private void PopFragment(FragmentManager fragmentManager, MvxFragmentPresentationAttribute fragmentAttribute,
Fragment fragmentToPop)
{
var ft = fragmentManager.BeginTransaction();
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(fragmentToPop);
ft.CommitAllowingStateLoss();
OnFragmentPopped(ft, fragmentToPop, fragmentAttribute);
}
protected virtual void PerformShowFragmentTransaction(
FragmentManager fragmentManager,
MvxFragmentPresentationAttribute attribute,
MvxViewModelRequest request)
{
var fragmentName = attribute.ViewType.FragmentJavaName();
IMvxFragmentView fragment = null;
if (attribute.IsCacheableFragment)
{
fragment = (IMvxFragmentView)fragmentManager.FindFragmentByTag(fragmentName);
}
fragment = fragment ?? CreateFragment(fragmentManager, attribute, attribute.ViewType);
var fragmentView = fragment.ToFragment();
// MvxNavigationService provides an already instantiated ViewModel here
if (request is MvxViewModelInstanceRequest instanceRequest)
{
fragment.ViewModel = instanceRequest.ViewModelInstance;
}
// save MvxViewModelRequest in the Fragment's Arguments
var bundle = new Bundle();
var serializedRequest = NavigationSerializer.Serializer.SerializeObject(request);
bundle.PutString(ViewModelRequestBundleKey, serializedRequest);
if (fragmentView != null)
{
if (fragmentView.Arguments == null)
{
fragmentView.Arguments = bundle;
}
else
{
fragmentView.Arguments.Clear();
fragmentView.Arguments.PutAll(bundle);
}
}
var ft = fragmentManager.BeginTransaction();
OnBeforeFragmentChanging(ft, fragmentView, attribute, request);
if (attribute.AddToBackStack)
{
ft.AddToBackStack(fragmentName);
}
OnFragmentChanging(ft, fragmentView, attribute, request);
ft.Replace(attribute.FragmentContentId, fragmentView, fragmentName);
ft.CommitAllowingStateLoss();
OnFragmentChanged(ft, fragmentView, attribute, request);
}
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, (int)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);
}
private bool loadFragment(Fragment fragment)
{
if (fragment != null)
{
AndroidX.Fragment.App.FragmentTransaction ft = fm.BeginTransaction();
ft.SetCustomAnimations(Resource.Animation.fragment_open_enter, Resource.Animation.fragment_open_exit, Resource.Animation.abc_popup_enter, Resource.Animation.abc_popup_exit);
ft.Replace(Resource.Id.fragmContainer, fragment).Commit();
return(true);
}
return(false);
}
private void Bnve_NavigationItemSelected(object sender, BottomNavigationView.NavigationItemSelectedEventArgs e)
{
switch (e.Item.ItemId)
{
case Resource.Id.action_earning:
fragmentManager.BeginTransaction()
.Hide(activeFragment)
.Show(earningsFragment)
.Commit();
activeFragment = earningsFragment;
break;
case Resource.Id.action_home:
fragmentManager.BeginTransaction()
.Hide(activeFragment)
.Show(homeFragment)
.Commit();
activeFragment = homeFragment;
break;
case Resource.Id.action_rating:
fragmentManager.BeginTransaction()
.Hide(activeFragment)
.Show(ratingsFragment)
.Commit();
activeFragment = ratingsFragment;
break;
case Resource.Id.action_account:
fragmentManager.BeginTransaction()
.Hide(activeFragment)
.Show(accountFragment)
.Commit();
activeFragment = accountFragment;
break;
default:
return;
}
}
private void LoadFragments()
{
activeFragment = homeFragment;
fragmentManager = SupportFragmentManager;
fragmentManager.BeginTransaction()
.Add(containerId, homeFragment, "Home")
.Commit();
fragmentManager.BeginTransaction()
.Add(containerId, earningsFragment, "Earnings")
.Hide(earningsFragment)
.Commit();
fragmentManager.BeginTransaction()
.Add(containerId, ratingsFragment, "Ratings")
.Hide(ratingsFragment)
.Commit();
fragmentManager.BeginTransaction()
.Add(containerId, accountFragment, "Account")
.Hide(accountFragment)
.Commit();
}
public override void Show(FragmentManager manager, string tag)
{
try
{
var transaction = manager.BeginTransaction();
transaction.Add(this, Tag);
transaction.CommitAllowingStateLoss();
}
catch (IllegalStateException e)
{
// This sometimes fails for some reason, not sure why
Logger.Error(e);
}
}
public void Initialize()
{
LatLng southwest = new LatLng(30, 118);
CameraPosition.Builder builder = new CameraPosition.Builder();
CameraPosition cameraPosition =
builder.Target(southwest).Zoom(2).Bearing(2.0f).Tilt(2.5f).Build();
HuaweiMapOptions huaweiMapOptions = new HuaweiMapOptions().InvokeCamera(cameraPosition);
mSupportMapFragment = SupportMapFragment.NewInstance(huaweiMapOptions);
mSupportMapFragment.GetMapAsync(this);
AndroidX.Fragment.App.FragmentManager fragmentManager = SupportFragmentManager;
AndroidX.Fragment.App.FragmentTransaction fragmentTransaction = fragmentManager.BeginTransaction();
fragmentTransaction.Add(Resource.Id.frame_supportmapcode, mSupportMapFragment);
fragmentTransaction.Commit();
}
protected virtual Task <bool> CloseViewPagerFragment(IMvxViewModel viewModel,
MvxViewPagerFragmentPresentationAttribute attribute)
{
ViewPager viewPager = null;
FragmentManager fragmentManager = null;
if (attribute?.FragmentHostViewType != null)
{
var fragment = GetFragmentByViewType(attribute.FragmentHostViewType);
if (fragment == null)
{
throw new MvxException("Fragment not found", attribute.FragmentHostViewType.Name);
}
viewPager = fragment.View.FindViewById <ViewPager>(attribute.ViewPagerResourceId);
fragmentManager = fragment.ChildFragmentManager;
}
else
{
viewPager = CurrentActivity.FindViewById <ViewPager>(attribute.ViewPagerResourceId);
fragmentManager = CurrentFragmentManager;
}
if (viewPager?.Adapter is MvxCachingFragmentStatePagerAdapter adapter)
{
var ft = fragmentManager.BeginTransaction();
var fragmentInfo = FindFragmentInfoFromAttribute(attribute, adapter);
var fragment = fragmentManager.FindFragmentByTag(fragmentInfo.Tag);
adapter.FragmentsInfo.Remove(fragmentInfo);
ft.Remove(fragment);
ft.CommitAllowingStateLoss();
adapter.NotifyDataSetChanged();
OnFragmentPopped(ft, fragment, attribute);
return(Task.FromResult(true));
}
return(Task.FromResult(false));
}
protected virtual void PerformShowFragmentTransaction(
FragmentManager fragmentManager,
MvxFragmentPresentationAttribute attribute,
MvxViewModelRequest request)
{
ValidateArguments(attribute, request);
if (fragmentManager == null)
{
throw new ArgumentNullException(nameof(fragmentManager));
}
var fragmentName = attribute.Tag ?? attribute.ViewType.FragmentJavaName();
IMvxFragmentView?fragmentView = null;
if (attribute.IsCacheableFragment)
{
fragmentView = (IMvxFragmentView)fragmentManager.FindFragmentByTag(fragmentName);
}
if (fragmentView == null && attribute.ViewType != null)
{
fragmentView = CreateFragment(fragmentManager, attribute, attribute.ViewType);
}
var fragment = fragmentView.ToFragment();
if (fragment == null)
{
throw new MvxException($"Fragment {fragmentName} is null. Cannot perform Fragment Transaction.");
}
// MvxNavigationService provides an already instantiated ViewModel here
if (request is MvxViewModelInstanceRequest instanceRequest)
{
fragmentView !.ViewModel = instanceRequest.ViewModelInstance;
}
// save MvxViewModelRequest in the Fragment's Arguments
#pragma warning disable CA2000 // Dispose objects before losing scope
var bundle = new Bundle();
#pragma warning restore CA2000 // Dispose objects before losing scope
var serializedRequest = NavigationSerializer.Serializer.SerializeObject(request);
bundle.PutString(ViewModelRequestBundleKey, serializedRequest);
if (fragment.Arguments == null)
{
fragment.Arguments = bundle;
}
else
{
fragment.Arguments.Clear();
fragment.Arguments.PutAll(bundle);
}
var ft = fragmentManager.BeginTransaction();
OnBeforeFragmentChanging(ft, fragment, attribute, request);
if (attribute.AddToBackStack)
{
ft.AddToBackStack(fragmentName);
}
OnFragmentChanging(ft, fragment, attribute, request);
if (attribute.AddFragment && fragment.IsAdded)
{
ft.Show(fragment);
}
else if (attribute.AddFragment)
{
ft.Add(attribute.FragmentContentId, fragment, fragmentName);
}
else
{
ft.Replace(attribute.FragmentContentId, fragment, fragmentName);
}
ft.CommitAllowingStateLoss();
OnFragmentChanged(ft, fragment, attribute, request);
}
