latest year/two I comletely away from android development, so i need someone, who will take care of this library

Generally used classes by Daniel Nilsson. ColorPickerPreference class by Sergey Margaritov. Packed by Sergey Margaritov.

• Color Area
• Hue Slider
• Alpha Slider (disabled by default)
• Old & New Color
• Color Preview in Preferences List

Tested with APIv7, but maybe will work with early versions

You can see some tests inside

<net.margaritov.preference.colorpicker.ColorPickerPreference
 android:key="color1"
 android:title="@string/color1_title"
 android:summary="@string/color1_summary"
 android:defaultValue="@color/pumpkin_orange" <!-- integer resources are also accepted -->
 alphaSlider="true" <!-- enable alpha slider via XML -->
/>

To enable Alpha Slider in your code use function:

setAlphaSliderEnabled(boolean enable)

• https://github.com/attenzione/android-ColorPickerPreference/raw/master/screen_1.png
• https://github.com/attenzione/android-ColorPickerPreference/raw/master/screen_2.png