Android Architecture Components

Back to Home

01. Intro
02. ToDo List App
03. Intro to Room
04. Exercise: Creating an Entity
05. Column Name
06. Creating a DAO
07. Creating the Database
08. Type Converters
09. Quiz: I hereby promise…
10. Exercise: Save Task
11. Exercise: Query all Tasks in MainActivity
12. Threads and Runnables
13. Exercise: Executors
14. Exercise: Delete Task
15. Queries with Parameters
16. Exercise: Update Task
17. Re-query for nothing
18. LiveData and the Observer Pattern
19. Exercise: Adding LiveData
20. Exercise: Adding LiveData to AddTaskActivity
21. ViewModel
22. Exercise: Adding the ViewModel
23. Exercise: Adding the ViewModel to AddTaskActivity
24. A “Lifecycle” Surprise
25. LifecycleOwners and LifecycleObservers
26. The Repository
27. Recap

Back to Home

17. Re-query for nothing

ANDFUN AAC L115 SC Requery For Nothing

Instructor notes:

Re-querying to get the same data over and over is inefficient and generates an unnecessary waste of battery.

udacimak v1.6.6