I use the following code: 
	
	
	
	
	
	
	
		
			
			
			
			
			
		
	
	
	
		
	
	
		
	
and I don't know how I can capture the Click on the back icon event. Thank you!
			
			
			
				B4X:
			
		
		
		Dim bd As BitmapDrawable
bd.Initialize(LoadBitmap(File.DirAssets, "stop.png"))
bar.NavigationIconDrawable = bd
ToolbarHelper.Initialize
ToolbarHelper.ShowUpIndicator = True
bar.InitMenuListener