基于图像切换器（imageSwitcher）的支持动画的图片浏览器

利用GridView和ImageSwitcher的基本用法

1. public class MainActivity extends Activity
2. {
3. int[] imageIds = new int[]
4. {R.drawable.bomb5,R.drawable.bomb6,R.drawable.bomb7,R.drawable.bomb8, R.drawable.bomb9,R.drawable.bomb10,R.drawable.bomb11,R.drawable.bomb12,

R.drawable.bomb13,R.drawable.bomb14, R.drawable.bomb15,R.drawable.bomb16 };

1. ImageSwitcher switcher;
2. @Override
3. public void onCreate(Bundle savedInstanceState)
4. {
5. super.onCreate(savedInstanceState);
6. setContentView(R.layout.main);
7. // 创建一个List对象，List对象的元素是Map
8. List<Map<String, Object>> listItems =
9. new ArrayList<Map<String, Object>>();
10. for (int i = 0; i < imageIds.length; i++)
11. {
12. Map<String, Object> listItem = new HashMap<String, Object>();
13. listItem.put("image", imageIds[i]);
14. listItems.add(listItem);
15. }
16. // 获取显示图片的ImageSwitcher
17. switcher = (ImageSwitcher)
18. findViewById(R.id.switcher);
19. // 为ImageSwitcher设置图片切换的动画效果
20. switcher.setFactory(new ViewSwitcher.ViewFactory()
21. {
22. @Override
23. public View makeView()
24. {
25. // 创建ImageView对象
26. ImageView imageView = new ImageView(MainActivity.this);
27. imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
28. imageView.setLayoutParams(new ImageSwitcher.LayoutParams(
29. ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
30. // 返回ImageView对象
31. return imageView;
32. }
33. });
34. // 创建一个SimpleAdapter
35. SimpleAdapter simpleAdapter = new SimpleAdapter(this,
36. listItems
37. // 使用/layout/cell.xml文件作为界面布局
38. , R.layout.cell, new String[]{"image"},
39. new int[] { R.id.image1 });
40. GridView grid = (GridView) findViewById(R.id.grid01);
41. // 为GridView设置Adapter
42. grid.setAdapter(simpleAdapter);
43. // 添加列表项被选中的监听器
44. grid.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
45. {
46. @Override
47. public void onItemSelected(AdapterView<?> parent, View view,
48. int position, long id)
49. {
50. // 显示当前被选中的图片
51. switcher.setImageResource(imageIds[position]);
52. }
53. @Override
54. public void onNothingSelected(AdapterView<?> parent)
55. {
56. }
57. });
58. // 添加列表项被单击的监听器
59. grid.setOnItemClickListener(new AdapterView.OnItemClickListener()
60. {
61. @Override
62. public void onItemClick(AdapterView<?> parent, View view,
63. int position, long id)
64. {
65. // 显示被单击的图片
66. switcher.setImageResource(imageIds[position]);
67. }
68. });
69. }
70. }

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. android:gravity="center_horizontal">
7. <!-- 定义一个GridView组件 -->
8. <GridView
9. android:id="@+id/grid01"
10. android:layout_width="match_parent"
11. android:layout_height="wrap_content"
12. android:horizontalSpacing="2dp"
13. android:verticalSpacing="2dp"
14. android:numColumns="4"
15. android:gravity="center"/>
16. <!-- 定义一个ImageSwitcher组件 -->
17. <ImageSwitcher
18. android:id="@+id/switcher"
19. android:layout_marginTop="30dp"
20. android:layout_width="wrap_content"
21. android:layout_height="wrap_content"
22. android:layout_gravity="center_horizontal"
23. android:inAnimation="@android:anim/fade_in"
24. android:outAnimation="@android:anim/fade_out"/>
25. </LinearLayout>

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. android:gravity="center_horizontal"
7. android:padding="4dp">
8. <ImageView
9. android:id="@+id/image1"
10. android:layout_width="50dp"
11. android:layout_height="50dp"
12. />
13. </LinearLayout>

效果