/*** 生成聯(lián)系人Items，即Items中包含如下控件**/public final class ViewHolder{  public ImageView callImg;//打電話(huà)的圖標(biāo)  public ImageView headImg;//頭像  public TextView peopleName;//聯(lián)系人名  public TextView peopleNumber;//聯(lián)系人號(hào)碼}public class MyAdapter extends BaseAdapter { private LayoutInflater mInflater; public MyAdapter(Context context) {  this.mInflater = LayoutInflater.from(context); } public int getCount() {   return listPeople.size(); } public Object getItem(int arg0) {   return listPeople.get(arg0); } public long getItemId(int arg0) {  return arg0;//當(dāng)初在看別人例子時(shí)，此處返回NUll，加載都沒(méi)問(wèn)題，但在ListView中的OnItemsClick事件中就報(bào)錯(cuò)了。 } public View getView(final int position, View convertView,  ViewGroup parent) {  ViewHolder holder = null;  if (convertView == null) {  holder = new ViewHolder();  convertView = mInflater.inflate(R.layout.peopleinfo, null);  holder.callImg = (ImageView) convertView   .findViewById(R.id.callbtn);  holder.headImg = (ImageView) convertView   .findViewById(R.id.contactImage);  holder.peopleName = (TextView) convertView   .findViewById(R.id.peopleName);  holder.peopleNumber = (TextView) convertView   .findViewById(R.id.peopleNumber);  convertView.setTag(holder);  } else {  holder = (ViewHolder) convertView.getTag();  }  final String name = (String) listPeople.get(position).get(   "peopleName");  final String num = (String) listPeople.get(position).get(   "peopleNumber");  holder.peopleName.setText((String) listPeople.get(position).get(   "peopleName"));  holder.peopleNumber.setText((String) listPeople.get(position).get(   "peopleNumber"));  //  holder.headImg.setImageResource(R.drawable.ic_menu_contact);  if(listPeople.get(position).get("peoplePhoto") != null){  holder.headImg.setImageBitmap((Bitmap)listPeople.get(position).get(  "peoplePhoto"));  }  holder.callImg.setImageResource(R.drawable.ic_dial_action_call);  holder.callImg.setOnClickListener(new View.OnClickListener() {  public void onClick(View v) {  //處理Items中控件的觸發(fā)事件  }  });  return convertView; } }/**應(yīng)用BaseAdapter**/final MyAdapter myAdapter = new MyAdapter(this);  contacts.setAdapter(myAdapter);  contacts.setOnItemClickListener(new OnItemClickListener() {  @SuppressWarnings("unchecked")  public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,   long arg3) {   Map<String, Object> map = (Map<String, Object>) myAdapter.getItem(arg2);//此處需要注意，   String peopleNumber = String.valueOf(map.get("peopleNumber"));  }});