Android4.4强制更新媒体库

public class MediaScannerWrapper implements
            MediaScannerConnection.MediaScannerConnectionClient {
        private MediaScannerConnection mConnection;
        private String mPath;
        private String mMimeType;

        // filePath - where to scan;
        // mime type of media to scan i.e. "image/jpeg".
        // use "*/*" for any media
        public MediaScannerWrapper(Context ctx, String mime) {
            mMimeType = mime;
            mConnection = new MediaScannerConnection(ctx, this);
        }

        public void scan(String path) {
            mPath = path;
            if (mConnection.isConnected()) {
                mConnection.scanFile(mPath, mMimeType);
            } else {
                mConnection.connect();
            }
        }

        // start the scan when scanner is ready
        public void onMediaScannerConnected() {
            mConnection.scanFile(mPath, mMimeType);
        }

        public void onScanCompleted(String path, Uri uri) {
        }

        public void disConnected() {
            if (mConnection.isConnected())
                mConnection.disconnect();
        }
    }

我也是使用MediaScannerConnection，在4.4上亲测可以实现更新媒体库。构造里的mime可以传null