[FIXED] How do I pull a room db from my device?

Issue

I'm trying a little with the new room database helpers from Android.

So I have created all classes for the entries and the DAO as well as for the database itself.

Then I created an instance of the db in my MainActivity:

mDb = myDatabase.getDatabase(getApplication());

But when is the "physical" db-file created on the Android device?

What I want to do is to copy that file to my PC and open it in an SQLITE-mnager in oder to fill the empty database in a more comfortable way.

But I do not know where to fid it or if the file is already been created by my app (the app already produced the JSON schema file, so I expected that the db also exists).

So how do I know if it exists andhow I can pull it from my device to my PC?

Solution

1) It is created when you run any type of query for first time, so for example invoke any method from your DAO annotated with @Query, @Insert or other

2) Open Device File Explorer (you will find it on the right, down side of Android Studio) and then navigate to: data/data/YOUR_PACKAGE_NAME/databases/ where your database file will be stored, with the name that you specify in Room.databaseBuilder method. From this place you can right click on the file and copy it to your PC

Answered By - Michał Baran
Answer Checked By - Katrina (JavaFixing Volunteer)