Android ImageSwitcher 圖片切換 按鈕點擊切換

圖片顯示：

1. MainActivity

1. package com.gamedog.test;
3. import Android.app.Activity;
4. import android.os.Bundle;
5. import android.view.View;
6. import android.widget.Button;
7. import android.widget.ImageSwitcher;
8. import android.widget.ImageView;
9. import android.widget.ViewSwitcher.ViewFactory;
11. public class MainActivity extends Activity implements ViewFactory
12. {
14. private ImageSwitcher switcher;
15. private Button forward;
16. private Button next;
17. // 圖片索引
18. private static int index = 0;
19. // 顯示的圖片資源
21. private static final Integer[] imagelist =
22. { R.drawable.img1, R.drawable.img2, R.drawable.img3, R.drawable.img4, R.drawable.img5, R.drawable.img6 };
24. @Override
25. public void onCreate(Bundle savedInstanceState)
26. {
27. super.onCreate(savedInstanceState);
28. setContentView(R.layout.main);
30. forward = (Button) findViewById(R.id.forward);
31. next = (Button) findViewById(R.id.next);
32. switcher = (ImageSwitcher) findViewById(R.id.image);
33. switcher.setFactory(this);
34. switcher.setImageResource(imagelist[index]);
36. // 上一張
37. forward.setOnClickListener(new View.OnClickListener()
38. {
40. @Override
41. public void onClick(View view)
42. {
43. index--;
44. if (index < 0)
45. {
46. index = imagelist.length - 1;
47. }
48. switcher.setImageResource(imagelist[index]);
49. }
50. });
51. // 下一張
52. next.setOnClickListener(new View.OnClickListener()
53. {
55. @Override
56. public void onClick(View view)
57. {
58. index++;
59. if (index >= imagelist.length)
60. {
61. index = 0;
62. }
63. switcher.setImageResource(imagelist[index]);
64. }
65. });
66. }
68. // 用於顯示圖片
69. @Override
70. public View makeView()
71. {
72. return new ImageView(this);
73. }
74. }

2.布局文件

1. <?xml version="1.0" encoding="utf-8"?>
2. <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
3. android:orientation="vertical"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent">
6. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
7. android:orientation="horizontal"
8. android:layout_width="fill_parent"
9. android:layout_height="fill_parent"
10. android:gravity="center"
11. android:background="#f0f0f0"
12. >
13. <Button
14. android:id="@+id/forward"
15. android:layout_width="wrap_content"
16. android:layout_height="wrap_content"
17. android:background="@drawable/left_btn"
18. android:layout_gravity="center"
19. />
20. <ImageSwitcher
21. android:id="@+id/image"
22. android:layout_width="wrap_content"
23. android:layout_height="wrap_content"
24. android:layout_marginLeft="20dp"
25. android:layout_marginRight="20dp"
26. />
27. <Button
28. android:id="@+id/next"
29. android:layout_width="wrap_content"
30. android:layout_height="wrap_content"
31. android:background="@drawable/right_btn"
32. android:layout_gravity="center"
33. />
35. </LinearLayout>
36. </ScrollView>