slf4j-android fixed

Tired of slf4j-android not logging your debug messages? Tired of android logger hiding your UnknownHostException or other exceptions not appearing? Use this fork of the standard slf4j-android logger.

Features

• Shows DEBUG messages during the development: http://jira.qos.ch/browse/SLF4J-314
• Does not hide any exceptions, even exceptions hidden by buggy Android Studio 1.5. Fixes https://code.google.com/p/android/issues/detail?id=195164 https://code.google.com/p/android/issues/detail?id=194446 http://stackoverflow.com/questions/28897239/log-e-does-not-print-the-stack-trace-of-unknownhostexception
• Supports Crashlytics; when Crashlytics jar is included in your project then slf4-handroid will automatically log using Crashlytics.log() and Crashlytics.logException() instead of using plain Android logger.

Using with your project

slf4j-handroid is now at jcenter, so all you have to do is to add this to your project dependencies:

dependencies {
  compile 'sk.baka.slf4j:slf4j-handroid:1.7.25-3'
}

If this won't work, add the jcenter repo:

repositories {
    jcenter()
}

Then, just update the HandroidLoggerAdapter.DEBUG field to appropriate value. Good practice is to log debug during development, while not logging debug messages during production. You can achieve this by adding a constructor to your android.app.Application and:

HandroidLoggerAdapter.DEBUG = BuildConfig.DEBUG;
HandroidLoggerAdapter.ANDROID_API_LEVEL = Build.VERSION.SDK_INT;
HandroidLoggerAdapter.APP_NAME = "MyApp";

Then, replace all calls to Android built-in Log class by slf4j logging, for example:

public class YourClass {
  private static final Logger log = LoggerFactory.getLogger(YourClass.class);
  public void foo() {
    log.error("Something failed", new RuntimeException("something"));
  }
}

Since you have configured the APP_NAME, the log messages will look like this:

06-18 13:05:35.937 17994-17994/sk.baka.aedictkanjidrawpractice I/MyApp:SodIndex: Parsed SOD header with 6576 kanjis in 18ms
06-18 13:05:36.011 17994-17994/sk.baka.aedictkanjidrawpractice I/MyApp:MainActivity: Launched MainActivity for kanji 政 with stroke count 9

Just make sure that the app name is 10 character long tops (since the log name limit is only 23 characters), otherwise your class names will get chopped.

Unfortunately I can't take advantage of the fact that the tag text is no longer constrained to 23 characters on Androids 24 and newer, because in reality that is not true: see bug #2 for details.