Shared Preferences button back splash with android exam

//Splash
public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.loading);
        app_preferences = PreferenceManager.getDefaultSharedPreferences(this);
        check = app_preferences.getInt("check", 1);
    }
//
protected void onResume() {
        // TODO Auto-generated method stub
        if(check==1){
            newTimerCounter(3);
        }else {
            finish();
        }
        super.onResume();
    }
//Activity Main
public boolean onKeyDown(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
         if ((keyCode == KeyEvent.KEYCODE_BACK)) {
             SplashActivity.check = 0;
             Log.d(this.getClass().getName(), "back button pressed");
            }
            return super.onKeyDown(keyCode, event);

    }