Android 多端口文件体的UTF-8编码

我想在文件发送到FileBody时设置UTF-8编码，就像在StringBuilder中一样。我是这样做的：

restClient.AddEntity("body", new StringBody(body, Charset.forName("UTF-8")));

ContentBody fbody = new FileBody(( File )file, "application/octet-stream","UTF-8");
        restClient.AddEntity("files[]", fbody);

如果我发送不同于UTF-8编码的消息，它会正常工作。但如果我真的喜欢这个：

restClient.AddEntity("body", new StringBody(body, Charset.forName("UTF-8")));

ContentBody fbody = new FileBody(( File )file, "application/octet-stream","UTF-8");
        restClient.AddEntity("files[]", fbody);

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服务器获取的文件名不在UTF-8中。我怎样才能修好它

我通过以下方式简单地解决了这个问题：

MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE,null,Charset.forName("UTF-8"));

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我通过以下参数解决此问题：

entity.addPart("video_title", new StringBody(edtvideo_title.getText().toString(),Charset.forName(HTTP.UTF_8)));