import android.content.Context;import android.graphics.Bitmap;import android.util.LruCache;import com.android.volley.Request;import com.android.volley.RequestQueue;import com.android.volley.toolbox.ImageLoader;import com.android.volley.toolbox.Volley;/** * Created by YZJ on 2016/8/26. */public class VolleySingleton {    private static VolleySingleton volleySingleton;    private RequestQueue mRequestQueue;    private ImageLoader mImageLoader;    private Context mContext;    public VolleySingleton(Context context) {        this.mContext = context;        mRequestQueue = getRequestQueue();        mImageLoader = new ImageLoader(mRequestQueue,                new ImageLoader.ImageCache(){                    private final LruCache<String,Bitmap> cache = new LruCache<String ,Bitmap>(20);                    @Override                    public Bitmap getBitmap(String url){                        return cache.get(url);                    }                    @Override                    public void putBitmap(String url,Bitmap bitmap){                        cache.put(url,bitmap);                    }                });    }    public static synchronized VolleySingleton getVolleySingleton(Context context){        if(volleySingleton == null){            volleySingleton = new VolleySingleton(context);        }        return volleySingleton;    }    public RequestQueue getRequestQueue(){        if(mRequestQueue == null){            mRequestQueue = Volley.newRequestQueue(mContext.getApplicationContext());        }        return mRequestQueue;    }    public <T> void addToRequestQueue(Request<T> req){        getRequestQueue().add(req);    }    public ImageLoader getImageLoader() {        return mImageLoader;    }}