Java MediaScannerConnection，此语法赢得'；不编译

我正在尝试将SD卡上数据目录中的文件添加到mediastore内容提供程序。然而，我担心我可能会面临java教育问题。MediaScannerConnectionClient据称是MediaScannerConnection的一个嵌套类，但此语法无法编译

以下是MediaScannerConnection API的链接：

参考扫描仪的合适方式是什么

谢谢

final String filename = (new File(img.uri.toString())).getAbsolutePath().substring(6);

        final MediaScannerConnection scanner = new MediaScannerConnection(this,
                new MediaScannerConnectionClient() {
                    public void onMediaScannerConnected() {
                        MediaScannerConnection.this.scanFile(filename, null /*mimeType*/);
                    }

                    public void onScanCompleted(String path, Uri uri) {
                         MediaScannerConnection.this.disconnect();
                    }
            });
        scanner.connect();

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我终于在一个例子中找到了答案

…/android-8/ApiDemos/src/com/example/android/api/content/ExternalStorage.java

// Tell the media scanner about the new file so that it is
// immediately available to the user.
MediaScannerConnection.scanFile(this,
    new String[] { filename }, null,
    new MediaScannerConnection.OnScanCompletedListener() {
    public void onScanCompleted(String path, Uri uri) {
    Log.i("ExternalStorage", "Scanned " + path + ":");
        Log.i("ExternalStorage", "-> uri=" + uri);
    }
});