Android桌面组件开发之实时文件夹（Live_Folders）

?实时文件夹是一种用来显示由某个ContentProvider提供的数据信息的桌面组件。

有定义就可以知道，必须要定义一个ContentProvider，或者用系统自带的ContentProvider，系统自带的Contacts（联系人）程序已经实现了对实时文件夹的支持（关于如何实现自己的ContentProvider，并支持实时文件夹，下次笔记总结）。

MyAllContacts.java文件代码：

Code:

1.???? package?com.myAllContacts.test;??

2.???? ??

3.???? import?android.app.Activity;??

4.???? import?android.content.Intent;??

5.???? import?android.net.Uri;??

6.???? import?android.os.Bundle;??

7.???? import?android.provider.Contacts;??

8.???? import?android.provider.LiveFolders;??

9.???? ??

10.? public?class?MyAllContacts?extends?Activity?{??

11.? ????public?static?final?Uri?LIVE_FOLDER_URI?=?Uri??

12.? ????????????.parse("content://contacts/live_folders/people");??

13.? ??

14.? ????/**?Called?when?the?activity?is?first?created.?*/??

15.? ????@Override??

16.? ????public?void?onCreate(Bundle?savedInstanceState)?{??

17.? ????????super.onCreate(savedInstanceState);??

18.? ??

19.? ????????/*if?(getIntent().getAction().equals(?

20.? ?????????*?我认为这里无需判断，既然已经在AndroidMainfest.xml文件里配置了，如若能打开这个Activity，?

21.? ?????????*?证明这个判断就通过，这里就多此一举。?

22.? ????????????????LiveFolders.ACTION_CREATE_LIVE_FOLDER))?{*/??

23.? ????????????Intent?intent?=?new?Intent();??

24.? ????????????intent.setData(LIVE_FOLDER_URI);??

25.? ????????????intent??

26.? ????????????????????.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_NAME,??

27.? ????????????????????????????"MyAllContacts");??

28.? ????????????intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_BASE_INTENT,??

29.? ????????????????????new?Intent(Intent.ACTION_VIEW,?Contacts.People.CONTENT_URI));??

30.? ????????????intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_ICON,??

31.? ????????????????????Intent.ShortcutIconResource.fromContext(this,??

32.? ????????????????????????????R.drawable.my_icon));??

33.? ????????????intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_DISPLAY_MODE,??

34.? ????????????????????LiveFolders.DISPLAY_MODE_LIST);??

35.? ????????????setResult(RESULT_OK,?intent);??

36.? ????????/*}?else?{*/??

37.? ????????????//setResult(RESULT_CANCELED);??

38.? ????????//}??

39.? ??

40.? ????????finish();??

41.? ??

42.? ????}??

43.? }??

AndroidManifest.xml

Code:

1.???? <?xml?version="1.0"?encoding="utf-8"?>??

2.???? <manifest?xmlns:android="http://schemas.android.com/apk/res/android"??

3.???? ??????package="com.myAllContacts.test"??

4.???? ??????android:versionCode="1"??

5.???? ??????android:versionName="1.0">??

6.???? ????<application?android:icon="@drawable/icon"?android:label="@string/app_name">??

7.???? ????????<activity?android:name=".MyAllContacts"??

8.???? ??????????????????android:label="@string/app_name">??

9.???? ????????????<intent-filter>??

10.? ????????????????<action?android:name="android.intent.action.CREATE_LIVE_FOLDER"?/>??

11.? ????????????????<category?android:name="android.intent.category.DEFAULT"?/>??

12.? ????????????</intent-filter>??

13.? ????????</activity>??

14.? ??

15.? ????</application>??

16.? ????<uses-sdk?android:minSdkVersion="8"?/>??

17.? ??

18.? </manifest>???

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