Glide VS Fresco

Fresco

监听下载事件

定义一个ControllerListener，继承自BaseControllerListener。

ControllerListener controllerListener = new BaseControllerListener<ImageInfo>() {
            @Override
            public void onFinalImageSet(String id, @Nullable ImageInfo imageInfo, @Nullable Animatable animatable) {
                super.onFinalImageSet(id, imageInfo, animatable);
                if (animatable instanceof AnimatedDrawable2) {
                    AnimatedDrawable2 animatedDrawable = (AnimatedDrawable2) animatable;
                    //获取动图的长度
                    long loopDurationMs = animatedDrawable.getLoopDurationMs();
                    //设置循环次数
                    animatedDrawable.setAnimationBackend(new LoopCountModifyingBackend(animatedDrawable.getAnimationBackend(), 1));
                }
            }

            // 如果允许呈现渐进式JPEG，同时图片也是渐进式图片，onIntermediateImageSet会在每个扫描被解码后回调。
            @Override
            public void onIntermediateImageSet(String id, @Nullable ImageInfo imageInfo) {
                Log.d(TAG, "Intermediate image received");
            }


            @Override
            public void onFailure(String id, Throwable throwable) {
                super.onFailure(id, throwable);
            }
        };
Uri uri = Uri.fromFile(localFile);
DraweeController controller = Fresco.newDraweeControllerBuilder()
        .setControllerListener(controllerListener)
        .setUri(uri)
        .build();
mSimpleDraweeView.setController(controller);

Android 无法绘制长或宽大于2048像素的图片。这是由OpenGL渲染系统限制的，如果它超过了这个界限，Fresco会对它进行Resize。

修改图片

//修改图片
BasePostprocessor postProcessor = new BasePostprocessor() {

            @Override
            public String getName() {
                return "CustomPostProcessor";
            }

            @Override
            public void process(Bitmap bitmap) {
                for (int x = 0; x < bitmap.getWidth(); x += 2) {
                    for (int y = 0; y < bitmap.getHeight(); y += 2) {
                        bitmap.setPixel(x, y, Color.RED);
                    }
                }
            }

            @Override
            public void process(Bitmap destBitmap, Bitmap sourceBitmap) {
                for (int x = 0; x < destBitmap.getWidth(); x++) {
                    for (int y = 0; y < destBitmap.getHeight(); y++) {
                        destBitmap.setPixel(destBitmap.getWidth() - x, y, sourceBitmap.getPixel(x, y));
                    }
                }
            }

            @Override
            public CloseableReference<Bitmap> process(Bitmap sourceBitmap, PlatformBitmapFactory bitmapFactory) {
                CloseableReference<Bitmap> bitmapRef = bitmapFactory.createBitmap(
                        sourceBitmap.getWidth() / 2,
                        sourceBitmap.getHeight() / 2);
                try {
                    Bitmap destBitmap = bitmapRef.get();
                    for (int x = 0; x < destBitmap.getWidth(); x += 2) {
                        for (int y = 0; y < destBitmap.getHeight(); y += 2) {
                            destBitmap.setPixel(x, y, sourceBitmap.getPixel(x, y));
                        }
                    }
                    return CloseableReference.cloneOrNull(bitmapRef);
                } finally {
                    CloseableReference.closeSafely(bitmapRef);
                }
            }
        };

ImageRequest request = ImageRequestBuilder.newBuilderWithSource(uri)    
        .setPostprocessor(postProcessor)
        .build();

PipelineDraweeController newController = (PipelineDraweeController)
        Fresco.newDraweeControllerBuilder()
                .setImageRequest(request)
                .setOldController(mSimpleDraweeView.getController())
                // other setters as you need
                .build();
mSimpleDraweeView.setController(newController);