Android is mainly applied in the field of personal smart
moblie devices, and this kind of devices always stored personal
information, such as personal account and password; and smart
phone can be used for paid service such as call and short
message. If operating system is successful attacked the user
must to face the situation that personal information is stolen
and always to pay for economic expense. By the drive of
profits attacks aimed at smart mobile devices developed very
fast. The statistics data shows that in 2012 the count of
malwares aimed at mobile devices increased 700% compared
to 2011, and the 85% target of malware is Android based smart
mobile phone [4] approximately equal to the market share of
Android. This partly caused by the open source character and
its ecosystem also is open; any developpers can develop and
release Android application independently.