Which activity method is called when orientation changes occur?

Question

Which method of the lifecycle is called when orientation changes occur? My application executes the onResume() method or maybe reloads the whole activity becau

Answer 1

public class MainActivity extends AppCompatActivity {
private final static String TAG = "AppActivity";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.d(TAG, "onCreate(Bundle) called");
    setContentView(R.layout.activity_main);
}

@Override
public void onStart() {
    super.onStart();
    Log.d(TAG, "onStart() called");
}

@Override
public void onPause() {
    super.onPause();
    Log.d(TAG, "onPause() called");
}

@Override
public void onResume() {
    super.onResume();
    Log.d(TAG, "onResume() called");
}

@Override
public void onStop() {
    super.onStop();
    Log.d(TAG, "onStop() called");
}

@Override
public void onDestroy() {
    super.onDestroy();
    Log.d(TAG, "onDestroy() called");
}

}

1) Try to run your app on your phone and/or emulator and open the Logcat => on top of the window select Verbose.

2) Now try to change the screen orientation (ex. from portrait => landscape mode).

I hope this alternative will give you more insight into the activity lifecycle.