Android color picker - updating color array

Question

I\'m trying to create a color picker for Android that looks like a minimalistic version of Gimp\'s. So, it has a hue slider and a rectangle with saturation/value variants of

Answer 1

OpenIntents has a very nice color picker you can use. It can be installed as an independent app and launched with Intents.

• Code: http://code.google.com/p/openintents/source/browse/#svn/trunk/ColorPicker
• Screenshots/download: http://www.openintents.org/en/colorpicker
• Intent specification: http://www.openintents.org/en/node/670

Answer 2

One possibility is to pre-create the rectangles on your developer PC for each slider position, embed them as resources, and then swap in the right one when the slider changes. This may make for a portly application, but it will be nice and quick.

I have not dealt with the 2D graphics API much, so I don't know if there are other possibilities (e.g., color matrices).

Answer 3

You can create the rectangle with saturation/value variants that change according to the selected hue, by drawing the rectangle with LinearGradients.

You can incorporate the code here: http://code.google.com/p/android-color-picker/ into your application. Seems that this is what you want.

Answer 4

Can this be applied to an image color picker as well?

Use case:

1. Select a particular pixel on an image.
2. The pixel selected generates a color on a rectangle shape.
3. Perhaps generating color codes for the pixel selected?