I get confused about activiy lifecyle?

🎤 General Discussion Android
1

Hi, I am newer for android .

I read this post https://www.raywenderlich.com/127544/android-gridview-getting-started

I get confused , When screen orientation changed, why not tell gridview redraw itself. it works as well .

@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
…
// Why not call adapter dateset changed ?
}

I see log onRestoreInstanceState method called after onCreate method.

Activity main lifecyle :

onCreate → onStart → onResume (view draw finished ?) → front

How ensure change book status finish （onRestoreInstanceState） . the Gridview getting started draw iteself ?

onCreate method called not draw view ?