• • 我 想 从 news Api 获取 数据 ， 但 我 的 日志 猫 显示 错误 E/Volley ：[ 44820 ] 网络 实用 程序 。 应该 重试 异常 ：意外 响应 代码 403 ， 请 告诉 我 此 问题 的 解决 方案 * *

This is a news app whose aim is to fetches data from newsApi.org and puts the image title on the recycler view of TextViews...... but while I m running this app on my android device this app is showing an error in the log and my application is doing noting

• • 主要 活动 代码 * *

package com.example.newsfeeds

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.Toast
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.android.volley.Request
import com.android.volley.Response
import com.android.volley.toolbox.JsonObjectRequest
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {
    lateinit var mAdapter: NewsListAdapter
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val layoutManager = LinearLayoutManager(this)
        recyclerView.layoutManager = layoutManager
        fetchData()
         mAdapter = NewsListAdapter()
        recyclerView.adapter = mAdapter
    }

    private fun fetchData(){
        val url = "https://newsapi.org/v2/top-headlines?sources=bbc-news&apiKey=cedef5f84e094e23a55e8de8120243ba"

        val newsJsonObjectRequest = JsonObjectRequest(
            Request.Method.GET,
            url,
            null,
            Response.Listener {

                val newsJsonArray = it.getJSONArray("articles")
                val newsArray = ArrayList<News>()
                for(i in 0 until  newsJsonArray.length()){
                    val newsJsonObject = newsJsonArray.getJSONObject(i)
                    val news = News(
                        newsJsonObject.getString("author"),
                        newsJsonObject.getString("title"),
                        newsJsonObject.getString("url"),
                        newsJsonObject.getString("imageToUrl")
                    )
                    Toast.makeText(this,"Entered",Toast.LENGTH_LONG).show()
                    newsArray.add(news)
                }
                mAdapter.update(newsArray)

            },Response.ErrorListener {

            }

        )
        val queue = MySingleton.getInstance(this).requestQueue
        queue.add(newsJsonObjectRequest)

    }
}

中 的 每 一 个

• • 适配 器 代码 * *

package com.example.newsfeeds

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.recyclerview.widget.RecyclerView
import kotlinx.android.synthetic.main.single_item_look.view.*

class NewsListAdapter() : RecyclerView.Adapter<NewsViewHolder>() {
  private var  items : ArrayList<News> = ArrayList()
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): NewsViewHolder {
        val view = LayoutInflater.from(parent.context).inflate(R.layout.single_item_look,parent,false)
        return NewsViewHolder(view)
    }

    override fun getItemCount(): Int {
        return items.size
    }

    override fun onBindViewHolder(holder: NewsViewHolder, position: Int) {
        val currentItem = items[position]
        holder.titleView.text = currentItem.title
    }
    fun update(updatedItems : ArrayList<News>){
        items.clear()
        items.addAll(updatedItems)

        notifyDataSetChanged()
    }
}
class NewsViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
    val titleView : TextView = itemView.title

}

格式

• • 我 的 单身 代码 * *

package com.example.newsfeeds

import android.content.Context
import com.android.volley.Request
import com.android.volley.RequestQueue
import com.android.volley.toolbox.ImageLoader
import com.android.volley.toolbox.Volley

class MySingleton constructor(context: Context) {
    companion object {
        @Volatile
        private var INSTANCE: MySingleton? = null
        fun getInstance(context: Context) =
            INSTANCE ?: synchronized(this) {
                INSTANCE ?: MySingleton(context).also {
                    INSTANCE = it
                }
            }
    }

    val requestQueue: RequestQueue by lazy {

        Volley.newRequestQueue(context.applicationContext)
    }
    fun <T> addToRequestQueue(req: Request<T>) {
        requestQueue.add(req)
    }
}

格式

• • 新闻 代码 * *

package com.example.newsfeeds

data class News(val author : String ,
                val title : String,
                val url :String,
                val urlToImage : String)

格式