Android power save mode listener?

Question

How can an Android listener be created to perform a task just before entering power save mode? Also: what are some of the low power options that can be controlled by this ta

Answer 1

Since Lollipop (API 21) there is PowerManager#ACTION_POWER_SAVE_MODE_CHANGED broadcast intent.

So you need just to receive it:

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AndroidManifest.xml:

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PowerSaveModeReceiver.java:

public class PowerSaveModeReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(final Context context, final Intent intent) {
        if (BuildConfig.DEV_LOGS)
            Log.d(this.getClass().getName(), String.format("onReceive(context = [%s], intent = [%s])", context, intent));

        final PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
        if (pm.isPowerSaveMode()) {
            // do something
        } else {
            // do some else
        }
    }
}