Examples with ErrorListener com.android.volley.Response.ErrorListener used on opensource projects

Example 1 with ErrorListener

use of com.android.volley.Response.ErrorListener in project iosched by google.

the class ImageLoader method get.

/**
     * Issues a bitmap request with the given URL if that image is not available
     * in the cache, and returns a bitmap container that contains all of the data
     * relating to the request (as well as the default image if the requested
     * image is not available).
     * @param requestUrl The url of the remote image
     * @param imageListener The listener to call when the remote image is loaded
     * @param maxWidth The maximum width of the returned image.
     * @param maxHeight The maximum height of the returned image.
     * @return A container object that contains all of the properties of the request, as well as
     *     the currently available image (default if remote is not loaded).
     */
public ImageContainer get(String requestUrl, ImageListener imageListener, int maxWidth, int maxHeight) {
    // only fulfill requests that were initiated from the main thread.
    throwIfNotOnMainThread();
    final String cacheKey = getCacheKey(requestUrl, maxWidth, maxHeight);
    // Try to look up the request in the cache of remote images.
    Bitmap cachedBitmap = mCache.getBitmap(cacheKey);
    if (cachedBitmap != null) {
        // Return the cached bitmap.
        ImageContainer container = new ImageContainer(cachedBitmap, requestUrl, null, null);
        imageListener.onResponse(container, true);
        return container;
    }
    // The bitmap did not exist in the cache, fetch it!
    ImageContainer imageContainer = new ImageContainer(null, requestUrl, cacheKey, imageListener);
    // Update the caller to let them know that they should use the default bitmap.
    imageListener.onResponse(imageContainer, true);
    // Check to see if a request is already in-flight.
    BatchedImageRequest request = mInFlightRequests.get(cacheKey);
    if (request != null) {
        // If it is, add this request to the list of listeners.
        request.addContainer(imageContainer);
        return imageContainer;
    }
    // The request is not already in flight. Send the new request to the network and
    // track it.
    Request<?> newRequest = new ImageRequest(requestUrl, new Listener<Bitmap>() {

        @Override
        public void onResponse(Bitmap response) {
            onGetImageSuccess(cacheKey, response);
        }
    }, maxWidth, maxHeight, Config.RGB_565, new ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError error) {
            onGetImageError(cacheKey, error);
        }
    });
    mRequestQueue.add(newRequest);
    mInFlightRequests.put(cacheKey, new BatchedImageRequest(newRequest, imageContainer));
    return imageContainer;
}