Enable flavors in Android

Author: cwe1ss

android/app/build.gradle

@@ -52,6 +52,21 @@ android {
             signingConfig signingConfigs.debug
         }
     }
+
+    flavorDimensions "app"
+
+    productFlavors {
+        dev {
+            dimension "app"
+            applicationId "at.chwe.flutterflavors.dev"
+            resValue "string", "app_name", "DEV Flutter Flavors"
+        }
+        live {
+            dimension "app"
+            applicationId "at.chwe.flutterflavors"
+            resValue "string", "app_name", "Flutter Flavors"
+        }
+    }
 }
 
 flutter {

android/app/src/main/AndroidManifest.xml

@@ -7,7 +7,7 @@
          FlutterApplication and put your custom class here. -->
     <application
         android:name="io.flutter.app.FlutterApplication"
-        android:label="flutter_flavors"
+        android:label="@string/app_name"
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name=".MainActivity"

android/app/src/main/kotlin/com/example/flutter_flavors/MainActivity.kt

@@ -1,6 +1,17 @@
 package com.example.flutter_flavors
 
+import androidx.annotation.NonNull;
 import io.flutter.embedding.android.FlutterActivity
+import io.flutter.embedding.engine.FlutterEngine
+import io.flutter.plugin.common.MethodChannel
+import io.flutter.plugins.GeneratedPluginRegistrant
 
 class MainActivity: FlutterActivity() {
-}
+    override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
+        GeneratedPluginRegistrant.registerWith(flutterEngine);
+
+        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, "flavor").setMethodCallHandler {
+            call, result -> result.success(BuildConfig.FLAVOR)
+        }
+    }
+}