Support for other protocols in Android webview

Question

I've created a web view app, the page that is displayed features market:// links but upon clicking them I get the 404 screen along with the error that the protocol is not supported. I've tried looking through documentation but was unable to find anything relating to this. Any help is much appreciated.

Answer 1

For me the JavaScript thing wasn't a solution as the HTML is not under my control. So if you need to control this from the application side, then there is a relative simple solution: Derive from WebViewClientand inject the implementation using WebView.setWebViewClient(). All you need to override in your WebViewClientimplementation is the shouldOverrideUrlLoading method as shown here:

public boolean shouldOverrideUrlLoading(WebView view, String url) {
    if (url != null && url.startsWith("market://")) {
        view.getContext().startActivity(
            new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
        return true;
    } else {
        return false;
    }
}

For me this works fine.

Answer 2

HOPE THIS HELPS YOU

public boolean shouldOverrideUrlLoading(WebView view, String url) 
{
    if (url.startsWith("market://")||url.startsWith("vnd:youtube")||url.startsWith("tel:")||url.startsWith("mailto:"))
    {
        Intent intent = new Intent(Intent.ACTION_VIEW); 
        intent.setData(Uri.parse(url)); 
        startActivity(intent);
        return true;
     }
    else{
        view.loadUrl(url);
        return true;
        }
}

Answer 3

For the links to work you have to have the market app installed on your device/emulator. Also your app need to request a permission to access network.

UPD: as a workaround you can call java code from within the webview, for example if you generate links like this:

<a href="javascript:go('market://your.path.to.market.app')">..</a>

Define a javascript function named go():

<script type="text/javascript">
   function go(link) {
     if (handler) {
           handler.go(link);
         } else {
           document.location = link;
         }
   }
</script>

You then can pass in a handler object into the WebView:

webview.addJavascriptInterface(new Handler() {
        @Override
        public void go(String marketUrl) {
                         //start market intent here
        }
    },  "handler");

Handler interface can be defined as follows:

   public interface Handler{

    public void go(String url);

}