Infinum Android Talks #14 - Log4j
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The document discusses the benefits and features of using log4j for logging in Android applications, emphasizing the ability to enable and change log levels at runtime without significant performance impact. It introduces the android-logging-log4j library, which simplifies logging implementation while maintaining log4j's capabilities. Additionally, it provides instructions for integrating the library into projects and highlights the various log levels supported.
![Log anything
!
OUTPUT:
2014-07-02 18:34:52,762 -
[ERROR::root::com.example.ivankocijan.log4jexample.MyActivity] - something](https://image.slidesharecdn.com/log4j-160829074232/85/Infinum-Android-Talks-14-Log4j-7-320.jpg)
![Custom logger
OUTPUT:
2014-07-02 18:34:52,769 - [ERROR::This is my logger::
com.example.ivankocijan.log4jexample.MyActivity] - something else](https://image.slidesharecdn.com/log4j-160829074232/85/Infinum-Android-Talks-14-Log4j-8-320.jpg)
Infinum Android Talks #14 - Log4j
- 2. Why? • It is possible to enable logging at runtime • It’s possible to change log levels at runtime • Log statements can stay in production ape without incurring a heavy performance cost • It gives the developer detailed context for application failures • The target of the log output can be a file, an OutputStream, a java.io.Writer, a remote log4j server… • Automatic backup
- 3. Android-logging-log4j • We will not use log4J directly • Android-logging-log4j is a library build on top of log4j • Makes logging very simple while keeping all log4j features
- 4. How to add it in your project? • Add two lines of code to your build.gradle file
- 5. Set manifest permission <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
- 7. Log anything ! OUTPUT: 2014-07-02 18:34:52,762 - [ERROR::root::com.example.ivankocijan.log4jexample.MyActivity] - something
- 8. Custom logger OUTPUT: 2014-07-02 18:34:52,769 - [ERROR::This is my logger:: com.example.ivankocijan.log4jexample.MyActivity] - something else
- 9. Log levels • OFF • FATAL • ERROR • WARN • INFO • DEBUG • TRACE • ALL
- 10. Log4j 2 • Still in beta • API Separation - core is separated from logger API • Improved Performance • Plugin Architecture • ….
- 11. Resources • http://logging.apache.org/log4j/1.2/manual.html • https://code.google.com/p/android-logging-log4j/ • http://mindpipe.blogspot.com/2011/11/android-log4j-exception-properties.html • http://logging.apache.org/log4j/2.x/ • http://gradleplease.appspot.com/