Android Question GradientDrawable with 3 colors

[DavideV]

Hi developers,
for my own colorpicker i need to create a colordrawable for an horizontal bar that shows the picked color as central color , the white color to left and black to right.
As you know the colordrawable uses only 2 colors so i made 2 panels one near the other: the panel to the left shows the picked color gradient to white and the right panel shows the picked color gradient to black (see images)

I would like to make only one panel to let the user choose the final color but i don't know how to do this.
Also a way to merge the 2 gradient into one bitmap/canvas will be good enought, so i'll load the bitmap into one panel.

Thanks in advance
DavideV

 

[LucaMs]

Maybe by entering this code as inline java code:
https://stackoverflow.com/questions...dientdrawable-with-more-than-three-colors-set

[Also, it seems that the original class already requires 3 colors - even though one is optional:
https://developer.android.com/refer...radientDrawable.html#attr_android:centerColor]

 

[Star-Dust]

Do not you think I understand what you want to get?
The bar to increase or decrease the brightness?

 

[klaus]

You can have more than 2 colors in a GradientDrawable!

Sub Globals
    Private pnlTest As Panel
End Sub

Sub Activity_Create(FirstTime As Boolean)
    pnlTest.Initialize("")
    Activity.AddView(pnlTest, 20dip, 20dip, 256dip, 50dip)
  
    Private gdb As GradientDrawable
    Private GradColors(3) As Int = Array As Int(Colors.White, Colors.Red , Colors.Black)
    gdb.Initialize("LEFT_RIGHT", GradColors)
  
    pnlTest.Background= gdb
End Sub

And the result.

 

[Star-Dust]

Interesting, I did not think so. I use another solution, but yours is more interesting

 

[DavideV]

Thanks Klaus, will try this evening

 

[DavideV]

You can have more than 2 colors in a GradientDrawable!

Sub Globals
    Private pnlTest As Panel
End Sub

Sub Activity_Create(FirstTime As Boolean)
    pnlTest.Initialize("")
    Activity.AddView(pnlTest, 20dip, 20dip, 256dip, 50dip)
  
    Private gdb As GradientDrawable
    Private GradColors(3) As Int = Array As Int(Colors.White, Colors. , Colors.Black)
    gdb.Initialize("LEFT_RIGHT", GradColors)
  
    pnlTest.Background= gdb
End Sub

And the result.

View attachment 56690

Works fine, i didn't know that it support more colors.
Thanks again