Simply connect the black line to ground, the red line to +5v, and the yellow signal line to Arduino pin 5 (or other PWM capable pin, usually marked with a ~ symbol). Here is a diagram of the completed circuit (created with Fritzing):
Next, upload the Arduino sketch to the microcontroller. The sketch uses the Microbridge implementation by Niels Brouwers. Microbridge uses Android Debug Bridge (ABD) forwarding over TCP, rather than the official Google Android ADK. You can checkout the source for the Arduino sketch from Github, or just copy and paste the following into the Arduino IDE.
Always excercise caution when working with electronics. All software is provided on an "as is" basis without warranty of any kind, express or implied. Unless otherwise noted, all code content is licensed under the Apache 2.0 license