Question

My idea is to set an alarm for a specific date in my application, but I want to be able to have the alarm ringing at the set date, even if my application isn’t running at all.

How can I achieve this?

Thanks in advance!

Answer 1

I’d start a service when the device is booted – that service should take care about the alarming when the time has come.

To make your service be started at boot time you need the following things in your AndroidManifest.xml

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

in the <manifest> tag

<receiver android:name="com.yourpackage.AlarmingBroadcastReceiver">  
    <intent-filter>  
        <action android:name="android.intent.action.BOOT_COMPLETED" />  
    </intent-filter>  
</receiver>

in your <application> tag

Additionally you need your AlarmingBroadcastReceiver, should look something like that to start the service:

public class AlarmingBroadcastreceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Intent startServiceIntent = new Intent(context, AlarmingService.class);
        context.startService(startServiceIntent);
    }
}

whereas AlarmingService.class is the class name of your service that finally takes care about the alarming stuff