Question

I am defining some animations based on the inflated dimensions of some UI controls. What is the earliest point in the Activity life cycle I can tap into to know when the UI elements have been sized and I can query them for their dimensions?

Answer 1

Per Rich’s request:

You can determine when the width and height by using the GlobalLayoutListener like so:

final View myView = findViewById(R.id.id_of_view);
ViewTreeObserver vto = myView.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
  @Override
  public void onGlobalLayout() {
    int viewHeight = myView.getHeight();
    int viewWidth = myView.getWidth();

    // Do what you want with the width and height

    ViewTreeObserver obs = myView.getViewTreeObserver();
    obs.removeGlobalOnLayoutListener(this);
   }
  });

Full (better) answer: How to retrieve the dimensions of a view?