如何从Java调用javascript函数时的WebView页不同 [英] How to call javascript function from java when webview page is different

问题描述

我使用HTML和web视图显示在Android项目。

I am working on an android project using HTML and webview to display.

我

display.loadUrl("file:///android_asset/index.html");
    display.setWebViewClient(new WebViewClient() {

        public void onPageFinished(WebView view, String url)
        {
            display.loadUrl("javascript:openDialog()");
        }
    });

和这个完美的作品。但是javascript函数我想打电话给在另一页（chat.html）。如何从Java调用这个页面的JavaScript功能？

and this works perfectly. But the javascript function i want to call is in another page (chat.html). How do i call the javascript functions on this pages from java?

推荐答案

如果您是网页（chat.html）的所有者，您可以集成一个JS-函数调用本地方法。而在此本机方法，你可以打电话给你的目标JS：

If you are the owner of the webpage (chat.html), you can integrate a JS-function which invokes a native method. And in this native method you can call your target-JS:

chat.html：

chat.html:

function callItNow() {
  if (typeof Android != "undefined"){ 
    if (Android.caller!= "undefined") {
      Android.caller();
    }
  }
}

在本地code，定义一个类：

in native Code, define a class:

 class MyJavascriptBridge { 

   public void caller() {
     //now you know you are on the right place (chat.html)
     webView.loadUrl("javascript:openDialog()"); 
   }
 }

当然，你必须桥申报的网页视图：

and of course you have to declare the bridge to your webview:

 webView.addJavascriptInterface(new MyJavascriptBridge(), "Android");

这篇关于如何从Java调用javascript函数时的WebView页不同的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！