BaseAdapter

作者通过Java代码来实现布局，而我习惯通过.xml文件来实现，所以我对程序做了如下修改

MainActivity.java

1. public class MainActivity extends Activity
2. {
3. ListView myList;
4. TextView textView;
5. LayoutInflater inflater=null;
6. @Override
7. public void onCreate(Bundle savedInstanceState)
8. {
9. super.onCreate(savedInstanceState);
10. setContentView(R.layout.activity_main1);
11. myList = (ListView) findViewById(R.id.myList);
12. BaseAdapter adapter = new BaseAdapter()
13. {
14. @Override
15. public int getCount()
16. {
17. 个选项
18. return 40;
19. }
20. @Override
21. public Object getItem(int position)
22. {
23. return null;
24. }
25. // 重写该方法，该方法的返回值将作为列表项的ID
26. @Override
27. public long getItemId(int position)
28. {
29. return position;
30. }
31. // 重写该方法，该方法返回的View将作为列表框
32. @Override
33. public View getView(int position, View convertView , ViewGroup parent)
34. {
35. // 创建一个LinearLayout，并向其中添加两个组件 Java代码
36. // LinearLayout line = new LinearLayout(MainActivity.this);
37. // line.setOrientation(0);
38. // ImageView image = new ImageView(MainActivity.this);
39. // image.setImageResource(R.drawable.tiger);
40. // TextView text = new TextView(MainActivity.this);
41. // text.setText("第" + (position +1 ) + "个列表项");
42. // text.setTextSize(20);
43. // text.setTextColor(Color.RED);
44. // line.addView(image);
45. // line.addView(text);
46. inflater = LayoutInflater.from(MainActivity.this);
47. if (convertView == null) {
48. convertView = inflater.inflate(R.layout.linearlayout1,null);
49. }
50. textView = (TextView) convertView.findViewById(R.id.tex);
51. textView.setText("第" + (position +1 ) + "个列表项");
52. // 返回LinearLayout实例
53. return convertView;
54. }
55. };
56. myList.setAdapter(adapter);
57. }
58. }

XML文件

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:orientation="vertical"
4. android:layout_width="match_parent"
5. android:layout_height="match_parent">
6. <ListView
7. android:id="@+id/myList"
8. android:layout_width="match_parent"
9. android:layout_height="match_parent"/>
10. </LinearLayout>

linearlayout1.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:orientation="horizontal"
4. android:layout_width="match_parent"
5. android:layout_height="match_parent">
6.  
7. <ImageView
8. android:id="@+id/img"
9. android:src="@drawable/tiger"
10. android:layout_width="wrap_content"
11. android:layout_height="wrap_content"/>
12.  
13. <TextView
14. android:id="@+id/tex"
15.  
16. android:textSize="20dp"
17. android:textColor="@android:color/holo_red_light"
18. android:layout_width="wrap_content"
19. android:layout_height="wrap_content"/>
20.  
21.  
22. </LinearLayout>

效果：