feat: add support for Java templates

packages/create-react-native-library/src/index.ts

@@ -16,14 +16,18 @@ const JS_FILES = path.resolve(__dirname, '../templates/js-library');
 const EXPO_FILES = path.resolve(__dirname, '../templates/expo-library');
 const CPP_FILES = path.resolve(__dirname, '../templates/cpp-library');
 const EXAMPLE_FILES = path.resolve(__dirname, '../templates/example');
+const NATIVE_COMMON_FILES = path.resolve(
+  __dirname,
+  '../templates/native-common'
+);
 
-// Android
-const NATIVE_FILES = (moduleType: ModuleType) => {
+// Java
+const JAVA_FILES = (moduleType: ModuleType) => {
   switch (moduleType) {
     case 'module':
-      return path.resolve(__dirname, '../templates/native-library');
+      return path.resolve(__dirname, '../templates/java-library');
     case 'view':
-      return path.resolve(__dirname, '../templates/native-view-library');
+      return path.resolve(__dirname, '../templates/java-view-library');
   }
 };
 
@@ -37,6 +41,16 @@ const OBJC_FILES = (moduleType: ModuleType) => {
   }
 };
 
+// Kotlin
+const KOTLIN_FILES = (moduleType: ModuleType) => {
+  switch (moduleType) {
+    case 'module':
+      return path.resolve(__dirname, '../templates/kotlin-library');
+    case 'view':
+      return path.resolve(__dirname, '../templates/kotlin-view-library');
+  }
+};
+
 // Swift
 const SWIFT_FILES = (moduleType: ModuleType) => {
   switch (moduleType) {
@@ -59,12 +73,16 @@ type ArgName =
 type ModuleType = 'module' | 'view';
 
 type LibraryType =
-  | 'native-view'
-  | 'native-view-swift'
   | 'native'
   | 'native-swift'
-  | 'js'
+  | 'native-kotlin'
+  | 'native-kotlin-swift'
+  | 'native-view'
+  | 'native-view-swift'
+  | 'native-view-kotlin'
+  | 'native-view-kotlin-swift'
   | 'cpp'
+  | 'js'
   | 'expo';
 
 type Answers = {
@@ -104,7 +122,19 @@ const args: Record<ArgName, yargs.Options> = {
   },
   'type': {
     description: 'Type package do you want to develop',
-    choices: ['native', 'native-swift', 'js', 'cpp', 'expo'],
+    choices: [
+      'native',
+      'native-swift',
+      'native-kotlin',
+      'native-kotlin-swift',
+      'native-view',
+      'native-view-swift',
+      'native-view-kotlin',
+      'native-view-kotlin-swift',
+      'cpp',
+      'js',
+      'expo',
+    ],
   },
 };
 
@@ -218,17 +248,33 @@ async function create(argv: yargs.Arguments<any>) {
       name: 'type',
       message: 'What type of package do you want to develop?',
       choices: [
-        { title: 'Native module in Kotlin and Objective-C', value: 'native' },
-        { title: 'Native module in Kotlin and Swift', value: 'native-swift' },
+        { title: 'Native module in Java and Objective-C', value: 'native' },
+        { title: 'Native module in Java and Swift', value: 'native-swift' },
+        {
+          title: 'Native module in Kotlin and Objective-C',
+          value: 'native-kotlin',
+        },
+        {
+          title: 'Native module in Kotlin and Swift',
+          value: 'native-kotlin-swift',
+        },
         { title: 'Native module with C++ code', value: 'cpp' },
         {
-          title: 'Native view in Kotlin and Objective-C',
+          title: 'Native view in Java and Objective-C',
           value: 'native-view',
         },
         {
-          title: 'Native view in Kotlin and Swift',
+          title: 'Native view in Java and Swift',
           value: 'native-view-swift',
         },
+        {
+          title: 'Native view in Kotlin and Objective-C',
+          value: 'native-view-kotlin',
+        },
+        {
+          title: 'Native view in Kotlin and Swift',
+          value: 'native-view-kotlin-swift',
+        },
         {
           title: 'JavaScript library with native example',
           value: 'js',
@@ -265,7 +311,12 @@ async function create(argv: yargs.Arguments<any>) {
 
   const project = slug.replace(/^(react-native-|@[^/]+\/)/, '');
   const moduleType: ModuleType =
-    type === 'native-view' || type === 'native-view-swift' ? 'view' : 'module';
+    type === 'native-view' ||
+    type === 'native-view-swift' ||
+    type === 'native-view-kotlin' ||
+    type === 'native-view-kotlin-swift'
+      ? 'view'
+      : 'module';
 
   // Get latest version of Bob from NPM
   let version: string;
@@ -308,13 +359,26 @@ async function create(argv: yargs.Arguments<any>) {
       package: slug.replace(/[^a-z0-9]/g, '').toLowerCase(),
       podspec: slug.replace(/[^a-z0-9]+/g, '-').replace(/^-/, ''),
       native:
-        type === 'native' ||
         type === 'cpp' ||
-        'native-swift' ||
-        'native-view' ||
-        'native-view-swift',
+        type === 'native' ||
+        type === 'native-swift' ||
+        type === 'native-kotlin' ||
+        type === 'native-kotlin-swift' ||
+        type === 'native-view' ||
+        type === 'native-view-swift' ||
+        type === 'native-view-kotlin' ||
+        type === 'native-view-kotlin-swift',
       cpp: type === 'cpp',
-      swift: type === 'native-swift' || 'native-view-swift',
+      kotlin:
+        type === 'native-kotlin' ||
+        type === 'native-kotlin-swift' ||
+        type === 'native-view-kotlin' ||
+        type === 'native-view-kotlin-swift',
+      swift:
+        type === 'native-swift' ||
+        type === 'native-kotlin-swift' ||
+        type === 'native-view-swift' ||
+        type === 'native-view-kotlin-swift',
       module: type !== 'js',
       moduleType,
     },
@@ -372,15 +436,22 @@ async function create(argv: yargs.Arguments<any>) {
       path.join(folder, 'example')
     );
 
-    await copyDir(NATIVE_FILES(moduleType), folder);
+    await copyDir(NATIVE_COMMON_FILES, folder);
 
-    if (type === 'cpp') {
+    if (options.project.cpp) {
       await copyDir(CPP_FILES, folder);
-    } else if (type === 'native-swift') {
+    }
+
+    if (options.project.swift) {
       await copyDir(SWIFT_FILES(moduleType), folder);
     } else {
       await copyDir(OBJC_FILES(moduleType), folder);
     }
+    if (options.project.kotlin) {
+      await copyDir(KOTLIN_FILES(moduleType), folder);
+    } else {
+      await copyDir(JAVA_FILES(moduleType), folder);
+    }
   }
 
   try {

packages/create-react-native-library/templates/java-library/android/build.gradle

@@ -0,0 +1,71 @@
+buildscript {
+    if (project == rootProject) {
+        repositories {
+            google()
+            jcenter()
+        }
+
+        dependencies {
+            classpath 'com.android.tools.build:gradle:3.5.3'
+        }
+    }
+}
+
+apply plugin: 'com.android.library'
+
+def safeExtGet(prop, fallback) {
+    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
+}
+
+android {
+    compileSdkVersion safeExtGet('<%- project.name %>_compileSdkVersion', 29)
+    buildToolsVersion safeExtGet('<%- project.name %>_buildToolsVersion', '29.0.2')
+    defaultConfig {
+        minSdkVersion safeExtGet('<%- project.name %>_minSdkVersion', 16)
+        targetSdkVersion safeExtGet('<%- project.name %>_targetSdkVersion', 29)
+        versionCode 1
+        versionName "1.0"
+<% if (project.cpp) { %>
+        externalNativeBuild {
+            cmake {
+                cppFlags "-O2 -frtti -fexceptions -Wall -fstack-protector-all"
+                abiFilters 'x86', 'x86_64', 'armeabi-v7a', 'arm64-v8a'
+            }
+        }
+<% } %>
+    }
+<% if (project.cpp) { %>
+    externalNativeBuild {
+        cmake {
+            path "CMakeLists.txt"
+        }
+    }
+<% } %>
+    buildTypes {
+        release {
+            minifyEnabled false
+        }
+    }
+    lintOptions {
+        disable 'GradleCompatible'
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+}
+
+repositories {
+    mavenLocal()
+    maven {
+        // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
+        url("$rootDir/../node_modules/react-native/android")
+    }
+    google()
+    jcenter()
+}
+
+dependencies {
+    //noinspection GradleDynamicVersion
+    implementation "com.facebook.react:react-native:+"  // From node_modules
+}

packages/create-react-native-library/templates/java-library/android/src/main/java/com/{%- project.package %}/{%= project.name %}Module.java

@@ -0,0 +1,47 @@
+package com.<%- project.package %>;
+
+import androidx.annotation.NonNull;
+
+import com.facebook.react.bridge.Promise;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.bridge.ReactContextBaseJavaModule;
+import com.facebook.react.bridge.ReactMethod;
+import com.facebook.react.module.annotations.ReactModule;
+
+@ReactModule(name = <%- project.name %>Module.NAME)
+public class <%- project.name %>Module extends ReactContextBaseJavaModule {
+    public static final String NAME = "<%- project.name %>";
+
+    public <%- project.name %>Module(ReactApplicationContext reactContext) {
+        super(reactContext);
+    }
+
+    @Override
+    @NonNull
+    public String getName() {
+        return NAME;
+    }
+
+<% if (project.cpp) { -%>
+    static {
+        try {
+            // Used to load the 'native-lib' library on application startup.
+            System.loadLibrary("cpp");
+        } catch (Exception ignored) {
+        }
+    }
+<% } -%>
+
+    // Example method
+    // See https://reactnative.dev/docs/native-modules-android
+    @ReactMethod
+    public void multiply(int a, int b, Promise promise) {
+<% if (project.cpp) { -%>
+        promise.resolve(nativeMultiply(a, b));
+<% } else { -%>
+        promise.resolve(a * b);
+<% } -%>
+    }
+
+    public static native int nativeMultiply(int a, int b);
+}

packages/create-react-native-library/templates/java-library/android/src/main/java/com/{%- project.package %}/{%= project.name %}Package.java

@@ -0,0 +1,28 @@
+package com.<%- project.package %>;
+
+import androidx.annotation.NonNull;
+
+import com.facebook.react.ReactPackage;
+import com.facebook.react.bridge.NativeModule;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.uimanager.ViewManager;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class <%- project.name %>Package implements ReactPackage {
+    @NonNull
+    @Override
+    public List<NativeModule> createNativeModules(@NonNull ReactApplicationContext reactContext) {
+        List<NativeModule> modules = new ArrayList<>();
+        modules.add(new <%- project.name %>Module(reactContext));
+        return modules;
+    }
+
+    @NonNull
+    @Override
+    public List<ViewManager> createViewManagers(@NonNull ReactApplicationContext reactContext) {
+        return Collections.emptyList();
+    }
+}