![]() forEach (action: (Map.Entry) -> Unit): Unit // for Map public inline fun Iterable. ![]() Method signature: forEach // for Collection public inline fun Map. Result of my room database android example. Kotlin provides 2 methods to perform the given action on each element: onEach and forEach. To do that you can add allowMainThreadQueries() on the builder. You can use the same for testing but should avoid. There is one more option, which allows you to do the operation on the main thread. You can avoid that by using AsyncTask or Handler or Rxjava with IO schedulers or any other options which puts the operation on any other thread. ![]() ![]() am going to create a sample app for user management using the room database in kotlin. each Query and Entity is checked at the compile time. By default, Room keeps a check of that and doesn’t allow operations on the main thread as it can makes your UI Not responding. Compile-time verification of SQL queries. If you try running the above code with the created database above, your app will crash as the operation performed is on the main thread. We don’t require to write whole queries now we need to make a method and annotate with specific annotations Insert - Used to insert record into Room - Used to delete record from Room - Used to update record in Room Query - Used to enter the Query like (SELECT FROM*)” interface UserDao Data Access ObjectĪn Interface where we put all our SQL queries. = "user") data class = true)var userId: Int? = null,val userName: String, var location: String, val email: String) 2. you have to annotate “ ” to a class and name of the class becomes table name and, data members becomes the name of the columns. Representation of table and columns become very easy. There Are Basically 3 Major Components In Room.
0 Comments
Leave a Reply. |