FrameLayout的getMeasuredHeight（）将在android中返回0 First Time

Question

final FrameLayout layout =（FrameLayout）findViewById（R.id.main_view）;

ViewTreeObserver vto = layout.getViewTreeObserver();
    vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
        public void onGlobalLayout() {
            layout.getViewTreeObserver().removeGlobalOnLayoutListener(this);
            XMAX = layout.getMeasuredWidth();
            YMAX = layout.getMeasuredHeight();

            System.out.println("==== The Y Max Is : " + (YMAX));
        }
    });

Answer 1

使用getWidth()和getHeight()。视图已经具有宽度和高度，因为在调用该侦听器时它已通过布局传递。