Make an Acitivity on Android appear only once

Question

Well, my question is: How do I make an Activity appear only once, and then when the user opens the app again this screen does not appear, only the others. I’ll explain how my project is to be clearer

My project is very simple. There are 3 screens, the first of Registration, the second that is the "main" and the last one a recovery screen.

In the first screen the user registers an email and a password. On Monday he uses the registered password to get off the phone. And at last like I said, it’s a password recovery screen.

And I wanted that after the user made the registration on the first screen and was redirected to the second screen, the first screen no longer appear, I just want it to appear 1 time for the user to register and then no more.

Answer 1

You can do it two ways...
One is using Sharedpreferences to save a "little tag" and every time you open the app you will have to check if it is there and, if it is, do not open Activity.
The other way is to save a tag to sqlite and do the same check, but not recommend it. sharedPreferences is like this:

    private void setSharedPrefs(Context contexto,
                                       String nomeProjeto,
                                       String chave,
                                       String valor) {
        SharedPreferences sharedPreferences;
        sharedPreferences = contexto.getSharedPreferences(nomeProjeto, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.putString(chave, valor);
        editor.apply();
    }

    private String getSharedPrefs(Context contexto,
                                         String nomeProjeto,
                                         String chave) {
        SharedPreferences sharedPreferences;
        sharedPreferences = contexto.getSharedPreferences(nomeProjeto, Context.MODE_PRIVATE);
        return sharedPreferences.getString(chave, null);
    }

Use:

        setSharedPrefs(this,"meuProjeto", "meuValor", "HAHAHAHAHA");
        String risada = getSharedPrefs(this,"meuProjeto", "meuValor");
        Log.e("funcionou", risada);

In your case, put type like this in the oncreate of the first Activity:

    if(getSharedPrefs(this,"meuProjeto", "meuValor") != null){
       // Se tem algum valor guardado, chama o intent pra trocar de tela
    } else {
        // primeira vez que abriu, então seta o layout normal...
        setContentView(R.id.minhaPrimeiraActivity);
    }

Answer 2

In your case the simplest way is to save in Sharedpreferences and check if this screen has already been opened for the user.