1.ListView item的高度相等的处理：

 // 获取ListView对应的Adapter
public void setListViewHeightBasedOnChildren(ListView listView){
            ListAdapter listAdapter = listView.getAdapter();
            if (listAdapter == null) {
                return;
            }
            int totalHeight = 0;
            for (int i = 0, len = listAdapter.getCount(); i < len; i++) {
                // listAdapter.getCount()返回数据项的数目
                View listItem = listAdapter.getView(i, null, listView);
                // 计算子项View 的宽高
                listItem.measure(0, 0);
                // 统计所有子项的总高度
                totalHeight += listItem.getMeasuredHeight();
            }
            ViewGroup.LayoutParams params = listView.getLayoutParams();
            params.height = totalHeight+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
             listView.setLayoutParams(params);
}

2.ListView item的高度不相等的处理：

public void setListViewHeightBasedOnChildren(ListView listView){
 ListAdapter listAdapter = listView.getAdapter();
        ViewGroup.LayoutParams params = listView.getLayoutParams();
        if (listAdapter == null) {
            // pre-condition
            return;
        }
        int totalHeight = 0;
        View view;
        for (int i = 0; i < listAdapter.getCount(); i++) {
            view = listAdapter.getView(i, null, listView);
            //宽度为屏幕宽度
            int i1 = View.MeasureSpec.makeMeasureSpec(ScreenUtils.getScreenWidth(LogisticsDetailsActivity.this), View.MeasureSpec.EXACTLY);
            //根据屏幕宽度计算高度
            int i2 = View.MeasureSpec.makeMeasureSpec(i1, View.MeasureSpec.UNSPECIFIED);
            view.measure(i1, i2);
            totalHeight += view.getMeasuredHeight();
        }
        params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
        listView.setLayoutParams(params);
}