Content Provider contentprovider

 

1. First, add the content provider code to the application that needs to provide the content provider.

    

2. Package com. example. sqllite;

3.  

4. Import com. example. sqllite. servise. dbopenhelp;

5.  

6. Import Android. content. contentprovider;

7. Import Android. content. contenturis;

8. Import Android. content. contentvalues;

9. Import Android. content. urimatcher;

10. Import Android. database. cursor;

11. Import Android. database. SQLite. sqlitedatabase;

12. Import android.net. Uri;

13.  

14. Public class personprovider extends contentprovider {

15.  

16. Private dbopenhelp;

17. // URI matching to check whether the request matches

18. Private Static final urimatcher matcher = new urimatcher (urimatcher. no_match );

19. Private Static final int success = 1;

20. Static {

21. Matcher. adduri ("com. contentprovide. providers. personprovides", "person", success );

22. }

23.  

24. @ Override

25. Public Boolean oncreate (){

26. Dbopenhelp = new dbopenhelp (this. getcontext ());

27. Return true;

28. }

29. @ Override

30. Public int Delete (URI Uri, string selection, string [] selectionargs ){

31. // Todo auto-generated method stub

32. Return 0;

33. }

34.  

35. @ Override

36. Public String GetType (URI ){

37. // Todo auto-generated method stub

38. Return NULL;

39. }

40.  

41. @ Override

42. Public URI insert (URI Uri, contentvalues values ){

43. Sqlitedatabase DB = dbopenhelp. getwritabledatabase ();

44. Switch (matcher. Match (URI )){

45. Case success:

46. Long rowid = dB. insert ("person", "name", values );

47. // URI inserturi = URI. parse ("content: // com. contentprovide. providers. personprovides/person/" + rowid );

48. Uri inserturi = contenturis. withappendedid (Uri, rowid );

49. DB. Close ();

50. Return inserturi;

51.  

52. Default:

53. Throw new illegalargumentexception ("unknown UIR ");

54. }

55. }

56.  

57.  

58.  

59. @ Override

60. Public cursor query (URI Uri, string [] projection, string selection,

61. String [] selectionargs, string sortorder ){

62. // Todo auto-generated method stub

63. Return NULL;

64. }

65.  

66. @ Override

67. Public int Update (URI Uri, contentvalues values, string selection,

68. String [] selectionargs ){

69. // Todo auto-generated method stub

70. Return 0;

71. }

72.  

73. }

2. Add configuration items to the original application

<? XML version = "1.0" encoding = "UTF-8"?>

<Manifest xmlns: Android = "http://schemas.android.com/apk/res/android"

Package = "com. example. sqllite"

Android: versioncode = "1"

Android: versionname = "1.0" type = "codeph" text = "/codeph">

 

<Uses-SDK

Android: minsdkversion = "8"

Android: targetsdkversion = "18"/>

 

<Application

Android: allowbackup = "true"

Android: icon = "@ drawable/ic_launcher"

Android: Label = "@ string/app_name"

Android: theme = "@ style/apptheme">

<Activity

Android: Name = "com. example. sqllite. mainactivity"

Android: Label = "@ string/app_name">

<Intent-filter>

<Action Android: Name = "android. Intent. Action. Main"/>

 

<Category Android: Name = "android. Intent. Category. launcher"/>

</Intent-filter>

</Activity>

<! -- Add content provider configuration -->

<Provider Android: Name = ". personprovider" Android: Authorities = "com. contentprovide. providers. personprovides"/>

</Application>

 

</Manifest>

3. access in the new application

Uri uri = URI. parse ("content: // com. contentprovide. providers. personprovides/person ");

// Access the help class of contentprovider

Contentresolver resolver = This. getapplicationcontext (). getcontentresolver ();

Contentvalues values = new contentvalues ();

Values. Put ("name", "hahha ");

Values. Put ("Age", 33 );

Values. Put ("amount", "123 ");

Resolver. insert (Uri, values );

 

 

Content Provider contentprovider