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POBoot Receiver causing app to stop
 

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    <p>I have a boot reciever in my homework planner application to re-set all of the alarms that are created to remind the user of their homework being due in. Everytime my phone boots, I get "Homework planner has stopped", and I cannot figure out why. And I cannot use LogCat as it is not connecting on startup (?).</p> <p>This is my code in the boot reciever.</p> <pre><code>public class BootReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { // RE-SET ALL ALARMS FROM THE DATABASE WHEN PHONE IS TURNED ON HomeworkDatabase db = new HomeworkDatabase(context); db.open(); ArrayList&lt;HomeworkItem&gt; hwks = db.getHomeworks(); db.close(); int reminders = 0; for (int e = 0; e &lt; hwks.size(); e++) { HomeworkItem current = hwks.get(e); { Calendar c = Calendar.getInstance(); c.set(current.year, current.month, current.day, 0, 0); long alarmTime = c.getTimeInMillis(); Intent i = new Intent(HomeworkList.getAppContext(), RegularAlarm.class); i.putExtra("title", current.title); i.putExtra("id", current.id); PendingIntent pi = PendingIntent.getBroadcast( HomeworkList.getAppContext(), (int) current.id, i, 0); AlarmManager mAlarm = (AlarmManager) context .getApplicationContext().getSystemService( Context.ALARM_SERVICE); mAlarm.set(AlarmManager.RTC_WAKEUP, alarmTime, pi); reminders++; } if (current.oneDayReminder == true) { Calendar c = Calendar.getInstance(); c.set(current.year, current.month, current.day, 0, 0); c.roll(Calendar.DAY_OF_MONTH, -1); long alarmTime = c.getTimeInMillis(); Intent i = new Intent(HomeworkList.getAppContext(), OneDayAlarm.class); i.putExtra("title", current.title); i.putExtra("id", current.id); PendingIntent pi = PendingIntent.getBroadcast( HomeworkList.getAppContext(), (int) current.id, i, 0); AlarmManager mAlarm = (AlarmManager) context .getApplicationContext().getSystemService( Context.ALARM_SERVICE); mAlarm.set(AlarmManager.RTC_WAKEUP, alarmTime, pi); reminders++; } if (current.twoDayReminder == true) { Calendar c = Calendar.getInstance(); c.set(current.year, current.month, current.day, 0, 0); c.roll(Calendar.DAY_OF_MONTH, -2); long alarmTime = c.getTimeInMillis(); Intent i = new Intent(HomeworkList.getAppContext(), TwoDaysAlarm.class); i.putExtra("title", current.title); i.putExtra("id", current.id); PendingIntent pi = PendingIntent.getBroadcast( HomeworkList.getAppContext(), (int) current.id, i, 0); AlarmManager mAlarm = (AlarmManager) context .getApplicationContext().getSystemService( Context.ALARM_SERVICE); mAlarm.set(AlarmManager.RTC_WAKEUP, alarmTime, pi); reminders++; } } Log.d("hwk","BOOT COMPLETE: " + reminders + " alarms created"); Toast.makeText(context, reminders + " alarms created at boot", Toast.LENGTH_LONG); } } </code></pre> <p>Sorry for the long code snippet, but I have no idea what the problem is.</p> <p>Thanks</p> <p>EDIT: The source of the error is when creating the intent and getting the context from the for the PendingIntent.</p> <pre><code>Intent i = new Intent(HomeworkList.getAppContext(), RegularAlarm.class); </code></pre> <p>This line is causing a null pointer exception. Any idea why?</p>
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    1. USTomRichardson
    1. USTomRichardson
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    1. COadd `null` check at `hwks`. and If you want to test your code place your code in other `Activity`and connect to the debugger. To get your `errors`
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      1. POBoot Receiver causing app to stop
      1. USMohsin Naeem
    2. COCan't say much without the logcat, but surely you gotta consider making DB calls in a separate thread. The onReceive() must run quickly, if you have much to do in this method you should start a Service and do your work there.
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      1. POBoot Receiver causing app to stop
      1. USEgor
    3. COAh okay, so should I maybe use the boot reciever to open a separate activity which makes all the DB calls?
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      1. USTomRichardson
 

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