Get width of button in layout at runtime.

 Simple code snippet Get width of button in layout at runtime. 

final ViewTreeObserver observer = openButton.getViewTreeObserver();

observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

@Override

public void onGlobalLayout() {

widthButton = openButton.getWidth();

tXWidth = width - widthButton;

frameLayout.setTranslationX(tXWidth - leftMargin);

}

});