Question

package com.example.murarilal.volley;

import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;

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.StringRequest;
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.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;

public class MainActivity extends AppCompatActivity {
    RequestQueue queue;
    ListView listView;
    List<Hero> heroList;

    private String url="API_KEY";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
         queue= Volley.newRequestQueue(this);
        home();

        listView = (ListView) findViewById(R.id.listView);
        heroList = new ArrayList<>();

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

                Intent intent=new Intent(getApplicationContext(),ArticleActivity.class);
                intent.putExtra("description",url);
                startActivity(intent);
            }
        });
    }

    public void home()
    {
        JsonObjectRequest request =new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {

                try {
                    JSONObject obj = new JSONObject(String.valueOf(response));

                    JSONArray array = obj.getJSONArray("articles");

                    for (int i = 0; i < array.length(); i++) {
                        Hero hero=new Hero( (String) array.getJSONObject(i).get("title"),(String) array.getJSONObject(i).get("urlToImage"));
                        heroList.add(hero);
                    }

                    ListViewAdapter adapter = new ListViewAdapter(heroList, getApplicationContext());
                    listView.setAdapter(adapter);
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        }
                , new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {

            }
        });
        queue.add(request);
    }
}


package com.example.murarilal.volley;

import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class ArticleActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_article);
        String url="https://newsapi.org/v1/articles?source=techcrunch&apiKey=59b308aec9f242fe98b527ab9ba93199";

        WebView webView=(WebView)findViewById(R.id.webView);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.setWebViewClient(new WebViewClient());

        Intent intent=getIntent();
        webView.loadDataWithBaseURL(url,null,intent.getStringExtra("description"),"text/html","UTF-8");
        webView.loadUrl(url);
    }
}

https://newsapi.org/v2/top-headlines?sources=techcrunch&apiKey=d6eaad863cc640a7a6864d18196bea9e

我尝试从上面的网址获取数据，但它会返回意外的401响应代码。我检查了网址，它完全有效，但我的代码给出了这个错误。当模拟器启动时，它显示空白活动

这是日志错误

11-17 16：20：20.804 14350-14350 / com.example.murarilal.volley W / System.err：com.android.volley.AuthFailureError 11-17 16：20：20.804 14350-14350 / com.example.murarilal.volley W / System.err：at com.android.volley.toolbox.BasicNetwork.performRequest（BasicNetwork.java:141） 11-17 16：20：20.804 14350-14350 / com.example.murarilal.volley W / System.err：at com.android.volley.NetworkDispatcher.run（NetworkDispatcher.java:105）

Answer 1

尝试使用URLConnection而不是凌空。 401表示未授权访问给定URL

Answer 2

我用volley尝试了api V1和V2并获得了状态代码200，并且数据与从浏览器发出请求时显示的数据相匹配。

要求帮助您可以添加日志并在此处发布

Ingredient.ordered_objects.all()

Answer 3

您是否尝试在Gradle文件中添加此行。

我已经实现了你的代码，数据被正确调用。

 compile 'com.mcxiaoke.volley:library-aar:1.0.0'

Answer 4

javax.faces.partial.execute

URL的意外响应代码401

4 个答案: