1、方法代码

fun imgReset(){
        webView.loadUrl(
            "javascript:(function(){" +
                    "var objs = document.getElementsByTagName('img'); " +
                    "for(var i=0;i<objs.length;i++) " +
                    "{"
                    + "var img = objs[i]; " +
                    " img.style.maxWidth = '100%'; img.style.height = 'auto'; " +
                    "}" +
                    "})()")
 }

2、使用时机

webView.webViewClient=object :WebViewClient(){
            override fun onPageFinished(view: WebView?, url: String?) {
                super.onPageFinished(view, url)
                //webView.imgReset()
                        imgReset()
            }
        }

3、生成扩展方法

fun WebView.imgReset() {
    this.loadUrl("""javascript:(function(){
        |var objs = document.getElementsByTagName('img');
        | for(var i=0;i<objs.length;i++){
        | var img = objs[i];
        |  img.style.maxWidth = '100%';
        |   img.style.height = 'auto'; }
        |   })()""".trimMargin())

}

android WebView 富文本神器