BaseAdapter的应用

最新推荐文章于 2021-06-30 10:34:39 发布

hshm20517

最新推荐文章于 2021-06-30 10:34:39 发布

阅读量503

点赞数

CC 4.0 BY-SA版权

分类专栏： android 文章标签： string listview object null class action

本文链接：https://blog.youkuaiyun.com/hshm20517/article/details/5792634

android 专栏收录该内容

75 篇文章

订阅专栏

本文介绍了一种自定义的Android列表视图适配器实现方法，用于展示联系人信息，包括联系人姓名、电话号码及头像等，并实现了点击事件。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

直接上源码

/**
* 生成联系人Items，即Items中包含如下控件
*
*/
public final class ViewHolder{

    public ImageView callImg;//打电话的图标
    public ImageView headImg;//头像

    public TextView peopleName;//联系人名
    public TextView peopleNumber;//联系人号码
  }

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;//当初在看别人例子时，此处返回NUll，加载都没问题，但在ListView中的OnItemsClick事件中就报错了。
  }

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) {
            //处理Items中控件的触发事件
    }

});

return convertView;
}
}

*应用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);//此处需要注意，
     String peopleNumber = String.valueOf(map.get("peopleNumber"));
    }
   });