Answered by : loonix-o8mqantjpr9f

/// if you are using flutter_webview_plugin set it on WebviewManager.java
webView.setBackgroundColor(0x00000000);

Source : https://stackoverflow.com/questions/15550700/how-to-get-transparent-background-of-webview-for-4-0-version | Last Update : Fri, 25 Jun 21