private void setListViewHeightBasedOnChildren(ListView listView) {
// 獲取ListView對應的Adapter
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
return;
}
int totalHeight = 0;
for (int i = 0, len = listAdapter.getCount(); i < len; i++) {
// listAdapter.getCount()返回數據項的數目
View listItem = listAdapter.getView(i, null, listView);
// 計算子項View 的寬高
listItem.measure(0, 0);
// 統計所有子項的總高度
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight
+ (listView.getDividerHeight() * (listAdapter.getCount() - 1))
+ 100;
// listView.getDividerHeight()獲取子項間分隔符占用的高度
// params.height最后得到整個ListView完整顯示需要的高度
listView.setLayoutParams(params);
}
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