This video show how to control Arduino 101 with your Android phone. Just drag the slider left to right to see the LED fading!
Notice: Android app is done by App Inventor 2, the graphical IDE of Android, and the communication is through BLE (Bluetooth Low Energy).
Source code and tutorial: http://www.appinventor.tw/ble_lesson2...
More topics: http://www.appinventor.tw ; http://www.cavedu.com