Android Question applying gradient to an image

[moster67]

I have previously used gradient applying it directly to the background of an activity.

Now my designer has given me a background-image which I will use as an activity background (or perhaps in an imageview) and he told me to apply a gradient to this background-image. Is it possible to do this? Do I need to use the canvas-object?

Any help/suggestions would be highly appreciated?

 

[Erel]

Do you need to do it at runtime? Will probably be simpler to apply the gradient to the image itself.

 

[moster67]

Will probably be simpler to apply the gradient to the image itself.

I have asked the designer the same question since I cannot understand the advantage of applying it at runtime.

However, if it is possible, I would like to know how to do it. Thanks!

 

[Erel]

It is not possible with the standard Canvas object. There are other drawing libraries that allow you to change the image transparency. I don't think (not sure) that they allow you to apply a gradient. I'm not sure that I understand what the designer means with applying a gradient to an existing image

 

[Informatix]

You should look at the Accelerated Surface library (the TextureBlending demo).