A Simple Android Activity which uses a seekbar to modify the text view colors created using a linear layout.
You can check the screencast of this application. https://www.youtube.com/watch?v=ZChnMYICsl8
This screencast was created using gtk-recordmydesktop. Installation on Ubuntu -
$ sudo apt-get install gtk-recordmydesktop
The entire application was built using Android Studio and tested on an emulator using Nexus 5 API Level 18 configuration.