我是 android 和 volley 新手 我对 JSON 路径感到困惑 花了很多时间调试这段代码，但遗憾的是找不到错误，有人可以帮我找到这段代码中的问题吗？我无法在 Activity 页面上看到数据
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.os.Bundle;
import com.android.volley.AuthFailureError;
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.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.HashMap;
import java.util.Map;
public class dailyshop extends AppCompatActivity {
private RecyclerView mRecycler;
private cardAdapter mCardAdapter;
private ArrayList<carditem> mCardList;
private RequestQueue mRequestQueue;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dailyshop);
mRecycler = findViewById(R.id.recycler_view);
mRecycler.setHasFixedSize(true);
mRecycler.setLayoutManager(new LinearLayoutManager(this));
mCardList = new ArrayList<>();
mRequestQueue = Volley.newRequestQueue(this);
parseJSON();
}
private void parseJSON(){
String url = "https://fortnite-api.theapinetwork.com/store/get";
final JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, url, null,
new Response.Listener<JSONObject>()
{
@Override
public void onResponse(JSONObject response) {
try {
JSONArray jsonArray = response.getJSONArray("data");
for (int i = 0; i < jsonArray.length(); i++){
JSONObject jsonObject = jsonArray.getJSONObject(i);
String itemName = jsonObject.getString("name");
String imageUrl = jsonObject.getString("background");
int vCount = jsonObject.getInt("cost");
mCardList.add(new carditem(imageUrl,itemName,vCount));
}
mCardAdapter = new cardAdapter(dailyshop.this, mCardList);
mRecycler.setAdapter(mCardAdapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
}
){
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
params.put("Authorization", "mycode");
return params;
}
};
mRequestQueue.add(request);
}
}
我尝试在同一个 JSON 子项中使用没有 key 的自定义 API，并且它有效
api json 文件
{
"lastUpdate":1563408000,
"language":"en",
"data":[
{
"itemId":"0ac5766-6f9355e-6575a4e-abaef79",
"lastUpdate":1563408000,
"store":{
"isFeatured":false,
"isRefundable":true,
"cost":"500",
"occurrences":1,
"isNew":true
},
"item":{
"name":"Glitter",
"description":"",
"type":"emote",
"rarity":"rare",
"costmeticId":null,
"images":{
"icon":"https://fortnite-public-files.theapinetwork.com/emote/a7eb82676b96bc1ff2129ee739d70d4a.png",
"featured":null,
"background":"https://fortnite-public-files.theapinetwork.com/image/0ac5766-6f9355e-6575a4e-abaef79.png",
"information":"https://fortnite-public-files.theapinetwork.com/image/0ac5766-6f9355e-6575a4e-abaef79/item.png"
},
"backpack":{
},
"obtained_type":"vbucks",
"ratings":{
"avgStars":4.18,
"totalPoints":614,
"numberVotes":147
}
}
},
{
"itemId":"d2e8284-fb06feb-ea3fbe3-c41fd8b",
"lastUpdate":1563408000,
"store":{
"isFeatured":false,
"isRefundable":true,
"cost":"800",
"occurrences":3,
"isNew":false
},
"item":{
"name":"Star Wand",
"description":null,
"type":"pickaxe",
"rarity":"rare",
"costmeticId":null,
"images":{
"icon":"https://fortnite-public-files.theapinetwork.com/pickaxe/e0907bc2a6058035c5bf96820da6c21f.png",
"featured":null,
"background":"https://fortnite-public-files.theapinetwork.com/image/d2e8284-fb06feb-ea3fbe3-c41fd8b.png",
"information":"https://fortnite-public-files.theapinetwork.com/image/d2e8284-fb06feb-ea3fbe3-c41fd8b/item.png"
},
"backpack":{
},
"obtained_type":"vbucks",
"ratings":{
"avgStars":4.07,
"totalPoints":789,
"numberVotes":194
}
}
},
{
"itemId":"eb00ead-bb56b45-05e52f8-2398d3a",
"lastUpdate":1563408000,
"store":{
"isFeatured":false,
"isRefundable":true,
"cost":"300",
"occurrences":1,
"isNew":true
},
"item":{
"name":"Scanline",
"description":"",
"type":"wrap",
"rarity":"uncommon",
"costmeticId":null,
"images":{
"icon":"https://fortnite-public-files.theapinetwork.com/wrap/5677d39e97ba5bf8d92e25bc520e7cc0.png",
"featured":null,
"background":"https://fortnite-public-files.theapinetwork.com/image/eb00ead-bb56b45-05e52f8-2398d3a.png",
"information":"https://fortnite-public-files.theapinetwork.com/image/eb00ead-bb56b45-05e52f8-2398d3a/item.png"
},
"backpack":{
},
"obtained_type":"vbucks",
"ratings":{
"avgStars":4.82,
"totalPoints":164,
"numberVotes":34
}
}
},
{
"itemId":"a784814-93b4ea3-3c26b6f-631fac7",
"lastUpdate":1563408000,
"store":{
"isFeatured":false,
"isRefundable":true,
"cost":"500",
"occurrences":1,
"isNew":true
}
}
]
}
我需要有关 JSON 路径的帮助以及我的代码是否有问题
最佳答案
试试这个:
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
String credentials = "username" + ":" + "password";
String base64EncodedCredentials = Base64.encodeToString(credentials.getBytes(), Base64.NO_WRAP);
HashMap<String, String> headers = new HashMap<>();
headers.put("Authorization", "Basic " + base64EncodedCredentials);
return headers;
}
关于java - 如何在volley中传递header api key，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/57086199/