Mediascanner不适用于2.2及以上版本

Question

有人可以告诉我为什么以下在2.1而不是在2.2或3.1上工作正常吗？最终的Toast消息甚至显示MediaScanner已完成。

    scanner = new MediaScannerConnection(this,
            new MediaScannerConnection.MediaScannerConnectionClient () {

                public void onMediaScannerConnected() {
                    Log.v("SCANNER"," CONNECTED: "+outputFile.getPath());
                    scanner.scanFile(outputFile.getPath(), null);

               }

                public void onScanCompleted(String path, Uri uri) {
                    if (path.equals(outputFile.getPath())) {

                        PhotoPager.this.runOnUiThread(new Runnable() {
                            public void run() {
                                Toast
                                    .makeText(PhotoPager.this,
                                        "Image has been saved",
                                        Toast.LENGTH_SHORT)
                                    .show();
                            }
                        }); 

                    }
                    scanner.disconnect();
                }
           }
     );

Answer 1

也许有点晚了，但我使用了这段代码（适用于2.3.3）

sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + Environment.getExternalStorageDirectory())));