创建用于创建并连接到Android Sqlite3数据库的Java jar文件

Question

I am creating a java jar file that will be used to connect to different databases so this library can be used in many apps and support different databases. ie Sqlite3, MySQL, Oracle, etc.

Currently I want to support Android first and want my jar file to connect to Android's builtin Sqlite3 database.

The customer will use are jar file and call the functions in it to create, update, and query the database. So they won't have to use any or Androids API.

However, I am confused about a few things:

1) Can a java jar file create and connect to Android Sqlite3 database without importing the android.database.sqlite.* API. Just using Java's standard API?
2) As all apps are created and ran in their own sandbox on Android, will the database be created and saved to the apps sandbox for security reasons?

Many thanks for any suggestions,

Answer 1

Unfortunately, if you want to create and connect to the built-in android sqlite database you must import android.database.sqlite.*

About the other section of the question, i'm not sure if it's depends on the first one or not but if you use the android api to create it, sure it will be in the application private folder

Answer 2

Can a java jar file create and connect to Android Sqlite3 database without importing the android.database.sqlite.* API. Just using Java's standard API?

sqlite databases are just files. You can read and write files with regular Java APIs.

Though for database use it's better to use the sqlite3 C library for reading and writing the files. Android provides one Java wrapper for it; there are a number of other wrappers as well, including JDBC ones.

As all apps are created and ran in their own sandbox on Android, will the database be created and saved to the apps sandbox for security reasons?

By default the Android database wrapper puts database files in the app's private data directory. It's not accessible to other apps without shared user id or root.