[android-developers] Javascript binding issues

I'm working up some new code that uses Javascript binding, described here:

http://developer.android.com/guide/webapps/webview.html#BindingJavaScript

1) Is there any way to speed it up? There's about a 2-3 second delay
before a click executes my Javascript clickContact() function in my
activity. I'm attaching to my <tr> with jQuery, like this:

$.each($('tr[class=contact]'), function(i, obj) {
$(obj).click(function() {
Android.clickContact($(obj).attr('id'));
});
});

I tried attached to my <a> tags, but that's just as slow.

My Android code:

public class ContactsJS
{
private final Contacts con;
private final Context c;

public ContactsJS( final Contacts contacts, final Context context )
{
con = contacts;
c = context;
}

public void clickContact( final String contact_id )
{
con.clickContact( contact_id );
}
}

WebView contacts = (WebView) findViewById( R.id.contacts );
contacts.addJavascriptInterface( new ContactsJS( this, this ), "Android" );

It works, but it's really slow.

2) How can I get WebKit to provide some sort of click feedback? Since
I have problem #1, described above, I really need to provide some
click/tap feedback. My jQuery code below works great in Chrome and
Firefox, highlights red like expected, but in the Android browser it
doesn't do anything. I had some debug code in there, mousedown and
mouseup never fire.

$.each($('a[class=click]'), function(i, obj) {
$(obj).mousedown(function() {
$(obj).parent().css("background-color", '#f00');
}).mouseup(function() {
$(obj).parent().css("background-color", 'transparent');
});
});

I also tried the other mouse events described here:

http://api.jquery.com/category/events/mouse-events/

And I tried attaching to the <tr>s and <td>s instead of my <a>s, can't
get anything to fire in the Android browser.

How can I provide some click feedback for my slow Javascript binding?

Thanks,

--
Greg Donald

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