1. https://www.opengl.org/. https://www.opengl.org/.
2. http://opencv.org/platforms/android.html. http://opencv.org/platforms/android.html.
3. http://developer.android.com/guide/topics/resources/drawable-resource.html. http://developer.android.com/guide/topics/resources/drawable-resource.html.
4. https://developer.android.com/about/versions/android-5.0.html. https://developer.android.com/about/versions/android-5.0.html.
5. http://en.wikipedia.org/wiki/OLED. http://en.wikipedia.org/wiki/OLED.