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Add Android support for cnativeapi and example app
Introduces Android build configuration, manifests, resources, and Gradle files for both the cnativeapi package and its example app. Also updates the libnativeapi submodule reference. This enables building and running the native API plugin and its example on Android.
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‎packages/cnativeapi/android/.gitignore‎

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*.iml
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.gradle
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/local.properties
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/.idea/workspace.xml
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/.idea/libraries
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.DS_Store
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/build
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/captures
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.cxx

‎packages/cnativeapi/android/build.gradle‎

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// The Android Gradle Plugin builds the native code with the Android NDK.
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group = "com.example.cnativeapi"
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version = "1.0"
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buildscript {
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repositories {
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google()
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mavenCentral()
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}
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dependencies {
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// The Android Gradle Plugin knows how to build native code with the NDK.
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classpath("com.android.tools.build:gradle:8.9.1")
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}
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}
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rootProject.allprojects {
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repositories {
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google()
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mavenCentral()
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}
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}
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apply plugin: "com.android.library"
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android {
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namespace = "com.example.cnativeapi"
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// Bumping the plugin compileSdk version requires all clients of this plugin
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// to bump the version in their app.
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compileSdk = 36
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// Use the NDK version
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// declared in /android/app/build.gradle file of the Flutter project.
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// Replace it with a version number if this plugin requires a specific NDK version.
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// (e.g. ndkVersion "23.1.7779620")
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ndkVersion = android.ndkVersion
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// Invoke the shared CMake build with the Android Gradle Plugin.
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externalNativeBuild {
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cmake {
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path = "../src/CMakeLists.txt"
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// The default CMake version for the Android Gradle Plugin is 3.10.2.
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// https://developer.android.com/studio/projects/install-ndk#vanilla_cmake
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//
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// The Flutter tooling requires that developers have CMake 3.10 or later
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// installed. You should not increase this version, as doing so will cause
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// the plugin to fail to compile for some customers of the plugin.
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// version "3.10.2"
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}
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}
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compileOptions {
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sourceCompatibility = JavaVersion.VERSION_11
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targetCompatibility = JavaVersion.VERSION_11
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}
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defaultConfig {
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minSdk = 24
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}
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}

‎packages/cnativeapi/android/settings.gradle‎

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rootProject.name = 'cnativeapi'

‎packages/cnativeapi/android/src/main/AndroidManifest.xml‎

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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="com.example.cnativeapi">
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</manifest>

‎packages/cnativeapi/example/android/.gitignore‎

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gradle-wrapper.jar
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/.gradle
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/captures/
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/gradlew
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/gradlew.bat
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/local.properties
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GeneratedPluginRegistrant.java
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.cxx/
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# Remember to never publicly share your keystore.
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# See https://flutter.dev/to/reference-keystore
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key.properties
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**/*.keystore
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**/*.jks

‎packages/cnativeapi/example/android/app/build.gradle.kts‎

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plugins {
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id("com.android.application")
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id("kotlin-android")
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// The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
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id("dev.flutter.flutter-gradle-plugin")
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}
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android {
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namespace = "com.example.cnativeapi_example"
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compileSdk = flutter.compileSdkVersion
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ndkVersion = flutter.ndkVersion
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compileOptions {
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sourceCompatibility = JavaVersion.VERSION_11
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targetCompatibility = JavaVersion.VERSION_11
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}
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kotlinOptions {
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jvmTarget = JavaVersion.VERSION_11.toString()
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}
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defaultConfig {
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// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
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applicationId = "com.example.cnativeapi_example"
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// You can update the following values to match your application needs.
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// For more information, see: https://flutter.dev/to/review-gradle-config.
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minSdk = flutter.minSdkVersion
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targetSdk = flutter.targetSdkVersion
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versionCode = flutter.versionCode
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versionName = flutter.versionName
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}
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buildTypes {
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release {
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// TODO: Add your own signing config for the release build.
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// Signing with the debug keys for now, so `flutter run --release` works.
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signingConfig = signingConfigs.getByName("debug")
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}
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}
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}
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flutter {
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source = "../.."
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}

‎packages/cnativeapi/example/android/app/src/debug/AndroidManifest.xml‎

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<manifest xmlns:android="http://schemas.android.com/apk/res/android">
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<!-- The INTERNET permission is required for development. Specifically,
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the Flutter tool needs it to communicate with the running application
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to allow setting breakpoints, to provide hot reload, etc.
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-->
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<uses-permission android:name="android.permission.INTERNET"/>
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</manifest>

‎packages/cnativeapi/example/android/app/src/main/AndroidManifest.xml‎

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<manifest xmlns:android="http://schemas.android.com/apk/res/android">
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<application
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android:label="cnativeapi_example"
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android:name="${applicationName}"
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android:icon="@mipmap/ic_launcher">
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<activity
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android:name=".MainActivity"
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android:exported="true"
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android:launchMode="singleTop"
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android:taskAffinity=""
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android:theme="@style/LaunchTheme"
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android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
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android:hardwareAccelerated="true"
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android:windowSoftInputMode="adjustResize">
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<!-- Specifies an Android theme to apply to this Activity as soon as
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the Android process has started. This theme is visible to the user
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while the Flutter UI initializes. After that, this theme continues
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to determine the Window background behind the Flutter UI. -->
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<meta-data
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android:name="io.flutter.embedding.android.NormalTheme"
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android:resource="@style/NormalTheme"
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/>
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<intent-filter>
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<action android:name="android.intent.action.MAIN"/>
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<category android:name="android.intent.category.LAUNCHER"/>
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</intent-filter>
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</activity>
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<!-- Don't delete the meta-data below.
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This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
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<meta-data
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android:name="flutterEmbedding"
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android:value="2" />
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</application>
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<!-- Required to query activities that can process text, see:
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https://developer.android.com/training/package-visibility and
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https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.
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In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
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<queries>
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<intent>
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<action android:name="android.intent.action.PROCESS_TEXT"/>
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<data android:mimeType="text/plain"/>
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</intent>
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</queries>
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</manifest>

‎packages/cnativeapi/example/android/app/src/main/kotlin/com/example/cnativeapi_example/MainActivity.kt‎

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package com.example.cnativeapi_example
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import io.flutter.embedding.android.FlutterActivity
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class MainActivity : FlutterActivity()

‎packages/cnativeapi/example/android/app/src/main/res/drawable-v21/launch_background.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<!-- Modify this file to customize your launch splash screen -->
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<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
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<item android:drawable="?android:colorBackground" />
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<!-- You can insert your own image assets here -->
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<!-- <item>
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<bitmap
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android:gravity="center"
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android:src="@mipmap/launch_image" />
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</item> -->
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</layer-list>

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