Android and js interaction

There are two forms of interaction between Android and js: 1.js call Android method and pass parameters: mWebSettings.setJavaScriptEnabled(true); //Add this sentence to use the javascript method        mWebView.addJavascriptInterface(new Object() {//Add interface Method, let the html page call            @JavascriptInterface            public void jsMethod(String id,String type) {
                    Toast.makeText(MainActivity.this,"parameter 1:"+id+"parameter 2:"+type,Toast.LENGTH_LONG).show() ;            }            @JavascriptInterface            public void jsTitle( String title) {
                    Toast.makeText(MainActivity.this,"Parameter 1:"+title,Toast.LENGTH_LONG).show();            }        }, "stub"); 2. Android calls js Method and pass parameters: mWebView.
    





    




    






    
            @Override             public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error){
                     //Note: The super sentence must be deleted or commented out, otherwise the handler.cancel() default does not support https.                 //super.onReceivedSslError(view, handler, error);                 //handler.cancel(); // Android default processing method                 //handler.handleMessage(Message msg); // other processing                 handler.proceed(); / / Accept all website certificates             }             @Override             public boolean shouldOverrideUrlLoading(WebView view, String url) {
     // view.loadUrl(url);// When opening a new link, use the current WebView instead of using other browsers in the system to                 return true;             }             @Override

    








    





            public void onPageFinished(WebView view, String url) {
                     super.onPageFinished(view, url);                 String usr="ppp";                 Log.i("=====", "onPageFinished: -------- ");                 //Execute the js function you want to call here                 mWebView.loadUrl("javascript:test_coupon('"+usr+ "','" +usr+"')"); //load the page             }         });