Android Question Rotate a image without repeat animation

Sub Process_Globals
    Private fx As JFX
    Private MainForm As Form
    Private Canvas1 As Canvas
    Private Button1 As Button
    Private b As Image
    Private t As Timer
    Private angle As Int
End Sub

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    MainForm.SetFormStyle("UNIFIED")
    MainForm.RootPane.LoadLayout("1") 'Load the layout file.
    MainForm.Show
   
    b.Initialize(File.DirAssets, "circle_img.png")
   
    Canvas1.DrawImage(b,0,0,b.Width,b.Height) ',0,0,Canvas1.Width,Canvas1.height)
    t.Initialize("t",10)
    angle = 0
   
End Sub

Sub t_tick
    angle = angle + 1
    If angle = 360 Then angle=0
    Canvas1.DrawImageRotated(b,0,0,b.Width,b.Height, angle)
End Sub

Sub Button1_Action
    If t.Enabled Then
      t.Enabled=False
    Else 
      t.Enabled=True           
    End If
   
End Sub