public void onResume() {
   super.onResume();
   if (!prefs.getGoingToInfo()) {
     if (prefs.getKey().equals("")) {
       Intent loginIntent = new Intent().setClass(UcheckAndroidMain.this, Login.class);
       UcheckAndroidMain.this.startActivity(loginIntent);
     } else {
       tabHost.setCurrentTab(lastTab);
     }
   } else {
     prefs.setGoingToInfo(false);
   }
 }