这个错误怎么回事

Question

Failed to install HelloAndriod.apk on device 'emulator-5554': device not found
[2011-10-17 22:22:07 - HelloAndriod] com.android.ddmlib.InstallException: device not found
[2011-10-17 22:22:07 - HelloAndriod] Launch canceled!

Answer 1

是模拟器 错误成这样了Can't connect to activity manager

Answer 2

Can't connect to activity manager; is the system running?