android - package name not corresponding to file path? -

so while trying copy google maps sample projects, kept getting error on line

package com.example.mapdemo; 

the error i'm getting is:

package name 'com.example.mapdemo' not correspond file path 'com.example.myname.gps 

i'm relatively new programmer. if explain error means, caused it, , how fix appreciate it. thanks.

if copying complete class project, make sure change package statement match own package name. assume need change first line of class throwing error package com.example.myname.gps