This is a simple demo for showing an image from the webView and downloading an image from the webView. The ShowImageWebView is a wrapping widget for the webView to show an image from the webView and download an image from the webView. 点击 WebView 页面的图片实现开启查看图片模式,即可以显示点击的图片,然后滑动显示下一张图片。 长按 WebView 页面图片弹出对话框可以选择保存长按的图片到本地相册。