android-logcat

A simple Rust library for Android logcat. This library provides a simple interface to the Android logging system.

Usage

Add this to your Cargo.toml:

[dependencies]
android-logcat = "0.1"

Basic Usage

You can use the Log struct to log messages with different priorities.

use android_logcat::Log;

Log::info("MyTag", "This is an info message");
Log::error("MyTag", "This is an error message");

Global Logger

For convenience, you can initialize a global logger with a default tag.

use android_logcat::Log;

// In your app's initialization code
Log::init("MyAppTag", false);

// Later in your code
Log::i("Info message using the global tag");
Log::e("Error message using the global tag");

Using macros

use android_logcat;

// In global tag
android_logcat::i!("Info message {}", "Hello World!");
android_logcat::d!("Debug message {}", "Hello World!");

// In custom tag
android_logcat::d!(tag: "MyAppTag", "Debug message {}", "Hello World!");

Disable control

use android_logcat::Log;

// default status is `enable`.

// diseanble
Log::enabled(false);
let curr_status = Log::is_enabled();

// reenable
Log::enabled(true);
let curr_status = Log::is_enabled();

With log crate

This library can be used as a backend for the log crate.

Change this to your Cargo.toml:

[dependencies]
android-logcat = "0.1"
log = "0.4"

use android_logcat::Log;
use log::{info, error};

// In your app's initialization code
// Set the second parameter to true to mix in with the log crate
Log::init("MyAppTag", true);

// Now you can use the macros from the log crate
info!("This will be logged with MyAppTag");
error!("This is another error message");

expect_log for Result and Option

The ExpectLogcat trait provides a convenient way to handle Result and Option types. If the value is Err or None, it logs an error message and then panics.

use android_logcat::ExpectLogcat;

fn might_fail() -> Result<(), &'static str> {
    Err("something went wrong")
}

fn run() {
    might_fail().expect_log("Failed to run");
}

This will log an error with the message "Failed to run: something went wrong" and then panic.

It works similarly for Option:

use android_logcat::ExpectLogcat;

let an_option: Option<i32> = None;
let value = an_option.expect_log("The option was None!");

This will log an error with the message "The option was None!" and then panic.

License

This project is licensed under the Apache-2.0 license. See the LICENSE.txt file for details.