Fresco如何获取图片的真是宽高比例，实现瀑布流

最新推荐文章于 2021-12-22 21:54:34 发布

原创最新推荐文章于 2021-12-22 21:54:34 发布 · 3.9k 阅读

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本文介绍了一个使用Fresco库实现图片加载时自动调整视图高度的方法。该方法通过设置DraweeController并监听图片加载完成事件来计算并设置目标视图的高度，确保图片能够按指定宽度等比例展示。

public class UitlsToos {

    /**
     * 通过imageWidth 的宽度，自动适应高度
     * * @param simpleDraweeView view
     * * @param imagePath  Uri
     * * @param imageWidth width
     */
    public static void setControllerListener(final SimpleDraweeView simpleDraweeView, String imagePath, final int imageWidth) {
        final ViewGroup.LayoutParams layoutParams = simpleDraweeView.getLayoutParams();
        ControllerListener controllerListener = new BaseControllerListener<ImageInfo>() {
            @Override
            public void onFinalImageSet(String id, @Nullable ImageInfo imageInfo, @Nullable Animatable anim) {
                if (imageInfo == null) {
                    return;
                }
                int height = imageInfo.getHeight();
                int width = imageInfo.getWidth();
                layoutParams.width = imageWidth;
                layoutParams.height = (int) ((float) (imageWidth * height) / (float) width);
                simpleDraweeView.setLayoutParams(layoutParams);
            }

            @Override
            public void onIntermediateImageSet(String id, @Nullable ImageInfo imageInfo) {
                Log.d("TAG", "Intermediate image received");
            }

            @Override
            public void onFailure(String id, Throwable throwable) {
                throwable.printStackTrace();
            }
        };
        DraweeController controller = Fresco.newDraweeControllerBuilder().setControllerListener(controllerListener).setUri(Uri.parse(imagePath)).build();
        simpleDraweeView.setController(controller);
    }
}