Repeating Alarm Manager After reboot

android, android-broadcast, android-service

Solution

You need to use a `BroadcastReceiver` and set it to respond to `BOOT_COMPLETED` messages. For example

Register your BroadcastReceiver in the manifest

<receiver android:name=".MyBootReceiver">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED" />
    </intent-filter>
</receiver>

Handle the message within your code

MyBootReceiver.java

public class MyBootReceiver extends BroadcastReceiver 
{
    private static final String TAG = "MyBootReceiver";

    public void onReceive(Context context, Intent intent) {
        Log.d(TAG, "onReceive");
        Calendar cal = this.getMyCalendar();
        this.scheduleAlarms(context, cal);
    }

    private Calendar getMyCalendar() {
        // get your calendar object
    }

    private void scheduleAlarms(Context ctxt, Calendar c) {
        AlarmManager alarManager = (AlarmManager) ctxt.getSystemService(Context.ALARM_SERVICE);
        //notification servise  
        Intent i = new Intent(ctxt, ScheduledService.class);
        i.putExtra(ALARM_ID, 1);
        i.putExtra(NOTIFICATION_ID, 1);

        PendingIntent pi = PendingIntent.getService(ctxt, 0, i, PendingIntent.FLAG_UPDATE_CURRENT);
        alarManager.setRepeating(AlarmManager.RTC,c.getTimeInMillis(),PERIOD, pi);
    }
}

This will reset your alarm schedule on boot.

Problem

i want to create broadcast AlarmManager(repeating) with Notification message.i pass my calender object from Pickers. If i don't reboot my device it works normally. However, when i reboot my device,as you know my calander object will be null. How can i manage my repeating alarm after rebooting and how can i hold my Calendar schedules? Thanks for your ideas. ``` public class MyReceiver extends BroadcastReceiver { private static final int PERIOD = 10000; final public static String ALARM_ID = "AlarmId"; final public static String NOTIFICATION_ID = "NotificationId"; @Override public void onReceive(Context ctxt, Intent i) { } static void scheduleAlarms(Context ctxt,Calendar c) { AlarmManager alarManager = (AlarmManager) ctxt .getSystemService(Context.ALARM_SERVICE); //notification servise Intent i = new Intent(ctxt, ScheduledService.class); i.putExtra(ALARM_ID, 1); i.putExtra(NOTIFICATION_ID, 1); PendingIntent pi = PendingIntent.getService(ctxt, 0, i, PendingIntent.FLAG_UPDATE_CURRENT); alarManager.setRepeating(AlarmManager.RTC,c.getTimeInMillis(),PERIOD, pi); } ```

Original source