Android Json对象无法转换为jsonarray

在我的代码中，我需要使用JSON在文本视图中显示普通文本。我正在使用volley库解析JSON。我的代码是

public class PrincipalSpeechFragment extends Fragment implements OnClickListener {

public PrincipalSpeechFragment(){}

private String urlJsonArry = "http://imaginetventures.net/sample/everwin_vidhyashram/webservice/rest/?module=speech&from=1-9-2014&to=30-9-2014";

private static String TAG = PrincipalSpeechFragment.class.getSimpleName();

// JSON Node names
private static final String TAG_PRINCIPAL_SPEECH ="Principal Speech";
private static final String TAG_SPEECH= "speech";
private static final String TAG_DESC = "desc";

String tag_json_obj = "json_obj_req";

private Button getPrincipalSpeech;

// Progress dialog
//private ProgressDialog pDialog;

private TextView txtResponse;

// temporary string to show the parsed response
private String jsonResponse;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.fragment_principal_speech, container, false);

    return rootView;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);

    getPrincipalSpeech = (Button) getActivity().findViewById(R.id.idForPrinciSpeech);

    txtResponse = (TextView) getActivity().findViewById(R.id.txtResponse);

    getPrincipalSpeech.setOnClickListener(this);
}

@Override
public void onClick(View arg0) {
    // TODO Auto-generated method stub
    makeJsonArrayRequest();
}

private void makeJsonArrayRequest() {

    JsonArrayRequest req = new JsonArrayRequest(urlJsonArry,
            new Response.Listener<JSONArray>() {
        @Override
        public void onResponse(JSONArray response) {
            Log.d(TAG, response.toString());

            try {
                // Parsing json array response
                // loop through each json object
                jsonResponse = "";
                for (int i = 0; i < response.length(); i++) {

                    JSONObject speechobj = (JSONObject) response
                            .get(i);

                    /*String speech = speechobj.getString("speech");
                    String email = speech.getString("email");
                    JSONObject phone = speech
                            .getJSONObject("speech");
                    String home = phone.getString("home");
                    String mobile = phone.getString("mobile");*/

                    /*jsonResponse += "Speech: " + speech + "\n\n";
                    /*jsonResponse += "Email: " + email + "\n\n";*/
                    /*jsonResponse += "Home: " + home + "\n\n";
                    jsonResponse += "Mobile: " + mobile + "\n\n\n";*/

                }

                txtResponse.setText(jsonResponse);

            } catch (JSONException e) {
                e.printStackTrace();
                Toast.makeText(getActivity().getApplicationContext(),
                        "Error: " + e.getMessage(),
                        Toast.LENGTH_LONG).show();
            }

            //hidepDialog();
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            VolleyLog.d(TAG, "Error: " + error.getMessage());
            Toast.makeText(getActivity().getApplicationContext(),
                    error.getMessage(), Toast.LENGTH_SHORT).show();
            //hidepDialog();
        }
    });

    // Adding request to request queue
    AppController.getInstance().addToRequestQueue(req);
}
}

当我点击按钮获得结果时，它只是显示org.json.json.EXCEPTION。和值：--Json对象无法转换为jsonarray

我不知道我犯了什么错误。我只是在吐司中发现了这些错误。 请告诉我

private String urlJsonArry = "http://imaginetventures.net/sample/everwin_vidhyashram/webservice/rest/?module=speech&from=1-9-2014&to=30-9-2014";

您正在请求代码中指定的url，如果我将其粘贴到浏览器中：

答复：

{
    "Principal Speech": [
        {
            "speech": "Lorem (... et cetera)."
        }
    ]
}

这是一个JSONObject，不是JSONArray。因此，您可以将代码中的JSONArray设置为JSONObject，然后提取您可能需要的JSONArray:JSONObject.getJSONArrayPrincipal Speech

编辑：添加代码

private void makeJSONObjectRequest() { 

    JsonObjectRequest req = new JsonObjectRequest(urlJsonArry, //Dont know where that came from, but JsonArrayRequest as classname will probably still work. Custom/your own class, I guess. As long as the type JSONArray is changed to JSONObject
            new Response.Listener<JSONObject>() { //JSONObject instead of JSONArray
        @Override
        public void onResponse(JSONObject response) {//JSONObject instead of JSONArray
            JSONArray speechArray = response.getJSONArray("Principal Speech"); //get the array from the JSONObject
            Log.d(TAG, response.toString());
            // The rest is the same
            try {
                // Parsing json array response
                // loop through each json object
                jsonResponse = "";
                for (int i = 0; i < response.length(); i++) {

                    JSONObject speechobj = (JSONObject) response
                            .get(i);

                    /*String speech = speechobj.getString("speech");
                    String email = speech.getString("email");
                    JSONObject phone = speech
                            .getJSONObject("speech");
                    String home = phone.getString("home");
                    String mobile = phone.getString("mobile");*/

                    /*jsonResponse += "Speech: " + speech + "\n\n";
                    /*jsonResponse += "Email: " + email + "\n\n";*/
                    /*jsonResponse += "Home: " + home + "\n\n";
                    jsonResponse += "Mobile: " + mobile + "\n\n\n";*/

                }

                txtResponse.setText(jsonResponse);

            } catch (JSONException e) {
                e.printStackTrace();
                Toast.makeText(getActivity().getApplicationContext(),
                        "Error: " + e.getMessage(),
                        Toast.LENGTH_LONG).show();
            }

            //hidepDialog();
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            VolleyLog.d(TAG, "Error: " + error.getMessage());
            Toast.makeText(getActivity().getApplicationContext(),
                    error.getMessage(), Toast.LENGTH_SHORT).show();
            //hidepDialog();
        }
    });

    // Adding request to request queue
    AppController.getInstance().addToRequestQueue(req);
}

---

在您的回复中，您得到了JSONObject，所以请使用下面的代码

JSONObject jsnobject = new JSONObject(response);

之后

JSONArray jsonArray = jsnobject.getJSONArray("Principal Speech");
    for (int i = 0; i < jsonArray.length(); i++) {
        JSONObject explrObject = jsonArray.getJSONObject(i);
}

编辑2：

我检查了源代码，如下所示

 public JsonArrayRequest(String url, Listener<JSONArray> listener, ErrorListener errorListener) {
            super(Method.GET, url, null, listener, errorListener);

        }

---

Log.dTAG、response.toString；的值是多少；？JSONObject可以嵌套其他JSONObject和JSONArray。。。查找导致异常的句子，并调用attr.getjsonarrayatr对其进行转换；我需要打印演讲内容，怎么做。你能编辑我的代码吗？@sanjayAD那么我需要jsonarrayRequestSource的源代码；非常感谢兄弟。你的回答对我很有帮助。但是在JSONObject speechobj=JSONObject response.geti中；get显示错误。不知道为什么。我还想完全学习截击。“你能给我推荐一些图坦卡蒙吗？”桑贾亚德，对不起，我的错。该行应该是JSONObject speechobj=JSONObjectspeechArray.geti；或者speechArray.getJSONObjecti；。使用edit2中的代码

JSONArray jsonArray = jsnobject.getJSONArray("Principal Speech");
    for (int i = 0; i < jsonArray.length(); i++) {
        JSONObject explrObject = jsonArray.getJSONObject(i);
}

Response.Listener<JSONArray> listener = new Response.Listener<JSONArray>()
        {
            @Override
            public void onResponse(JSONArray response) {
                // TODO Auto-generated method stub

            }
        };
        Response.ErrorListener errorListener = new Response.ErrorListener()
        {
            @Override
            public void onErrorResponse(VolleyError error) {
                // TODO Auto-generated method stub

            }
        };

   JsonArrayRequest  jr =new JsonArrayRequest(Request.Method.GET,url, listener, errorListener) ;

 public JsonArrayRequest(String url, Listener<JSONArray> listener, ErrorListener errorListener) {
            super(Method.GET, url, null, listener, errorListener);

        }