Question

Is it possible to capture a press and hold event of an Android Devices back button to close the app?

Cheers
Paul

Answer 1

yes, see the PhoneGap API:
http://docs.phonegap.com/en/1.0.0/phonegap_events_events.md.html

// Call onDeviceReady when PhoneGap is loaded.
//
// At this point, the document has loaded but phonegap.js has not.
// When PhoneGap is loaded and talking with the native device,
// it will call the event `deviceready`.
// 
document.addEventListener("deviceready", onDeviceReady, false);

// PhoneGap is loaded and it is now safe to make calls PhoneGap methods
//
function onDeviceReady() {
    // Register the event listener
    document.addEventListener("backbutton", onBackKeyDown, false);
}

// Handle the back button
//
function onBackKeyDown() {
}