[android-developers] Re: 90 Degrees Radial Gradient

On Sep 9, 1:45 pm, sposnjak <simon.posn...@gmail.com> wrote:
> Hi all!
>
> I am working on a custom View that shows a (round) gauge. I would like
> to make the background of the scale to go from green to yellow to red
> (270 degree scale) to black. The problem I am facing is that I can not
> figure out how to make a 90 degree radial gradient - to be specific I
> would like to draw a gradient that goes from green to yellow radially
> in 90 degrees (and then from yellow to red (in 90 degrees) and from
> red do back (again in 90 degrees)). My current code looks like:
>
> canvas.drawOval(scaleRect, scalePaint);
>
> canvas.save(Canvas.MATRIX_SAVE_FLAG);
> canvas.rotate(-135, 0.5f, 0.5f);
>
> paintSection.setShader(new RadialGradient(0.0f, 0.0f, 1.0f,
> Color.GREEN, Color.YELLOW, Shader.TileMode.REPEAT));
> canvas.drawArc(scaleRect, -90, 90, true, paintSection);
>
> canvas.rotate(90, 0.5f, 0.5f);
>
> paintSection.setShader(new RadialGradient(0.0f, 0.0f, 1.0f,
> Color.YELLOW, Color.RED, Shader.TileMode.MIRROR));
> canvas.drawArc(scaleRect, -90, 90, true, paintSection);
>
> canvas.rotate(90, 0.5f, 0.5f);
>
> paintSection.setShader(new RadialGradient(0.0f, 0.0f, 1.0f, Color.RED,
> Color.BLACK, Shader.TileMode.MIRROR));
> canvas.drawArc(scaleRect, -90, 90, true, paintSection);
>
> canvas.restore();
>
> and does not produce the required look. Thank you in advance.
>
> Regards Simon

Hi,

What about using this ctor:

RadialGradient (float x , float y,
float radius, int[] colors, float[]
positions , Shader. TileMode tile )

pskink

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