Java E/Volley:com.android.Volley.ParseError:org.json.JSONException
我试图从API网页中读取JSON字符串,但得到错误:类型为org.JSON.JSONObject的jsonexception无法转换为JSONArrayJava E/Volley:com.android.Volley.ParseError:org.json.JSONException,java,android,Java,Android,我试图从API网页中读取JSON字符串,但得到错误:类型为org.JSON.JSONObject的jsonexception无法转换为JSONArray package com.kedaiit.dev.jadwalin; import android.app.ProgressDialog; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.annotation.
package com.kedaiit.dev.jadwalin;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class UpcomingFragment extends Fragment {
private RecyclerView recyclerView;
private LinearLayoutManager linearLayoutManager;
private DividerItemDecoration dividerItemDecoration;
private List<Upcoming> list;
private RecyclerView.Adapter adapter;
private String url = "https://www.thesportsdb.com/api/v1/json/1/eventsnextleague.php?id=4328";
public UpcomingFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_upcoming, container, false);
recyclerView = view.findViewById(R.id.recyclerViewUpcoming);
list = new ArrayList<>();
adapter = new UpcomingAdapter(getContext(), list);
linearLayoutManager = new LinearLayoutManager(getContext());
linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
dividerItemDecoration = new DividerItemDecoration(recyclerView.getContext(), linearLayoutManager.getOrientation());
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(linearLayoutManager);
recyclerView.addItemDecoration(dividerItemDecoration);
recyclerView.setAdapter(adapter);
getData();
return view;
}
private void getData() {
final ProgressDialog progressDialog = new ProgressDialog(getContext());
progressDialog.setMessage("Loading...");
progressDialog.show();
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
for (int i = 0; i < response.length(); i++) {
try {
JSONObject jsonObject = response.getJSONObject(i);
Upcoming obj = new Upcoming();
obj.setIdEvent(jsonObject.getString("idEvent"));
obj.setStrEvent(jsonObject.getString("strEvent"));
obj.setDateEvent(jsonObject.getString("dateEvent"));
list.add(obj);
} catch (JSONException e) {
e.printStackTrace();
progressDialog.dismiss();
}
}
adapter.notifyDataSetChanged();
progressDialog.dismiss();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("Volley", error.toString());
progressDialog.dismiss();
}
});
RequestQueue requestQueue = Volley.newRequestQueue(getContext());
requestQueue.add(jsonArrayRequest);
}
}
package com.kedait.dev.jadwalin;
导入android.app.ProgressDialog;
导入android.os.Bundle;
导入android.support.annotation.NonNull;
导入android.support.annotation.Nullable;
导入android.support.v4.app.Fragment;
导入android.support.v7.widget.DividerItemDecoration;
导入android.support.v7.widget.LinearLayoutManager;
导入android.support.v7.widget.RecyclerView;
导入android.util.Log;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.LinearLayout;
导入com.android.volley.RequestQueue;
导入com.android.volley.Response;
导入com.android.volley.VolleyError;
导入com.android.volley.toolbox.JsonArrayRequest;
导入com.android.volley.toolbox.volley;
导入org.json.JSONArray;
导入org.json.JSONException;
导入org.json.JSONObject;
导入java.util.ArrayList;
导入java.util.List;
公共类UpcomingFragment扩展了片段{
私人回收站;
私人直线酒店经理直线酒店经理;
私人分割分割;
私人名单;
专用循环视图适配器;
专用字符串url=”https://www.thesportsdb.com/api/v1/json/1/eventsnextleague.php?id=4328";
公共UpcomingFragment(){
//必需的空公共构造函数
}
@凌驾
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
视图=充气机。充气(R.layout.fragment\u,container,false);
recyclerView=view.findViewById(R.id.RecyclerViewWupComing);
列表=新的ArrayList();
适配器=新的UpcomingAdapter(getContext(),list);
linearLayoutManager=新的linearLayoutManager(getContext());
linearLayoutManager.setOrientation(linearLayoutManager.VERTICAL);
dividerItemDecoration=新的dividerItemDecoration(recyclerView.getContext(),linearLayoutManager.getOrientation());
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(linearLayoutManager);
回收视图。附加装饰(分割装饰);
recyclerView.setAdapter(适配器);
getData();
返回视图;
}
私有void getData(){
final ProgressDialog ProgressDialog=新建ProgressDialog(getContext());
progressDialog.setMessage(“加载…”);
progressDialog.show();
JsonArrayRequest JsonArrayRequest=newjsonarrayrequest(url,new Response.Listener()){
@凌驾
公共void onResponse(JSONArray响应){
对于(int i=0;i
这个项目让我在logcat中得到它,当我调试它时,它说:E/Volley类型的jsonexception:com.android.Volley.ParseError:org.json.jsonexception:JSONObject和JSONArray之间的区别
Json对象包含在{}eg:{“name”:“Ramu”,“age”:“21”}
Json数组包含在[]eg:[{“name”:“Ramu”,“age”:“21”},{“name”:“Arnav”,“age”:“12”}]
你的案子 您的对象名是
events
,因此需要使用events
as-id从JSONObject获取JSONArray JSONArray JSONArray=response.getJSONArray(“事件”)
然后遍历json对象数组。
for(int i=0;i
传递给Volley请求的参数错误,需要指定url调用的GET或POST方法。检查下面的代码
正确的代码应该是package com.kedait.dev.jadwalin;
导入android.app.ProgressDialog;
导入android.os.Bundle;
导入android.support.annotation.NonNull;
导入android.support.annotation.Nullable;
导入android.support.v4.app.Fragment;
导入android.support.v7.widget.DividerItemDecoration;
导入android.support.v7.widget.LinearLayoutManager;
导入android.support.v7.widget.RecyclerView;
导入android.util.Log;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.LinearLayout;
导入com.android.volley.Request;
导入com.android.volley.RequestQueue;
导入com.android.volley.Response;
导入com.android.volley.VolleyError;
导入com.android.volley.toolbox.JsonArrayRequest;
导入com.android.volley.toolbox.JsonObjectRequest;
导入com.android.volley.toolbox.volley;
导入org.json.JSONArray;
导入org.json.JSONException;
导入org.json.JSONObject;
导入java.util.ArrayList;
导入java.util.Lis
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject Jobj = jsonArray.getJSONObject(i);
\\You can read each object using Jobj now
}
package com.kedaiit.dev.jadwalin;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class UpcomingFragment extends Fragment {
private RecyclerView recyclerView;
private LinearLayoutManager linearLayoutManager;
private DividerItemDecoration dividerItemDecoration;
private List<Upcoming> list;
private RecyclerView.Adapter adapter;
private String url = "https://www.thesportsdb.com/api/v1/json/1/eventsnextleague.php?id=4328";
public UpcomingFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_upcoming, container, false);
recyclerView = view.findViewById(R.id.recyclerViewUpcoming);
list = new ArrayList<>();
adapter = new UpcomingAdapter(getContext(), list);
linearLayoutManager = new LinearLayoutManager(getContext());
linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
dividerItemDecoration = new DividerItemDecoration(recyclerView.getContext(), linearLayoutManager.getOrientation());
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(linearLayoutManager);
recyclerView.addItemDecoration(dividerItemDecoration);
recyclerView.setAdapter(adapter);
getData();
return view;
}
private void getData() {
final ProgressDialog progressDialog = new ProgressDialog(getContext());
progressDialog.setMessage("Loading...");
progressDialog.show();
JsonObjectRequest my_request = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try{
JSONArray jsonArray = response.getJSONArray("events");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject Jobj = jsonArray.getJSONObject(i);
Upcoming obj = new Upcoming();
obj.setIdEvent(Jobj.getString("idEvent"));
obj.setStrEvent(Jobj.getString("strEvent"));
obj.setDateEvent(Jobj.getString("dateEvent"));
list.add(obj);
}
} catch (JSONException e) {
e.printStackTrace();
progressDialog.dismiss();
}
adapter.notifyDataSetChanged();
progressDialog.dismiss();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("Volley", "Error: " + error.getMessage());
progressDialog.dismiss();
}
});
RequestQueue requestQueue = Volley.newRequestQueue(getContext());
requestQueue.add(my_request);
}
}