tony19 / logback-android

📄The reliable, generic, fast and flexible logging framework for Android

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Overview

logback-android is a lite version of logback that runs on Android. This library provides a highly configurable logging framework for Android apps, supporting multiple log destinations simultaneously:

  • files
  • SQLite databases
  • logcat
  • sockets
  • syslog
  • email

See Wiki for documentation.

For logback-android@1.x, see the 1.x branch.

Quick Start

  1. Create a new "Basic Activity" app in Android Studio.

  2. In app/build.gradle, add the following dependencies:

    dependencies {
      implementation 'org.slf4j:slf4j-api:2.0.7'
      implementation 'com.github.tony19:logback-android:3.0.0'
    }

    If using logback-android in unit tests, either use Robolectric, or use this config instead:

    dependencies {
      implementation 'org.slf4j:slf4j-api:2.0.7'
      implementation 'com.github.tony19:logback-android:3.0.0'
      testImplementation 'ch.qos.logback:logback-classic:1.2.11'
    }
    
    configurations.testImplementation {
      exclude module: 'logback-android'
    }
  3. Create app/src/main/assets/logback.xml containing:

    <configuration
      xmlns="https://tony19.github.io/logback-android/xml"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="https://tony19.github.io/logback-android/xml https://cdn.jsdelivr.net/gh/tony19/logback-android/logback.xsd"
    >
      <appender name="logcat" class="ch.qos.logback.classic.android.LogcatAppender">
        <tagEncoder>
          <pattern>%logger{12}</pattern>
        </tagEncoder>
        <encoder>
          <pattern>[%-20thread] %msg</pattern>
        </encoder>
      </appender>
    
      <root level="DEBUG">
        <appender-ref ref="logcat" />
      </root>
    </configuration>
  4. In MainActivity.java, add the following imports:

    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
  5. ...and modify onOptionsItemSelected() to log "hello world":

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        Logger log = LoggerFactory.getLogger(MainActivity.class);
        log.info("hello world");
        // ...
    }
  6. Build and start the app.

  7. Open logcat for your device (via the Android Monitor tab in Android Studio).

  8. Click the app menu, and select the menu-option. You should see "hello world" in logcat.

Download

Gradle release

dependencies {
  implementation 'org.slf4j:slf4j-api:2.0.7'
  implementation 'com.github.tony19:logback-android:3.0.0'
}

Gradle snapshot (unstable)

repositories {
  maven { url 'https://oss.sonatype.org/content/repositories/snapshots' }
}

dependencies {
  implementation 'org.slf4j:slf4j-api:2.0.7'
  implementation 'com.github.tony19:logback-android:3.0.1-SNAPSHOT'
}

Build

Use these commands to create the AAR:

git clone git://github.com/tony19/logback-android.git
cd logback-android
scripts/makejar.sh

The file is output to:

./build/logback-android-3.0.0-debug.aar

Release

  1. CD into ./scripts/release.

  2. Install deps: npm install

  3. Make sure local.properties contains the following keys, required to sign artifacts and upload to Maven Central:

    # output from `gpg --export-secret-keys <PUBKEY_LAST8> | base64`
    signing.key=
    # PUBKEY_LAST8 from `gpg --list-keys` (last 8 digits of pub key)
    signing.keyId=
    # password for key (can be empty if key has no password)
    signing.password=
    # path to secring.gpg file from `gpg --keyring secring.gpg --export-secret-keys > ~/.gnupg/secring.gpg`
    signing.secretKeyRingFile=/Users/tony/.gnupg/secring.gpg
    # OSS sonatype username at https://issues.sonatype.org
    ossrhUsername=
    # OSS sonatype password at https://issues.sonatype.org
    ossrhPassword=
    # profile ID from https://oss.sonatype.org/#stagingProfiles (select profile, and copy profile ID from hash in address bar)
    sonatypeStagingProfileId=b2413418ab44f
  4. Do a dry-run: npm run start --dry

  5. If everything looks good, rerun without --dry.

  6. Confirm the artifacts were uploaded in https://repo1.maven.org/maven2/com/github/tony19/logback-android/3.0.0/.

About

📄The reliable, generic, fast and flexible logging framework for Android

License:Apache License 2.0


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