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Exercise 12 - Android Room with a View

Project name : E12 Room Word Sample

Purpose

This exercise teaches you how to use Room database and LiveData in Android Application.

Follow Codelabs Android Room with a View material and learn following things:

  • Android Architecture Components
  • Entity
  • DAO
  • Room database
  • Repository
  • ViewModel
  • LiveData

Project name : E12 Room Word Sample

Exercise link : Android Room with a View

Note

This exercise is a little bit hard because it is old but updates frequently... and Android Studio and libraries updates frequently too. But, here are a few more hints:

Just install:

You can make a different layout and styles, you don't need to follow instructions closely. Just add a RecyclerView and Float Action Button to your layout.

If you don't get it working, you can look below build.gradle files. Remember there might be a newer version of dependencies available.

build.gradle (project) 
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// Top-level build file where you can add configuration options common to all sub-projects/modules.
plugins {
    id("com.android.application") version "8.1.0" apply false
    id("org.jetbrains.kotlin.android") version "1.8.0" apply false
}
build.gradle (module) 
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import org.jetbrains.kotlin.kapt3.base.Kapt.kapt

plugins {
    id("com.android.application")
    id("org.jetbrains.kotlin.android")
    id ("kotlin-kapt")
}

android {
    namespace = "com.example.e14roomwordsample"
    compileSdk = 34

    defaultConfig {
        applicationId = "com.example.e14roomwordsample"
        minSdk = 33
        targetSdk = 33
        versionCode = 1
        versionName = "1.0"

        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            isMinifyEnabled = false
            proguardFiles(
                getDefaultProguardFile("proguard-android-optimize.txt"),
                "proguard-rules.pro"
            )
        }
    }
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_17
        targetCompatibility = JavaVersion.VERSION_17
    }
}

dependencies {

    implementation("androidx.core:core-ktx:1.9.0")
    implementation("androidx.appcompat:appcompat:1.6.1")
    implementation("com.google.android.material:material:1.10.0")
    implementation("androidx.constraintlayout:constraintlayout:2.1.4")
    testImplementation("junit:junit:4.13.2")
    androidTestImplementation("androidx.test.ext:junit:1.1.5")
    androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")

    val activity_version = "1.8.0"
    implementation("androidx.activity:activity-ktx:$activity_version")

    val lifecycle_version = "2.6.2"
    // ViewModel
    implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version")
    // ViewModel utilities for Compose
    implementation("androidx.lifecycle:lifecycle-viewmodel-compose:$lifecycle_version")
    // LiveData
    implementation("androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version")
    // Lifecycles only (without ViewModel or LiveData)
    implementation("androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version")
    // Lifecycle utilities for Compose
    implementation("androidx.lifecycle:lifecycle-runtime-compose:$lifecycle_version")

    val room_version = "2.6.0"
    implementation("androidx.room:room-ktx:$room_version")
    kapt("androidx.room:room-compiler:$room_version")


}

Test and push

Test your application in emulator, take screenshots and commit/push your project and screenshots back to JAMKIT/GitLab. Remember move your exercise/issue ticket from Doing to In Review in Issues Board and write your learning comments to issue comments.