如果我在onResume调用getMeasuredWidth（）或的getWidth（）进行布局则返回0 [英] If I call getMeasuredWidth() or getWidth() for layout in onResume they return 0

问题描述

如果我在onResume调用getMeasuredWidth（）或的getWidth（）进行布局，他们将返回0。 我认为，鉴于它尚未领取的在这一刻。

If I call getMeasuredWidth() or getWidth() for layout in onResume they returns 0. I think that view it's not drawn yet in this moment.

此外，我认为我需要把getMeasuredWidth（）或的getWidth（）在一个名为布局绘制和查看测量被称为后回调方法。 我应该用什么Android的回调方法？

Also I think that I need to put getMeasuredWidth() or getWidth() in callback method called after layout is drawn and view measurements are known. What android callback method should I use?

推荐答案

您不能使用宽/高/ getMeasuredWidth / getMeasuredHeight一个查看前的系统使得它（通常的onCreate / onResume）。

You cannot use the width/height/getMeasuredWidth/getMeasuredHeight on a View before the system renders it (typically from onCreate/onResume).

这个简单的解决方法是发布的Runnable 的布局。可运行将在查看已经奠定了之后执行。

Simple solution for this is to post a Runnable to the layout. The runnable will be executed after the View has been laid out.

BoxesLayout = (RelativeLayout) findViewById(R.id.BoxesLinearLayout);
BoxesLayout.post(new Runnable() {
    @Override
    public void run() {
        int w = BoxesLayout.getMeasuredWidth();
        int h = BoxesLayout.getMeasuredHeight();

        ...
    }
});

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