Cordova(ionic)項(xiàng)目實(shí)現(xiàn)雙擊返回鍵退出應(yīng)用

第Cordova(ionic)項(xiàng)目實(shí)現(xiàn)雙擊返回鍵退出應(yīng)用publicbooleanonKeyDown(intkeyCode,KeyEventevent){

if(keyCode==KeyEvent.KEYCODE_BACK){

exit();

returnsuper.onKeyDown(keyCode,event);

publicvoidexit(){

if((System.currentTimeMillis()-exitTime)2000){

//點(diǎn)擊間隔大于兩秒，做出提示

Toast.makeText(getApplicationContext(),"再按一次退出應(yīng)用",Toast.LENGTH_SHORT).show();

exitTime=System.currentTimeMillis();

}else{

finish();

System.exit(0);

}

然而，在Cordova項(xiàng)目中，在繼承CordovaActivity的MainActivity中添加上面的代碼并不起作用，原因是返回鍵已經(jīng)被Cordava的WebView處理掉了。

解決辦法：在app.js的config中添加如下代碼：

//等待加載PhoneGap

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

//PhoneGap加載完畢

functiononDeviceReady(){

//按鈕事件

document.addEventListener("backbutton",eventBackButton,false);//返回鍵

document.addEventListener("menubutton",eventMenuButton,false);//菜單鍵

document.addEventListener("searchbutton",eventSearchButton,false);//搜索鍵

//返回鍵

functioneventBackButton(){

//confirm("再點(diǎn)擊一次退出!");

window.plugins.ToastPlugin.show_short('再點(diǎn)擊一次退出!');

document.removeEventListener("backbutton",eventBackButton,false);//注銷返回鍵

//3秒后重新注冊

varintervalID=window.setInterval(

function(){

window.clearInterval(intervalID);

document.addEventListener("backbutton",eventBackButton,false);//返回鍵

3000

//菜單鍵

functioneventMenuButton(){

window.plugins.ToastPlugin.show_short('點(diǎn)擊了菜單按鈕!');

//搜索鍵

functioneventSearchButton(){

window.plugins.ToastPlugin.show_short('點(diǎn)擊了搜索按鈕!');

}

上面的腳本用到了Cordov