| commit | bbc9c23d620e2e7d5d84f6d4a8fbacde5eedab8e | [log] [tgz] |
|---|---|---|
| author | Andrew Walbran <qwandor@google.com> | Thu Jul 23 08:37:48 2020 +0000 |
| committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | Thu Jul 23 08:37:48 2020 +0000 |
| tree | 0d89907585fcb14ab150e4347c60907c26687ad0 | |
| parent | fdf114f6d632a3342cc733916c5867ba6e022942 [diff] | |
| parent | b5d680ccbff60e2ae00bb50b8d34aad9b8412cac [diff] |
Update to latest upstream version. am: b5d680ccbf Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/android_logger/+/1370138 Change-Id: I3cc71a154276a446d9951b10b7af848294f48ee8
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 = "0.9"
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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