I am using an Android Stick (http://www.geekbuying.com/item/Uhost-2-Dual-Core-TV-Box-Mini-PC-Android-4-0-4-RK3066-Cortex-A9-1-6GHZ-1GB-RAM-4G-ROM-with-Bluetooth-WIFI-Skype-XBMC-
Mouse event is managed by the system framework. You cannot control it on Java side.
On the adb shell you can open /dev/input/uevent device to write mouse events include
However, you cannot do it as a normal application, unless you do it on a rooted device, or you can use adb shell to start a daemon service in the background to perform the event writing for your application.