Android PreferenceActivity : Bundle is null in onCreate method after the onSaveInstanceState

Question

I'm using the PreferenceActivity and want to restore its state while the device rotation.

I want to save the state onSaveInstanceState method:

 @Override
  protected void onSaveInstanceState(Bundle icicle) {
      super.onSaveInstanceState(icicle);

      icicle.putString("LevelsValue", levelPref.getSummary().toString());

    }

And in the onCreate method :

if (savedInstanceState!=null) 
    Toast.makeText(getApplicationContext(), "savedInstanceState is not null", Toast.LENGTH_SHORT).show();
else 
    Toast.makeText(getApplicationContext(), "savedInstanceState is null", Toast.LENGTH_SHORT).show();

And I'm always getting the savedInstanceState is null message.

I know that I can use the onStop and onResume methods, but I think that is not the right approach.

Answer 1

我通过使用的onResume和onStop方法解决了这个问题