Useful examples for Developing apps with the Chromium based WebView
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README.md

Chromium WebView Samples

This is a repository with useful examples for developing apps using the Chromium WebView.

If you spot any issues or questions please feel free to file an issue or reach out to @gauntface.

WebRTC

In the Developer Preview of L the WebView will support WebRTC.

The methods this example relies may change as this is only a preview. At the moment the example is using the new permission request API in WebChromeClient:

mWebRTCWebView.setWebChromeClient(new WebChromeClient() {
    @Override
    public void onPermissionRequest(final PermissionRequest request) {
        getActivity().runOnUiThread(new Runnable() {
            @Override
            public void run() {
                request.grant(request.getResources());
            }
        });
    }
});

In the final version of this example should change with the launch of L to use the preauthorizePermission method (At the moment this method is not working).

WebRTC on the Chrome WebView Example

##TEXT_AUTOSIZING

From KitKat and above, there will no longer be support for SINGLE_COLUMN or NARROW_COLUMN layout algorithms.

However a new layout algorithm TEXT_AUTOSIZING was added and textautosizing-example contains a basic example to see the affects of the algorithm.

Image Show off TEXT_AUTOSIZING

##Touch Events in the WebView

In the older version of the WebView developers didn't need to implement the touchcancel event, although it's good practice to do so.

In the Chromium WebView it's important to implement the touchcancel event as certain scenarios will trigger a touchcancel event instead of a touchend event, where they wouldn't before (i.e. a user scrolls off of an element or e.preventDefault() isn't called in the touchstart event).

The web-touch-example contains a simple app which uses touch to move an element and reveal a little Android.

Image of WebView Touch Example

##JS Interface in the WebView

This example demonstrates the following:

  • Using evaluateJavascript()
  • Adding a javascript interface
  • Hiding the white flash of the WebView load
  • Saving state of the WebView

Image of WebView JS Interface

Fullscreen Video

This demo illustrates how to set a custom poster image, how to show the fullscreen button for a element only when available and how to implement fullscreen videos.

Image of Fullscreen Video Sample

File Input

This demonstrates the use of the onShowFileChooser() method in WebChromeClient including how to handle the activity result.

Image of File Input Sample