I am developing an Android app and I want to detect when the user exits my app either by clicking the Back button or the Home button.
Also, an event like onInit() would be useful in my scenario, as I just want to have the MyInıt action start at first.
onDestroy() is not called until other apps need more memory.
With the help of Application.ActivityLifecycleCallbacks you can track which activity is destroying and new activity is starting but when user swipe or back button(on last stack) then postdelayed will not call and also Activitystop and destroy will always call when you're inside your application if you want to catch user swipe or back button(on last stack) then this code will work.
public class Yourapp extends Application implements Application.ActivityLifecycleCallbacks {
private Activity currentActivity;
private Handler closecheckhandler = new Handler(Looper.getMainLooper()) {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
//do whatever you want
default:
super.handleMessage(msg);
}
}
};
@Override
public void onCreate() {
super.onCreate();
registerActivityLifecycleCallbacks(this);
}
@Override
public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
}
@Override
public void onActivityStarted(Activity activity) {
}
@Override
public void onActivityResumed(Activity activity) {
currentActivity = activity;
}
@Override
public void onActivityPaused(Activity activity) {
}
@Override
public void onActivityStopped(Activity activity) {
}
@Override
public void onActivitySaveInstanceState(Activity activity, Bundle outState) {
}
@Override
public void onActivityDestroyed(Activity destroActivity) {
if (currentActivity.equals(destroActivity)) {
closecheckhandler.sendEmptyMessage(//Custom Code);
} else {
//do whatever you want
}
}
}