Run activity only once, then always run the main one

Question

As the title says, Scenario is: On first time using the app, Show Screen A. Once you are done with screen A, the button will lead to you Screen B. From now on and forever, t

Answer 1

SharedPreferences sp = getSharedPreferences("checking",MODE_PRIVATE);

String data = sp.getString("check", "");

if (data.equals("success")) {

//one time proccess code

//with follow code

SharedPreferences sp= getSharedPreferences("checking",MODE_PRIVATE);

Editor e1 = sp.edit();

e1.putString("check","success");

e1.commit();


} else {

// code for main

 Intent intent = new Intent(this, MainActivty.class);
 startActivity(intent);

}