Is that possible to check was onCreate called because of orientation change?

Question

I need to act differently in onStart() method depending on how onCreate() was called in result of orientation change or not. Is that

Answer 1

As others have said, save the state:

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

        if(savedInstanceState == null) {
            // app started afresh, don't check orientation
            /* do application first-run stuff */
        } else {
            // re-started, so check for orientation change
            boolean orientationChanged = false;
            if(savedInstanceState != null) {
                int lastOrientation = savedInstanceState.getInt("last_orientation");
                orientationChanged = (getOrientation() != lastOrientation);
            }

            if(orientationChanged) {
                // orientation changed
                /* do stuff */
            } else {
                // orientation has not changed
                /* do stuff */
            }
        }
    }

    @Override
    public void onSaveInstanceState(Bundle savedInstanceState) {
        super.onSaveInstanceState(savedInstanceState);
        savedInstanceState.putInt("last_orientation", getOrientation());
    }

    private int getOrientation() {
        // ...
    }
}