Resolve "Fix build application package"

Closes #2 (closed)

android/app/build.gradle

@@ -6,41 +6,61 @@ if (localPropertiesFile.exists()) {
     }
 }
 
+def gradleProperties = new Properties()
+def gradlePropertiesFile = rootProject.file('gradle.properties')
+if (gradlePropertiesFile.exists()) {
+    gradlePropertiesFile.withReader('UTF-8') { reader ->
+        gradleProperties.load(reader)
+    }
+}
+
 def flutterRoot = localProperties.getProperty('flutter.sdk')
 if (flutterRoot == null) {
     throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
 }
 
-def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
-if (flutterVersionCode == null) {
-    flutterVersionCode = '1'
+def appVersionCode = gradleProperties.getProperty('app.versionCode')
+if (appVersionCode == null) {
+    appVersionCode = '1'
 }
 
-def flutterVersionName = localProperties.getProperty('flutter.versionName')
-if (flutterVersionName == null) {
-    flutterVersionName = '1.0'
+def appVersionName = gradleProperties.getProperty('app.versionName')
+if (appVersionName == null) {
+    appVersionName = '1.0'
 }
 
 apply plugin: 'com.android.application'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
+def keystoreProperties = new Properties()
+def keystorePropertiesFile = rootProject.file('key.properties')
+if (keystorePropertiesFile.exists()) {
+    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
+}
+
 android {
     compileSdkVersion 30
 
     defaultConfig {
-        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "org.benoitharrault.random"
         minSdkVersion 16
         targetSdkVersion 30
-        versionCode flutterVersionCode.toInteger()
-        versionName flutterVersionName
+        versionCode appVersionCode.toInteger()
+        versionName appVersionName
+        archivesBaseName = "$applicationId" + "_" + "$versionCode"
     }
 
+    signingConfigs {
+        release {
+            keyAlias keystoreProperties['keyAlias']
+            keyPassword keystoreProperties['keyPassword']
+            storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
+            storePassword keystoreProperties['storePassword']
+        }
+    }
     buildTypes {
         release {
-            // TODO: Add your own signing config for the release build.
-            // Signing with the debug keys for now, so `flutter run --release` works.
-            signingConfig signingConfigs.debug
+            signingConfig signingConfigs.release
         }
     }
 }