android-failed-to-install--apk-on-real device-null-error

I have similar problem to Android Failed to install HelloWorld开发者_运维技巧.apk on device (null) Error ,but I cannot start my app only on real device. On emulator all is OK. Maybe someone faced with this problem and found a good solution. Thanks in advance.

Go to Settings > Applications> Development and uncheck "USB Debugging". Now check it again. This should solve your problem.