在学习中注意点：
1、要在AndroidManifest.xml中加入上网允许权限
<uses-permission android:name="android.permission.INTERNET"/>2、适合使用单例设计模式，减少重复代码
MySingleton.java
public class MySingleton {private static MySingleton mInstance;private RequestQueue mRequestQueue;private ImageLoader mImageLoader;private static Context mCtx;@SuppressLint("NewApi")private MySingleton(Context context){mCtx = context;mRequestQueue = getRequestQueue();mImageLoader = new ImageLoader(mRequestQueue,new ImageCache() {private final LruCache<String,Bitmap>cache = new LruCache<String,Bitmap>(20);@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR1)@SuppressLint("NewApi")@Overridepublic void putBitmap(String url, Bitmap bitmap) {cache.put(url, bitmap);}@Overridepublic Bitmap getBitmap(String url) {return cache.get(url);}});}public static synchronized MySingleton getInstance(Context context){if(mInstance == null){mInstance = new MySingleton(context);}return mInstance;}public RequestQueue getRequestQueue(){if(mRequestQueue == null){// getApplicationContext() is key, it keeps you from leaking the// Activity or BroadcastReceiver if someone passes one in.mRequestQueue = Volley.newRequestQueue(mCtx.getApplicationContext());}return mRequestQueue;}public <T> void addToRequestQueue(Request<T> req){getRequestQueue().add(req);}public ImageLoader getImageLoader(){return mImageLoader;}}
官方学习网站：
(经常打不开)
（博主的官方摘录）
分享总结：
（Volley完全解析一~四）
（博主的译文）
%20%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90（codeKK的源码解析）
，风不懂云的漂泊，天不懂雨的落魄，眼不懂泪的懦弱，
