Andriod 适配器使用事例

最新推荐文章于 2024-08-13 18:41:42 发布

South__wind

最新推荐文章于 2024-08-13 18:41:42 发布

阅读量521

点赞数

分类专栏： Andriod

本文链接：https://blog.youkuaiyun.com/South__wind/article/details/43165003

版权

Andriod 专栏收录该内容

5 篇文章

订阅专栏

本文通过示例讲解了Android中自定义适配器的使用，包括GeneralAdapter、SimpleAdapter和ArrayAdapter的实现方式。从自定义适配器继承BaseAdapter开始，详细展示了如何设置数据、获取视图及绑定数据的过程。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

自定义适配器继承BaseAdapter：

    class GeneralAdapter extends BaseAdapter{

       @Override
       public int getCount() {
           return mGenerals.size();
       }

       @Override
       public GeneralBean getItem(int position) {
           return mGenerals.get(position);
       }

       @Override
       public long getItemId(int position) {
           return position;
       }

       @Override
       public View getView(int position, View convertView, ViewGroup parent) {
           //拿到ListViewItem的布局，转换为View类型的对象
           View layout=View.inflate(MainActivity.this, R.layout.item_generals, null);
           //找到显示军事家头像的ImageView
           ImageView ivThumb=(ImageView) layout.findViewById(R.id.ivThumb);
           //找到显示军事家名字的TextView
           TextView tvName=(TextView) layout.findViewById(R.id.tvName);
           //获取军事中下标是position的军事家对象
           GeneralBean bean=mGenerals.get(position);
           //显示军事家头像
           ivThumb.setImageResource(bean.getResid());
           //显示军事家的姓名
           tvName.setText(bean.getName());

           return layout;
       }

   }

SimpleAdapter：

public class MainActivity extends Activity {

   ListView mlvGenerals;
   List<Map<String, Object>> mGenerals;
   SimpleAdapter mAdapter;

   static final String KEY_PHOTOID="photoid";
   static final String KEY_NAME="name";

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       initData();//初始化数据
       initView();
   }

   private void initView() {
       mlvGenerals=(ListView) findViewById(R.id.lvGeneral);
       mAdapter=new SimpleAdapter(this, mGenerals,
           R.layout.item_generals,
           new String[]{KEY_PHOTOID,KEY_NAME},
           new int[]{R.id.ivThumb,R.id.tvName});
       mlvGenerals.setAdapter(mAdapter);
   }

   private void initData() {
       int[] resid={
               R.drawable.baiqi,R.drawable.caocao,R.drawable.chengjisihan,
               R.drawable.hanxin,R.drawable.lishimin,R.drawable.nuerhachi,
               R.drawable.sunbin,R.drawable.sunwu,R.drawable.yuefei,
               R.drawable.zhuyuanzhang
       };
       String[] names=getResources().getStringArray(R.array.generals);
       mGenerals=new ArrayList<Map<String,Object>>();
       HashMap<String, Object> general;
       for (int i = 0; i < names.length; i++) {
           general=new HashMap<String, Object>();
           general.put(KEY_PHOTOID, resid[i]);
           general.put(KEY_NAME, names[i]);
           mGenerals.add(general);
       }
   }

ArrayAdapter：

public class MainActivity extends Activity {
   ListView mlvWeek;
   ArrayAdapter<CharSequence> mAdapter;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       initView();
   }

   private void initView() {
       mlvWeek=(ListView) findViewById(R.id.lvWeek);
       mAdapter=ArrayAdapter.createFromResource(this,
               R.array.day_of_week,
               android.R.layout.simple_expandable_list_item_1);
       mlvWeek.setAdapter(mAdapter);
   }

}