| commit | c6a999020b54e2106d756bc2a73741b6a1d319f3 | [log] [tgz] |
|---|---|---|
| author | Matthew Maurer <[email protected]> | Thu Feb 17 20:23:37 2022 +0000 |
| committer | Matthew Maurer <[email protected]> | Thu Feb 17 20:26:32 2022 +0000 |
| tree | 3426a2899ee5859d207b1b7f62709958becbb000 | |
| parent | a2ecb87179ed02db814781a4ac5fbb973701c583 [diff] |
Support selecting target log buffer Android has several different log buffers. Previously, this library would only support logging to the "Main" log. Now, it logs to the default log (which is Main for most processes), with the option to override which log buffer you send messages to in the config. Bug: 215419883 Test: Boot with keystore2 set to use System log, verify log results Change-Id: I72779e62bd963586e3dfad431cd82c75daf04d92
This library is a drop-in replacement for env_logger. Instead, it outputs messages to android's logcat.
This only works on Android and requires linking to log which is only available under android. With Cargo, it is possible to conditionally require this library:
[target.'cfg(target_os = "android")'.dependencies] android_logger = "0.10"
Example of initialization on activity creation, with log configuration:
#[macro_use] extern crate log; extern crate android_logger; use log::Level; use android_logger::{Config,FilterBuilder}; fn native_activity_create() { android_logger::init_once( Config::default() .with_min_level(Level::Trace) // limit log level .with_tag("mytag") // logs will show under mytag tag .with_filter( // configure messages for specific crate FilterBuilder::new() .parse("debug,hello::crate=error") .build()) ); trace!("this is a verbose {}", "message"); error!("this is printed by default"); }
To allow all logs, use the default configuration with min level Trace:
#[macro_use] extern crate log; extern crate android_logger; use log::Level; use android_logger::Config; fn native_activity_create() { android_logger::init_once( Config::default().with_min_level(Level::Trace)); }
There is a caveat that this library can only be initialized once (hence the init_once function name). However, Android native activity can be re-created every time the screen is rotated, resulting in multiple initialization calls. Therefore this library will only log a warning for subsequent init_once calls.
This library ensures that logged messages do not overflow Android log message limits by efficiently splitting messages into chunks.
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