Android笔记: 解决ScrollView嵌套ListView的冲突方法
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Android笔记: 解决ScrollView嵌套ListView的冲突方法
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范例:
1.MainActivity代碼:
public class MainActivity extends Activity {// 只要在設置ListView的Adapter后調用此靜態方法Utility.setListViewHeightBasedOnChildren(listview); // 即可讓ListView正確的顯示在其父ListView的ListItem中。 // 但是要注意的是,子ListView的每個Item必須是LinearLayout,不能是其他的,因為其他的Layout(如RelativeLayout) // 沒有重寫onMeasure(),所以會在onMeasure()時拋出異常。private ArrayList<String> dataList;private ListView listview;private ImageView img;@Overrideprotected 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.p_w_picpathView1);listview = (ListView) findViewById(R.id.listView1);listview.setAdapter(new BaseAdapter(){@Overridepublic 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;}@Overridepublic long getItemId(int position){return 0;}@Overridepublic Object getItem(int position){return null;}@Overridepublic int getCount(){return dataList.size();}});Utility.setListViewHeightBasedOnChildren(listview);} }2.Utility代碼
public class Utility {public static void setListViewHeightBasedOnChildren(ListView listView){ListAdapter listAdapter = listView.getAdapter();if (listAdapter == null){// pre-conditionreturn;}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);} }
轉載于:https://blog.51cto.com/glblong/1290605
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