1、自定义provider 包含两个查询：全名查询和模糊查询

Java代码
  1. packagecom.HelloWorld;
  3. importjava.io.File;
  4. importjava.io.FileOutputStream;
  5. importjava.io.IOException;
  6. importjava.io.InputStream;
  8. importandroid.content.ContentProvider;
  9. importandroid.content.ContentValues;
  10. importandroid.content.Context;
  11. importandroid.content.UriMatcher;
  12. importandroid.database.Cursor;
  13. importandroid.database.sqlite.SQLiteDatabase;
  14. importandroid.net.Uri;
  15. importandroid.os.Environment;
  17. publicclassMyProviderextendsContentProvider{
  20. privatefinalstaticStringDB_DIR="lp";
  21. privatefinalstaticStringDB_NAME="contacts.db";
  22. privatefinalstaticStringTABLE_NAME="PRMContacts";
  23. privateContextmContext;
  24. privateSQLiteDatabasedb;
  25. privatestaticfinalStringAUTHORITY="com.helloword.myprovider";
  26. privatestaticUriMatcheruriMatcher;
  27. privatestaticfinalintONE=1;
  28. privatestaticfinalintMORE=2;
  29. static
  30. {
  31. //添加访问ContentProvider的Uri
  32. uriMatcher=newUriMatcher(UriMatcher.NO_MATCH);
  33. uriMatcher.addURI(AUTHORITY,"one",ONE);
  34. uriMatcher.addURI(AUTHORITY,"more/*",MORE);
  35. }
  37. @Override
  38. publicintdelete(Uriuri,Stringselection,String[]selectionArgs){
  39. //TODOAuto-generatedmethodstub
  40. return0;
  41. }
  43. @Override
  44. publicStringgetType(Uriuri){
  45. //TODOAuto-generatedmethodstub
  46. returnnull;
  47. }
  49. @Override
  50. publicUriinsert(Uriuri,ContentValuesvalues){
  51. //TODOAuto-generatedmethodstub
  52. returnnull;
  53. }
  55. @Override
  56. publicbooleanonCreate(){
  57. mContext=getContext();
  58. db=openDatabase();
  59. returntrue;
  60. }
  62. @Override
  63. publicCursorquery(Uriuri,String[]projection,Stringselection,String[]selectionArgs,StringsortOrder){
  64. Cursorcursor=null;
  65. System.out.println("query");
  66. switch(uriMatcher.match(uri)){
  67. caseONE:
  68. cursor=db.query(TABLE_NAME,projection,selection,selectionArgs,null,null,sortOrder);
  69. break;
  70. caseMORE:
  71. Stringword=uri.getPathSegments().get(1);
  72. cursor=db.rawQuery("select*from"+TABLE_NAME+"wheredisplaynamelike?",newString[]{word+"%"});
  73. break;
  74. default:
  75. thrownewIllegalArgumentException("无效参数");
  76. }
  77. returncursor;
  78. }
  80. @Override
  81. publicintupdate(Uriuri,ContentValuesvalues,Stringselection,String[]selectionArgs){
  82. //TODOAuto-generatedmethodstub
  83. return0;
  84. }
  86. privateSQLiteDatabaseopenDatabase()
  87. {
  88. if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
  89. FileOutputStreamfos=null;
  90. InputStreamis=null;
  91. try
  92. {
  93. Stringpath=Environment.getExternalStorageDirectory().getAbsolutePath()+"/"+DB_DIR;
  95. //获得dictionary.db文件的绝对路径
  96. StringdatabaseFilename=path+"/"+DB_NAME;
  97. Filedir=newFile(path);
  99. if(!dir.exists()){
  100. dir.mkdir();
  101. }
  103. Filedb=newFile(databaseFilename);
  104. if(!db.exists()){
  105. fos=newFileOutputStream(db);
  106. is=mContext.getResources().openRawResource(R.raw.contacts);
  108. byte[]buffer=newbyte[1024];
  109. intlength=0;
  110. while((length=is.read(buffer))!=-1){
  111. fos.write(buffer,0,length);
  112. }
  113. }
  115. SQLiteDatabasedatabase=SQLiteDatabase.openOrCreateDatabase(databaseFilename,null);
  116. returndatabase;
  117. }
  118. catch(Exceptione){
  120. }finally{
  121. if(fos!=null){
  122. try{
  123. fos.close();
  124. }catch(IOExceptione){
  125. //TODOAuto-generatedcatchblock
  126. e.printStackTrace();
  127. }
  128. }
  129. if(is!=null){
  130. try{
  131. is.close();
  132. }catch(IOExceptione){
  133. //TODOAuto-generatedcatchblock
  134. e.printStackTrace();
  135. }
  136. }
  137. }
  138. }
  140. returnnull;
  141. }
  143. }


xml注册：

Java代码
  1. <receiverandroid:name=".MyBroadcast">
  2. <intent-filter>
  3. <actionandroid:name="com.lp.MyBroadcast"/>
  4. </intent-filter>
  5. </receiver>
  6. <providerandroid:name=".MyProvider"android:authorities="com.helloword.myprovider"/>


权限：

Java代码
  1. <!--在SDCard中创建与删除文件权限-->
  2. <uses-permissionandroid:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
  3. <!--往SDCard写入数据权限-->
  4. <uses-permissionandroid:name="android.permission.WRITE_EXTERNAL_STORAGE"/>



2、另一个应用调用：

Java代码
  1. privateButtonfind;
  2. privateTextViewname;
  3. privatestaticfinalStringONE="content://com.helloword.myprovider/one";
  4. privatestaticfinalStringMORE="content://com.helloword.myprovider/more";
  5. find.setOnClickListener(newOnClickListener(){
  7. @Override
  8. publicvoidonClick(Viewv){
  9. Stringstr=name.getText().toString();
  10. if(str!=null){
  11. //findTelByName(str);
  12. findTelsByName(str);
  13. }
  14. }
  15. });
  17. privatevoidfindTelByName(Stringname){
  18. Uriuri=Uri.parse(ONE);
  19. Cursorcursor=getContentResolver().query(uri,null,"displayname=?",newString[]{name},null);
  20. Stringresult="没有找到电话";
  21. if(cursor!=null){
  22. cursor.moveToNext();
  23. result=cursor.getString(cursor.getColumnIndex("telnum"));
  24. }
  25. Toast.makeText(this,result,1).show();
  26. }
  27. privatevoidfindTelsByName(Stringname){
  28. Uriuri=Uri.parse(MORE+"/"+name);
  29. Cursorcursor=getContentResolver().query(uri,null,null,null,null);
  30. Stringresult="";
  31. if(cursor!=null){
  32. while(cursor.moveToNext()){
  33. result+=cursor.getString(cursor.getColumnIndex("telnum"));
  34. result+=",";
  35. }
  37. }
  38. if(!result.equals(""))
  39. Toast.makeText(this,result,1).show();
  40. }


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