0. 首先配置好rust开发环境：
rust编译android命令行程序

1. 进到项目的 app/src/main 目录， 创建一个rust目录
然后进到 app/src/main/rust, 执行

cargo new --lib softsim

2.在项目根目录下的 build.gradle 里添加
id “org.mozilla.rust-android-gradle.rust-android” version “0.9.2”
例如

plugins {
    id 'com.android.application' version '7.1.2' apply false
    id 'com.android.library' version '7.1.2' apply false
    id "org.mozilla.rust-android-gradle.rust-android" version "0.9.2"
}

3. 在 app/build.gradle 里添加

android { 
... 
}

cargo {
    module  = "./src/main/rust/softsim"       // Or whatever directory contains your Cargo.toml
    libname = "softsim"                       // Or whatever matches Cargo.toml's [package] name.
    targets = ["arm", "arm64"]                // See bellow for a longer list of options
    profile = 'release'                      // default debug
    pythonCommand = "python3"
}

dependencies {
   .....
}

tasks.whenTaskAdded { task ->
    if ((task.name == 'javaPreCompileDebug' || task.name == 'javaPreCompileRelease')) {
        task.dependsOn 'cargoBuild'
    }
}

4. settings.gradle

pluginManagement {
    repositories {
        gradlePluginPortal()
        google()
        mavenCentral()
    }
}