Method doBind

xutils/src/main/java/org/xutils/image/ImageLoader.java:164–287

(final ImageView view,
                             final String url,
                             final ImageOptions options,
                             final int fileLockedExceptionRetryCount,
                             final Callback.CommonCallback<Drawable> callback)

     */
    /*package*/
    static Cancelable doBind(final ImageView view,
                             final String url,
                             final ImageOptions options,
                             final int fileLockedExceptionRetryCount,
                             final Callback.CommonCallback<Drawable> callback) {

        // check params
        ImageOptions localOptions = options;
        {
            if (view == null) {
                postArgsException(null, localOptions, "view is null", callback);
                return null;
            }

            if (TextUtils.isEmpty(url)) {
                postArgsException(view, localOptions, "url is null", callback);
                return null;
            }

            if (localOptions == null) {
                localOptions = ImageOptions.DEFAULT;
            }
            localOptions.optimizeMaxSize(view);
        }

        // stop the old loader
        MemCacheKey key = new MemCacheKey(url, localOptions);
        Drawable oldDrawable = view.getDrawable();
        if (oldDrawable instanceof AsyncDrawable) {
            ImageLoader loader = ((AsyncDrawable) oldDrawable).getImageLoader();
            if (loader != null && !loader.stopped) {
                if (key.equals(loader.key)) {
                    // repetitive url and options binding to the same View.
                    // not need callback to ui.
                    return null;
                } else {
                    loader.cancel();
                }
            }
        } else if (oldDrawable instanceof ReusableDrawable) {
            MemCacheKey oldKey = ((ReusableDrawable) oldDrawable).getMemCacheKey();
            if (oldKey != null && oldKey.equals(key)) {
                MEM_CACHE.put(key, oldDrawable);
            }
        }

        // load from Memory Cache
        Drawable memDrawable = null;
        if (localOptions.isUseMemCache()) {
            memDrawable = MEM_CACHE.get(key);
            if (memDrawable instanceof BitmapDrawable) {
                Bitmap bitmap = ((BitmapDrawable) memDrawable).getBitmap();
                if (bitmap == null || bitmap.isRecycled()) {
                    memDrawable = null;
                }
            }
        }
        if (memDrawable != null) { // has mem cache