错误JSONException java.lang.String无法转换为JSONArray

Question

我正在尝试编写android studio，该程序从SQLserver获取数据，JSON我将其解析为IIS并使用JSON服务进行访问。但是，当我打开程序时，程序中显示的错误是org.json.JSONException:Value java.net.UnknownHostException of type java.lang.String cannot be converted to JSONArray

我正在使用recycleview来刷新数据，这是我在android studio中的代码。这是我的主要活动

public class MainActivity extends AppCompatActivity {
// CONNECTION_TIMEOUT and READ_TIMEOUT are in milliseconds
public static final int CONNECTION_TIMEOUT = 10000;
public static final int READ_TIMEOUT = 15000;
private RecyclerView recyler_view;
private DataAdapter MyAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    //Make call to AsyncTask
    new AsyncFetch().execute();
}

private class AsyncFetch extends AsyncTask<String, String, String> {
    ProgressDialog pdLoading = new ProgressDialog(MainActivity.this);
    HttpURLConnection conn;
    URL url = null;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();

        //this method will be running on UI thread
        pdLoading.setMessage("\tLoading...");
        pdLoading.setCancelable(false);
        pdLoading.show();

    }
    @Override
    protected String doInBackground(String... params) {
        try {

            // Enter URL address where your json file resides
            // Even you can make call to php file which returns json data
            url = new URL("http://11misd17c0001/JSONWebAPI/Handler1.ashx");       // <- link JSON nantinya

        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return e.toString();
        }
        try {

            // Setup HttpURLConnection class to send and receive data from php and mysql
            conn = (HttpURLConnection) url.openConnection();
            conn.setReadTimeout(READ_TIMEOUT);
            conn.setConnectTimeout(CONNECTION_TIMEOUT);
            conn.setRequestMethod("GET");

            // setDoOutput to true as we recieve data from json file
            conn.setDoOutput(true);

        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
            return e1.toString();
        }

        try {

            int response_code = conn.getResponseCode();

            // Check if successful connection made
            if (response_code == HttpURLConnection.HTTP_OK) {

                // Read data sent from server
                InputStream input = conn.getInputStream();
                BufferedReader reader = new BufferedReader(new InputStreamReader(input));
                StringBuilder result = new StringBuilder();
                String line;

                while ((line = reader.readLine()) != null) {
                    result.append(line);
                }

                // Pass data to onPostExecute method
                return (result.toString());

            } else {

                return ("unsuccessful");
            }

        } catch (IOException e) {
            e.printStackTrace();
            return e.toString();
        } finally {
            conn.disconnect();
        }


    }

    @Override
    protected void onPostExecute(String result) {

        //this method will be running on UI thread

        pdLoading.dismiss();
        List<NewData> data=new ArrayList<>();

        pdLoading.dismiss();
        try {

            JSONArray jArray = new JSONArray(result);

            // Extract data from json and store into ArrayList as class objects
            for(int i=0;i<jArray.length();i++){
                JSONObject json_data = jArray.getJSONObject(i);
                NewData datanew = new NewData();
                datanew.DocumentNo= json_data.getString("doc_no");
                datanew.EmployeeNo= json_data.getString("emp_no");
                datanew.DocumentDate= json_data.getString("doc_date");
                data.add(datanew);
            }

            // Setup and Handover data to recyclerview
            recyler_view = (RecyclerView)findViewById(R.id.recyler_view);
            MyAdapter = new DataAdapter(MainActivity.this, data);
            recyler_view.setAdapter(MyAdapter);
            recyler_view.setLayoutManager(new LinearLayoutManager(MainActivity.this));

        } catch (JSONException e) {
            Toast.makeText(MainActivity.this, e.toString(), Toast.LENGTH_LONG).show();
        }

    }
}}

这是我的DataAdapter类的代码

public class DataAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

private Context context;
private LayoutInflater inflater;
List<NewData> data= Collections.emptyList();
NewData current;
int currentPos=0;

// create constructor to innitilize context and data sent from MainActivity
public DataAdapter(Context context, List<NewData> data){
    this.context=context;
    inflater= LayoutInflater.from(context);
    this.data=data;
}

// Inflate the layout when viewholder created
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view=inflater.inflate(R.layout.display_data, parent,false);
    MyHolder holder=new MyHolder(view);
    return holder;
}

// Bind data
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {

    // Get current position of item in recyclerview to bind data and assign values from list
    MyHolder myHolder= (MyHolder) holder;
    NewData current=data.get(position);
    myHolder.txtdoc.setText(current.DocumentNo);
    myHolder.txtdate.setText(current.EmployeeNo);
    myHolder.txtno.setText(current.DocumentDate);

}

// return total item from List
@Override
public int getItemCount() {
    return data.size();
}


class MyHolder extends RecyclerView.ViewHolder{

    TextView txtdoc;
    TextView txtdate;
    TextView txtno;

    // create constructor to get widget reference
    public MyHolder(View itemView) {
        super(itemView);
        txtdoc = (TextView) itemView.findViewById(R.id.txtdoc);
        txtdate = (TextView) itemView.findViewById(R.id.txtdate);
        txtno = (TextView) itemView.findViewById(R.id.txtno);
    }

}}

这是我的NewData（构造函数）代码

public class NewData {

public String DocumentNo;
public String EmployeeNo;
public String DocumentDate;}

感谢您的帮助..