Execute a method after an activity is visible to user

Question

I have an activity contains too many UI controls. I want to execute a method after make the activity visible.

An example i tried:

public class Main extends Activity{      @Override     public void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.main);              MyMethod();     }      private void MyMethod(){         Toast.makeText(this, "Hi UI is fully loaded", Toast.LENGTH_SHORT).show();     } } 

But in the above sample, the message shows before the activity is visible.

Is there a way to find out, if the activity is fully visible ?

Answer 1

Move your code to onResume

@Override protected void onResume() {     super.onResume();     MyMethod(); } 

Check the activity lifecycle

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

protected void onResume () 

Called after onRestoreInstanceState(Bundle), onRestart(), or onPause(), for your activity to start interacting with the user. This is a good place to begin animations, open exclusive-access devices (such as the camera), etc.

Keep in mind that onResume is not the best indicator that your activity is visible to the user; a system window such as the keyguard may be in front. Use onWindowFocusChanged(boolean) to know for certain that your activity is visible to the user (for example, to resume a game).

Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown.

Answer 2

Move the code on to onAttachedToWindow()

@Override public void onAttachedToWindow() {    super.onAttachedToWindow();    Toast.makeText(this, "Hi UI is fully loaded", Toast.LENGTH_SHORT).show(); }