如何添加窗口消息事件监听器-Android WebView [英] How to add window message event Listener - Android WebView

问题描述

如何添加事件侦听器以处理WebView中的window 消息事件.我已经尝试过了，

webView.evaluateJavascript("window.addEventListener('message', function (e) { Android.logData('HELLO')});", null);

但是它不起作用.有什么办法可以做到这一点?

解决方案

探索之后，我发现没有任何方法可以将运行在WebView中的网站的数据获取到应用程序，而无需在网站中添加任何代码.最后，我决定也要在我的网站上进行必要的更改.这就是我的方法:

在应用中

创建了一个课程

private class JsObject {
    @JavascriptInterface
    public void shareData(String data) {
        Log.v(LOG_TAG, data);
    }
}

将新类的实例作为Javascript接口添加到名称为

private class JsObject {
    @JavascriptInterface
    public void shareData(String data) {
        Log.v(LOG_TAG, data);
    }
}

的WebView

ssWebView.addJavascriptInterface(new JsObject(), "Android");

此实例将作为Android(名称，上述函数的第二个参数)添加到WebView的window对象中

在网站上

在网站上共享数据

window.Android && window.Android.shareData("This is the data from website");

How to add an event listener to handle window message event in a WebView. I have tried this,

webView.evaluateJavascript("window.addEventListener('message', function (e) { Android.logData('HELLO')});", null);

But it is not working. Is there any way to achieve this?

解决方案

After exploring I didn't find any way to get data from the website running in WebView to the app without adding any code to in the website. And finally, I decided to make the necessary changes on my website as well. And this is how I did it:

In App

Created a class

private class JsObject {
    @JavascriptInterface
    public void shareData(String data) {
        Log.v(LOG_TAG, data);
    }
}

Add an instance of the new class as Javascript Interface to the WebView with a name

ssWebView.addJavascriptInterface(new JsObject(), "Android");

This instance will be added to the window object of the WebView as Android(name, the second argument of the above function)

In Website

In the website to share data

window.Android && window.Android.shareData("This is the data from website");

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