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Commit b171e567 authored by Sunny Goyal's avatar Sunny Goyal
Browse files

Adding a method to throttle backup manager calls 

Notifying backup manager when a boolean preference changes

Bug: 22885775
Change-Id: I105013af1841f6cd87472f558fa490670ed1ba24
parent f7f8cf57

src/com/android/launcher3/LauncherBackupAgentHelper.java

+25 −5
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ import android.app.backup.BackupAgentHelper; 
import android.app.backup.BackupDataInput;

import android.app.backup.BackupManager;

import android.content.Context;

import android.content.SharedPreferences;

import android.database.Cursor;

import android.os.ParcelFileDescriptor;

import android.util.Log;
@@ -32,13 +33,13 @@ public class LauncherBackupAgentHelper extends BackupAgentHelper { 


    private static final String TAG = "LauncherBAHelper";



    private static final String KEY_LAST_NOTIFIED_TIME = "backup_manager_last_notified";



    private static final String LAUNCHER_DATA_PREFIX = "L";



    static final boolean VERBOSE = false;

    static final boolean DEBUG = false;



    private static BackupManager sBackupManager;



    /**

     * Notify the backup manager that out database is dirty.

     *
@@ -47,10 +48,29 @@ public class LauncherBackupAgentHelper extends BackupAgentHelper { 
     * @param context application context

     */

    public static void dataChanged(Context context) {

        if (sBackupManager == null) {

            sBackupManager = new BackupManager(context);

        dataChanged(context, 0);

    }



    /**

     * Notify the backup manager that out database is dirty.

     *

     * <P>This does not force an immediate backup.

     *

     * @param context application context

     * @param throttleMs duration in ms for which two consecutive calls to backup manager should

     *                   not be made.

     */

    public static void dataChanged(Context context, long throttleMs) {

        SharedPreferences prefs = Utilities.getPrefs(context);

        long now = System.currentTimeMillis();

        long lastTime = prefs.getLong(KEY_LAST_NOTIFIED_TIME, 0);



        // User can manually change the system time, which could lead to now < lastTime.

        // Re-backup in that case, as the backup will have a wrong lastModifiedTime.

        if (now < lastTime || now >= (lastTime + throttleMs)) {

            BackupManager.dataChanged(context.getPackageName());

            prefs.edit().putLong(KEY_LAST_NOTIFIED_TIME, now).apply();

        }

        sBackupManager.dataChanged();

    }



    private LauncherBackupHelper mHelper;

src/com/android/launcher3/LauncherProvider.java

+3 −0
Original line number Diff line number Diff line
@@ -270,6 +270,9 @@ public class LauncherProvider extends ContentProvider { 
                if (mListener != null) {

                    mListener.onSettingsChanged(arg, value);

                }

                if (extras.getBoolean(LauncherSettings.Settings.NOTIFY_BACKUP)) {

                    LauncherBackupAgentHelper.dataChanged(getContext());

                }

                Bundle result = new Bundle();

                result.putBoolean(LauncherSettings.Settings.EXTRA_VALUE, value);

                return result;

src/com/android/launcher3/LauncherSettings.java

+3 −0
Original line number Diff line number Diff line
@@ -324,5 +324,8 @@ public class LauncherSettings { 


        public static final String EXTRA_VALUE = "value";

        public static final String EXTRA_DEFAULT_VALUE = "default_value";



        // Extra for set_boolean method to also notify the backup manager of the change.

        public static final String NOTIFY_BACKUP = "notify_backup";

    }

}