Question

I’m building an android app which requires me to prompt the user for his name the first time the user launches the app. During the second time onwards, the application won’t prompt the user for his name instead it will greet the user instead(and straight away go to the main menu page. Does anybody know how I might do this?

Answer 1

Use this code:

        File file = new File("username.txt");

        // if file doesnt exists, then prompt username alert dialog
        if (!file.exists()) {
          //prompt for username
          file.createNewFile();
        }

        FileWriter fw = new FileWriter(file.getAbsoluteFile());
        BufferedWriter bw = new BufferedWriter(fw);
        //suppose  EditText_UserName is your edittext where he can enter his name
        bw.write(EditText_UserName.getText().toString());
        bw.close();

Everytime you start the application, check for this file using file.exists and continue.