Implementation " :extensions:1.1.1"ĪnnotationProcessor " :compiler:1.1.1" Implementation " :runtime:1.1.1"ĪnnotationProcessor " :compiler:1.1.1"ĪndroidTestImplementation " :testing:1.1.1" // Lifecycle components This diagram shows a basic form of this architecture. This app focuses on a subset of the components, namely LiveData, ViewModel and Room. To make red round Textview with numbers, we need round_shape.xml: You can add and remove data from database and display it on the screen, like you want. Let's start! Create a new project in Android studio (I used version 3.2.1) with empty activity or you can download the source files and choose: File-New-Import project. The new instance of the owner will just re-connect to the existing ViewModel. In other words, this means that a ViewModel will not be destroyed if its owner is destroyed for a configuration change (e.g. It also handles the communication of the Activity / Fragment with the rest of the application. ViewModel is a class that is responsible for preparing and managing the data for an Activity or a Fragment. You can use one of our standard layout managers (such as LinearLayoutManager or GridLayoutManager), or implement your own. The RecyclerView fills itself with views provided by a layout manager that you provide. The overall container for your user interface is a RecyclerView object that you add to your layout. In the RecyclerView widget, several different components work together to display your data (list of objects). Finally, the app uses an entity to get and set values that correspond to table columns within the database. The app then uses each DAO to get entities from the database and save any changes to those entities back to the database. The app uses the Room database to get the data access objects, or DAOs, associated with that database. Room provides an abstraction layer over SQLite to allow fluent database access while harnessing the full power of SQLite.
#ANDROID STUDIO FRAGMENT ONCLICK LISTENER ABSTRACT CALLING UPDATE#