java.lang.String 类型的值 < 在 Android 中无法转换为 JSONArray

Question

我正在尝试将图像上传到三星 j7 相机中。我得到一些带有</div> 标签的服务器响应。

如何解决此错误以及从响应中获取图像的方法是什么？

错误图像表单 Android 服务器响应

我的代码

• 受保护的无效 Upload_Server() { // TODO 自动生成的方法存根 字符串 urlServer = null; System.out.println("调用后进度"); 试试{

      Log.e("Image Upload", "Inside Upload");
  
      HttpURLConnection connection = null;
      DataOutputStream outputStream = null;
      DataInputStream inputStream = null;
  
      String pathToOurFile = imagepath;
      //   String pathToOurFile1 = imagepathcam;
  
      System.out.println("Before Image Upload" + imagepath);
      if(Videoboolean){
          urlServer = Constants.IMAGEVIDEOURL+"videopostUpload/";
      }else {
          urlServer = Constants.IMAGEVIDEOURL+"imagepostUpload/";
      }
  
      System.out.println("URL SETVER" + urlServer);
      System.out.println("After Image Upload" + imagepath);
      String lineEnd = "\r\n";
      String twoHyphens = "--";
      String boundary =  "*****";
  
      int bytesRead, bytesAvailable, bufferSize;
      byte[] buffer;
      int maxBufferSize = 1*1024*1024;
      System.out.println("enter the file path in android"+pathToOurFile);
      FileInputStream fileInputStream = new FileInputStream(new File(pathToOurFile));
      //  FileInputStream fileInputStream1 = new FileInputStream(new File(pathToOurFile1));
  
      URL url = new URL(urlServer);
      connection = (HttpURLConnection) url.openConnection();
      System.out.println("URL is "+url);
      System.out.println("connection is "+connection);
      // Allow Inputs & Outputs
      connection.setDoInput(true);
      connection.setDoOutput(true);
      connection.setUseCaches(false);
  
      // Enable POST method
      connection.setRequestMethod("POST");
  
      connection.setRequestProperty("Connection", "Keep-Alive");
      connection.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);
  
      outputStream = new DataOutputStream( connection.getOutputStream() );
      outputStream.writeBytes(twoHyphens + boundary + lineEnd);
      outputStream.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + pathToOurFile +"\"" + lineEnd);
      outputStream.writeBytes(lineEnd);
      System.out.println("enter the image upload response"+outputStream.getClass().getCanonicalName());
      bytesAvailable = fileInputStream.available();
      bufferSize = Math.min(bytesAvailable, maxBufferSize);
      buffer = new byte[bufferSize];
  
      // Read file
      bytesRead = fileInputStream.read(buffer, 0, bufferSize);
  
      while (bytesRead > 0)
      {
          outputStream.write(buffer, 0, bufferSize);
          bytesAvailable = fileInputStream.available();
          bufferSize = Math.min(bytesAvailable, maxBufferSize);
          bytesRead = fileInputStream.read(buffer, 0, bufferSize);
      }
  
      outputStream.writeBytes(lineEnd);
      outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
  
      // Responses from the server (code and message)
      int serverResponseCode = connection.getResponseCode();
      String serverResponseMessage = connection.getResponseMessage();
  
  
      System.out.println("image"+serverResponseMessage);
  
      fileInputStream.close();
      outputStream.flush();
      outputStream.close();
  
      DataInputStream inputStream1 = null;
      inputStream1 = new DataInputStream (connection.getInputStream());
      String str="";
      String Str1_imageurl="";
  
      while ((  str = inputStream1.readLine()) != null)
      {
          Log.e("Debug","Server Response "+str);
  
          Str1_imageurl = str;
          Log.e("Debug","Server Response String imageurl"+str);
      }
      inputStream1.close();
      System.out.println("image url"+Str1_imageurl);
  
      PostImVD = Str1_imageurl.trim();
      JSONArray array = new JSONArray(PostImVD);
      JSONObject jsonObj = array.getJSONObject(0);
      if(Videoboolean){
          ImageVideo = jsonObj.optString("video_name");
      }else {
          ImageVideo = jsonObj.optString("image_name");
      }
      System.out.println("Profile Picture Path" + PostImVD);
      System.out.println("Profile Picture Path" + ImageVideo);
  }
  
  catch(Exception e){
  
      e.printStackTrace();
  
  }
  

  };

  1:Error Image Form Android Server Response

Answer 1

首先，尝试在此页面中验证您的 JSON 响应，例如：

https://jsonlint.com/

如果您的 JSON 正确，则确定是数组还是对象，取决于使用正确的解析：

如果是数组：

 JSONArray array = new JSONArray(your_string_json);

如果它是一个对象

 JSONObject object = new JSONObject(your_string_json);