#4: Added WelcomeScreen - BP & NM

app/build.gradle

@@ -46,6 +46,9 @@ android {
             excludes += '/META-INF/{AL2.0,LGPL2.1}'
         }
     }
+    testOptions {
+        unitTests.returnDefaultValues = true
+    }
 }
 
 tasks.dokkaHtml.configure {
@@ -90,4 +93,8 @@ dependencies {
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
     androidTestImplementation "androidx.compose.ui:ui-test-junit4:$compose_version"
     debugImplementation "androidx.compose.ui:ui-tooling:$compose_version"
+
+    //Koin DI
+    implementation "io.insert-koin:koin-android:$koin_version"// Koin main features for Android
+    implementation "io.insert-koin:koin-androidx-compose:$koin_version"// Jetpack Compose
 }

app/src/main/AndroidManifest.xml

@@ -8,7 +8,8 @@
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.Jetflow">
+        android:theme="@style/Theme.Jetflow"
+        android:name=".JetflowApplication">
         <activity
             android:name=".MainActivity"
             android:exported="true"

app/src/main/java/com/wwt/jetflow/AppModule.kt

@@ -0,0 +1,19 @@
+package com.wwt.jetflow
+
+import com.wwt.jetflow.welcome.WelcomeViewModel
+import org.koin.core.component.KoinComponent
+import org.koin.core.context.loadKoinModules
+import org.koin.dsl.module
+
+object AppModule : KoinComponent {
+    fun init(){
+        val welcomeModules = module {
+            single{WelcomeViewModel()}
+        }
+
+        val moduleList = listOf(
+            welcomeModules
+        )
+        loadKoinModules(moduleList)
+    }
+}

app/src/main/java/com/wwt/jetflow/JetflowApp.kt

@@ -0,0 +1,15 @@
+package com.wwt.jetflow
+
+import androidx.compose.runtime.Composable
+import com.wwt.jetflow.welcome.WelcomeScreen
+import com.wwt.jetflow.welcome.WelcomeViewModel
+import org.koin.androidx.compose.inject
+
+@Composable
+fun JetflowApp() {
+    val welcomeViewModel: WelcomeViewModel by inject()
+    WelcomeScreen(
+        state = welcomeViewModel.viewState.value,
+        effectFlow = welcomeViewModel.effect,
+        onEventSent = { event -> welcomeViewModel.setEvent(event) })
+}

app/src/main/java/com/wwt/jetflow/JetflowApplication.kt

@@ -0,0 +1,22 @@
+package com.wwt.jetflow
+
+import android.app.Application
+import org.koin.android.ext.koin.androidContext
+import org.koin.core.context.startKoin
+import org.koin.core.context.stopKoin
+
+class JetflowApplication : Application(){
+    override fun onCreate() {
+        super.onCreate()
+
+        startKoin {
+            androidContext(this@JetflowApplication)
+        }
+        AppModule.init()
+    }
+
+    override fun onTerminate() {
+        super.onTerminate()
+        stopKoin()
+    }
+}

app/src/main/java/com/wwt/jetflow/MainActivity.kt

@@ -1,23 +1,24 @@
 package com.wwt.jetflow
 
 import android.os.Bundle
-import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Surface
 import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.tooling.preview.Preview
+import com.wwt.jetflow.base.BaseActivity
 import com.wwt.jetflow.ui.theme.JetflowTheme
 
-class MainActivity : ComponentActivity() {
+class MainActivity : BaseActivity() {
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContent {
             JetflowTheme {
                 // A surface container using the 'background' color from the theme
                 Surface(color = MaterialTheme.colors.background) {
-                    Greeting("Android")
+                    JetflowApp()
                 }
             }
         }

app/src/main/java/com/wwt/jetflow/welcome/WelcomeScreen.kt

@@ -0,0 +1,23 @@
+package com.wwt.jetflow.welcome
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import kotlinx.coroutines.flow.Flow
+
+@Composable
+fun WelcomeScreen(
+    state: WelcomeScreenContract.State,
+    effectFlow: Flow<WelcomeScreenContract.Effect>?,
+    onEventSent: (event: WelcomeScreenContract.Event) -> Unit
+){
+    Box(
+        contentAlignment = Alignment.Center,
+        modifier = Modifier.fillMaxSize()
+    ) {
+        Text(text = state.welcomeText)
+    }
+}

app/src/main/java/com/wwt/jetflow/welcome/WelcomeScreenContract.kt

@@ -0,0 +1,18 @@
+package com.wwt.jetflow.welcome
+
+import com.wwt.jetflow.base.ViewEvent
+import com.wwt.jetflow.base.ViewSideEffect
+import com.wwt.jetflow.base.ViewState
+
+
+class WelcomeScreenContract {
+        sealed class Event : ViewEvent {
+    }
+
+    data class State(
+        val welcomeText: String =""
+    ) : ViewState
+
+    sealed class Effect : ViewSideEffect {
+    }
+}

app/src/main/java/com/wwt/jetflow/welcome/WelcomeViewModel.kt

@@ -0,0 +1,28 @@
+package com.wwt.jetflow.welcome
+
+import androidx.lifecycle.viewModelScope
+import com.wwt.jetflow.base.BaseViewModel
+import kotlinx.coroutines.launch
+
+
+class WelcomeViewModel :
+    BaseViewModel<WelcomeScreenContract.Event,
+            WelcomeScreenContract.State,
+            WelcomeScreenContract.Effect>() {
+
+
+    init {
+        viewModelScope.launch {
+            setState {
+                copy(welcomeText = "Welcome to Jetflow")
+            }
+        }
+    }
+
+    override fun setInitialState(): WelcomeScreenContract.State =
+        WelcomeScreenContract.State(welcomeText = "")
+
+    override fun handleEvents(event: WelcomeScreenContract.Event) {
+        TODO("Not yet implemented")
+    }
+}

build.gradle

@@ -2,6 +2,7 @@
 buildscript {
     ext {
         compose_version = '1.0.1'
+        koin_version = '3.1.3'
     }
     repositories {
         google()