Volley网络请求框架如何在Android 应用中使用

package com.Android.xiong.gridlayoutTest;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.Bitmap.Config;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.Toast;import com.android.volley.Request.Method;import com.android.volley.RequestQueue;import com.android.volley.Response;import com.android.volley.VolleyError;import com.android.volley.toolbox.ImageRequest;import com.android.volley.toolbox.StringRequest;import com.android.volley.toolbox.Volley;public class NetCacheActivity extends Activity {private static final String URL = "http://sina.com";//请求的urlprivate RequestQueue mRequestQueue;private Button btn_request;private ImageView iv_request;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.main);initView(); mRequestQueue = Volley.newRequestQueue(getApplicationContext());  }private void initView() {// TODO Auto-generated method stubbtn_request = (Button) findViewById(R.id.btn_request);iv_request=(ImageView) findViewById(R.id.iv_request);}public void onClick(View v) {//volleyRequest();从网络上获取图片imageRequest();LoadImageView();//ImageLoader加载图片}private void imageRequest() {// TODO Auto-generated method stub ImageRequest mImageRequest=new ImageRequest("https://file.lsjlt.com/upload/202305/30/k423th2wqmc.jpg", new Response.Listener<Bitmap>() {            //需要的注意的是导入Response.Listener<Bitmap>别导错包！@Overridepublic void onResponse(Bitmap response) {// 将网络请求的图片返回并显示在ImageView中  try {Thread.sleep(3000);//休眠3秒 iv_request.setImageBitmap(response);Toast.makeText(getApplicationContext(), " onResponse", Toast.LENGTH_SHORT).show();Log.d(" onResponse", response.toString());} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}}},0, 0, Config.RGB_565, new Response.ErrorListener() {@Overridepublic void onErrorResponse(VolleyError error) {// 默认加载图片资源iv_request.setImageResource(R.drawable.ic_launcher);Toast.makeText(getApplicationContext(), " onErrorResponse", Toast.LENGTH_SHORT).show();Log.d(" onErrorResponse", error.toString());}}); mRequestQueue.add(mImageRequest);//强图片请求添加到请求队列}public void LoadImageView() {// 利用ImageLoader异步加载图片final ImageLoader mImageLoader = new ImageLoader(mquest,new BitmapCache());ImageListener listener = ImageLoader.getImageListener(iv_request,R.drawable.voice_to_short, R.drawable.ic_launcher);        //get请求方式mImageLoader.get("https://file.lsjlt.com/upload/202305/30/jzzjhkdpeyp.jpg",listener);Log.d("ImageLoader", mImageLoader.toString());}// import com.android.volley.Response.ErrorListener;private void volleyRequest() {StringRequest mRequest = new StringRequest(Method.GET, URL,new Response.Listener<String>() {@Overridepublic void onResponse(String response) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(), "onResponse ",Toast.LENGTH_LONG).show();Log.d("on onResponse", response.toString());//请求成功}}, new Response.ErrorListener() {@Overridepublic void onErrorResponse(VolleyError error) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(),"onErrorResponse", Toast.LENGTH_SHORT).show();Log.d("on ErrorReponse", error.toString());//请求失败}});     mRequestQueue.add(mRequest);     }}