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Commit 1f53186f authored by James Lemieux's avatar James Lemieux
Browse files

Recreate all AlarmInstances on restore 

This approach guarantees that no AlarmInstance state from the
backup device influences behavior on the restore device.

All newly scheduled AlarmInstances will be for the future. There
cannot be, for example, notifications for AlarmInstances that
were missed on the backup device.

Bug: 22798579
Change-Id: Ia73bcc16c683cb0e3602f39028a347b30900fbd4
parent ecd49f48

src/com/android/deskclock/DeskClockBackupAgent.java

+26 −1
Original line number Diff line number Diff line
@@ -23,12 +23,18 @@ import android.os.ParcelFileDescriptor; 
import android.support.annotation.NonNull;



import com.android.deskclock.alarms.AlarmStateManager;

import com.android.deskclock.provider.Alarm;

import com.android.deskclock.provider.AlarmInstance;



import java.io.File;

import java.io.IOException;

import java.util.Calendar;

import java.util.List;



public class DeskClockBackupAgent extends BackupAgent {



    private static final String TAG = "DeskClockBackupAgent";



    @Override

    public void onBackup(ParcelFileDescriptor oldState, BackupDataOutput data,

            ParcelFileDescriptor newState) throws IOException { }
@@ -53,6 +59,25 @@ public class DeskClockBackupAgent extends BackupAgent { 
    @Override

    public void onRestoreFinished() {

        // Now that alarms have been restored, schedule them in AlarmManager.

        AlarmStateManager.fixAlarmInstances(this);

        final List<Alarm> alarms = Alarm.getAlarms(getContentResolver(), null);



        final Calendar now = Calendar.getInstance();

        for (Alarm alarm : alarms) {

            // Remove any instances that may currently exist for the alarm;

            // these aren't relevant on the restore device and we'll recreate them below.

            AlarmStateManager.deleteAllInstances(this, alarm.id);



            if (alarm.enabled) {

                // Create the next alarm instance to schedule.

                AlarmInstance alarmInstance = alarm.createInstanceAfter(now);



                // Add the next alarm instance to the database.

                alarmInstance = AlarmInstance.addInstance(getContentResolver(), alarmInstance);



                // Schedule the next alarm instance in AlarmManager.

                AlarmStateManager.registerInstance(this, alarmInstance, true);

                LogUtils.i(TAG, "DeskClockBackupAgent scheduled alarm instance: %s", alarmInstance);

            }

        }

    }

}
 
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