SharedStorageAgentpublic class SharedStorageAgent extends android.app.backup.FullBackupAgent
| Fields Summary |
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| static final String | TAG | | static final boolean | DEBUG | | android.os.storage.StorageVolume[] | mVolumes |
| Methods Summary |
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| public void | onCreate()
StorageManager mgr = (StorageManager) getSystemService(Context.STORAGE_SERVICE);
if (mgr != null) {
mVolumes = mgr.getVolumeList();
} else {
Slog.e(TAG, "Unable to access Storage Manager");
}
| | public void | onFullBackup(android.app.backup.FullBackupDataOutput output)Full backup of the shared-storage filesystem
// If there are shared-storage volumes available, run the inherited directory-
// hierarchy backup process on them. By convention in the Storage Manager, the
// "primary" shared storage volume is first in the list.
if (mVolumes != null) {
if (DEBUG) Slog.i(TAG, "Backing up " + mVolumes.length + " shared volumes");
// Ignore all apps' getExternalFilesDir() content; it is backed up as part of
// each app-specific payload.
HashSet<String> externalFilesDirFilter = new HashSet<String>();
final File externalAndroidRoot = new File(Environment.getExternalStorageDirectory(),
Environment.DIRECTORY_ANDROID);
externalFilesDirFilter.add(externalAndroidRoot.getCanonicalPath());
for (int i = 0; i < mVolumes.length; i++) {
StorageVolume v = mVolumes[i];
// Express the contents of volume N this way in the tar stream:
// shared/N/path/to/file
// The restore will then extract to the given volume
String domain = FullBackup.SHARED_PREFIX + i;
fullBackupFileTree(null, domain, v.getPath(), externalFilesDirFilter, output);
}
}
| | public void | onRestoreFile(android.os.ParcelFileDescriptor data, long size, int type, java.lang.String domain, java.lang.String relpath, long mode, long mtime)Full restore of one file to shared storage
if (DEBUG) Slog.d(TAG, "Shared restore: [ " + domain + " : " + relpath + "]");
File outFile = null;
// The file path must be in the semantic form [number]/path/to/file...
int slash = relpath.indexOf('/");
if (slash > 0) {
try {
int i = Integer.parseInt(relpath.substring(0, slash));
if (i <= mVolumes.length) {
outFile = new File(mVolumes[i].getPath(), relpath.substring(slash + 1));
if (DEBUG) Slog.i(TAG, " => " + outFile.getAbsolutePath());
} else {
Slog.w(TAG, "Cannot restore data for unavailable volume " + i);
}
} catch (NumberFormatException e) {
if (DEBUG) Slog.w(TAG, "Bad volume number token: " + relpath.substring(0, slash));
}
} else {
if (DEBUG) Slog.i(TAG, "Can't find volume-number token");
}
if (outFile == null) {
Slog.e(TAG, "Skipping data with malformed path " + relpath);
}
FullBackup.restoreFile(data, size, type, -1, mtime, outFile);
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