无法获取小部件的高度 [英] Can't get height of Widgets

问题描述

获取TextView的高度/宽度时，我遇到了一个问题.

I am facing a problem when gets height/width of TextView.

我的代码:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    TextView tv1 = (TextView)findViewById(R.id.textview1);
    int h1 = tv1.getHeight();
    TextView tv2 = (TextView)findViewById(R.id.textview2);
    int h2 = tv2.getHeight();
}

h1是textview1的高度h2是textview2的高度

h1 is height of textview1 h2 is height of textview2

这些h1和h2始终等于0.

These h1 and h2 are always equal to 0.

这是怎么了?

请咨询.

谢谢.

推荐答案

View.getWidth()/View.getHeight()在测量视图之前不会给您有意义的答案.在此处了解有关 Android如何绘制视图的信息.
参见此 thread 了解何时可以使用测量尺寸.

View.getWidth()/View.getHeight() won't give you a meaningful answer until the view has been measured. Read about how android draws views here.
See this thread to get an idea of when the measured dimensions will be available.

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