Question

js怎么监听安卓返回键

Answer 1

<script>
// =========================PhoneGap==================================
// 等待加载PhoneGap
document.addEventListener("deviceready", onDeviceReady, false);
// PhoneGap加载完毕
function onDeviceReady() {
// 按钮事件
document.addEventListener("backbutton", eventBackButton, false); // 返回键

}

// 返回键
function eventBackButton() {
if($(".classobj").is(":visible")){
alert('再点击一次退出!');
document.removeEventListener("backbutton", eventBackButton, false); // 注销返回键
document.addEventListener("backbutton", exitApp, false);//绑定退出事件
// 3秒后重新注册
var intervalID = window.setInterval(function() {
window.clearInterval(intervalID);
document.removeEventListener("backbutton", exitApp, false); // 注销返回键
document.addEventListener("backbutton", eventBackButton, false); // 返回键
}, 3000);
}else {
//navigator.app.backHistory();

}

}

function exitApp(){
navigator.app.exitApp();
}
</script>