我多次遇到过这个问题.一些解决方案是:
解决方案1:
the emulator
Select & Right Click on Android Project
Run Configurations
Go to tab Target
Enable option Wipe User Data on Emulator launch parameters
Run Application
解决方案2:
Run Emulator
Keep the Emulator, (no matter same error occurs)
Make Sure the Home Screen of Emulator is appeared
go to Window -> Show Perspective -> DDMS --> In Devices Panel -> on Corner Drop Down Menu
Reset adb
解决方案3:
Reset adb manually or using the command line.
可能对新用户有帮助.