build(ns5-android): add product flavors config

.github/workflows/nyms5-android-build.yml

@@ -60,29 +60,28 @@ jobs:
         working-directory: sdk/lib/socks5-listener/
         env:
           RELEASE: true
+        # build for arm64 and x86_64
         run: ./build-android.sh aarch64 x86_64
 
       - name: Build APKs (unsigned debug)
         working-directory: nym-connect/native/android
         env:
           ANDROID_SDK_ROOT: ${{ env.ANDROID_HOME }}
-        run: ./gradlew :app:assembleDebug
+        # build for arm64 and x86_64
+        run: ./gradlew :app:assembleArch64Debug
 
       - name: Prepare APKs
         run: |
-          mkdir apk/
-          mv nym-connect/native/android/app/build/outputs/apk/debug/app-arm64-v8a-debug.apk \
-            apk/nyms5-arm64-debug.apk
-          mv nym-connect/native/android/app/build/outputs/apk/debug/app-x86_64-debug.apk \
-            apk/nyms5-x86_64-debug.apk
+          mkdir apk
+          mv nym-connect/native/android/app/build/outputs/apk/arch64/debug/app-arch64-debug.apk \
+            apk/nyms5-arch64-debug.apk
 
       - name: Upload APKs
         uses: actions/upload-artifact@v3
         with:
           name: nyms5-apk-debug
           path: |
-            apk/nyms5-arm64-debug.apk
-            apk/nyms5-x86_64-debug.apk
+            apk/nyms5-arch64-debug.apk
 
   # publish:
   #   name: Publish APK

nym-connect/native/android/README.md

@@ -6,15 +6,22 @@ _TODO_
 
 ### Getting started
 
-Install Android Studio and open the project.
+[Install](https://developer.android.com/studio/install) Android Studio and open
+the project.\
+Setup an android emulator using AVD.\
+[Run](https://developer.android.com/studio/run/emulator) the project.
+
+**⚠ NOTE**: be sure
+to [set](https://developer.android.com/studio/run#changing-variant)
+the build variant to `x86_64Debug` when running on emulator
 
 ### Lib Nym socks5
 
-This Application needs the native [nym-socks5-listener](https://github.com/nymtech/nym/blob/develop/sdk/lib/socks5-listener/Cargo.toml)
+This Application needs the
+native [nym-socks5-listener](https://github.com/nymtech/nym/blob/develop/sdk/lib/socks5-listener/Cargo.toml)
 library in order to work.
 
-To build it for arch x64 and arm (x64 is mainly for android emulator, arm 
-for APK distribution), from the root of the repo run
+To build it for x86_64 and arm64 arch, from the root of the repo run
 
 ```shell
 cd sdk/lib/socks5-listener/
@@ -24,10 +31,35 @@ cd sdk/lib/socks5-listener/
 To build in release mode run
 
 ```shell
-RELEASE=true ./build-android.sh aarch64
+RELEASE=true ./build-android.sh aarch64 x86_64
 ```
 
-The shared library for each ABIs will be automatically moved into 
+The shared library for each ABIs will be automatically moved into
 `app/src/main/jniLibs/*` directories.
 
-### Run _TODO_
+### APK build (from terminal)
+
+This project is setup with multiple [product flavors](app/build.gradle) to
+build for specific architectures.\
+Supported archs:
+
+- arm64
+- arm (old arm)
+- x86_64
+- x86
+
+For example to build for _arm64_ in _release_ mode use
+
+```shell
+./gradlew :app:assembleArm64Release
+```
+
+**NOTE**: you likely want _arch64_ (`arm64` & `x86_64`) for APK distribution
+
+To build a _universal_ APK which includes all ABI use
+
+```shell
+./gradlew :app:assembleUniversalRelease
+```
+
+**⚠ WARNING**: APK size will be multiplied

nym-connect/native/android/app/build.gradle

@@ -23,20 +23,60 @@ android {
 
     buildTypes {
         release {
-            minifyEnabled false
+            minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
 
-    splits {
-        abi {
-            enable true
-            reset()
-            include "x86_64", "arm64-v8a"
-            universalApk true
+    flavorDimensions "abi"
+    productFlavors {
+        universal {
+            dimension "abi"
+            ndk {
+                abiFilters "arm64-v8a", "armeabi-v7a", "x86_64", "x86"
+            }
+        }
+        arch64 {
+            dimension "abi"
+            ndk {
+                abiFilters "arm64-v8a", "x86_64"
+            }
+        }
+        arm64 {
+            dimension "abi"
+            ndk {
+                abiFilters "arm64-v8a"
+            }
+        }
+        arm {
+            dimension "abi"
+            ndk {
+                abiFilters "armeabi-v7a"
+            }
+        }
+        x86_64 {
+            dimension "abi"
+            ndk {
+                abiFilters "x86_64"
+            }
+        }
+        x86 {
+            dimension "abi"
+            ndk {
+                abiFilters "x86"
+            }
         }
     }
 
+//    splits {
+//        abi {
+//            enable true
+//            reset()
+//            include "x86_64", "arm64-v8a"
+//            universalApk true
+//        }
+//    }
+
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8