protected override void OnDestroy()
{
base.OnDestroy();
try
{
AppManager.Instance().RemoveActivity(this);
}
catch (Java.Lang.Exception ex)
{ }
}
public override bool OnKeyDown([GeneratedEnum] Keycode keyCode, KeyEvent e)
{
if (keyCode == Keycode.Back && e.Action == KeyEventActions.Down)
{
//这里解决Popup 弹出后，点击回退健时不能释放Popup问题
Device.BeginInvokeOnMainThread(async() =>
{
if (PopupNavigation.Instance.PopupStack.Count > 0)
{
await PopupNavigation.Instance.PopAllAsync();
}
});
if (!lastBackKeyDownTime.HasValue || (DateTime.Now - lastBackKeyDownTime.Value) > new TimeSpan(0, 0, 2))
{
var actionPage = App.Current.MainPage;
if (actionPage?.Navigation != null && actionPage?.Navigation?.NavigationStack?.Count != 0)
{
actionPage = actionPage.Navigation.NavigationStack.Last();
if (null != actionPage)
{
if (actionPage is MainLayoutPage)
{
ToastUtils.ShowSingleToast("再按一次退出程序");
lastBackKeyDownTime = DateTime.Now;
return(true);
}
else if (actionPage is LoginPage)
{
MoveTaskToBack(true);
return(false);
}
else
{
Device.BeginInvokeOnMainThread(async() =>
{
await actionPage?.Navigation.PopAsync(true);
});
}
}
}
}
else
{
//移除Activity
AppManager.Instance().ExitApp();
}
return(true);
}
return(base.OnKeyDown(keyCode, e));
}
public override void OnCreate(Bundle savedInstanceState, PersistableBundle persistentState)
{
base.OnCreate(savedInstanceState, persistentState);
try
{
AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;
TaskScheduler.UnobservedTaskException += TaskScheduler_UnobservedTaskException;
AppManager.Instance().AddActivity(this);
}
catch (Java.Lang.Exception ex)
{ }
}