Using ABExtDrawing lib by @alwaysbusy to draw arc with rounded cap. Android and this lib provides sweep gradient. However the sweep starts from 3:00 direction so may need rotation for certain angles.
Erel has one based on BitmapCreator which is nice as it is B4X, this one is B4A only (B4J version here). Hope it is still useful for someone to make progress bar or knob control view.
Erel has one based on BitmapCreator which is nice as it is B4X, this one is B4A only (B4J version here). Hope it is still useful for someone to make progress bar or knob control view.
B4X:
Sub Globals
Dim Aed As ABExtDrawing
Dim Cv As Canvas
Dim Arc As ABRectF
Dim Apt As ABPath
Dim Apa As ABPaint
Private Panel1 As Panel
End Sub
Sub Activity_Create(FirstTime As Boolean)
Activity.LoadLayout("Layout")
Cv.Initialize(Panel1)
Arc.Initialize(100,100,Panel1.Width-100, Panel1.Width-100)
Apt.Initialize
Apt.arcTo(Arc, 30, 260)
Apa.Initialize
Apa.SetAntiAlias(True)
Apa.SetStrokeWidth(80)
Dim c(2) As Int
c(0) = Colors.Yellow
c(1) = Colors.Red
Apa.SetSweepGradient(1, Panel1.Width/2.0, Panel1.Width/2.0, c, Null)
Apa.DoShaderSingle(1)
Apa.SetStrokeCap(Apa.Cap_ROUND)
Apa.SetStyle(Apa.Style_STROKE)
Aed.drawPath(Cv, Apt, Apa)
End Sub