Android webview usage Summary 2 interaction between Java and JavaScript

Two methods are provided first.

Method 1:

// Load the HTML file first, and then call the JavaScript function in the HTML file

Webview. loadurl ("file: // android_asset/show.html ");

Webview. loadurl ("javascript: pushnewsdata ('" + strhtml + "')");

Method 2:

// Add the Javascript interface to the Java code, and then call the object in Java in the HTML file

Webview. addjavascriptinterface (strhtml, "mycontent ");

Let the browser support JavaScript first

Webview. getsettings (). setjavascriptenabled (true); // you can use the JS function to enable it.

The JS Code can be stored in the asset folder or on the server side. To change the content, you only need to change the server side.

<! Doctype HTML public "-// W3C // dtd html 4.01 transitional // en" "http://www.w3.org/TR/html4/loose.dtd"> <HTML> 

Java code
Corresponding call_java () method
webView.addJavascriptInterface(new Object(){public void showToastFromWeb(String msg){showToast(msg);}}, "interface_test");

Corresponding to alert and other methods
Webview. setwebchromeclient (New webchromeclient () {@ overridepublic void onprogresschanged (webview view, int newprogress) {// previously mentioned in the previous blog} @ overridepublic Boolean onjsalert (webview view, string URL, string message, jsresult result) {// todo auto-generated method stubreturn super. onjsalert (view, URL, message, result) ;}@ overridepublic Boolean onjsconfirm (webview view, string URL, string message, jsresult result) {// todo auto-generated method stubreturn super. onjsconfirm (view, URL, message, result) ;}@ overridepublic Boolean onjsprompt (webview view, string URL, string message, string defaultvalue, jspromptresult result) {// todo auto-generated method stubreturn super. onjsprompt (view, URL, message, defaultvalue, result );}});
Load HTML

//webView.loadUrl("javascript:btn_test()");webView.loadUrl("file:///android_asset/test.html");