android - How to detect when the app goes to minimized or exit

Question

Hey I have an application where I want to now when the APP goes to onPause or onDestroy because I want to call a certain function when this happens. I tried to override the onPause in an activity and extended that activity in all project but the onPause was being called on every migration between activities (which is logical) but this is not what I want. I want to know when the user exits the app or pauses it (pressing the home button) Regards,

Answer 1

Pull this dependency in your build.gradle file:

dependencies {
implementation "android.arch.lifecycle:extensions:1.1.1"
}

Then in your Application class, use this:

public class MyApplication extends Application implements LifecycleObserver {

@Override
public void onCreate() {
    super.onCreate();
    ProcessLifecycleOwner.get().getLifecycle().addObserver(this);
}

@OnLifecycleEvent(Lifecycle.Event.ON_STOP)
private void onAppBackgrounded() {
    Log.d("MyApp", "App in background");
}

@OnLifecycleEvent(Lifecycle.Event.ON_START)
private void onAppForegrounded() {
    Log.d("MyApp", "App in foreground");
}
}

Update your AndroidManifest.xml file:

<application
    android:name=".MyApplication"
    ....>
</application>