Figure
The reason: the project main Activity page newspaper run error because android studio think your project is running on the phone, but you put him up uninstall, but it does not know that your project is still in the process of the main Activity , it can not be installed.
Solution: This open 
, or open cmd command is the same. Run the code Note: [] is the package name com.nf.xxx
adb uninstall com.nf.xxx
After a successful run as follows
However, the installation can be recompiled