localuser:~ localhost$ adb shell
shell@android:/ $ su
// 数据库复制到 Download 下
shell@android:/ # cp
/data/data/your.package.name/databases/your_database.db
/mnt/shell/emulated/0/Download/
shell@android:/ # exit
shell@android:/ $
exit
// 数据库导出到 D 盘
localuser:~ localhost$ adb pull
/mnt/shell/emulated/0/Download/your_database.db
D:\your_database.db