Call finish() inside onPause() but not when orientation changes

Question

I have an app that needs to call finish when someone exits its main activity (so i do not want it to be paused), even by pressing home activity has to be finished, to handle this currently i simply call finish() in my onPause() method, since everything is done with fragments it works pretty well and gives no stability issues.

My only problem is that i cannot handle orientation changes since onPause() is called before onConfigurationChanged() (allowing me to disable this behavior when rotation occurs).

I could create a service that handles this but its way to complex.

Any idea?

Do you want to start your app at the MainActivity every time your app is launched? That is if your app is at activity B and the user press the home key, then when the app is launched again, it starts at MainActivity instead of activity B? — Hoan Nguyen, Apr 29 '13 at 08:35
If `onConfigurationChanged()` is called before `onStop()` you could call `finish()` in it. — rciovati, Apr 29 '13 at 09:03
@rciovati i want to finish() during onPause(), if i finish() on "onStop()" activity won't finish when its just paused. — JohnUopini, Apr 29 '13 at 13:42

score 7 · Accepted Answer · answered Apr 29 '13 at 09:03

You can use onWindowFocusChanged event instead of onPause. This function is not called when orientation changed.

@Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    Log.d(TAG, "FOCUS = " + hasFocus);
    if (!hasFocus) finish();
}

But note: this event is called when activity is still visible (like onPause()), you should use onStop if you want to finish the activity when it is really and fully invisible:

private boolean isInFocus = false;

@Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    Log.d(TAG, "FOCUS = " + hasFocus);
    isInFocus = hasFocus;
}

@Override
public void onStop() {
    super.onStop();
    if (!isInFocus) finish();
}

Thank you for solving my problem - I wanted to find a way to differentiate app minimization and orientation changes. — John Roberts, Oct 17 '13 at 13:30

score 3 · Answer 2 · answered Apr 29 '13 at 09:17

its simple just do:

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        display = ((WindowManager) getSystemService(WINDOW_SERVICE))
                .getDefaultDisplay();
        orientation = display.getOrientation();

    }

@Override
    protected void onPause() {
        // TODO Auto-generated method stub

        int orientation_ = display.getOrientation();
        if (orientation_ != orientation) {
            finish();
        }
        Log.e("hello=---->", "onPause");
        super.onPause();
    }

score 0 · Answer 3 · answered Apr 29 '13 at 08:45

0

From your question, it seems that you only have one activity, in this case you should set a flag in the manifest instead. In your MainActivity manifest add

android:clearTaskOnLaunch="true"

answered Apr 29 '13 at 08:45

Hoan Nguyen

18,033
3
50
54

Thanks Hoan, this will clear the activity on launch, but it won't finish it on exit, since i need to restart a service and free up some memory on exit i need to finish when exiting. – JohnUopini Apr 29 '13 at 08:57
Why can't you call finish() in onStop()? – Hoan Nguyen Apr 29 '13 at 09:29
onStop() is not called if you just pause the activity, and i want to finish during the pause – JohnUopini Apr 29 '13 at 13:43

score 0 · Answer 4 · answered Apr 29 '13 at 08:51

0

You could listen for orientation changes, and on the change event store a boolean value about it, like

boolean orientationChanging;

make this true when orientation is changing, and false afterwards, than in your onPause:

@Override
protected void onPause() {

    if(!orientationChanging){
                finish();
            }
}

answered Apr 29 '13 at 08:51

Analizer

1,594
16
30

This won't work since onConfigurationChanged will never be called (onPause is called first). – JohnUopini Apr 29 '13 at 08:58

Call finish() inside onPause() but not when orientation changes

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