Abstract: Android is an open source smart phone operating system, which is launched by Uoogle. More and more people spend time in researching and using it. The paper built Android application development platform, and realized Android application program. The work is from overall design to detailed design. The design of the communication helper software is based on Android. It has the function of grouping the contacts stored in the phone, storing contact detail information, and quick phone calls, SMS, cmail sending. I}he interface design is completed through the Android UI, and the program is debuged by virtual machine until the code is passed.

Key words: Smart phone operating systems, I}ransplantation, Android user interface