ViewTreeObserver

ViewTreeObserver

ViewTreeObserver vto =textViewLeft.getViewTreeObserver();vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {    @Override    public void onGlobalLayout() {        if (Build.VERSION.SDK_INT < 16) {            textViewLeft.getViewTreeObserver().removeGlobalOnLayoutListener(this);        }        else {            textViewLeft.getViewTreeObserver().removeOnGlobalLayoutListener(this);        }    }});