viewpaper 抽屉

引用：http://www.apkbus.com/android-18384-1-1.html

在为ViewFlipper视图切换增加动画和Android中实现视图随手势移动中实现了视图随手势切换，现在Android中Compatibility Package提供了ViewPager可以更简便的实现视图切换,实现的效果如下:

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效果和ViewGroup一样,但是实现过程更简单.新版的Android Market和Google+都是用了ViewPager.

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说一下实现过程:

工程目录如下:

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MyPagerActivity的onCreate方法如下:

1. @Override
2. public void onCreate(Bundle savedInstanceState) {
3. super.onCreate(savedInstanceState);
4. setContentView(R.layout.main);
5. initPageContent();
6. awesomeAdapter = new MyPagerAdapter();
7. awesomePager = (ViewPager) findViewById(R.id.awesomepager);
8. awesomePager.setAdapter(awesomeAdapter);
9. }

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其中main.xml布局文件引入了ViewPager:

1. <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
2. android:orientation="vertical"
3. android:layout_width="fill_parent"
4. android:layout_height="fill_parent"
5. android:background="#a4c639">
6. <android.support.v4.view.viewpager
7. android:layout_width="match_parent"
8. android:layout_height="match_parent"
9. android:id="@+id/awesomepager"/>

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MyPagerAdapter继承了PagerAdapter:

1. private class MyPagerAdapter extends PagerAdapter{
2. @Override
3. public int getCount() {
4. return imageS.length;
5. }
6. /**
7. * Create the page for the given position.  The adapter is responsible
8. * for adding the view to the container given here, although it only
9. * must ensure this is done by the time it returns from
10. * {@link #finishUpdate()}.
11. *
12. * @param container The containing View in which the page will be shown.
13. * @param position The page position to be instantiated.
14. * @return Returns an Object representing the new page.  This does not
15. * need to be a View, but can be some other container of the page.
16. */
17. @Override
18. public Object instantiateItem(View collection, int position) {
19. View view = getLayoutInflater().inflate(R.layout.page,null);
20. ImageView imageView =(ImageView) view.findViewById(R.id.imageId);
21. imageView.setImageDrawable(imageS[position]);
22. ((ViewPager) collection).addView(view,0);
23. return view;
24. }
25. /**
26. * Remove a page for the given position.  The adapter is responsible
27. * for removing the view from its container, although it only must ensure
28. * this is done by the time it returns from {@link #finishUpdate()}.
29. *
30. * @param container The containing View from which the page will be removed.
31. * @param position The page position to be removed.
32. * @param object The same object that was returned by
33. * {@link #instantiateItem(View, int)}.
34. */
35. @Override
36. public void destroyItem(View collection, int position, Object view) {
37. ((ViewPager) collection).removeView((View) view);
38. }
39. @Override
40. public boolean isViewFromObject(View view, Object object) {
41. return view==((View)object);
42. }
43. /**
44. * Called when the a change in the shown pages has been completed.  At this
45. * point you must ensure that all of the pages have actually been added or
46. * removed from the container as appropriate.
47. * @param container The containing View which is displaying this adapter’s
48. * page views.
49. */
50. @Override
51. public void finishUpdate(View arg0) {}
52. @Override
53. public void restoreState(Parcelable arg0, ClassLoader arg1) {}
54. @Override
55. public Parcelable saveState() {
56. return null;
57. }
58. @Override
59. public void startUpdate(View arg0) {}
60. }

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其中红色代码部分负责加载Layout和想layout中填充View.这样就实现了视图的随手势切换.源代码见: <ignore_js_op> android-viewpager0.1.rar (375.4 KB, 下载次数: 813)

Android