Android中webview与JS交互、互调方法实例详解

 webView_.setWebViewClient(new WebViewClient() {
      public void onPageFinished(WebView view, String url) {
        view.loadUrl(MessageFormat.format("javascript:initEvaluationPage({0})",
            Util.wrapGetParameter(json)
        ));
      }
    });

webView_.getSettings()s.setJavaScriptEnabled(true);

  var userInfo = JSON.parse(window.JSUserInfoInterface.getUserInfo());

public interface JSUserInfoInterface {

  @JavascriptInterface
  String getUserInfo();

}

 JSUserInfoInterface method3 = new JSUserInfoInterface() {

      @Override
      @JavascriptInterface
      public String getUserInfo() {
        SharedPreferences sharedPreferences = getActivity().getApplicationContext().getSharedPreferences(
            "share", Context.MODE_PRIVATE);
        String tel = sharedPreferences.getString(Constant.KEY_USERNAME, "");
        String userid = sharedPreferences.getString("userid", "");
        return "{\"user_id\":\"" + userid + "\",\"user_tel\":\"" + tel + "\"}";
      }

    };

webView_.addJavascriptInterface(method3, "JSUserInfoInterface");

 JSDialogInterface method2 = new JSDialogInterface() {

      @Override
      @JavascriptInterface
      public void changeDialog(String arg0) {
        Observable.just(arg0)
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(mess -> {
              if (mess.equals("show")) {
                ld_.show();
              } else {
                ld_.dismiss();
              }
            });
      }
    };