Rust Libraries

rust_library를 사용하여 Android용 새 Rust 라이브러리를 만듭니다.

여기서 2개의 라이브러리 의존성을 설언합니다.

• 아래에 정의한 libgreeting
• external/rust/crates/에 존재하는 libtextwrap

You use rust_library to create a new Rust library for Android.

Here we declare a dependency on two libraries:

• libgreeting, which we define below,
• libtextwrap, which is a crate already vendored in external/rust/crates/.

hello_rust/Android.bp:

rust_binary {
    name: "hello_rust_with_dep",
    crate_name: "hello_rust_with_dep",
    srcs: ["src/main.rs"],
    rustlibs: [
        "libgreetings",
        "libtextwrap",
    ],
    prefer_rlib: true,
}

rust_library {
    name: "libgreetings",
    crate_name: "greetings",
    srcs: ["src/lib.rs"],
}

hello_rust/src/main.rs:

//! Rust demo.

use greetings::greeting;
use textwrap::fill;

/// Prints a greeting to standard output.
fn main() {
    println!("{}", fill(&greeting("Bob"), 24));
}

hello_rust/src/lib.rs:

//! Greeting library.

/// Greet `name`.
pub fn greeting(name: &str) -> String {
    format!("Hello {name}, it is very nice to meet you!")
}

이제 이전과 같이 바이너리를 빌드, 푸시, 실행할 수 있습니다: You build, push, and run the binary like before:

$ m hello_rust_with_dep
$ adb push $ANDROID_PRODUCT_OUT/system/bin/hello_rust_with_dep /data/local/tmp
$ adb shell /data/local/tmp/hello_rust_with_dep
Hello Bob, it is very
nice to meet you!