Add compilation instructions

README.md

@@ -1,16 +1,38 @@
 # comunic
 
-Comunic client
+A Comunic client written with flutter
 
-## Getting Started
+## Getting Started on Android
 
-This project is a starting point for a Flutter application.
+## Flavors
 
-A few resources to get you started if this is your first Flutter project:
+### Application appearance & Title
+* `stable` : For main releases
+* `beta` : For intermediate releases
 
-- [Lab: Write your first Flutter app](https://flutter.io/docs/get-started/codelab)
-- [Cookbook: Useful Flutter samples](https://flutter.io/docs/cookbook)
 
-For help getting started with Flutter, view our 
+## Build types
-[online documentation](https://flutter.io/docs), which offers tutorials, 
+
-samples, guidance on mobile development, and a full API reference.
+### Beta
+No special configuration is required. Use the `lib/main_dev.dart` file as entrypoint to the application.
+
+### Releases
+To make release builds, the application needs to be signed. Create a file named `key.properties` in the android directory with the following content: 
+```
+storePassword=store password
+keyPassword=key password
+keyAlias=key alias
+storeFile=path to keystore file
+```
+
+Use the `lib/main_online.dart` as entry point to the application.
+
+### Building
+Now choose a flavor and build the application using :
+```sh
+# Generic command
+flutter build apk --flavor BUILD_FLAVOR -t ENTRY_POINT
+
+# Example
+flutter build apk --flavor beta -t lib/main_online.dart
+```

android/.gitignore

@@ -0,0 +1 @@
+key.properties

android/app/build.gradle

@@ -24,6 +24,14 @@ if (flutterVersionName == null) {
 apply plugin: 'com.android.application'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
+
+// To sign packages
+def keystoreProperties = new Properties()
+def keystorePropertiesFile = rootProject.file('key.properties')
+if (keystorePropertiesFile.exists()) {
+    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
+}
+
 android {
     compileSdkVersion 28
 
@@ -41,11 +49,20 @@ android {
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
 
+
+    signingConfigs {
+        release {
+            keyAlias keystoreProperties['keyAlias']
+            keyPassword keystoreProperties['keyPassword']
+            storeFile file(keystoreProperties['storeFile'])
+            storePassword keystoreProperties['storePassword']
+        }
+    }
+
+
     buildTypes {
         release {
-            // TODO: Add your own signing config for the release build.
+            signingConfig signingConfigs.release
-            // Signing with the debug keys for now, so `flutter run --release` works.
-            signingConfig signingConfigs.debug
         }
     }