PokeAPI没有回应

Question

我试图从我的Pokedex应用程序中的Pokeapi中获取JSONObject，但似乎没有响应，并且产生了排队错误。然而，该链接在我的浏览器中打开完全正常，显示JSON。我尝试了不同的链接到JSON，它仍然不工作。使用互联网的权限被添加到AndroidManifest中。请求被添加到RequestQueue中。问题可能出在哪里？

这是我的PokedexAdapter类。

package com.example.pokedex;

import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

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.List;

public class PokedexAdapter extends RecyclerView.Adapter<PokedexAdapter.PokedexViewHolder> {
    public static class PokedexViewHolder extends RecyclerView.ViewHolder {
        public LinearLayout containerView;
        public TextView textView;

        PokedexViewHolder(View view) {
            super(view);

            containerView = view.findViewById(R.id.pokedex_row);
            textView = view.findViewById(R.id.pokedex_row_text_view);

            containerView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Pokemon current = (Pokemon) containerView.getTag();
                    Intent intent = new Intent(v.getContext(), PokemonActivity.class);
                    intent.putExtra("name", current.getName());
                    //intent.putExtra("number", current.getNumber());

                    v.getContext().startActivity(intent);
                }
            });
        }
    }

    private List<Pokemon> pokemon = new ArrayList<>();
    private RequestQueue requestQueue;

    public PokedexAdapter(Context context) {
        requestQueue = Volley.newRequestQueue(context);
        loadPokemon();
    }

    public void loadPokemon() {
        String url = "https://pokeapi.co/api/v2/pokemon?limit=151";
        JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, url, null,
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {
                        try {
                            JSONArray results = response.getJSONArray("results");
                            for (int i = 0; i < results.length(); i++) {
                                JSONObject result = results.getJSONObject(i);
                                pokemon.add(new Pokemon(
                                        result.getString("name"),
                                        result.getString("url")));
                            }

                            notifyDataSetChanged();
                        } catch (JSONException e) {
                            Log.e("cs50", "onResponse: ", e);
                        }
                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Log.d("cs50", "onErrorResponse: pokemon list error");
            }
        });
        requestQueue.add(request);
    }

    @NonNull
    @Override
    public PokedexViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.pokedex_row, parent, false);
        return new PokedexViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull PokedexViewHolder holder, int position) {
        Pokemon current = pokemon.get(position);
        holder.textView.setText(current.getName());
        holder.containerView.setTag(current);
    }

    @Override
    public int getItemCount() {
        return pokemon.size();
    }
}

AndroidManifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.pokedex">    
    <uses-permission android:name="android.permission.INTERNET"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".PokemonActivity"></activity>
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

结果--屏幕上什么都没有显示，产生了这个错误。

2020-06-09 19:09:37.469 15137-15137com.example.pokedex Dcs50: onErrorResponse: pokemon list error（错误）。

Answer 1

通过重新安装应用程序解决了这个问题。

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