ViewGroup中完成充气事件

问题描述

我创建了一个自定义布局延伸的ViewGroup。一切工作正常，我得到预期的布局。

I have created a custom layout which extends ViewGroup. Everything is working fine and I am getting the layout as expected.

欲动态改变在布局中的一个元素。然而，这是行不通的，因为我调用它的onCreate和到那时，整个布局是不实际（画）膨胀到屏幕上，因此没有实际尺寸。

I want to dynamically change an element in the layout. However this is not working as I am calling it in onCreate and till that time the entire layout is not actually (drawn) inflated onto the screen and hence do not have actual size.

有没有可以用来找出什么时候布局的通胀做任何活动吗？我想onFinishInflate但不会作为工作的ViewGroup有多种意见，这将被多次调用。

Is there any event which can be used to find out when the inflation of the layout is done? I tried onFinishInflate but that would not work as Viewgroup has multiple views and this would be called multiple times.

我想创建一个界面中的自定义布局类，但不知道什么时候火呢？

I am thinking of creating an interface in the Custom layout class but not sure when to fire it?

推荐答案

如果我正确地理解您的需求，一个OnGlobalLayoutListener可以给你所需要的。

If I understand your requirements correctly, an OnGlobalLayoutListener may give you what you need.

  View myView=findViewById(R.id.myView);
  myView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                //At this point the layout is complete and the 
                //dimensions of myView and any child views are known.
            }
        });

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