Android Open Source - Dreamer Volley Manager

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License

The source code is released under:

Apache License

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Java Source Code

package com.android.fancyblurdemo.app;
/*from   w ww  .j  a  v  a 2  s  . co  m*/
import android.content.Context;
import android.graphics.Bitmap;

import com.android.fancyblurdemo.volley.RequestQueue;
import com.android.fancyblurdemo.volley.toolbox.ImageLoader;
import com.android.fancyblurdemo.volley.toolbox.Volley;

/**
 * Created by kevin.marlow on 2/21/14.
 */
public class VolleyManager {

    /** Internal instance variable. */
    private static VolleyManager sInstance;

    /** The request queue. */
    private RequestQueue mRequestQueue;

    /**
     * Volley image loader
     */
    private ImageLoader mImageLoader;

    /**
     * Image cache implementation
     */
    private ImageLoader.ImageCache mImageCache;

    private VolleyManager() {
        // no instances
    }

    /**
     * This is the initializer.
     * @param context Your application context.
     * @param cacheSize The size of your image cache.
     */
    public static void init(Context context, int cacheSize) {
        if (sInstance == null) {
            sInstance = new VolleyManager();
            sInstance.mRequestQueue = Volley.newRequestQueue(context);
            sInstance.mImageCache = new BitmapLruImageCache(cacheSize);
            sInstance.mImageLoader = new ImageLoader(VolleyManager.getRequestQueue(), sInstance.mImageCache);
        }
    }

    /**
     * Gets the image loader from the singleton.
     * @return The RequestQueue.
     * @throws IllegalStateException This is thrown if init has not been called.
     */
    public static RequestQueue getRequestQueue() {
        if (sInstance == null) {
            throw new IllegalStateException("The VolleyManager must be initialized.");
        }
        return sInstance.mRequestQueue;
    }

    /**
     * Gets the image loader from the singleton.
     * @return The ImageLoader.
     * @throws IllegalStateException This is thrown if init has not been called.
     */
    public static ImageLoader getImageLoader() {
        if (sInstance == null) {
            throw new IllegalStateException("The VolleyManager must be initialized.");
        }
        return sInstance.mImageLoader;
    }

    /**
     * Gets a bitmap from the cache.
     * @param cacheKey The key used for cache lookup.
     * @return The bitmap.
     */
    public static Bitmap getBitmap(String cacheKey) {
        if (sInstance == null) {
            throw new IllegalStateException("You must call init() first.");
        }
        return sInstance.mImageCache.getBitmap(cacheKey);
    }

    /**
     * Puts a bitmap in the cache.
     * @param cacheKey The key used for cache lookup.
     * @param bitmap The bitmap to cache.
     */
    public static void putBitmap(String cacheKey, Bitmap bitmap) {
        if (sInstance == null) {
            throw new IllegalStateException("You must call init() first.");
        }
        sInstance.mImageCache.putBitmap(cacheKey, bitmap);
    }
}

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