Android Question Rotate Animation (Lucky wheel)

[Douglas Farias]

Hi.
how can i rotate a imageview on b4a to make a lucky wheel?
I m tryed with canvas and with animation lib but not success.

With Animation lib

anime.InitializeRotateCenter("",0,360,cvroleta)
anime.RepeatCount = -1
anime.Duration = 1000
anime.Start(cvroleta)

Problem
There is an effect of going slowly stopping.
Dont rotate for ever, have a effect when will start again. like fade in and fade out.



With Canvas and Timer

#Region  Project Attributes
    #ApplicationLabel: Roleta
    #VersionCode: 1
    #VersionName:1
    #SupportedOrientations: portrait
    #CanInstallToExternalStorage: False
#End Region

#Region  Activity Attributes
    #FullScreen: False
    #IncludeTitle: False
#End Region

Sub Process_Globals
    Private t As Timer
    Private b As Bitmap
End Sub

Sub Globals
    Private angulo As Int
    Private rec As Rect
    Private cvroleta As Canvas
    Private pcvroleta As Panel
End Sub

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("1")
   
    b.Initialize(File.DirAssets, "valores.png")
   
    pcvroleta.Width = b.Width
    pcvroleta.Height = b.Height
   
   
    cvroleta.Initialize(pcvroleta)
    rec.Initialize(0,0,b.Width,b.Height)
    cvroleta.DrawBitmap(b,Null,rec)
    t.Initialize("t",1)
    angulo = 0
    t.Enabled = True

End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub


Sub t_tick
    angulo = angulo + 1
    If angulo = 360 Then
        angulo=0
    End If
    cvroleta.DrawBitmapRotated(b,Null,rec,angulo)
    Activity.Invalidate
End Sub

Problem
With canvas its very slow for Android, on B4J its ok with a timer and a simple DrawImageRotated
But on b4a the rotate animation with a timer its very slow, debug and release.
The timer its with 1ms and the animation its very slow.

Here a example for b4j (very slow for android)
https://www.b4x.com/android/forum/threads/lucky-wheel-source-code.66638/


How can i make view rotate for ever? canvas dont work and animation have end effect.

Thx

 

[Jeffrey Cameron]

Informatix's Animation Plus library should be able to do what you want I think: https://www.b4x.com/android/forum/threads/lib-animationplus.21313/

 

[LucaMs]

I used a noaObjectAnimator object (NineOldAndroids) for my lucky wheel.

 

[Douglas Farias]

Many thx
i will try.