OnTabChanged not called when click on current tab - xamarin

Question

I implemented a tabbed application with Xamarin.Android using TabHost and MvxTabsFragmentActivity.
I want to refresh the current tab when clicking on it the second time.
Is there any method like OnTabReselected from Android?
That's how I am creating the tabs, using TabHost:
<TabHost android:id="#android:id/tabhost"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/white">
<LinearLayout android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="7dp"
android:background="#drawable/gradient_border_top"
android:orientation="horizontal" />
<TabWidget android:id="#android:id/tabs"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="56dp"
android:layout_weight="0"
android:background="#color/white" />
<FrameLayout android:id="#android:id/tabcontent"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="0" />
</LinearLayout>
</TabHost>
And MainView:
[Activity(Theme = "#style/MyTheme", ScreenOrientation = ScreenOrientation.Portrait, WindowSoftInputMode = SoftInput.AdjustPan)]
public class MainView : MvxTabsFragmentActivity
{
public MainView() : base(Resource.Layout.main_layout, Resource.Id.actualtabcontent)
{
}
private static TabHost TabHost { get; set; }
public override void OnTabChanged(string tag)
{
var pos = TabHost.CurrentTab;
var tabView = TabHost.TabWidget.GetChildTabViewAt(pos);
tabView.FindViewById<ImageView>(Resource.Id.tabImage)
.SetColorFilter(new Color(ContextCompat.GetColor(Application.Context, Resource.Color.tabColorSelected)));
tabView.FindViewById<TextView>(Resource.Id.tabTitle)
.SetTextColor(new Color(ContextCompat.GetColor(Application.Context, Resource.Color.tabColorSelected)));
for (var i = 0; i < TabHost.TabWidget.ChildCount; i++)
{
if (pos != i)
{
var tabViewUnselected = TabHost.TabWidget.GetChildTabViewAt(i);
tabViewUnselected.FindViewById<ImageView>(Resource.Id.tabImage)
.SetColorFilter(new Color(ContextCompat.GetColor(Application.Context, Resource.Color.tabColor)));
tabViewUnselected.FindViewById<TextView>(Resource.Id.tabTitle)
.SetTextColor(new Color(ContextCompat.GetColor(Application.Context, Resource.Color.tabColor)));
}
}
base.OnTabChanged(tag);
}
}
// This is where I add all 4 tabs
protected override void AddTabs(Bundle args)
{
AddTab<TrackHomeView>(
args,
Mvx.IoCProvider.IoCConstruct<TrackHomeViewModel>(),
CreateTabFor(((int)TabIdentifier.TrackTab).ToString(), Resource.Drawable.ic_track_icon, Strings.Track));
AddTab<SendView>(
args,
Mvx.IoCProvider.IoCConstruct<SendViewModel>(),
CreateTabFor(((int)TabIdentifier.SendTab).ToString(), Resource.Drawable.ic_send_icon, Strings.Send));
if (MainViewModel.IsUserLoggedIn())
{
AddTab<ProfileView>(
args,
Mvx.IoCProvider.IoCConstruct<ProfileViewModel>(),
CreateTabFor(((int)TabIdentifier.ProfileTab).ToString(), Resource.Drawable.ic_profile_icon, Strings.Profile));
}
else
{
AddTab<CreateAccountView>(
args,
Mvx.IoCProvider.IoCConstruct<CreateAccountViewModel>(),
CreateTabFor(((int)TabIdentifier.ProfileTab).ToString(), Resource.Drawable.ic_profile_icon, Strings.Profile));
}
AddTab<MoreView>(
args,
Mvx.IoCProvider.IoCConstruct<MoreViewModel>(),
CreateTabFor(((int)TabIdentifier.MoreTab).ToString(), Resource.Drawable.ic_more_icon, Strings.More));
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
TabHost = FindViewById<TabHost>(global::Android.Resource.Id.TabHost);
TabHost.TabWidget.SetDividerDrawable(null);
TabHost.Setup();
}
I added only relevant code.
The tabs are created using TabHost, and the Activity is inherited from MvxTabsFragmentActivity.

Answer 1

You can inherit the ActionBar.ITabListener interface in your TabHost's MvxTabsFragmentActivity and then you can get the events that you need.
public class MainActivity : MvxTabsFragmentActivity, ActionBar.ITabListener
{
public void OnTabReselected(ActionBar.Tab tab, FragmentTransaction ft)
{
// Optionally refresh/update the displayed tab.
Log.Debug(Tag, "The tab {0} was re-selected.", tab.Text);
}
public void OnTabSelected(ActionBar.Tab tab, FragmentTransaction ft)
{
// Display the fragment the user should see
Log.Debug(Tag, "The tab {0} has been selected.", tab.Text);
}
public void OnTabUnselected(ActionBar.Tab tab, FragmentTransaction ft)
{
// Save any state in the displayed fragment.
Log.Debug(Tag, "The tab {0} as been unselected.", tab.Text);
}
...