Reduce start up time (owlmail#89)

app/build.gradle

@@ -131,6 +131,7 @@ dependencies {
     kapt Dependencies.RoomCompiler
 
     implementation Dependencies.BaselineProfileInstaller
+    implementation Dependencies.StartUp
 
     implementation(project(Modules.Auth))
     implementation(project(Modules.Mail))

app/src/main/AndroidManifest.xml

@@ -25,10 +25,24 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
         <provider
-            android:name="androidx.startup.InitializationProvider"
-            android:authorities="github.owlmail.app.androidx-startup"
+            android:name="com.google.firebase.provider.FirebaseInitProvider"
+            android:authorities="${applicationId}.FirebaseInitProvider"
+            android:exported="false"
             tools:node="remove" />
+        <provider
+            android:name="androidx.startup.InitializationProvider"
+            android:authorities="${applicationId}.androidx-startup"
+            android:exported="false"
+            tools:node="merge">
+            <meta-data
+                android:name="github.owlmail.app.initializer.FirebaseInitializer"
+                android:value="androidx.startup" />
+            <meta-data
+                android:name="github.owlmail.app.initializer.StethoInitializer"
+                android:value="androidx.startup" />
+        </provider>
     </application>
 
 </manifest>

app/src/main/kotlin/github/owlmail/app/OwlMailApp.kt

@@ -3,8 +3,6 @@ package github.owlmail.app
 import android.app.Application
 import androidx.hilt.work.HiltWorkerFactory
 import androidx.work.Configuration
-import com.facebook.stetho.Stetho
-import com.google.firebase.FirebaseApp
 import dagger.hilt.android.HiltAndroidApp
 import javax.inject.Inject
 
@@ -17,12 +15,4 @@ class OwlMailApp : Application(), Configuration.Provider {
         Configuration.Builder()
             .setWorkerFactory(workerFactory)
             .build()
-
-    override fun onCreate() {
-        super.onCreate()
-        FirebaseApp.initializeApp(this)
-        if (BuildConfig.DEBUG) {
-            Stetho.initializeWithDefaults(this)
-        }
-    }
 }

app/src/main/kotlin/github/owlmail/app/initializer/FirebaseInitializer.kt

@@ -0,0 +1,16 @@
+package github.owlmail.app.initializer
+
+import android.content.Context
+import androidx.startup.Initializer
+import com.google.firebase.FirebaseApp
+
+class FirebaseInitializer : Initializer<Unit> {
+
+    override fun create(context: Context) {
+        FirebaseApp.initializeApp(context)
+    }
+
+    override fun dependencies(): List<Class<out Initializer<*>>> {
+        return emptyList()
+    }
+}

app/src/main/kotlin/github/owlmail/app/initializer/StethoInitializer.kt

@@ -0,0 +1,18 @@
+package github.owlmail.app.initializer
+
+import android.content.Context
+import androidx.startup.Initializer
+import com.facebook.stetho.Stetho
+import github.owlmail.app.BuildConfig
+
+class StethoInitializer : Initializer<Unit> {
+    override fun create(context: Context) {
+        if (BuildConfig.DEBUG) {
+            Stetho.initializeWithDefaults(context)
+        }
+    }
+
+    override fun dependencies(): List<Class<out Initializer<*>>> {
+        return emptyList()
+    }
+}

buildSrc/src/main/kotlin/Dependencies.kt

@@ -83,4 +83,6 @@ object Dependencies {
     // Baseline Profile installer
     const val BaselineProfileInstaller =
         "androidx.profileinstaller:profileinstaller:${DependencyVersion.BaselineProfileInstaller}"
+
+    const val StartUp = "androidx.startup:startup-runtime:${DependencyVersion.StartUp}"
 }

buildSrc/src/main/kotlin/DependencyVersion.kt

@@ -64,4 +64,6 @@ object DependencyVersion {
 
     // Baseline Profile installer
     const val BaselineProfileInstaller = "1.2.2"
+
+    const val StartUp = "1.1.1"
 }