When Android Data./data no data,

1 if the D:\AndroidDevp\adt-bundle-windows-x86_64-20131030\sdk\platform-tools is set in the environment variable, direct cmd is possible,

If you do not set an environment variable, you need to navigate to this directory

2 If you want to read a database of SQLite under an item, such as database_name, you need to navigate to the database directory

Navigate to the directory as

ADB shell
Su
chmod 777/data
chmod 777/data/data
chmod 777/data/data/cn.itcast.sqlite
chmod 777/data/data/cn.itcast.sqlite/databases

3 I have spent a few days of self-study to understand, .........

When Android Data./data no data,