Get Layout Width and Height AFTER the form has been created

Question

Hello im interested in getting the layouts width and height using android once the layout has been loaded, and then depending on the these measurements to create pictures , textboxes , button with proper dimensions for the Android device that my game runs into ! How is this possible ? in which function should i put the following code :

layout.getWidth();
layout.getHeight();

so it wont return 0 ? It would be a lot more convenient to achieve the above getting the width and height before the form actually loads but from what i have seen this much more difficult Here is my code so far trying to get these measurements :

protected void onStart() {
    super.onStart();
    txt = (TextView) findViewById(R.id.textView);
    img = (ImageView) findViewById(R.id.imageView2);
    layout = (RelativeLayout) findViewById(R.id.MyLayout);
    GameHandler();
}

public void GameHandler()
{
    txt.setText(""+layout.getHeight()) ; //this always returns 0
}

thank you for your help :)

Answer 1

OnGlobalLayoutListener is the best callback to use, I have found so far.

layout.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
         // This is a async callback. get the view size here.
         txt.setText(""+layout.getHeight()) ;
    }
});

layout has to be a class variable, otherwise you have to use the final modifier.

Answer 2

Try that

layoutView.post(new Runnable() {

        @Override
        public void run() {
            // Get width and height here
        }
    });