Saving Data on Android

get the list of all the questions
 currently stored in your 
database.
• You will also need to be able to 
create new questions
 when your app is created.
• Finally, you will also have to 
delete questions
 at some point.
With the above in mind, create a DAO in your project that perform 
CREATE
, 
READ
, 
and 
DELETE
 queries in your database. You will see how easy it is to create DAOs in 
Room.
Saving Data on Android
Chapter 8: The DAO Pattern
raywenderlich.com
133

---

Create a new interface under the 
db
 package and name it 
QuizDao
. To turn your new 
interface into a DAO, simply add the 
@Dao
 annotation like below:
@Dao
 
interface
 
QuizDao
 { 
}
Now, add the following code to the interface:
@Insert(onConflict = OnConflictStrategy.REPLACE)
 
fun
 
insert
(question: Question)
 
 
@Insert(onConflict = OnConflictStrategy.REPLACE)
 
fun
 
insert
(answer: Answer)
The 
@Insert
 annotation is a shortcut that allows you to automatically create an 
INSERT INTO
 query, that creates a new record in the appropriate table, with the 
object passed as a parameter. In this case, the first method is going to create a new 
record in your