unable to resolve interface method 19822: Lokio/BufferedSource

在Android中使用OkHttp简单加载一个图片，运行时出现了以下多个异常，
然后直接停止运行，请问有没有碰到类似的问题？要怎么解决？感谢！

具体代码如下：

OkHttpClient mOkHttpClient;
private final String imageUrl="

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mOkHttpClient = new OkHttpClient();
    Request mRequest=new Request.Builder().url(imageUrl).build();
    mImageView=(ImageView) findViewById(R.id.imgView);
    Call mCall=mOkHttpClient.newCall(mRequest);
    //请求加入队列
    mCall.enqueue(new Callback() {
        @Override
        public void onFailure(Call call, IOException e) {
            //此处处理请求失败的逻辑
        }

        @Override
        public void onResponse(Call call, Response response) throws IOException {
              //Response代表OkHttp从服务器取得的响应数据包
            if (response.isSuccessful())
                //response.body()是图片的字节数据
            bytes=response.body().bytes();
            //response.body().close();//可选
            final Bitmap bitmap= BitmapFactory.decodeByteArray(bytes,0,bytes.length);
            //回调是运行在非Andorid UI主线程
            //数据请求成功后，切换到Andorid UI主线程中更新
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    //网络图片请求成功，更新到主线程的ImageView
                     mImageView.setImageBitmap(bitmap);
                }
            });


        }
    });
}

@Override
protected void onDestroy() {
    super.onDestroy();
    mOkHttpClient.dispatcher().cancelAll();
}