public override bool OnOptionsItemSelected(IMenuItem item)
{
switch (item.ItemId)
{
case Resource.Id.home:
{
var upIntent = NavUtils.GetParentActivityIntent(this);
if (NavUtils.ShouldUpRecreateTask(this, upIntent))
{
// This activity is NOT part of this app's task, so create a new task
// when navigating up, with a synthesized back stack.
Android.Support.V4.App.TaskStackBuilder.Create(this).
AddNextIntentWithParentStack(upIntent).StartActivities();
}
else
{
// This activity is part of this app's task, so simply
// navigate up to the logical parent activity.
NavUtils.NavigateUpTo(this, upIntent);
}
}
return(true);
}
return(base.OnOptionsItemSelected(item));
}
public override bool OnOptionsItemSelected(Android.Views.IMenuItem item)
{
if (item.ItemId == Android.Resource.Id.Home)
{
// This is called when the Home (Up) button is pressed in the action bar.
// Create a simple intent that starts the hierarchical parent activity and
// use NavUtils in the Support Package to ensure proper handling of Up.
var upIntent = new Intent(this, typeof(MainActivity));
if (NavUtils.ShouldUpRecreateTask(this, upIntent))
{
// This activity is not part of the application's task, so create a new task
// with a synthesized back stack.
TaskStackBuilder.Create(this)
// If there are ancestor activities, they should be added here.
.AddNextIntent(upIntent)
.StartActivities();
this.Finish();
}
else
{
// This activity is part of the application's task, so simply
// navigate up to the hierarchical parent activity.
NavUtils.NavigateUpTo(this, upIntent);
}
return(true);
}
return(base.OnOptionsItemSelected(item));
}
public static void NavigateUp(Activity activity, Bundle extras = null)
{
Intent upIntent = NavUtils.GetParentActivityIntent(activity);
if (upIntent != null)
{
if (extras != null)
{
upIntent.PutExtras(extras);
}
if (NavUtils.ShouldUpRecreateTask(activity, upIntent))
{
TaskStackBuilder.Create(activity)
.AddNextIntentWithParentStack(upIntent)
.StartActivities();
}
else
{
upIntent.AddFlags(ActivityFlags.ClearTop);
activity.StartActivity(upIntent);
}
}
activity.Finish();
}
public override bool OnOptionsItemSelected(IMenuItem item)
{
switch (item.ItemId)
{
case Android.Resource.Id.Home:
// Some small additions to handle "up" navigation correctly
var upIntent = NavUtils.GetParentActivityIntent(Activity);
upIntent.AddFlags(ActivityFlags.ClearTask);
// Check if up activity needs to be created (usually when
// detail screen is opened from a notification or from the
// Wearable app
if (NavUtils.ShouldUpRecreateTask(Activity, upIntent) ||
Activity.IsTaskRoot)
{
// Synthesize parent stack
Android.App.TaskStackBuilder.Create(Activity)
.AddNextIntentWithParentStack(upIntent)
.StartActivities();
}
if (Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.Lollipop)
{
// On Lollipop+ we finish so to run the nice animation
Activity.FinishAfterTransition();
return(true);
}
// Otherwise let the system handle navigating "up"
return(false);
}
return(base.OnOptionsItemSelected(item));
}
public override bool OnSupportNavigateUp()
{
Android.Content.Intent upIntent = NavUtils.GetParentActivityIntent(this);
if (upIntent == null)
{
NavUtils.NavigateUpFromSameTask(this);
return(true);
}
if (NavUtils.ShouldUpRecreateTask(this, upIntent))
{
// this activity is not part of this app's task
global::Android.Support.V4.App.TaskStackBuilder.Create(this).AddNextIntentWithParentStack(upIntent).StartActivities();
}
else
{
// this activity is part of this app's task
NavUtils.NavigateUpTo(this, upIntent);
}
return(true);
}
public override bool OnOptionsItemSelected(IMenuItem item)
{
switch (item.ItemId)
{
case Android.Resource.Id.Home:
var intent = NavUtils.GetParentActivityIntent(this);
if (NavUtils.ShouldUpRecreateTask(this, intent))
{
//This activity is not part of the app's tasks, so create new when navigating
Android.Support.V4.App.TaskStackBuilder.Create(this).
AddNextIntentWithParentStack(intent)
.StartActivities();
}
else
{
NavUtils.NavigateUpTo(this, intent);
}
break;
}
return(base.OnOptionsItemSelected(item));
}
public virtual bool SupportShouldUpRecreateTask(Intent targetIntent)
{
return(NavUtils.ShouldUpRecreateTask(this, targetIntent));
}