Can HTML5 access native components

I have a question. Can an HTML5 page interact with native components in android?

What i am trying to achieve is that on a HTML5 page that displays a list of content. i want to create a notification that some content has arrived.?

Im guessing, a way to do this is to use a webview and display my HTML5 content there but how to do get callback from the webview so that i can notify a user that some content has arrived via notifications bar that can be access using native android coding?

I already know how to create notifications on android and how to create a webview, i just need to find a way to send data from html5 page to a android component and possibly vice versa.

Can this be achievable or too ambitious?


Yes, you can achieve this via a JavaScript Interface. Via this the JavaScript can call functions defined in the interface you attach.

In your Activity:

WebAppInterface mInterface;

public void onCreate() {
    mInterface = new WebAppInterface(this);
    mWebView.addJavascriptInterface(mInterface, "MyAndroidInterface")

Now define an object where the calls will go to:

public class WebAppInterface {
    Context mContext;

    /** Instantiate the interface and set the context */
    WebAppInterface(Context c) {
        mContext = c;

    /** Show a toast from the web page */
    public void showToast(String toast) {
        Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();

Now in Javascript you can do:

MyAndroidInterface.showToast("hello world");

The way back (from native to Javascript) you can do via Javascript injection. Define function in Javascript:

function helloBack(param) {

Now you can call mWebView.loadUrl("javascript:helloBack(hi);");

Need Your Help

EXC_BAD_ACESS when buying an in app purchase, only after going into the store the second time

crash in-app-purchase exc-bad-access payment

Okay. I have in-app purchases working i my application. I have a view controller that acts as the store of my application, and the user can buy things from it.

Smart Stack + Docker

architecture cloud docker

I am working on a proof of concept project using Smart Stack (from airbnb) and Docker to build distributed service cloud.

About UNIX Resources Network

Original, collect and organize Developers related documents, information and materials, contains jQuery, Html, CSS, MySQL, .NET, ASP.NET, SQL, objective-c, iPhone, Ruby on Rails, C, SQL Server, Ruby, Arrays, Regex, ASP.NET MVC, WPF, XML, Ajax, DataBase, and so on.