ACTION_BATTERY_CHANGED doesn't work

Question

I have a small problem in Androidstudio with my battery status app. I have the following receiver:

<receiver android:name=".PowerConnectionReceiver">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED"/>
        <action android:name="android.intent.action.BATTERY_CHANGED"/>
        <action android:name="android.intent.action.ACTION_POWER_CONNECTED"/>
        <action android:name="android.intent.action.ACTION_POWER_DISCONNECTED"/>
    </intent-filter>

But the PowerConnectionReceiver only work with the ACTION_POWER_* event. The battery change event is not working

public class PowerConnectionReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {

    if (intent.getAction().equals(Intent.ACTION_POWER_CONNECTED)) 
        Toast.makeText(context, "Loading", Toast.LENGTH_SHORT).show();  

    else if (intent.getAction().equals(Intent.ACTION_POWER_DISCONNECTED)) 
        Toast.makeText(context, "not loading", Toast.LENGTH_SHORT).show();

    Toast.makeText(context, "test toast", Toast.LENGTH_SHORT).show();
}
}



Intent intent = getApplicationContext().registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));

Answer 1

You forgot to instantiate your PowerConnectionReceiver.

Intent intent = getApplicationContext().registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));

should be

Intent intent = getApplicationContext().registerReceiver(PowerConnectionReceiver() , new IntentFilter(Intent.ACTION_BATTERY_CHANGED));

Even better would be to keep a reference, so you can unregister again in onStop().