js调安卓：

//js
/**
     * 调用移动端方法
     */
    function jsCallMobileFinish() {
        let device = getDevice();
        let data = null;
        if (device === "android") {
            if (window.Android) {
                data = window.Android.jsCallMobileFinish();
            }
        } else if (device === "ios") {
            if (window.webkit) {      //调用IOS的jumpjumpNext（）方法     
                data = window.webkit.messageHandlers.jsCallMobileFinish.postMessage("");
            }
        }
        return data;
    }

/**
     * 获取移动设备
     * @returns {*}
     */
    function getDevice() {
        let u = navigator.userAgent,
            app = navigator.appVersion;
        let isAndroid = u.indexOf('Android') > -1 || u.indexOf('Linux') > -1; //android终端或者uc浏览器 
        let isiOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/); //ios终端 
        if (isAndroid) {
            return "android"
        } else if (isiOS) {
            return "ios"
        } else {
            return null
        }
    }

//安卓
mWebView?.addJavascriptInterface(InJavaScript(), "Android")
val webSettings = mWebView!!.settings
webSettings.javaScriptEnabled = true


class InJavaScript {
        @JavascriptInterface
        fun get(data: String?) {
            if (data != null ) {
                try {

                } catch (e: Exception) {
                    e.printStackTrace()
                }
            }else{
            }
        }
    }

安卓调用js：

//安卓
fun callJsMethod(methodName:String,vararg params:String?){
        var paramsStr = ""
        params.let {
            paramsStr = "\'${it.joinToString("\',\'")}\'"
        }
        val url = "javascript:$methodName($paramsStr)"
        LogUtils.i("huanghai","url",url)
        webview.loadUrl(url)

       // webview.layoutParams = LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT)
    }

//js
window.androidCallJs = function() {
        
    }