This project sets up the NDK (Native Development Kit) in Android for communication between an
Android project and C/C code. In this example, the C/C code simply prints a text message to the
Android application.
For communication between Android Native and Flutter, I used a channel (refer to the documentation
for more details). If you need an additional example of using channels, please check my repository
for more information: ExampleChannelNativeAndroidWithCustomData.
Important
NOTE: EXAMPLE FOR ANDROID ONLY.
- Install the latest NDK and CMake version from Android Studio SDK Manager from the SDK Tools section.
- Create the cpp package, add the CMake .txt and .cpp file. Some name below is base on .cpp file name.
# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html
# Sets the minimum version of CMake required to build the native library.
cmake_minimum_required(VERSION 3.4.1)
# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.
add_library( # Sets the name of the library.
message # based on .cpp file name
# Sets the library as a shared library.
SHARED
# Provides a relative path to your source file(s).
message.cpp) # based on .cpp file name
# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.
find_library( # Sets the name of the path variable.
log-lib
# Specifies the name of the NDK library that
# you want CMake to locate.
log)
# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.
target_link_libraries( # Specifies the target library.
message # based on .cpp file name
# Links the target library to the log library
# included in the NDK.
${log-lib})- Add the follow code in Gradle file.
android {
//Other Gradle Code Here...
externalNativeBuild {
cmake {
path = file("src/main/cpp/CMakeLists.txt")
version = "3.31.1"
}
}
ndkVersion = "27.2.12479018"
//Other Gradle Code Here...
}- Load the C/C file.
companion object {
/**
* Load the C file
* */
init {
System.loadLibrary("message")
}
}- Initialize the method(s) from .cpp file.
private external fun message(): String Important
Check my article 👉 NDK Setup on Android/Flutter Android Project - Medium 👈
Important
Similar project with (Kotlin Language) 👉 AndroidProjectAndNDK 👈
Flutter SDK version: 3.27.1
Dart Version: 3.6.0
https://github.com/android/ndk-samples
https://developer.android.com/studio/projects/add-native-code
https://blog.mindorks.com/getting-started-with-android-ndk-android-tutorial/
https://medium.com/@shreebhagwat94/flutter-platform-channel-46578d21e69
https://blog.devgenius.io/use-flutter-screens-in-native-android-app-share-data-among-them-d97d670807a6