switch (id){

case 1 :
preferences = getSharedPreferences("MY_PREFS", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();

editor.putInt("is_auth",0);

editor.apply();

Intent intent1 = new Intent(MainActivity.this,LoginActivity.class);
intent1.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent1);
break;

case 1 :
Intent intent2 = new Intent(MainActivity.this,AboutActivity.class);
startActivity(intent2);
}