public void save(){
        String arquivo;//Log.i("VALOR", campos);
        String dados = "teste@teste.com" + "," + "123456";
        try {
             FileOutputStream fos = openFileOutput(arquivo, Context.MODE_PRIVATE);
             fos.write(dados.getBytes());
             fos.close();
             Log.i("VALOR", arquivo);
        } catch (Exception e) {
             E.printStackTrace();
        }
    }

    public void ler() {
        String email = "";
        String senha = "";
        String temp = "";
        try {
            FileInputStream fin = openFileInput(arquivo);

            int c;
            int ok = 0;

            while ((c = fin.read()) != -1) {
                if (!(Character.toString((char) c).equals(",")) && ok != 1) {
                    email = email + Character.toString((char) c);
                } else if (ok == 0) {
                    ok = 1;
                }
                if (!(Character.toString((char) c).equals(",")) && ok == 1) {
                    senha = senha + Character.toString((char) c);
                }
                temp = temp + Character.toString((char) c);
            }

            Log.i("VALORES", "Valor Email: " + email);
            Log.i("VALORES", "Valor Senha: " + senha);
            Log.i("VALORES", "Valor Temp: " + temp);

        } catch (Exception e) {

        }
    }