akmalrusli363/android-kotlin-fundamentals-lesson-06

Android Kotlin Fundamentals Lesson 06: Room database and Coroutines

Android Kotlin Fundamentals Course 6: Room database and Coroutines - TrackMySleepQuality

A project result of Android Kotlin Fundamentals Codelab 6: Room database & Coroutines which the starter code deployed from TrackMySleepQuality-Starter within GitHub repository google-developer-training/android-kotlin-fundamentals-starter-apps

Lesson Summary

Lesson 6 teaches you how to use the Room database library. Room takes care of many of the chores of setting up and configuring a database, and simplifies the code for interacting with the database. You learn how to use Kotlin coroutines to move database operations away from the main thread, and you learn more about using ViewModel and LiveData with app navigation.

Introduction

TrackMySleepQuality is an app for recording sleep data for each night. You can record a start and stop time, assign a quality rating, and clear the database.

In this codelab, working from this starter app, you will implement the Room database that holds the sleep data. You will then use instrumented tests to verify that this backend works.

Pre-requisites

You need to know:

• Building a basic user interface (UI) for an Android app, using an activity, fragments, and views.
• Navigating between fragments and using Safe Args (a Gradle plugin) to pass data between fragments.
• View models, view-model factories, and LiveData and its observers. These Architecture Components topics are covered in an earlier codelab in this course.
• A basic understanding of SQL databases and the SQLite language.

Getting Started

1. Download and run the app.

License

Copyright 2019 Google, Inc.

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.