我在获取json数据时在logcat中遇到此错误
org.json.JSONException：alberrnews没有值
我也使用Retrofit 2而且我不知道我是否以正确的方式发布了baseurl
JsonArray
{"alberrnews":[{"title":"This is a title","subject":"This is a subject","image":"http:\/\/www.vcvcvc.com\/uploaded44\/33707\/61457017225.jpg"}]}
主要课程
public class alberrClassNews extends Fragment {
private RecyclerView recyclerView;
private List<alberrNewsListContent> alberrNews = new ArrayList<alberrNewsListContent>();
private final String TAG = "Get JSONArray";
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.alberrnewsclass, container, false);
getActivity().setTitle("Main Class");
recyclerView = (RecyclerView) view.findViewById(R.id.alberrNewsList);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
layoutManager.setReverseLayout(true);
layoutManager.setStackFromEnd(true);
final alberrNewsAdapter aNA = new alberrNewsAdapter(getActivity(), alberrNews);
recyclerView.setAdapter(aNA);
final ProgressDialog progressDialog = new ProgressDialog(getActivity());
progressDialog.setMessage("loading");
progressDialog.show();
final Retrofit alberrRetrofit = new Retrofit.Builder()
.baseUrl("http://mm.com/alrass_charties/")
.addConverterFactory(GsonConverterFactory.create()).build();
alberrService service = alberrRetrofit.create(alberrService.class);
Call<JSONObject> call = service.alberrNews();
call.enqueue(new Callback<JSONObject>() {
@Override
public void onResponse(Call<JSONObject> call, Response<JSONObject> response) {
progressDialog.dismiss();
Log.i(TAG, "success");
try {
JSONArray jsonArray = response.body().getJSONArray("alberrnews");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
alberrNewsListContent newsContent = new alberrNewsListContent();
newsContent.setAlberrNewsTitle(jsonObject.getString("title"));
newsContent.setAlberrNewsSubject(jsonObject.getString("subject"));
newsContent.setAlberrNewsImage(jsonObject.getString("image"));
alberrNews.add(newsContent);
}
aNA.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
@Override
public void onFailure(Call<JSONObject> call, Throwable t) {
Log.i(TAG, "Failed");
progressDialog.dismiss();
Toast.makeText(getActivity().getApplicationContext(), "no connection", Toast.LENGTH_SHORT).show();
}
});
return view;
}
}
服务类
public interface alberrService {
@GET("alberr_news.php")
Call <JSONObject> alberrNews();
}
错误
03-09 04:08:43.617 18686-18696/? I/art: Debugger is no longer active
03-09 04:08:43.656 18686-18686/? I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead.
03-09 04:08:43.681 18686-18705/? D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
03-09 04:08:43.712 18686-18686/? D/Atlas: Validating map...
03-09 04:08:43.765 18686-18705/? D/libEGL: loaded /system/lib/egl/libEGL_emulation.so
03-09 04:08:43.766 18686-18705/? D/libEGL: loaded /system/lib/egl/libGLESv1_CM_emulation.so
03-09 04:08:43.771 18686-18705/? D/libEGL: loaded /system/lib/egl/libGLESv2_emulation.so
03-09 04:08:43.812 18686-18705/? I/OpenGLRenderer: Initialized EGL, version 1.4
03-09 04:08:43.857 18686-18705/? D/OpenGLRenderer: Enabling debug mode 0
03-09 04:08:43.890 18686-18705/? W/EGL_emulation: eglSurfaceAttrib not implemented
03-09 04:08:43.890 18686-18705/? W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xf3d0fea0, error=EGL_SUCCESS
03-09 04:08:48.667 18686-18705/com.example.abdulmajeed.alrasscharities W/EGL_emulation: eglSurfaceAttrib not implemented
03-09 04:08:48.667 18686-18705/com.example.abdulmajeed.alrasscharities W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xf3d0eae0, error=EGL_SUCCESS
03-09 04:08:49.164 18686-18686/com.example.abdulmajeed.alrasscharities I/Get JSONArray: success
03-09 04:08:49.165 18686-18686/com.example.abdulmajeed.alrasscharities W/System.err: org.json.JSONException: No value for alberrnews
03-09 04:08:49.165 18686-18686/com.example.abdulmajeed.alrasscharities W/System.err: at org.json.JSONObject.get(JSONObject.java:389)
03-09 04:08:49.165 18686-18686/com.example.abdulmajeed.alrasscharities W/System.err: at org.json.JSONObject.getJSONArray(JSONObject.java:584)
03-09 04:08:49.165 18686-18686/com.example.abdulmajeed.alrasscharities W/System.err: at com.example.abdulmajeed.alrasscharities.alberrClassNews$1.onResponse(alberrClassNews.java:74)
03-09 04:08:49.165 18686-18686/com.example.abdulmajeed.alrasscharities W/System.err: at retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall$1$1.run(ExecutorCallAdapterFactory.java:66)
03-09 04:08:49.165 18686-18686/com.example.abdulmajeed.alrasscharities W/System.err: at android.os.Handler.handleCallback(Handler.java:739)
03-09 04:08:49.165 18686-18686/com.example.abdulmajeed.alrasscharities W/System.err: at android.os.Handler.dispatchMessage(Handler.java:95)
03-09 04:08:49.165 18686-18686/com.example.abdulmajeed.alrasscharities W/System.err: at android.os.Looper.loop(Looper.java:135)
03-09 04:08:49.165 18686-18686/com.example.abdulmajeed.alrasscharities W/System.err: at android.app.ActivityThread.main(ActivityThread.java:5254)
03-09 04:08:49.165 18686-18686/com.example.abdulmajeed.alrasscharities W/System.err: at java.lang.reflect.Method.invoke(Native Method)
03-09 04:08:49.165 18686-18686/com.example.abdulmajeed.alrasscharities W/System.err: at java.lang.reflect.Method.invoke(Method.java:372)
03-09 04:08:49.165 18686-18686/com.example.abdulmajeed.alrasscharities W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
03-09 04:08:49.165 18686-18686/com.example.abdulmajeed.alrasscharities W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
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答案 0 :(得分：0)
试试吧
public interface alberrService {
@Headers({"content-type: application/json"})
@GET("alberr_news.php")
Call <JSONObject> alberrNews();
}