Android View measure(0,0)的作用

 将view.measure(0,0)设置为0的时候表示，此时不需要考虑父控件的布局问题，直接使用getMeasuredWidth和getMeasuredHeight获取此view的自身的实际大小，可以看下面的例子：这个是在网上引用的一段代码

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    public class Utility {

            public static void setListViewHeightBasedOnChildren(ListView listView) {

                    ListAdapter listAdapter = listView.getAdapter();

                    if (listAdapter == null) {

                            // pre-condition

                            return;

                   }

                    int totalHeight = 0;

                    for (int i = 0; i < listAdapter.getCount(); i++) {

                            View listItem = listAdapter.getView(i, null, listView);

                            listItem.measure(0, 0);

                            totalHeight += listItem.getMeasuredHeight();

                    }

 

                    ViewGroup.LayoutParams params = listView.getLayoutParams();

                    params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));

                    listView.setLayoutParams(params);

            }

    }