != null) { 4595e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn LoaderInfo inactive = mInactiveLoaders.get(id); 4605e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (inactive != null) { 4615e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (info.mData != null) { 4625e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // This loader now has data... we are probably being 4635e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // called from within onLoadComplete, where we haven't 4645e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // yet destroyed the last inactive loader. So just do 4655e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // that now. 4665e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Removing last inactive loader in " + this); 467540d3d26623f44caaa82a5c973cda818cb11f946Dianne Hackborn inactive.mNeedReset = false; 4685e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn inactive.destroy(); 4695e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn mInactiveLoaders.put(id, info); 4705e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn } else { 4715e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // We already have an inactive loader for this ID that we are 4725e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // waiting for! Now we have three active loaders... let's just 4735e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // drop the one in the middle, since we are still waiting for 4745e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn // its result but that result is already out of date. 4755e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Removing intermediate loader in " + this); 4765e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn info.destroy(); 4775e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn } 4782707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } else { 4792707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // Keep track of the previous instance of this loader so we can destroy 4802707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn // it when the new one completes. 4815e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, " Making inactive: " + info); 4822707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mInactiveLoaders.put(id, info); 4832707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 484c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 485c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 4862707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn info = createLoader(id, args, (LoaderManager.LoaderCallbacks<Object>)callback); 4872707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return (Loader<D>)info.mLoader; 488c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 489c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 490c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn public void destroyLoader(int id) { 4915e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, "stopLoader in " + this + " of " + id); 4922707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn int idx = mLoaders.indexOfKey(id); 4932707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (idx >= 0) { 4942707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn LoaderInfo info = mLoaders.valueAt(idx); 4952707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.removeAt(idx); 4964911b783aa9f4af5ac919db861751d350471f5efDianne Hackborn info.destroy(); 497c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 498f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn idx = mInactiveLoaders.indexOfKey(id); 499f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn if (idx >= 0) { 500f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn LoaderInfo info = mInactiveLoaders.valueAt(idx); 501f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn mInactiveLoaders.removeAt(idx); 502f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn info.destroy(); 503f73c75ca20fcaaee1b0eeaaf756252c33e3099c6Dianne Hackborn } 504c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 505c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 506c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn @SuppressWarnings("unchecked") 507c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn public <D> Loader<D> getLoader(int id) { 508c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn LoaderInfo loaderInfo = mLoaders.get(id); 509c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn if (loaderInfo != null) { 5102707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn return (Loader<D>)mLoaders.get(id).mLoader; 511c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 512c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn return null; 513c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 514c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 515c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn void doStart() { 5165e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, "Starting: " + this); 517fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (mStarted) { 518fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn RuntimeException e = new RuntimeException("here"); 519fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn e.fillInStackTrace(); 520fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn Log.w(TAG, "Called doStart when already started: " + this, e); 521fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn return; 522fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 523fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn 524c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn mStarted = true; 525c91893511dc1b9e634648406c9ae61b15476e65dDianne Hackborn 526c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn // Call out to sub classes so they can start their loaders 527c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn // Let the existing loaders know that we want to be notified when a load is complete 528c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 5292707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.valueAt(i).start(); 530c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 531c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 532c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 533c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn void doStop() { 5345e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, "Stopping: " + this); 535fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (!mStarted) { 536fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn RuntimeException e = new RuntimeException("here"); 537fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn e.fillInStackTrace(); 538fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn Log.w(TAG, "Called doStop when not started: " + this, e); 539fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn return; 540fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 5415e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 542c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 5432707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.valueAt(i).stop(); 544c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 545c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn mStarted = false; 546c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 547c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn 5482707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void doRetain() { 5495e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, "Retaining: " + this); 550fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn if (!mStarted) { 551fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn RuntimeException e = new RuntimeException("here"); 552fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn e.fillInStackTrace(); 553fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn Log.w(TAG, "Called doRetain when not started: " + this, e); 554fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn return; 555fb3cffeb35368da22f99b85d45039c4e6e471c06Dianne Hackborn } 5565e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 5572707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mRetaining = true; 5582707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mStarted = false; 5592707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 5602707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.valueAt(i).retain(); 5612707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5622707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5632707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 5642707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn void finishRetain() { 5655e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, "Finished Retaining: " + this); 5665e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn 5672707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mRetaining = false; 5682707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 5692707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.valueAt(i).finishRetain(); 5702707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5712707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5722707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 573c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn void doDestroy() { 5742707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn if (!mRetaining) { 5755e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, "Destroying Active: " + this); 576c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn for (int i = mLoaders.size()-1; i >= 0; i--) { 5772707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mLoaders.valueAt(i).destroy(); 578c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 579c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 5802707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn 5815e0d59547c4042037e23a42ba4e2521721e9c7d3Dianne Hackborn if (DEBUG) Log.v(TAG, "Destroying Inactive: " + this); 5822707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn for (int i = mInactiveLoaders.size()-1; i >= 0; i--) { 5832707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mInactiveLoaders.valueAt(i).destroy(); 5842707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn } 5852707d6026240bcca6f0e35e2e1138958882e90ceDianne Hackborn mInactiveLoaders.clear(); 586c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn } 58730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn 58830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn @Override 58930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 59030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn if (mLoaders.size() > 0) { 59130d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.println("Active Loaders:"); 59230d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn String innerPrefix = prefix + " "; 59330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn for (int i=0; i < mLoaders.size(); i++) { 59430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn LoaderInfo li = mLoaders.valueAt(i); 59530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print(" #"); writer.print(mLoaders.keyAt(i)); 59630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(": "); writer.println(li.toBasicString()); 59730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn li.dump(innerPrefix, fd, writer, args); 59830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 59930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 60030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn if (mInactiveLoaders.size() > 0) { 60130d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.println("Inactive Loaders:"); 60230d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn String innerPrefix = prefix + " "; 60330d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn for (int i=0; i < mInactiveLoaders.size(); i++) { 60430d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn LoaderInfo li = mInactiveLoaders.valueAt(i); 60530d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(prefix); writer.print(" #"); writer.print(mInactiveLoaders.keyAt(i)); 60630d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn writer.print(": "); writer.println(li.toBasicString()); 60730d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn li.dump(innerPrefix, fd, writer, args); 60830d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 60930d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 61030d7189067524000c738c188c4ff91f84f474d25Dianne Hackborn } 611c801768e4d29667a2608695449ebc2833ba0f200Dianne Hackborn} 612