Scheduled Alarm Manager not working Android

问题:

I am trying to start an alarm service that repeats every day at a particular time. I have gone through a lot of threads on stack overflow regarding this but no luck. I followed a few tutorials: http://karanbalkar.com/2013/07/tutorial-41-using-alarmmanager-and-broadcastreceiver-in-android/ and http://javatechig.com/android/repeat-alarm-example-in-android

My service is never started and I do not understand why. Below is my code:

My Manifest file:

     <uses-sdk
            android:minSdkVersion="8"
            android:targetSdkVersion="17" />

        <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
        <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
        <uses-permission android:name="android.permission.INTERNET"/>
        <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
        <uses-permission android:name="android.permission.WAKE_LOCK" />
        <uses-permission android:name="android.permission.CAMERA" />
        <uses-permission android:name="com.android.alarm.permission.SET_ALARM" />
<application>
        <service android:name="com.paper.DownloadService" android:enabled="true"/>
                  <receiver android:name="com.paper.MyReceiver" ></receiver>
</application>

My Receiver Class:

public class MyReceiver extends BroadcastReceiver
{      
    @Override
    public void onReceive(Context rcontext, Intent intent)
    {
        Log.e("Main Activity", "inside on receive of myreceiver");
       Intent service1 = new Intent(rcontext, DownloadService.class);
       rcontext.startService(service1);

    }   
}

My Service Class:

 public class DownloadService extends Service {
    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        Log.e("Download Service", "CREATED");
    }   
    @SuppressLint({ "SimpleDateFormat", "NewApi" }) @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // TODO Auto-generated method stub

        Log.e("Download Service", "STARTED");
        return START_NOT_STICKY;
    }
 }

My Main Activity (Inside On Create Method):

AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

            Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(System.currentTimeMillis());
            calendar.set(Calendar.HOUR_OF_DAY, 15);
            calendar.set(Calendar.MINUTE, 29);

             Intent myIntent = new Intent(this, MyReceiver.class);
             pendingIntent = PendingIntent.getBroadcast(this, 0, myIntent,0);

             alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
                     AlarmManager.INTERVAL_DAY, pendingIntent);

Here, I am trying to set up my alarm at 3:29 pm every day but the service does not get started at that time or any time for that matter. Any help would be appreciated. Thanks!

回答1:

Here is what I did to get it working:

1) Added <uses-permission android:name="com.android.alarm.permission.SET_ALARM"/> to my manifest file.

2) Changed code in my Main activity to:

 AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.HOUR, 3);
        calendar.set(Calendar.MINUTE, 29);
        calendar.set(Calendar.AM_PM, Calendar.PM);

         Intent myIntent = new Intent(this, MyReceiver.class);
         pendingIntent = PendingIntent.getBroadcast(this, 0, myIntent,0);

         alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
                 AlarmManager.INTERVAL_DAY, pendingIntent);

Hope someone finds this helpful!