OpenGL ES Real-Time Line Graphing: Beginner Looking for Information

Hi Everyone,

I’m a beginner to android development and have a bit of GUI development OpenGL experience, but this was a while ago and I’m pretty rusty. I’m looking into making a real-time line graphing app, one which could perhaps take input from the microphone or accelerometer of the device and graph it on a simple 2D axis. I would love some information on the basics of OpenGL ES (I already read the android developer guide on OpenGL ES), perhaps something really simple with a concrete example. Even graphing a 2D triangle just to get the process down would be super helpful. Anyone have any links to information on this? I tried using the searchbar but could not find anything that looked like what I want.

I’m using Android Studio 1.5.1 on Windows 7.