private void InvokeFragmentTransaction(FragmentInfo fragmentInfo)
{
if (fragmentInfo.FragmentInstance == _currentFragment)
{
return;
}
var fragmentTransaction = CurrentFragmentManager.BeginTransaction();
var fragment = fragmentInfo.FragmentInstance;
fragment.ViewModel = fragmentInfo.ViewModelInstance;
if (CurrentFragmentManager.FindFragmentByTag(fragmentInfo.JavaFragmentName) != null)
{
fragmentTransaction.Show(CurrentFragmentManager.FindFragmentByTag(
fragmentInfo.JavaFragmentName));
}
else
{
fragmentTransaction.Add(fragmentInfo.FragmentContentId,
(Fragment)fragment, fragmentInfo.JavaFragmentName);
}
fragmentTransaction.Commit();
fragmentTransaction = CurrentFragmentManager.BeginTransaction();
if (_currentFragment != null)
{
fragmentTransaction.Hide(_currentFragment);
}
fragmentTransaction.Commit();
_currentFragment = (Fragment)fragment;
fragmentInfo.ViewModelInstance.ViewAppearing();
}
protected virtual bool TryPerformCloseFragmentTransaction(
FragmentManager fragmentManager,
MvxFragmentPresentationAttribute fragmentAttribute)
{
try
{
var fragmentName = fragmentAttribute.ViewType.FragmentJavaName();
if (fragmentManager.BackStackEntryCount > 0)
{
var popBackStackFragmentName = fragmentAttribute.PopBackStackImmediateName?.Trim() == ""
? fragmentName
: fragmentAttribute.PopBackStackImmediateName;
fragmentManager.PopBackStackImmediate(popBackStackFragmentName, fragmentAttribute.PopBackStackImmediateFlag.ToNativePopBackStackFlags());
OnFragmentPopped(null, null, fragmentAttribute);
return(true);
}
else if (CurrentFragmentManager.FindFragmentByTag(fragmentName) != null)
{
var ft = fragmentManager.BeginTransaction();
var fragment = fragmentManager.FindFragmentByTag(fragmentName);
if (!fragmentAttribute.EnterAnimation.Equals(int.MinValue) && !fragmentAttribute.ExitAnimation.Equals(int.MinValue))
{
if (!fragmentAttribute.PopEnterAnimation.Equals(int.MinValue) && !fragmentAttribute.PopExitAnimation.Equals(int.MinValue))
{
ft.SetCustomAnimations(fragmentAttribute.EnterAnimation, fragmentAttribute.ExitAnimation, fragmentAttribute.PopEnterAnimation, fragmentAttribute.PopExitAnimation);
}
else
{
ft.SetCustomAnimations(fragmentAttribute.EnterAnimation, fragmentAttribute.ExitAnimation);
}
}
if (fragmentAttribute.TransitionStyle != int.MinValue)
{
ft.SetTransitionStyle(fragmentAttribute.TransitionStyle);
}
ft.Remove(fragment);
ft.CommitAllowingStateLoss();
OnFragmentPopped(ft, fragment, fragmentAttribute);
return(true);
}
}
catch (System.Exception ex)
{
MvxLog.Instance.Error("Cannot close fragment transaction", ex);
return(false);
}
return(false);
}
protected virtual ValueTask<bool> CloseFragmentDialog(IMvxViewModel viewModel, MvxDialogFragmentPresentationAttribute? attribute)
{
string? tag = attribute?.ViewType?.FragmentJavaName();
var toClose = CurrentFragmentManager.FindFragmentByTag(tag);
if (toClose != null && toClose is DialogFragment dialog)
{
dialog.DismissAllowingStateLoss();
return new ValueTask<bool>(true);
}
return new ValueTask<bool>(false);
}
protected virtual Fragment GetFragmentByViewType(Type type)
{
var fragmentName = type.FragmentJavaName();
var fragment = CurrentFragmentManager?.FindFragmentByTag(fragmentName);
if (fragment != null)
{
return(fragment);
}
return(FindFragmentInChildren(fragmentName, CurrentFragmentManager));
}
protected virtual Task <bool> CloseFragmentDialog(IMvxViewModel viewModel, MvxDialogFragmentPresentationAttribute attribute)
{
string tag = FragmentJavaName(attribute.ViewType);
var toClose = CurrentFragmentManager.FindFragmentByTag(tag);
if (toClose != null && toClose is DialogFragment dialog)
{
dialog.DismissAllowingStateLoss();
return(Task.FromResult(true));
}
return(Task.FromResult(false));
}
protected override bool CloseFragmentDialog(IMvxViewModel viewModel, MvxDialogFragmentPresentationAttribute attribute)
{
var tag = FragmentJavaName(attribute.ViewType);
var toClose = CurrentFragmentManager?.FindFragmentByTag(tag);
if (toClose is DialogFragment dialog)
{
dialog.DismissAllowingStateLoss();
return(true);
}
return(false);
}
protected virtual bool TryPerformCloseFragmentTransaction(
FragmentManager fragmentManager,
MvxFragmentPresentationAttribute fragmentAttribute)
{
var fragmentName = fragmentAttribute.ViewType.FragmentJavaName();
if (fragmentManager.BackStackEntryCount > 0)
{
fragmentManager.PopBackStackImmediate(fragmentName, PopBackStackFlags.Inclusive);
OnFragmentPopped(null, null, fragmentAttribute);
return(true);
}
else if (CurrentFragmentManager.FindFragmentByTag(fragmentName) != null)
{
var ft = fragmentManager.BeginTransaction();
var fragment = fragmentManager.FindFragmentByTag(fragmentName);
if (!fragmentAttribute.EnterAnimation.Equals(int.MinValue) && !fragmentAttribute.ExitAnimation.Equals(int.MinValue))
{
if (!fragmentAttribute.PopEnterAnimation.Equals(int.MinValue) && !fragmentAttribute.PopExitAnimation.Equals(int.MinValue))
{
ft.SetCustomAnimations(fragmentAttribute.EnterAnimation, fragmentAttribute.ExitAnimation, fragmentAttribute.PopEnterAnimation, fragmentAttribute.PopExitAnimation);
}
else
{
ft.SetCustomAnimations(fragmentAttribute.EnterAnimation, fragmentAttribute.ExitAnimation);
}
}
if (fragmentAttribute.TransitionStyle != int.MinValue)
{
ft.SetTransitionStyle(fragmentAttribute.TransitionStyle);
}
ft.Remove(fragment);
ft.CommitAllowingStateLoss();
OnFragmentPopped(ft, fragment, fragmentAttribute);
return(true);
}
return(false);
}
protected virtual Fragment GetFragmentByViewType(Type type)
{
var fragmentName = FragmentJavaName(type);
return(CurrentFragmentManager.FindFragmentByTag(fragmentName));
}