安卓studio 安装SDK 和 NDK
所有操作是mac m1 上操作的
NDK 可以在 Android studio 设置里面,搜索sdk ,然后看下SDK 位置例如我下面的位置:
/Users/admin/Library/Android/sdk/ndk
Android NDK(Native Development Kit)生成一个独立的工具链
# 其中/Users/admin/go/ndk/arm64 这个地址是生成各种平台目录
# aarch64-linux-android
python3 /Users/admin/Library/Android/sdk/ndk/27.0.12077973/build/tools/make_standalone_toolchain.py --api 27 --arch arm64 --install-dir /Users/admin/go/ndk/arm64# armv7-linux-androideabi
python3 /Users/admin/Library/Android/sdk/ndk/27.0.12077973/build/tools/make_standalone_toolchain.py --api 27 --arch arm --install-dir /Users/admin/go/ndk/arm# x86_64-linux-android
python3 /Users/admin/Library/Android/sdk/ndk/27.0.12077973/build/tools/make_standalone_toolchain.py --api 27 --arch x86_64 --install-dir /Users/admin/go/ndk/x86_64
编辑 ~/.cargo/config 文件添加
# 这个是我api 27版本的,30版本好像ar要改
[target.aarch64-linux-android]
ar = "/Users/admin/go/ndk/arm64/bin/llvm-ar"
linker = "/Users/admin/go/ndk/arm64/bin/aarch64-linux-android-clang"[target.armv7-linux-androideabi]
ar = "/Users/admin/go/ndk/arm/bin/llvm-ar"
linker = "/Users/admin/go/ndk/arm/bin/arm-linux-androideabi-clang"[target.x86_64-linux-android]
ar = "/Users/admin/go/ndk/x86_64/bin/llvm-ar"
linker = "/Users/admin/go/ndk/x86_64/bin/x86_64-linux-android-clang"30 版本ar路径变了
[target.aarch64-linux-android]
ar = "/Users/你的用户名/NDK/arm64/bin/aarch64-linux-android-ar"
linker = "/Users/你的用户名/NDK/arm64/bin/aarch64-linux-android-clang"[target.armv7-linux-androideabi]
ar = "/Users/你的用户名/NDK/arm/bin/arm-linux-androideabi-ar"
linker = "/Users/你的用户名/NDK/arm/bin/arm-linux-androideabi-clang"[target.i686-linux-android]
ar = "/Users/你的用户名/NDK/x86/bin/i686-linux-android-ar"
linker = "/Users/你的用户名/NDK/x86/bin/i686-linux-android-clang"
rust 程序流程
创建项目
cargo new --lib my_crypto_lib
修改 Cargo.toml
# 下面几个值是优化包的体积 打出来so很小
[profile.release]
lto = true
opt-level = "z"
panic = "abort"
codegen-units = 1[dependencies]
jni = "0.21.1"[lib]
name = "my_crypto_lib"
crate-type = ["cdylib"]
rust程序
use jni::objects::{JClass, JString};
use jni::JNIEnv;
use jni::sys::{jint,jstring};// 注意如果包名带下划线需要写成 _1#[no_mangle]
pub extern "C" fn Java_com_example_rust_1app_RustClass_add(_env: JNIEnv, _class: JClass, a: jint, b: jint) -> jint {a + b
}#[no_mangle]
pub extern "C" fn Java_com_example_rust_1app_RustClass_processStringo<'local>(mut env: JNIEnv<'local>, _class: JClass<'local>, input: JString<'local>) -> jstring {// First, we have to get the string out of Java. Check out the `strings`// module for more info on how this works.let input: String =env.get_string(&input).expect("Couldn't get java string!").into();// Then we have to create a new Java string to return. Again, more info// in the `strings` module.let output = env.new_string(format!("Hello, {}!", input)).expect("Couldn't create java string!");// Finally, extract the raw pointer to return.output.into_raw()}
确认rust 跨平台是否安装
rustup show
安装多个安卓架构平台
# arm64
rustup target install aarch64-linux-android
# arm32
rustup target install armv7-linux-androideabi
# amd64
rustup target install x86_64-linux-android
# amd32
rustup target install i686-linux-androidrustup show
验证编译rust so 动态库
cargo build --target aarch64-linux-android --release
cargo build --target armv7-linux-androideabi --release
cargo build --target x86_64-linux-android --release
cargo build --target i686-linux-android --release
更小的生成方式
cargo install cargo-ndk 确认cargo intall --list
多个平台打包,这个方式比上面cargo build 要小很多具体原因不知道是什么,ndk这个库估计做了优化
# 会生成到项目目录 jniLibs 下,
cargo ndk -t armeabi-v7a -t arm64-v8a -t x86 -t x86_64 -o ./jniLibs build --release
生成如下:
再jniLibs目录查看下大小
find . -type f -exec du -h {} +
打包出来很小
xz:jniLibs (master*) $ find . -type f -exec du -h {} +8.0K ./.DS_Store80K ./armeabi-v7a/libmy_crypto_lib.so
264K ./arm64-v8a/libmy_crypto_lib.so
128K ./x86_64/libmy_crypto_lib.so
然后吧 jniLibs 复制到java项目
如图:
build.gradle 修改下引入
android {
......sourceSets {main {jniLibs.srcDirs = ['jniLibs']}androidTest {jniLibs.srcDirs = ['jniLibs']}}....
}
如图
安卓java程序
package com.example.rust_app;public class RustClass {static {System.loadLibrary("my_crypto_lib");}public native int add(int a, int b);public native String processStringo(String a);public void addTest() {int result = add(99, 5);System.out.println("Result: " + result);String resultStr = processStringo(",world");System.out.println("string:" + resultStr);}
}
测试效果
借鉴了文章: https://blog.csdn.net/ysy950803/article/details/122882360
rust jni 文档地址: https://docs.rs/jni/latest/jni/
jni 本地rust 代码调试
192:project (master*) $ tree
.
├── com
│ └── example
│ └── rust_app
│ ├── Main.class
│ ├── RustClass.class
│ └── com_example_rust_app_RustClass.h
└── src└── com└── example└── rust_app├── Main.java└── RustClass.java
里面src 根据java 的包名和来的 , com 下面的不用自己创建
生成java class 文件
javac -d ./ src/com/example/rust_app/RustClass.java
javac -d ./ src/com/example/rust_app/Main.java
头文件生成
javac -h ./com/example/rust_app src/com/example/rust_app/RustClass.javacargo build
#引入动态库,这个需要引入本机的不是so,mac 上是.dylib 后缀,linux 是 so,windows 是dll,例如这个就是我动态库地址 /Users/admin/go/rust/my_crypto_lib/target/debug
java -Djava.library.path=/Users/admin/go/rust/my_crypto_lib/target/debug com.example.rust_app.Main就会调用动态库方法
例如我rust 代码 lib.rs
mod lib_aes;use jni::objects::{JClass, JString};
use jni::JNIEnv;
use jni::sys::{jint,jstring};
// cargo ndk -t armeabi-v7a -t arm64-v8a -t x86_64 -o ./jniLibs build --release#[no_mangle]
pub extern "C" fn Java_com_example_rust_1app_RustClass_add(_env: JNIEnv, _class: JClass, a: jint, b: jint) -> jint {a + b
}#[no_mangle]
pub extern "C" fn Java_com_example_rust_1app_RustClass_processStringo<'local>(mut env: JNIEnv<'local>, _class: JClass<'local>, input: JString<'local>) -> jstring {let mut input: String =env.get_string(&input).expect("Couldn't get java string!").into();test_add(&mut input);let output = env.new_string(format!("Hello, {}!", input)).expect("Couldn't create java string!");output.into_raw()}#[no_mangle]
pub extern "C" fn Java_com_example_rust_1app_RustClass_decode<'local>(mut env: JNIEnv<'local>, _class: JClass<'local>, input: JString<'local>) -> jstring {// 尝试从 Java 字符串转换为 Rust Stringlet input_result = env.get_string(&input);match input_result {Ok(rust_string) => {// 成功转换后进行操作let rust_string: String = rust_string.into();let output = env.new_string(lib_aes::decode_run(&rust_string));// 检查新字符串创建是否成功match output {Ok(java_string) => java_string.into_raw(),Err(_) => {// 创建输出字符串失败,返回空字符串env.new_string("").expect("Couldn't create Java string!").into_raw()}}},Err(_) => {// 输入字符串转换失败,返回空字符串env.new_string("").expect("Couldn't create Java string!").into_raw()}}}fn test_add(s: &mut String) {s.push_str(" How are you?");
}
java RustClass.java 代码
public class RustClass {static {System.loadLibrary("my_crypto_lib");}public native int add(int a, int b);public native String processStringo(String a);public native String decode(String a);public void addTest() {String resultJson = decode("fpFgVAlfnUpiq7JI909po4VLw/vS+p4A8AVgwnVsZwcZSN2b/I44o/4pGEP5oHVCRBQx4aJeUSlumboaWBjJx/5usD1Ju4d6XwZWZ2CC+9I=");System.out.println("解密:" + resultJson);}
}
java Main.java
package com.example.rust_app;public class Main {public static void main(String[] args) {RustClass rustClass = new RustClass();rustClass.addTest();}
}
openssl 编译失败解决方式
https://gist.github.com/ospfranco/7b691ddc8f2fdba66dde5f67564a7c69
https://stackoverflow.com/questions/76352747/openssl-cross-compilation-fails添加链接描述