enhance APK release process with dual flavor support and update README

Author: dqez

.github/workflows/android-release.yml

@@ -29,15 +29,25 @@ jobs:
       - name: Build APK (Debug)
         run: ./gradlew assembleDebug --stacktrace --no-daemon
 
-      - name: Rename file APK
-        run: mv app/build/outputs/apk/debug/app-debug.apk app/build/outputs/apk/debug/ReaderApp-${{ github.ref_name }}.apk
+      - name: Rename and Collect APKs
+        run: |
+          mkdir -p release-apks
+          # Copy Legacy flavor
+          cp app/build/outputs/apk/legacy/debug/app-legacy-debug.apk release-apks/SimpleReader-Legacy-${{ github.ref_name }}.apk
+          # Copy Modern flavor
+          cp app/build/outputs/apk/modern/debug/app-modern-debug.apk release-apks/SimpleReader-Modern-${{ github.ref_name }}.apk
 
       - name: Create Release on GitHub
         uses: softprops/action-gh-release@v2
         with:
-          files: app/build/outputs/apk/debug/ReaderApp-${{ github.ref_name }}.apk
+          files: release-apks/*.apk
           name: Release ${{ github.ref_name }}
-          body: "Automatic version release ${{ github.ref_name }}"
+          body: |
+            Automatic version release ${{ github.ref_name }}
+            
+            📂 **Downloads:**
+            - **Legacy**: For Android 8.0 - 12 (API 26+).
+            - **Modern**: Optimized for Android 13+ (API 33+).
           draft: false
           prerelease: false
         env:

README.md

@@ -40,4 +40,5 @@ For developers interested in the implementation:
 
 ## Requirements
 
-*   Android 13 (API Level 33) or higher.
+*   **Modern Version**: Android 13 (API Level 33) or higher.
+*   **Legacy Version**: Android 8.0 (API Level 26) or higher.

README_VI.md

@@ -40,4 +40,5 @@ Dành cho các lập trình viên quan tâm đến việc triển khai:
 
 ## Yêu Cầu
 
-*   Android 13 (API Level 33) hoặc cao hơn.
+*   **Phiên bản Hiện đại (Modern)**: Android 13 (API Level 33) hoặc cao hơn.
+*   **Phiên bản Cũ (Legacy)**: Android 8.0 (API Level 26) hoặc cao hơn.

app/build.gradle.kts

@@ -11,14 +11,28 @@ android {
 
     defaultConfig {
         applicationId = "com.zeq.simple.reader"
-        minSdk = 33
+        // minSdk removed here, defined in productFlavors
         targetSdk = 36
         versionCode = 1
         versionName = "1.0"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
 
+    flavorDimensions += "version"
+    productFlavors {
+        create("legacy") {
+            dimension = "version"
+            minSdk = 26
+            versionNameSuffix = "-legacy"
+        }
+        create("modern") {
+            dimension = "version"
+            minSdk = 33
+            versionNameSuffix = "-modern"
+        }
+    }
+
     buildTypes {
         release {
             isMinifyEnabled = true