什么时候应该在片段中获得宽度视图

问题描述：

我在Linearlayout中以编程方式添加View(按钮).LinearLayout由Fragment中的XML布局.

I adding View (button) programally in Linearlayout.LinearLayout is layouted by XML in Fragment.

我想获取按钮的宽度，但总是返回0.

I want to get button width, but always return 0.

我搜索了这个问题

getWidth仅在WindowFocusChanged上起作用.

getWidth work only onWindowFocusChanged.

 public void onWindowFocusChanged(boolean hasFocus) { }

但是Fragment没有这种方法.

but Fragment do not have this method.

如何获取片段中的视图宽度?

How to get View width in Fragment?

答

查看帖子

Check out post GlobalLayoutListener. You can use the listener on your Button in onCreateView() as you have used onWindowFocusChanged. It also is more reliable than onWindowFocusChanged().

尝试如下:

  final View myView = profileContainer.findViewById(R.id.sub_page_padding);
  ViewTreeObserver vto = profilePadding.getViewTreeObserver();
  vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
      Log.d("TEST", "Height = " + myView.getHeight() + " Width = " + myView.getWidth());
      ViewTreeObserver obs = profilePadding.getViewTreeObserver();
      obs.removeGlobalOnLayoutListener(this);
    }
  });

什么时候应该在片段中获得宽度视图

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