在启动和 PreferenceChange 时启动 Android 服务

Question

As my code looks today, I'm periodically sending a alarm(?) using AlarmManager that is received by AlarmReceiver extends BroadcastReceiver which in turn starts a Service. The Service do some updating and ends with a stopSelf() . IMO this is the best way of periodically perfom a task without constantly having a Service running. Correct?

The issue with this code is however that the whole chain of events is initiated onSharedPreferenceChanged() . I (initially) thought this was a good idea since the whole updating thing is enabled by the user in SharedPreferences . I've now come to the conclusion that this is in fact not very good and that I need to initiate the AlarmManager/AlarmReceiver/Service/whatever both onPreferenceChange but also on boot.

I've done some searching but everyone seems to want to start the Service on boot. As I see it, I just need to initiate the AlarmManager which will then start the Service (when needed and only periodically).

Please help me with, first of all, sorting this out and secondly coding it! Thanks in advance!

Answer 1

Then, create and register a BroadcastReceiver where you will do the AlarmManager stuff:

public class YourBootReceiver extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {
        // do the AlarmManager here
    }
}

Then, on your manifest:

<application>
    ... other stuff
    <receiver android:name=".YourBootReceiver">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED"/>
        </intent-filter>
    </receiver>
</application>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />