adb backup [-apk] [-shared] [-system] [-all] -f file.backup
# -apk -- Include APK from Third partie's applications
# -shared -- Include removable storage
# -system -- Include system Applciations
# -all -- Include all the applications
adb shell pm list packages -f -3 #List packages
adb backup -f myapp_backup.ab -apk com.myapp # backup on one device
adb restore myapp_backup.ab # restore to the same or any other device