Track install/removal/update of packages that provide backup services (3799bc24) · Commits · e / os / android_frameworks_base

core/java/android/backup/BackupService.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -33,7 +33,7 @@ import android.util.Log;
		* In order to use the backup service, your application must implement a
		* subclass of BackupService, and declare an intent filter
		* in the application manifest specifying that your BackupService subclass
		* handles the {link #SERVICE_ACTION} intent action. For example:
		* handles the {@link BackupService#SERVICE_ACTION} intent action. For example:
		*
		* <pre class="prettyprint">
		* <!-- Use the class "MyBackupService" to perform backups for my app -->

services/java/com/android/server/BackupManagerService.java

+115 −14

Original line number	Diff line number	Diff line
		@@ -18,14 +18,18 @@ package com.android.server;

		import android.backup.BackupService;
		import android.backup.IBackupService;
		import android.content.BroadcastReceiver;
		import android.content.ComponentName;
		import android.content.Context;
		import android.content.Intent;
		import android.content.IntentFilter;
		import android.content.ServiceConnection;
		import android.content.pm.PackageManager;
		import android.content.pm.ResolveInfo;
		import android.content.pm.ServiceInfo;
		import android.net.Uri;
		import android.os.Binder;
		import android.os.Bundle;
		import android.os.Environment;
		import android.os.Handler;
		import android.os.IBinder;
		@@ -207,29 +211,126 @@ class BackupManagerService extends IBackupManager.Stub {
		mStateDir.mkdirs();
		mDataDir = Environment.getDownloadCacheDirectory();

		// Identify the backup participants
		// !!! TODO: also watch package-install to keep this up to date
		// Build our mapping of uid to backup client services
		synchronized (mBackupParticipants) {
		addPackageParticipantsLocked(null);
		}

		// Register for broadcasts about package install, etc., so we can
		// update the provider list.
		IntentFilter filter = new IntentFilter();
		filter.addAction(Intent.ACTION_PACKAGE_ADDED);
		filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
		filter.addDataScheme("package");
		mContext.registerReceiver(mBroadcastReceiver, filter);
		}

		// ----- Track installation/removal of packages -----
		BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
		public void onReceive(Context context, Intent intent) {
		if (DEBUG) Log.d(TAG, "Received broadcast " + intent);

		Uri uri = intent.getData();
		if (uri == null) {
		return;
		}
		String pkgName = uri.getSchemeSpecificPart();
		if (pkgName == null) {
		return;
		}

		String action = intent.getAction();
		if (Intent.ACTION_PACKAGE_ADDED.equals(action)) {
		synchronized (mBackupParticipants) {
		Bundle extras = intent.getExtras();
		if (extras != null && extras.getBoolean(Intent.EXTRA_REPLACING, false)) {
		// The package was just upgraded
		updatePackageParticipantsLocked(pkgName);
		} else {
		// The package was just added
		addPackageParticipantsLocked(pkgName);
		}
		}
		}
		else if (Intent.ACTION_PACKAGE_REMOVED.equals(action)) {
		Bundle extras = intent.getExtras();
		if (extras != null && extras.getBoolean(Intent.EXTRA_REPLACING, false)) {
		// The package is being updated. We'll receive a PACKAGE_ADDED shortly.
		} else {
		synchronized (mBackupParticipants) {
		removePackageParticipantsLocked(pkgName);
		}
		}
		}
		}
		};

		// Add the backup services in the given package to our set of known backup participants.
		// If 'packageName' is null, adds all backup services in the system.
		void addPackageParticipantsLocked(String packageName) {
		List<ResolveInfo> services = mPackageManager.queryIntentServices(
		new Intent(BackupService.SERVICE_ACTION), 0);
		if (DEBUG) {
		Log.v(TAG, "Backup participants: " + services.size());
		for (ResolveInfo ri : services) {
		Log.v(TAG, " " + ri + " : " + ri.filter);
		}
		addPackageParticipantsLockedInner(packageName, services);
		}

		// Build our mapping of uid to backup client services
		private void addPackageParticipantsLockedInner(String packageName, List<ResolveInfo> services) {
		for (ResolveInfo ri : services) {
		if (packageName == null \|\| ri.serviceInfo.packageName.equals(packageName)) {
		int uid = ri.serviceInfo.applicationInfo.uid;
		HashSet<ServiceInfo> set = mBackupParticipants.get(uid);
		if (set == null) {
		set = new HashSet<ServiceInfo>();
		mBackupParticipants.put(uid, set);
		}
		if (DEBUG) {
		Log.v(TAG, "Adding " + services.size() + " backup participants:");
		for (ResolveInfo svc : services) {
		Log.v(TAG, " " + svc + " : " + svc.filter);
		}
		}

		set.add(ri.serviceInfo);
		}
		}
		}

		// Remove the given package's backup services from our known active set. If
		// 'packageName' is null, all backup services will be removed.
		void removePackageParticipantsLocked(String packageName) {
		List<ResolveInfo> services = mPackageManager.queryIntentServices(
		new Intent(BackupService.SERVICE_ACTION), 0);
		removePackageParticipantsLockedInner(packageName, services);
		}

		private void removePackageParticipantsLockedInner(String packageName, List<ResolveInfo> services) {
		for (ResolveInfo ri : services) {
		if (packageName == null \|\| ri.serviceInfo.packageName.equals(packageName)) {
		int uid = ri.serviceInfo.applicationInfo.uid;
		HashSet<ServiceInfo> set = mBackupParticipants.get(uid);
		if (set != null) {
		set.remove(ri.serviceInfo);
		if (set.size() == 0) {
		mBackupParticipants.put(uid, null);
		}
		}
		}
		}
		}

		// Reset the given package's known backup participants. Unlike add/remove, the update
		// action cannot be passed a null package name.
		void updatePackageParticipantsLocked(String packageName) {
		if (packageName == null) {
		Log.e(TAG, "updatePackageParticipants called with null package name");
		return;
		}

		// brute force but small code size
		List<ResolveInfo> services = mPackageManager.queryIntentServices(
		new Intent(BackupService.SERVICE_ACTION), 0);
		removePackageParticipantsLockedInner(packageName, services);
		addPackageParticipantsLockedInner(packageName, services);
		}

		// ----- IBackupManager binder interface -----