【PHP】安卓手机监听物理返回按键

if(window.history && window.history.pushState) {
$(window).on('popstate', function() {
var hashLocation = location.hash;
var hashSplit = hashLocation.split("#!/");
var hashName = hashSplit[1];
if(hashName !== '') {
var hash = window.location.hash;
if(hash === '') {
alert("你点击了返回键");
            }
        }
    });
window.history.pushState('forward', null, '#');
}