Is there a way to determine whether onCreate() has just been called prior to onResume()

Question

Is there a way to determine whether onCreate() has just been called prior to onResume().

I wan't to do stuff in onCreate() for view initialization etc, but I don't want to do them again in onResume(), and I'd still like the stuff to be done each time I resume...

Is there a way to determine whether the application has just been created prior to entering the current onResume()?

Answer 1

There is no built-in system call that will tell you whether or not onResume() is being called because the activity was simply paused, or whether it's being called because the activity was entirely re-created. So you will have to track it yourself.

It's relatively easy to set a boolean in onCreate() and then check it in onResume():

public class MainActivity extends AppCompatActivity {

    private boolean didCreate;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        ...
        this.didCreate = true;
    }

    @Override
    protected void onResume() {
        ...

        if (didCreate) {
            ...
        } else {
            ...
        }

        this.didCreate = false;
    }
}