<script>
window.apiready = function(){
//安卓应用
var isAndroid = (/android/gi).test(navigator.appVersion);
if (isAndroid) {
//绑定安卓的后退按钮事件 两秒内后退按钮点击两次 关闭应用
var backSecond = 0;
api.addEventListener({
    name: 'keyback'
}, function(ret, err) {
    var curSecond = new Date().getSeconds();
    if (Math.abs(curSecond - backSecond) > 2) {
        backSecond = curSecond;
        api.toast({
            msg: '连续按两次关闭系统',
            duration: 2000,
            location: 'bottom'
        });
    } else {
    	api.closeWidget({
    		id: 'A6918489928546', //这里改成自己的应用ID
    		retData: {name:'closeWidget'},
    		silent:true
    		});
    }
});
}
}
</script>