GradientDrawable not provided

[Dominex]

There is a way to make the effect GradientDrawable from the center to the outside and vice versa? In the classic options is not provided.

 

[thedesolatesoul]

The argument Colors is an array so you can use more than 2 colors to create the gradient.

Dim Gradient1 As GradientDrawable
Dim Clrs(3) As Int
Clrs(0) = Colors.Black
Clrs(1) = Colors.White
Clrs(2) = Colors.Black
Gradient1.Initialize("TOP_BOTTOM", Clrs)

 

[Dominex]

The argument Colors is an array so you can use more than 2 colors to create the gradient.

Dim Gradient1 As GradientDrawable
Dim Clrs(3) As Int
Clrs(0) = Colors.Black
Clrs(1) = Colors.White
Clrs(2) = Colors.Black
Gradient1.Initialize("TOP_BOTTOM", Clrs)

Thanks, this is very interesting, unfortunately not fully resolve my problem. I need that the Gradient is directed from the center towards all directions.

 

[thedesolatesoul]

I see you want a Radial Gradient?
I am sure it is possible (GradientDrawable | Android Developers) even with reflection.

 

[Dominex]

I see you want a Radial Gradient?
I am sure it is possible (GradientDrawable | Android Developers) even with reflection.

Yes, exactly, it is the Radial Gradient.
I think it is possible from what I read, remains to understand how to do.

 

[Dominex]

Erel in another post has provided the answer. Thanks Erel.

Sub Activity_Create(FirstTime As Boolean)
    Dim GD As GradientDrawable
    GD.Initialize("TOP_BOTTOM", Array As Int(Colors.White, Colors.Black))
    Activity.Background = GD
    SetRadialGradient(GD, Activity.Height/2)
End Sub

Sub SetRadialGradient(GD As GradientDrawable, radius As Float)
    Dim r As Reflector
    r.Target = GD
    r.RunMethod2("setGradientType", 1, "java.lang.int")
    r.RunMethod2("setGradientRadius", radius, "java.lang.float")
End Sub

 

[Dominex]

The Radial Gradient works well, but now I need help to make the Rectangle Gradient. I'm trying with Reflection Library but I can not. :BangHead:

 

[thedesolatesoul]

What do you need?
Consider adding:

r.RunMethod2("setShape", 0, "java.lang.int")

 

[Dominex]

What do you need?
Consider adding:

r.RunMethod2("setShape", 0, "java.lang.int")

Already tried without success.

 

[klaus]

Attached you find a small demo program for GradientDrawables you can play with.
You can change :
- corner radius
- gradiend shape
- gradient type
- gradient orientation
- gradient radius
- gradient center

About Rectangle Gradient, if you expect a gradient with a rectangular shape (rectangles changing colors) this is not supported in Android.

Best regards.

EDIT: 2012.12.18
updated the zip file

 

[NJDude]

Cool.

A couple of things:

1- Selecting "Line" crashes the app with a java.lang.NullPointerException error.

2- Selecting "Rings" shows nothing.

I tried that on JB 4.2.1

Nice code by the way.

 

[klaus]

Hi NJDude,
Thanks for the bug report.
It seems that LINE and RING are not supported.
Added a ToastMessage.
Updated the zip file in post #1.

Best regards.

 

[Dominex]

Thanks Klaus for your good example, but unfortunately I have finally realized that I can not do what I wanted (see image below).