Created
October 6, 2014 15:52
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Volley Singleton Class for Application Globally
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public class AppController extends Application { | |
public static final String TAG = AppController.class | |
.getSimpleName(); | |
private RequestQueue mRequestQueue; | |
private ImageLoader mImageLoader; | |
private static AppController mInstance; | |
@Override | |
public void onCreate() { | |
super.onCreate(); | |
mInstance = this; | |
} | |
public static synchronized AppController getInstance() { | |
return mInstance; | |
} | |
public RequestQueue getRequestQueue() { | |
if (mRequestQueue == null) { | |
mRequestQueue = Volley.newRequestQueue(getApplicationContext()); | |
} | |
return mRequestQueue; | |
} | |
public ImageLoader getImageLoader() { | |
getRequestQueue(); | |
if (mImageLoader == null) { | |
mImageLoader = new ImageLoader(this.mRequestQueue, | |
new LruBitmapCache()); | |
} | |
return this.mImageLoader; | |
} | |
public <T> void addToRequestQueue(Request<T> req, String tag) { | |
// set the default tag if tag is empty | |
req.setTag(TextUtils.isEmpty(tag) ? TAG : tag); | |
getRequestQueue().add(req); | |
} | |
public <T> void addToRequestQueue(Request<T> req) { | |
req.setTag(TAG); | |
getRequestQueue().add(req); | |
} | |
public void cancelPendingRequests(Object tag) { | |
if (mRequestQueue != null) { | |
mRequestQueue.cancelAll(tag); | |
} | |
}} |
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public class LruBitmapCache extends LruCache<String, Bitmap> implements ImageLoader.ImageCache { | |
public static int getDefaultLruCacheSize() { | |
final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024); | |
final int cacheSize = maxMemory / 8; | |
return cacheSize; | |
} | |
public LruBitmapCache() { | |
this(getDefaultLruCacheSize()); | |
} | |
public LruBitmapCache(int sizeInKiloBytes) { | |
super(sizeInKiloBytes); | |
} | |
@Override | |
protected int sizeOf(String key, Bitmap value) { | |
return value.getRowBytes() * value.getHeight() / 1024; | |
} | |
@Override | |
public Bitmap getBitmap(String url) { | |
return get(url); | |
} | |
@Override | |
public void putBitmap(String url, Bitmap bitmap) { | |
put(url, bitmap); | |
} | |
} |
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