am ad064d48: Merge "Recents backup helper" into lmp-mr1-dev (b2b8dcba) · Commits · e / os / android_frameworks_base

core/java/android/app/backup/RecentsBackupHelper.java

0 → 100644

+114 −0

Original line number	Diff line number	Diff line
		package android.app.backup;

		import android.content.Context;
		import android.os.Environment;
		import android.os.ParcelFileDescriptor;
		import android.util.Slog;

		import java.io.File;

		/**
		* Helper for saving/restoring 'recent tasks' infrastructure.
		* @hide
		*/
		public class RecentsBackupHelper implements BackupHelper {
		private static final String TAG = "RecentsBackup";
		private static final boolean DEBUG = false;

		// This must match TaskPersister.TASKS_DIRNAME, but that class is not accessible from here
		private static final String RECENTS_TASK_DIR = "recent_tasks";

		// Must match TaskPersister.IMAGES_DIRNAME, as above
		private static final String RECENTS_IMAGE_DIR = "recent_images";

		// At restore time, tasks/thumbnails are placed in these directories alongside
		// the "live" recents dirs named above.
		private static final String RECENTS_TASK_RESTORE_DIR = "restored_" + RECENTS_TASK_DIR;
		private static final String RECENTS_IMAGE_RESTORE_DIR = "restored_" + RECENTS_IMAGE_DIR;

		// Prefixes for tagging the two kinds of recents backup records that we might generate
		private static final String RECENTS_TASK_KEY = "task:";
		private static final String RECENTS_IMAGE_KEY = "image:";

		FileBackupHelperBase mTaskFileHelper;

		final File mSystemDir;
		final File mTasksDir;
		final File mRestoredTasksDir;
		final File mRestoredImagesDir;
		final String[] mRecentFiles;
		final String[] mRecentKeys;

		/**
		* @param context The agent context in which this helper instance will run
		*/
		public RecentsBackupHelper(Context context) {
		mTaskFileHelper = new FileBackupHelperBase(context);

		mSystemDir = new File(Environment.getDataDirectory(), "system");
		mTasksDir = new File(mSystemDir, RECENTS_TASK_DIR);
		mRestoredTasksDir = new File(mSystemDir, RECENTS_TASK_RESTORE_DIR);
		mRestoredImagesDir = new File(mSystemDir, RECENTS_IMAGE_RESTORE_DIR);

		// Currently we back up only the recent-task descriptions, not the thumbnails
		File[] recentFiles = mTasksDir.listFiles();
		if (recentFiles != null) {
		// We explicitly proceed even if this is a zero-size array
		final int N = recentFiles.length;
		mRecentKeys = new String[N];
		mRecentFiles = new String[N];
		if (DEBUG) {
		Slog.i(TAG, "Identifying recents for backup: " + N);
		}
		for (int i = 0; i < N; i++) {
		mRecentKeys[i] = new String(RECENTS_TASK_KEY + recentFiles[i].getName());
		mRecentFiles[i] = recentFiles[i].getAbsolutePath();
		if (DEBUG) {
		Slog.i(TAG, " " + mRecentKeys[i]);
		}
		}
		} else {
		mRecentFiles = mRecentKeys = new String[0];
		}
		}

		/**
		* Task-file key: RECENTS_TASK_KEY + leaf filename
		* Thumbnail-file key: RECENTS_IMAGE_KEY + leaf filename
		*/
		@Override
		public void performBackup(ParcelFileDescriptor oldState, BackupDataOutput data,
		ParcelFileDescriptor newState) {
		FileBackupHelperBase.performBackup_checked(oldState, data, newState,
		mRecentFiles, mRecentKeys);
		}

		@Override
		public void restoreEntity(BackupDataInputStream data) {
		final String key = data.getKey();
		File output = null;
		if (key.startsWith(RECENTS_TASK_KEY)) {
		String name = key.substring(RECENTS_TASK_KEY.length());
		output = new File(mRestoredTasksDir, name);
		mRestoredTasksDir.mkdirs();
		} else if (key.startsWith(RECENTS_IMAGE_KEY)) {
		String name = key.substring(RECENTS_IMAGE_KEY.length());
		output = new File(mRestoredImagesDir, name);
		mRestoredImagesDir.mkdirs();
		}

		if (output != null) {
		if (DEBUG) {
		Slog.i(TAG, "Restoring key='"
		+ key + "' to " + output.getAbsolutePath());
		}
		mTaskFileHelper.writeFile(output, data);
		}
		}

		@Override
		public void writeNewStateDescription(ParcelFileDescriptor newState) {
		mTaskFileHelper.writeNewStateDescription(newState);
		}

		}

core/java/com/android/server/backup/SystemBackupAgent.java

+4 −0

Original line number	Diff line number	Diff line
		@@ -23,6 +23,7 @@ import android.app.backup.BackupDataOutput;
		import android.app.backup.BackupAgentHelper;
		import android.app.backup.FullBackup;
		import android.app.backup.FullBackupDataOutput;
		import android.app.backup.RecentsBackupHelper;
		import android.app.backup.WallpaperBackupHelper;
		import android.content.Context;
		import android.os.Environment;
		@@ -83,6 +84,8 @@ public class SystemBackupAgent extends BackupAgentHelper {
		}
		}
		addHelper("wallpaper", new WallpaperBackupHelper(SystemBackupAgent.this, files, keys));
		addHelper("recents", new RecentsBackupHelper(SystemBackupAgent.this));

		super.onBackup(oldState, data, newState);
		}

		@@ -113,6 +116,7 @@ public class SystemBackupAgent extends BackupAgentHelper {
		addHelper("system_files", new WallpaperBackupHelper(SystemBackupAgent.this,
		new String[] { WALLPAPER_IMAGE },
		new String[] { WALLPAPER_IMAGE_KEY} ));
		addHelper("recents", new RecentsBackupHelper(SystemBackupAgent.this));

		try {
		super.onRestore(data, appVersionCode, newState);

services/core/java/com/android/server/am/TaskPersister.java

+6 −0

Original line number	Diff line number	Diff line
		@@ -63,6 +63,12 @@ public class TaskPersister {
		private static final String IMAGES_DIRNAME = "recent_images";
		static final String IMAGE_EXTENSION = ".png";

		// Directory where restored historical task XML/PNG files are placed. This directory
		// contains subdirs named after TASKS_DIRNAME and IMAGES_DIRNAME mirroring the
		// ancestral device's dataset. This needs to match the RECENTS_TASK_RESTORE_DIR
		// value in RecentsBackupHelper.
		private static final String RESTORED_TASKS = "restored_" + TASKS_DIRNAME;

		private static final String TAG_TASK = "task";

		static File sImagesDir;