chore: initial commit

android/CMakeLists.txt

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+project(jecnaapi)
+cmake_minimum_required(VERSION 3.9.0)
+
+set(PACKAGE_NAME jecnaapi)
+set(CMAKE_VERBOSE_MAKEFILE ON)
+set(CMAKE_CXX_STANDARD 20)
+
+# Define C++ library and add all sources
+add_library(${PACKAGE_NAME} SHARED src/main/cpp/cpp-adapter.cpp)
+
+# Add Nitrogen specs :)
+include(${CMAKE_SOURCE_DIR}/../nitrogen/generated/android/jecnaapi+autolinking.cmake)
+
+# Set up local includes
+include_directories("src/main/cpp" "../cpp")
+
+find_library(LOG_LIB log)
+
+# Link all libraries together
+target_link_libraries(
+        ${PACKAGE_NAME}
+        ${LOG_LIB}
+        android # <-- Android core
+)

android/build.gradle

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+buildscript {
+  ext.Jecnaapi = [
+    kotlinVersion: "2.0.21",
+    minSdkVersion: 24,
+    compileSdkVersion: 36
+  ]
+
+  ext.getExtOrDefault = { prop ->
+    if (rootProject.ext.has(prop)) {
+      return rootProject.ext.get(prop)
+    }
+
+    return Jecnaapi[prop]
+  }
+
+  repositories {
+    google()
+    mavenCentral()
+  }
+
+  dependencies {
+    classpath "com.android.tools.build:gradle:8.7.2"
+    // noinspection DifferentKotlinGradleVersion
+    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${getExtOrDefault('kotlinVersion')}"
+  }
+}
+
+def reactNativeArchitectures() {
+  def value = rootProject.getProperties().get("reactNativeArchitectures")
+  return value ? value.split(",") : ["armeabi-v7a", "x86", "x86_64", "arm64-v8a"]
+}
+
+apply plugin: "com.android.library"
+apply plugin: "kotlin-android"
+apply from: '../nitrogen/generated/android/jecnaapi+autolinking.gradle'
+
+apply plugin: "com.facebook.react"
+
+android {
+  namespace "com.margelo.nitro.jecnaapi"
+
+  compileSdkVersion getExtOrDefault("compileSdkVersion")
+
+  defaultConfig {
+    minSdkVersion getExtOrDefault("minSdkVersion")
+
+    externalNativeBuild {
+      cmake {
+        cppFlags "-frtti -fexceptions -Wall -fstack-protector-all"
+        arguments "-DANDROID_STL=c++_shared", "-DANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES=ON"
+        abiFilters (*reactNativeArchitectures())
+
+        buildTypes {
+          debug {
+            cppFlags "-O1 -g"
+          }
+          release {
+            cppFlags "-O2"
+          }
+        }
+      }
+    }
+  }
+
+  externalNativeBuild {
+    cmake {
+      path "CMakeLists.txt"
+    }
+  }
+
+  packaging {
+    resources {
+      excludes += [
+        "META-INF",
+        "META-INF/**"
+      ]
+    }
+
+    jniLibs {
+      excludes += [
+        "**/libc++_shared.so",
+        "**/libfbjni.so",
+        "**/libjsi.so",
+        "**/libfolly_json.so",
+        "**/libfolly_runtime.so",
+        "**/libglog.so",
+        "**/libhermes.so",
+        "**/libhermes-executor-debug.so",
+        "**/libhermes_executor.so",
+        "**/libreactnative.so",
+        "**/libreactnativejni.so",
+        "**/libturbomodulejsijni.so",
+        "**/libreact_nativemodule_core.so",
+        "**/libjscexecutor.so"
+      ]
+    }
+  }
+
+  buildFeatures {
+    prefab true
+  }
+
+  compileOptions {
+    sourceCompatibility JavaVersion.VERSION_17
+    targetCompatibility JavaVersion.VERSION_17
+  }
+}
+
+dependencies {
+  implementation "com.facebook.react:react-android"
+  implementation project(":react-native-nitro-modules")
+}

android/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+</manifest>

android/src/main/cpp/cpp-adapter.cpp

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+#include <jni.h>
+#include "jecnaapiOnLoad.hpp"
+
+#include <fbjni/fbjni.h>
+
+
+JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void*) {
+  return facebook::jni::initialize(vm, []() {
+    margelo::nitro::jecnaapi::registerAllNatives();
+  });
+}

android/src/main/java/com/margelo/nitro/jecnaapi/Jecnaapi.kt

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+package com.margelo.nitro.jecnaapi
+  
+import com.facebook.proguard.annotations.DoNotStrip
+
+@DoNotStrip
+class Jecnaapi : HybridJecnaapiSpec() {
+  override fun multiply(a: Double, b: Double): Double {
+    return a * b
+  }
+}

android/src/main/java/com/margelo/nitro/jecnaapi/JecnaapiPackage.kt

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+package com.margelo.nitro.jecnaapi
+
+import com.facebook.react.BaseReactPackage
+import com.facebook.react.bridge.NativeModule
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.module.model.ReactModuleInfoProvider
+
+class JecnaapiPackage : BaseReactPackage() {
+    override fun getModule(name: String, reactContext: ReactApplicationContext): NativeModule? {
+        return null
+    }
+
+    override fun getReactModuleInfoProvider(): ReactModuleInfoProvider {
+        return ReactModuleInfoProvider { HashMap() }
+    }
+
+    companion object {
+        init {
+            System.loadLibrary("jecnaapi")
+        }
+    }
+}