feat: SplashActivity Handler 제거, SplashScreen API + ViewModel + 테스트로 교체

- androidx.core:core-splashscreen 도입, windowBackground 방식 제거
- SplashViewModel: Handler → viewModelScope + delay, isReady/navigateEvent StateFlow/SharedFlow
- SplashActivity: @androidentrypoint + viewModels(), setKeepOnScreenCondition으로 splash 유지
- SplashViewModelTest: 4개 케이스 (초기값, 1초 전, 1초 후 isReady, navigateEvent emit)
- activity_splash.xml 삭제 (빈 레이아웃)

Author: unam98

app/build.gradle

@@ -137,6 +137,7 @@ dependencies {
     implementation libs.androidx.swiperefreshlayout
     implementation libs.androidx.preference.ktx
     implementation libs.androidx.security.crypto.ktx
+    implementation libs.androidx.splashscreen
 
     // Compose
     implementation platform(libs.compose.bom)

app/src/main/java/com/runnect/runnect/presentation/splash/SplashActivity.kt

@@ -2,35 +2,36 @@ package com.runnect.runnect.presentation.splash
 
 import android.content.Intent
 import android.os.Bundle
-import android.os.Handler
-import android.os.Looper
 import androidx.activity.enableEdgeToEdge
+import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
-import com.runnect.runnect.R
+import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.repeatOnLifecycle
 import com.runnect.runnect.presentation.login.LoginActivity
-import com.runnect.runnect.presentation.scheme.SchemeActivity
-
+import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.launch
 
+@AndroidEntryPoint
 class SplashActivity : AppCompatActivity() {
-    private val handler = Handler(Looper.getMainLooper())
+    private val viewModel: SplashViewModel by viewModels()
 
     override fun onCreate(savedInstanceState: Bundle?) {
-        enableEdgeToEdge()
+        val splashScreen = installSplashScreen()
+        splashScreen.setKeepOnScreenCondition { !viewModel.isReady.value }
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_splash)
-        navigateToLoginScreen()
-    }
-
-    private fun navigateToLoginScreen() {
-        handler.postDelayed({
-            val intent = Intent(this, LoginActivity::class.java)
-            intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION)
-            startActivity(intent)
-            finish()
-        }, DELAY_TIME)
-    }
+        enableEdgeToEdge()
 
-    companion object {
-        private const val DELAY_TIME = 1000L
+        lifecycleScope.launch {
+            repeatOnLifecycle(Lifecycle.State.STARTED) {
+                viewModel.navigateEvent.collect {
+                    startActivity(Intent(this@SplashActivity, LoginActivity::class.java).apply {
+                        addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION)
+                    })
+                    finish()
+                }
+            }
+        }
     }
 }

app/src/main/java/com/runnect/runnect/presentation/splash/SplashViewModel.kt

@@ -0,0 +1,36 @@
+package com.runnect.runnect.presentation.splash
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asSharedFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class SplashViewModel @Inject constructor() : ViewModel() {
+
+    private val _isReady = MutableStateFlow(false)
+    val isReady: StateFlow<Boolean> = _isReady.asStateFlow()
+
+    private val _navigateEvent = MutableSharedFlow<Unit>(extraBufferCapacity = 1)
+    val navigateEvent: SharedFlow<Unit> = _navigateEvent.asSharedFlow()
+
+    init {
+        viewModelScope.launch {
+            delay(SPLASH_DELAY)
+            _isReady.value = true
+            _navigateEvent.emit(Unit)
+        }
+    }
+
+    companion object {
+        const val SPLASH_DELAY = 1000L
+    }
+}

app/src/main/res/layout/activity_splash.xml

@@ -29,10 +29,10 @@
         <item name="editTextStyle">@style/Widget.Runnect.EditText</item>
     </style>
 
-    <style name="SplashTheme" parent="Theme.AppCompat.Light.DarkActionBar">
-        <item name="windowNoTitle">true</item>
-        <item name="windowActionBar">false</item>
-        <item name="android:windowBackground">@drawable/splash</item>
+    <style name="SplashTheme" parent="Theme.SplashScreen">
+        <item name="windowSplashScreenBackground">@color/white</item>
+        <item name="windowSplashScreenAnimatedIcon">@drawable/splash</item>
+        <item name="postSplashScreenTheme">@style/Theme.Runnect</item>
     </style>
 
     <!-- 신고하기 BottomSheet 테마 -->

app/src/main/res/values/themes.xml

@@ -0,0 +1,61 @@
+package com.runnect.runnect.presentation.splash
+
+import app.cash.turbine.test
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.StandardTestDispatcher
+import kotlinx.coroutines.test.advanceTimeBy
+import kotlinx.coroutines.test.advanceUntilIdle
+import kotlinx.coroutines.test.resetMain
+import kotlinx.coroutines.test.runTest
+import kotlinx.coroutines.test.setMain
+import org.junit.After
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Before
+import org.junit.Test
+
+@OptIn(ExperimentalCoroutinesApi::class)
+class SplashViewModelTest {
+    private val testDispatcher = StandardTestDispatcher()
+
+    @Before
+    fun setUp() {
+        Dispatchers.setMain(testDispatcher)
+    }
+
+    @After
+    fun tearDown() {
+        Dispatchers.resetMain()
+    }
+
+    @Test
+    fun `초기 상태에서 isReady는 false다`() {
+        val viewModel = SplashViewModel()
+        assertFalse(viewModel.isReady.value)
+    }
+
+    @Test
+    fun `1초 경과 전에는 isReady가 false다`() = runTest(testDispatcher) {
+        val viewModel = SplashViewModel()
+        advanceTimeBy(SplashViewModel.SPLASH_DELAY - 1)
+        assertFalse(viewModel.isReady.value)
+    }
+
+    @Test
+    fun `1초 경과 후 isReady가 true가 된다`() = runTest(testDispatcher) {
+        val viewModel = SplashViewModel()
+        advanceUntilIdle()
+        assertTrue(viewModel.isReady.value)
+    }
+
+    @Test
+    fun `1초 후 navigateEvent가 emit된다`() = runTest(testDispatcher) {
+        val viewModel = SplashViewModel()
+        viewModel.navigateEvent.test {
+            advanceTimeBy(SplashViewModel.SPLASH_DELAY)
+            awaitItem()
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+}

app/src/test/java/com/runnect/runnect/presentation/splash/SplashViewModelTest.kt

@@ -26,6 +26,7 @@ viewpager2 = "1.1.0"
 swiperefreshlayout = "1.2.0"
 preference-ktx = "1.2.1"
 security-crypto = "1.1.0"
+splashscreen = "1.0.1"
 
 # Compose
 compose-bom = "2026.03.01"
@@ -106,6 +107,7 @@ androidx-viewpager2 = { group = "androidx.viewpager2", name = "viewpager2", vers
 androidx-swiperefreshlayout = { group = "androidx.swiperefreshlayout", name = "swiperefreshlayout", version.ref = "swiperefreshlayout" }
 androidx-preference-ktx = { group = "androidx.preference", name = "preference-ktx", version.ref = "preference-ktx" }
 androidx-security-crypto-ktx = { group = "androidx.security", name = "security-crypto-ktx", version.ref = "security-crypto" }
+androidx-splashscreen = { group = "androidx.core", name = "core-splashscreen", version.ref = "splashscreen" }
 
 # Compose
 compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "compose-bom" }