分享程序员开发的那些事...
更新时间：2022-06-16 04:31:26
范例：
1.MainActivity代码：
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public class MainActivity extends Activity
{ // 只要在设置ListView的Adapter后调用此静态方法Utility.setListViewHeightBasedOnChildren(listview);// 即可让ListView正确的显示在其父ListView的ListItem中。// 但是要注意的是，子ListView的每个Item必须是LinearLayout，不能是其他的，因为其他的Layout(如RelativeLayout)// 没有重写onMeasure()，所以会在onMeasure()时抛出异常。 private ArrayList<String> dataList;
private ListView listview;
private ImageView img;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
dataList = new ArrayList<String>();
for (int i = 0; i < 5; i++)
{
String str = "第" + i + "行";
dataList.add(str);
}
img = (ImageView) findViewById(R.id.imageView1);
listview = (ListView) findViewById(R.id.listView1);
listview.setAdapter(new BaseAdapter()
{
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
LayoutInflater inflater = getLayoutInflater();
View layout = inflater.inflate(R.layout.item, null);
TextView tv = (TextView) layout.findViewById(R.id.tv_item);
String str = dataList.get(position);
tv.setText(str);
return layout;
}
@Override
public long getItemId(int position)
{
return 0;
}
@Override
public Object getItem(int position)
{
return null;
}
@Override
public int getCount()
{
return dataList.size();
}
});
Utility.setListViewHeightBasedOnChildren(listview);
}
} |
2.Utility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);
}
} |