/// <summary>
/// A fragment transition animation has ended.
/// </summary>
/// <param name="enter">if set to <c>true</c> a new fragment has entered.</param>
public void FragmentAnimationEnded(bool enter)
{
if (enter)
{
var oldFragment = Fragments.Count > 1 ? Fragments[Fragments.Count - 2] : null;
var newFragment = Fragments.Last();
if (oldFragment != null)
{
oldFragment.OnFragmentDidHide();
oldFragment.View.Visibility = ViewStates.Invisible;
}
newFragment.OnFragmentDidShow();
}
else
{
var newFragment = Fragments.Count > 1 ? Fragments[Fragments.Count - 2] : null;
var oldFragment = Fragments.Last();
oldFragment.OnFragmentDidHide();
newFragment?.OnFragmentDidShow();
Fragments.Remove(Fragments.Last());
}
InFragmentTransition = false;
}
/// <summary>
/// Pops the top-most fragment from the view stack.
/// </summary>
public void PopTopFragment()
{
if (Fragments.Count > 1)
{
var oldFragment = Fragments.Last();
var tx = FragmentManager.BeginTransaction();
tx.SetCustomAnimations(global::Android.Resource.Animator.FadeIn, global::Android.Resource.Animator.FadeOut, global::Android.Resource.Animator.FadeIn, global::Android.Resource.Animator.FadeOut);
tx.Remove(oldFragment);
InFragmentTransition = true;
tx.Commit();
}
}
/// <summary>
/// Called to process key events.
/// </summary>
/// <param name="e">The key event.</param>
public override bool DispatchKeyEvent(KeyEvent e)
{
//
// If we are in the middle of a transition, ignore all keys.
//
if (InFragmentTransition == true)
{
return(true);
}
//
// If we are currently loading a new action then disable everything
// except the Back button.
//
if (LoadingCancellationTokenSource != null)
{
if (e.KeyCode == Keycode.Back)
{
if (!Fragments.Any())
{
return(base.DispatchKeyEvent(e));
}
LoadingCancellationTokenSource.Cancel();
LoadingCancellationTokenSource = null;
HideLoading();
}
return(true);
}
if (Fragments.Any())
{
if (Fragments.Last().DispatchKeyEvent(e))
{
return(true);
}
}
return(base.DispatchKeyEvent(e));
}
/// <summary>
/// A fragment transition animation has started.
/// </summary>
/// <param name="enter">if set to <c>true</c> a new fragment is entering.</param>
public void FragmentAnimationStarted(bool enter)
{
if (enter)
{
var oldFragment = Fragments.Count > 1 ? Fragments[Fragments.Count - 2] : null;
var newFragment = Fragments.Last();
oldFragment?.OnFragmentWillHide();
newFragment.OnFragmentWillShow();
}
else
{
var newFragment = Fragments.Count > 1 ? Fragments[Fragments.Count - 2] : null;
var oldFragment = Fragments.Last();
oldFragment.OnFragmentWillHide();
if (newFragment != null)
{
newFragment.OnFragmentWillShow();
newFragment.View.Visibility = ViewStates.Visible;
}
}
}
