Saving Data on Android

put
 into the 
ContentValues
 object 
before it is then handed to another method, which will resolve the content and 
perform the database operation.
Simply put, ContentValues are similar to a 
Map
 structures and are used to define the 
columns and the values to be used in database operations. As such, you'll use them 
to insert data into the database and update existing models if needed.
Saving Data on Android
Chapter 3: SQLite Database
raywenderlich.com
55

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Adding a TODO
Add the following code in the 
createToDo
 function, to insert a TODO into the table:
// 1
 
val
 db: SQLiteDatabase = writableDatabase 
// 2
 
val
 values = ContentValues() 
// 3
 
values.put(KEY_TODO_NAME, toDo.toDoName) 
values.put(KEY_TODO_IS_COMPLETED, toDo.isCompleted) 
// 4
 
db.insert(TABLE_NAME, 
null
, values) 
// 5
 
db.close()
With the above, you:
1. Get a writeable instance of the database and store it in the 
db
 value.
2. Create an object of the 
ContentValues
 class called 
values
.
3. Take the text of the TODO from the 
toDo
 object's 
toDoName
 field and put it into 
values
, for the 
KEY_TODO_NAME
 key, using 
toDoName
 as the pair's value.
4. Put the key-value pair for the 
isCompleted
 field into the 
value
 object, as well.
5. Close the database, to avoid potential leaks.