Android中BaseAdapter的根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             @Override13             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             @Override19             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ID24             @Override25             public long getItemId(int i) {26                 return i;27             }28 29             @Override30             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view33                 //  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baseAdapter52         listView.setAdapter(baseAdapter);53     }54 }