[Android] Activity Lifecycle

참조 : http://developer.android.com/reference/android/app/Activity.html

 public class Activity extends ApplicationContext { 
     protected void onCreate(Bundle savedInstanceState); 
     protected void onStart(); 
     protected void onRestart(); 
     protected void onResume(); 
     protected void onPause(); 
     protected void onStop(); 
     protected void onDestroy(); 
 }