How to detect app is minimized from pressing home key ?

Question

By using onPause(), I can check if an activity is going to background or not. My problem is this onPause() is call each time even if I am going to another activity from this activity.

So my main problem is ,if I am minimizing the app by pressing home button I want to remove app from task manager and this code is write in each activity when app is going to background BUT not using onPause().

My code snippet is below ->

@Override
public void onPause() {
    if (isBackgroundRunning(this)){
        ExitActivity.exitApplication(getApplicationContext());
    }
    super.onPause();
}

public static boolean isBackgroundRunning(Context context) {
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    List<ActivityManager.RunningAppProcessInfo> runningProcesses = am.getRunningAppProcesses();
    for (ActivityManager.RunningAppProcessInfo processInfo : runningProcesses) {
        if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
            for (String activeProcess : processInfo.pkgList) {
                if (activeProcess.equals(context.getPackageName())) {
                    //If your app is the process in foreground, then it's not in running in background
                    return true;
                }
            }
        }
    }

    return true;
}

ExitActivity is used for remove the app from task manager.

public class ExitActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    finish();
}

public static void exitApplication(Context context) {
    Intent intent = new Intent(context, ExitActivity.class);

    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NO_ANIMATION | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);

    context.startActivity(intent);
}

}

I saw most of the questions related to this but can't find out the solution. Please help me. Thanks in advance :)

Answer 1

Try calling finish() in your onPause() method in your apps parent/launcher activity. That should kill the app when the user presses the home button