js调用

1.js交互webview的初始化中添加：

webSetting.setJavaScriptEnabled(true);
mWebView.addJavascriptInterface(new InJavaScriptNetObj(), "java_jump");

定义的类：

public class InJavaScriptNetObj {
    @JavascriptInterface
    public void getNative() {
      //js调用时候，客户端要执行的方法

    }

}

js调用的混淆：

-keepclassmembers class 包名.类名$InJavaScriptNetObj{
  public *;
}

2.监听webview中html页面是否有某些控件：

mWebView.addJavascriptInterface(new InJavaScriptLocalObj(), "java_obj");

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

            @Override
            public WebResourceResponse shouldInterceptRequest(WebView view,
                                                              WebResourceRequest request) {
                                return super.shouldInterceptRequest(view, request);
            }


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


            }
        });

public   class InJavaScriptLocalObj {
      @JavascriptInterface
      public void getSource(String html) {
//对html进行操作等         

      }

  }