cordova 點擊退出

document.addEventListener("deviceready", onDeviceReady, false);

function onDeviceReady() {
//navigator.splashscreen.hide();
document.addEventListener("backbutton", onBackKeyDown, false);
}
function onBackKeyDown() {
Toast.showShort('再點擊一次退出!');
document.removeEventListener("backbutton", onBackKeyDown, false); // 註銷返回鍵
document.addEventListener("backbutton", exitApp, false);//綁定退出事件
// 3秒後從新註冊
var intervalID = window.setInterval(function() {
window.clearInterval(intervalID);
document.removeEventListener("backbutton", exitApp, false); // 註銷返回鍵
document.addEventListener("backbutton", onBackKeyDown, false); // 返回鍵
}, 3000);
}
function exitApp(){
navigator.app.exitApp();
}