The problem is that you have 4 imageviews with the same eventname.
Change your code like this:
B4X:
Sub imageview_Click
Dim iv As ImageView = Sender
anim.InitializeAlpha("animAlpha" , 1 , 0.7 )
anim.Duration = 600
anim.RepeatCount = -1
anim.Start(iv)
End Sub
thanks derez
a new question : I need run an animation , how can I run only one animation?(when I touch all imageview , I see animation run at all objects ( imageview )
I will only an animation run at last touch and stop other animation