compile 'com.mcxiaoke.volley:library:1.0.19'

RequestQueue queue=Volley.newRequestQueue(context);

String url = "http://www.baidu.com";
StringRequest request = new StringRequest(Request.Method.GET,url,new Response.Listener<String>(){
@Override
public void onResponse(String response) {result = SecuritUtil.aesBase64Decode(response); },new ErrorListener() { @Override public void onErrorResponse(VolleyError error) { } }
}); 

queue.add(request);

/**
  * Creates a new request with the given method.
  *
  * @param method the request {@link Method} to use
  * @param url URL to fetch the string at
  * @param listener Listener to receive the String response
  * @param errorListener Error listener, or null to ignore errors
  */
 public StringRequest(int method, String url, Listener<String> listener,
   ErrorListener errorListener) {
  super(method, url, errorListener);
  mListener = listener;
 }

StringRequest request = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
   @Override
   public void onResponse(String response) {
　　　　　　　　//成功后
   }
  }, new Response.ErrorListener() {
   @Override
   public void onErrorResponse(VolleyError error) {
　　　　　　　　//失敗后
   }
  }) {//傳值方法書寫位置
   @Override
   protected Map<String, String> getParams() throws AuthFailureError {
    HashMap<String, String> map = new HashMap<>();
    map.put("name", "liu");
    map.put("id", "123456789");
    return map;
   }
  };//這里需要注意的是getParams（）方法是寫在StringRequest(內)的，括號標紅。

queue.add(request);

/**
  * Creates a new request.
  * @param method the HTTP method to use
  * @param url URL to fetch the JSON from
  * @param requestBody A {@link String} to post with the request. Null is allowed and
  * indicates no parameters will be posted along with request.
  * @param listener Listener to receive the JSON response
  * @param errorListener Error listener, or null to ignore errors.
  */
 public JsonObjectRequest(int method, String url, String requestBody,
        Listener<JSONObject> listener, ErrorListener errorListener) {
  super(method, url, requestBody, listener,
    errorListener);
 }

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

     }
    },
    new Response.ErrorListener() {
     @Override
     public void onErrorResponse(VolleyError error) {

     }
    });

JSONObject jsonO=new JSONObject();
  try {
   jsonO.put("name","");
   jsonO.put("ID","");
   
  } catch (JSONException e) {
   e.printStackTrace();
  }//創(chuàng)建JSONObject對象
  JsonObjectRequest json=new JsonObjectRequest(Request.Method.POST, url, jsonO,
    new Response.Listener<JSONObject>() {
     @Override
     public void onResponse(JSONObject response) {
　　　　　　　　　　　　//ok
     }
    },
    new Response.ErrorListener() {
     @Override
     public void onErrorResponse(VolleyError error) {
　　　　　　　　　　　　//error
     }
    });

queue.add(request);

/**
  * Creates a new image request, decoding to a maximum specified width and
  * height. If both width and height are zero, the image will be decoded to
  * its natural size. If one of the two is nonzero, that dimension will be
  * clamped and the other one will be set to preserve the image's aspect
  * ratio. If both width and height are nonzero, the image will be decoded to
  * be fit in the rectangle of dimensions width x height while keeping its
  * aspect ratio.
  *
  * @param url URL of the image
  * @param listener Listener to receive the decoded bitmap
  * @param maxWidth Maximum width to decode this bitmap to, or zero for none
  * @param maxHeight Maximum height to decode this bitmap to, or zero for
  *   none
  * @param scaleType The ImageViews ScaleType used to calculate the needed image size.
  * @param decodeConfig Format to decode the bitmap to
  * @param errorListener Error listener, or null to ignore errors
  */
 public ImageRequest(String url, Response.Listener<Bitmap> listener, int maxWidth, int maxHeight,
   ScaleType scaleType, Config decodeConfig, Response.ErrorListener errorListener) {
  super(Method.GET, url, errorListener); 
  setRetryPolicy(
    new DefaultRetryPolicy(IMAGE_TIMEOUT_MS, IMAGE_MAX_RETRIES, IMAGE_BACKOFF_MULT));
  mListener = listener;
  mDecodeConfig = decodeConfig;
  mMaxWidth = maxWidth;
  mMaxHeight = maxHeight;
  mScaleType = scaleType;
 }

ImageRequest request =new ImageRequest(url,Response.Listener<Bitmap>(){
 @Override
    public void onResponse(Bitmap s) {
 
     Log.i("aa", "post請求成功" + s);
     
    }
   } ,0,0,Bitmap.config.RGB_565,new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError volleyError) {
　　　　　　　　　　Log.i("aa", "post請求失敗" + s);});

ImageLoader imageLoader = new ImageLoader(requestQueue, new ImageLoader.ImageCache() {
   @Override
   public Bitmap getBitmap(String url) {
   //具體操作，主要針對對緩存數(shù)據大小、如何緩存。

    return null;
   }

   @Override
   public void putBitmap(String url, Bitmap bitmap) {

   }
  });
//imgShow是imageview控件。后面參數(shù)分類是失敗和過程時出現(xiàn)的圖片
  ImageLoader.ImageListener listener = ImageLoader.getImageListener(imgShow, R.mipmap.ic_launcher, R.drawable.btn_add_true);
  imageLoader.get(url, listener, 200, 200);

public class ImageCache implements ImageLoader.ImageCache{
//LruCache 是專門用于緩存的類，String可以作為緩存入后的名稱，Bitmap是位圖。
 public LruCache<String,Bitmap> lruCache;
 public int maxCache=10 * 1024 *1024;//最大緩存大小 10M
 public ImageCache (){
  lruCache=new LruCache<>(maxCache);//實例化創(chuàng)建
 }
 @Override
 public Bitmap getBitmap(String url) {//得到位圖
  return lruCache.get(url);
 }

 @Override
 public void putBitmap(String url, Bitmap bitmap) {//存入位圖
  lruCache.put(url,bitmap);
 }
}

netimg = (NetworkImageView) findViewById(R.id.id_net_img);
netimg.setErrorImageResId(R.mipmap.ic_launcher);//錯誤后
netimg.setDefaultImageResId(R.drawable.btn_add_true);//加載中默認
//這里new ImageCache()是上面自己寫的類
netimg.setImageUrl(url,new ImageLoader(queue,new ImageCache()));