Android WebView之与 JaveScript交互

例如

获取网页内容

设置WebView Enable JavaScript

mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.addJavascriptInterface(new InJavaScriptLocalObj(), "local_obj");

Java供Js调用的类

final class InJavaScriptLocalObj {
@JavascriptInterface
public void showSource(String html) {
System.out.println("====>html="+html);
}
}

WebViewClient中的onPageFinished加入代码

mWebView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}

@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
view.loadUrl("javascript:window.local_obj.showSource(document.getElementsByTagName('html')[0].innerHTML);");

}
}

扩展阅读

javascript中获取 head 的方法

var head = document.head || document.getElementsByTagName(‘head’)[0];

所以上文获取showSource的参数可以为

view.loadUrl("javascript:window.local_obj.showSource(document.head.innerHTML || document.getElementsByTagName('head')[0].innerHTML);");

参考:

/article/11097750.html

/article/9546593.html

/article/2008488.html