android - 如何获取默认内容类型 Android Volley

Question

我想知道如何从 volley android 中的标题获取默认内容类型

      @Override
        public Map<String, String> getHeaders() throws AuthFailureError {

            Map<String, String> headers = new HashMap<String, String>();
            headers.put("Authkey", Agent_Name);
            headers.put("apptype", "android");
            headers.put("apptoken", gcmID);
            return headers;
        }

这里我没有提到内容类型，所以如何获取默认内容类型。

Answer 1

   I just append text fields to the body and created the following function to do it in multipart :

  private void buildTextPart(DataOutputStream dataOutputStream, String 
parameterName, String parameterValue) throws IOException {

    dataOutputStream.writeBytes(twoHyphens + boundary + lineEnd);
    dataOutputStream.writeBytes("Content-Disposition: form-data; name=\"");
    dataOutputStream.write(parameterName.getBytes("UTF-8"));
    dataOutputStream.writeBytes(lineEnd);
    dataOutputStream.writeBytes("Content-Type: text/plain; charset=UTF-8" + 
  lineEnd);
    dataOutputStream.writeBytes(lineEnd);
    dataOutputStream.write(parameterValue.getBytes("UTF-8"));
    dataOutputStream.writeBytes(lineEnd)

 }

 here mention multipart data format ,and text format as utf8,its working fine