判断桌面快捷方式是否已经创建

一般情况况下判断为以下代码：

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/**       * 判断桌面是否已经创建了快捷图标       *        * @param context       * @param packageName       * @return       */      public static boolean getIsOnDesktopByPkgName(Context context, String packageName) {          final ContentResolver cr = context.getContentResolver();          String authority =  "com.android.launcher.settings" ;          int sdk = android.os.Build.VERSION.SDK_INT;          if  (sdk >= 8 && sdk < 19) {              authority =  "com.android.launcher2.settings" ;          }  else  if  (sdk >= 19) {              authority =  "com.android.launcher3.settings" ;          }          final Uri CONTENT_URI = Uri.parse( "content://"  + authority +  "/favorites?notify=true" );              Cursor c =  null ;          try  {              c = cr.query(CONTENT_URI,  new  String[] {  "title" ,  "intent"  },  "" ,  new  String[] {},  null );              if  (c !=  null ) {                  final int intentIndex = c.getColumnIndexOrThrow( "intent" );                  while  (c.moveToNext()) {                      String intentDescription = c.getString(intentIndex);                      Intent intent =  null ;                      try  {                          if  (!StringUtils.isEmpty(intentDescription)) {                              intent = Intent.parseUri(intentDescription, 0);                          }                      }  catch  (URISyntaxException e) {                          continue ;                      }                      if  (intent !=  null  && intent.getComponent() !=  null ) {                          String pkgName = intent.getComponent().getPackageName();                          if  (packageName.equals(pkgName)) {                              return  true ;                          }                      }                  }              }          } finally {              if  (c !=  null  && !c.isClosed()) {                  c.close();              }          }          return  false ;      }          return  false ;      }

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public static boolean hasShortcut(Activity activity, String shortcutName) {          String url =  "" ;          url =  "content://"  + getAuthorityFromPermission(activity,  "com.android.launcher.permission.READ_SETTINGS" )                  +  "/favorites?notify=true" ;          ContentResolver resolver = activity.getContentResolver();          Cursor cursor = resolver.query(Uri.parse(url),  new  String[] {  "title" ,  "iconResource"  },  "title=?" ,                  new  String[] { shortcutName },  null );          if  (cursor !=  null  && cursor.moveToFirst()) {              cursor.close();              return  true ;          }          return  false ;      }

上面的getAuthorityFromPermission(Activity activity,String shortcutname)代码如下： private static String getAuthorityFromPermission(Context context, String permission) {          if  (permission ==  null )              return  null ;          List<PackageInfo> packs = context.getPackageManager().getInstalledPackages(PackageManager.GET_PROVIDERS);          if  (packs !=  null ) {              for  (PackageInfo pack : packs) {                  ProviderInfo[] providers = pack.providers;                  if  (providers !=  null ) {                      for  (ProviderInfo provider : providers) {                          if  (permission.equals(provider.readPermission))                              return  provider.authority;                          if  (permission.equals(provider.writePermission))                              return  provider.authority;                      }                  }              }          }          return  null ;      }