CommonDraweeView.java 文件源码

/***
 * load net work image.
 * @param url the main url of image, from net
 * @param lowUrl the low url, from net or local image file name, can be null.
 * @param placeHolder the place holder. 0 with no place holder
 * @param errorResId error res id , 0 with no error res.
 * @param width the width you want
 * @param height the height you want
 * @param scaleType scale type
 * @param l BaseControllerListener,can be null
 */
public void loadImage(String url, String lowUrl,int placeHolder, int errorResId,
                      ScalingUtils.ScaleType scaleType, int width , int height ,
                      final BaseControllerListener<ImageInfo> l){
    ImageRequest request = ImageRequestBuilder
            .newBuilderWithSource(Uri.parse(url))
            //.setLowestPermittedRequestLevel(ImageRequest.RequestLevel.FULL_FETCH)
            .setResizeOptions(new ResizeOptions(width, height))
            .build();
    getHierarchy().setActualImageScaleType(scaleType);
    if(placeHolder!=0) {
        getHierarchy().setPlaceholderImage(getResources().getDrawable( placeHolder ),scaleType);
    }
    if(errorResId!=0){
        getHierarchy().setFailureImage(getResources().getDrawable( errorResId ),scaleType);
    }
    PipelineDraweeControllerBuilder controller = Fresco.newDraweeControllerBuilder()
            .setControllerListener(l)
            .setImageRequest(request)
            .setOldController(getController());
    if(lowUrl!=null){
        Uri lowUri = lowUrl.startsWith("http") ? Uri.parse(lowUrl) : Uri.fromFile(new File(lowUrl));
        controller.setLowResImageRequest(ImageRequestBuilder.newBuilderWithSource(lowUri)
                .setResizeOptions(new ResizeOptions(width, height))
                .build() );
    }
    setController(controller.build());
}