fresco加载gif图片到99%卡住的bug

解决方案,复制HttpUrlConnectionNetworkFetcher类中的代码,新建一个类叫做CustomImageDownloaderFetcher,将fetchSync()方法中的callback.onResponse(is, -1);改为callback.onResponse(is, connection.getContentLength());

再在初始化Fresco时,传入自定义类ImagePipelineConfig.newBuilder(context).setNetworkFetcher(newCustomImageDownloaderFetcher())