Android中BaseAdapter的基本用法和加载自定义布局!

 1 public class MainActivity extends Activity {
 2 
 3     ListView listView = null;
 4     @Override
 5     protected void onCreate(Bundle savedInstanceState) {
 6         super.onCreate(savedInstanceState);
 7         setContentView(R.layout.activity_main);
 8 
 9         listView = (ListView) findViewById(R.id.base_list);
10 
11         BaseAdapter baseAdapter = new BaseAdapter() {
12             @Override
13             public int getCount() {  //返回多少，显示多少个列表项
14                 return 10;
15             }
16 
17             //该方法的返回值决定第position处列表项的内容
18             @Override
19             public Object getItem(int position) {
20                 return position;
21             }
22 
23             //该方法的返回值决定 第 i 处的列表项的ID
24             @Override
25             public long getItemId(int i) {
26                 return i;
27             }
28 
29             @Override
30             public View getView(int i, View view, ViewGroup viewGroup) {
31                 //  i   表示第几项<item>的id（从 0 开始）
32                 //  view  表示每个item的view
33                 //  viewGroup  表示父容器(例如:ListView,GridView,....)
34 
35 
36                 //加载自定义的布局
37                 view = LayoutInflater.from(getApplicationContext()).inflate(R.layout.listview_item_style, null);
38 
39                 if (view != null) {
40                     TextView textView = (TextView) view.findViewById(R.id.context);
41                     textView.setText("我爱你中国!!!" + i);
42                     textView.setTextSize(24);
43 
44                     ImageView imageView = (ImageView) view.findViewById(R.id.image);
45                     imageView.setBackgroundResource(R.drawable.ic_launcher);
46                 }
47                 return view;
48             }
49         };
50 
51         //设置baseAdapter
52         listView.setAdapter(baseAdapter);
53     }
54 }