通过使用OKHTTP获取我的REST FULE SERVICE响应null

Question

我是Android中的新手，我正在获得服务响应null，但服务URL在浏览器中运行正常。当我运行的应用程序屏幕显示空白，没有数据来自我正在做的服务。错误地帮助我。

我的片段：

public class SpecificCountryScholorshipsFragment extends Fragment  {
OKHttpRequest okHttpRequest = new OKHttpRequest();
ArrayList<ScholorshipsModel> arrayList;

ListView                        list
/***********************************************************************************/
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    try {
        String  getResponse = okHttpRequest.doGetRequest("http://192.168.100.7/scholar/web/app.php/scholarship");
        if (getResponse != null) {
             //Toast.makeText(getActivity(), getResponse, Toast.LENGTH_LONG).show();
            JSONArray jArray = new JSONArray(getResponse);
            for (int i = 0; i < jArray.length(); i++) {
                JSONObject jRealObject = jArray.getJSONObject(i);
                ScholorshipsModel model = new ScholorshipsModel();
                model.setScholorship_name(jRealObject.getString("name"));
                model.setScholorship_detail(jRealObject.getString("details"));
                model.setScholorship_pic(jRealObject.getString("picture"));
                arrayList.add(model);
                setAdapterValue();
            }

        }
        View view = inflater.inflate(R.layout.scholorship_listing_main, container, false);
        list = (ListView) view.findViewById(R.id.Scholorshiplist);

        list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Toast.makeText(getActivity(), "List is clicked ", Toast.LENGTH_LONG).show();
                Intent intent = new Intent(getActivity(), ScholorshipDetailActivity.class);
                getActivity().startActivity(intent);
            }
        });
        return view;
    } catch (JSONException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
return null;
}

    /***********************************************************************************/
private void setAdapterValue() {
    ScholorshipAdapter adapter = new ScholorshipAdapter(getActivity(),  R.layout.scholorship_listing, arrayList);
    list.setAdapter(adapter);
}
}

okhttp类：

public class OKHttpRequest {
OkHttpClient client = new OkHttpClient();
public static final MediaType JSON
        = MediaType.parse("application/json; charset=utf-8");

public String doGetRequest(String url) throws IOException {
    try {
        Request request = new Request.Builder()
                .url(url)
                .build();
        Response response = client.newCall(request).execute();
        return response.body().string();
    }
    catch (Exception e){
        e.printStackTrace();
    }
   return null;
}

String doPostRequest(String url, String json) throws IOException {
    RequestBody body = RequestBody.create(JSON, json);
    Request request = new Request.Builder()
            .url(url)
            .post(body)
            .build();
    Response response = client.newCall(request).execute();
    return response.body().string();
}}

Answer 1

首先要检查您的API，我认为您缺少Hader中的某个参数，或者由于IT的响应不是从服务器中出现的。另外，我建议用户为客户端 - 服务器通信

Answer 2

也可以使用REST-CLIENT（添加Chrome ANS Firefox），如果使用httpsurlconnection进行所有工作，则可以帮助您更好。