if(intent != null){
yourString = intent.getStringExtra("count");
}

protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putString("count", yourString);//or int or other look on developers
  }

protected void onRestoreInstanceState(Bundle savedInstanceState) {
    super.onRestoreInstanceState(savedInstanceState);
    yourString = savedInstanceState.getString("count");
  }