给系统库添加文件后扫描更新系统图库

// Tell the media scanner about the new file so that it is

            // immediately available to the user.

            MediaScannerConnection.scanFile(this,

                    new String[] { file.toString() }, null,

                    new MediaScannerConnection.OnScanCompletedListener() {

                public void onScanCompleted(String path, Uri uri) {

                    Log.i("ExternalStorage", "Scanned " + path + ":");

                    Log.i("ExternalStorage", "-> uri=" + uri);

                }

            });