[Android][Kotlin] Hilt 종속성 및 사용법 & 간단한 랜덤 색상 뽑기

1. 프로젝트 build.gradle

id 'com.google.dagger.hilt.android' version '2.44' apply false

 

 

2. app 모듈 build.gradle

plugins {
    ...
    
    id 'kotlin-kapt'
    id 'com.google.dagger.hilt.android'
}

android {
    ...
}

dependencies {
    ...

    implementation "com.google.dagger:hilt-android:2.44"
    kapt "com.google.dagger:hilt-compiler:2.44"
}

kapt {
    correctErrorTypes true
}

 

 

3. Application 생성 및 Annotation 추가

@HiltAndroidApp
class RootApplication: Application()

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <application
        android:name=".RootApplication"
        ...>
        
        ...
    </application>
</manifest>

 

 

4. Adapter Interface 생성

interface ColorAdapter { fun randomColor(): Int }

 

 

5. Adapter Impl class 생성

class ColorImpl: ColorAdapter {
    override fun randomColor(): Int {
        val rnd = Random()
        return Color.argb(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256))
    }
}

 

 

6. 객체 연결 및 Module 생성

@Module
@InstallIn(SingletonComponent::class)
class ColorModule {
    @Provides
    @Singleton
    fun getColorAdapter(): ColorAdapter = ColorImpl()
}

 

 

7. 객체 사용

@AndroidEntryPoint
class MainActivity: BaseActivity<ActivityMainBinding>({ ActivityMainBinding.inflate(it) }) {
    @Inject lateinit var colorAdapter: ColorAdapter

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        binding.randomColor.setOnClickListener {
            val randomColor = colorAdapter.randomColor()
            colorUpdate(randomColor)
        }
    }

    private fun colorUpdate(color: Int) {
        binding.colorView.setBackgroundColor(color)
        binding.colorCode.text = String.format("#%06X", 0xFFFFFF and color)
    }
}

 

 

 

## 안드로이드 Hilt 종속성 참고 사이트 ##

https://developer.android.com/training/dependency-injection/hilt-android?hl=ko