LOG4J in Android

问题:

I have Java Project with lot of files, which is using LOG4J. Now I am trying to Port it to Android platform. Is it possible to reuse the code as-it is, with LOG4J function calls?

Current understanding:

1. Property configuration won't work (beans dependency)
2. I tried with LOG4J for Android and SL4J Lib. No success.

Working. But no use

org.apache.log4j.Logger root = org.apache.log4j.Logger.getRootLogger();
final SocketAppender appender = new SocketAppender("192.168.123.123", 3333);
root.addAppender(appender);

// SLF4J - Not working
org.slf4j.Logger logger;
logger = LoggerFactory.getLogger(MyClass.class); 

// LOG4J for Android - Not working
ConfigureLog4J.configure();
logger = Logger.getLogger( MyClass.class );

Am I missing something?? Pointer to any working examples?

回答1:

Solved by using the android-logging-log4j.jar.

Here is sample code:

public class ALogger {
    public static org.apache.log4j.Logger getLogger(Class clazz) {
        final LogConfigurator logConfigurator = new LogConfigurator();
        logConfigurator.setFileName(Environment.getExternalStorageDirectory().toString() + File.separator + "log/file.log");
        logConfigurator.setRootLevel(Level.ALL);
        logConfigurator.setLevel("org.apache", Level.ALL);
        logConfigurator.setUseFileAppender(true);
        logConfigurator.setFilePattern("%d %-5p [%c{2}]-[%L] %m%n");
        logConfigurator.setMaxFileSize(1024 * 1024 * 5);
        logConfigurator.setImmediateFlush(true);
        logConfigurator.configure();
        Logger log = Logger.getLogger(clazz);
        return log;
    }
}

In your code, replace the below lines:

PropertyConfigurator.configure(MY_PROP_FILE);
logger = Logger.getLogger( MyClaZZ.class );

With:

logger = ALogger.getLogger(MyClazz.class);

回答2:

My answer, that presents a more future-proof and lateral-thinking approach ;-).

I was using android-logging-log4j myself for some time, but it was causing massive warnings (which actually looked like errors) while dexing.

The log4j jar also had a lot of unnecessary stuff in it, like the Chainsaw logging UI (written in Swing, thus useless on Android).

I've switched to logback via https://github.com/tony19/logback-android . So far I'm happy. No more massive spam while building.

Plus, looks like log4j 1.x is not developed anymore, look at https://github.com/apache/log4j/tree/trunk - last commit many years ago.

And logback seems to be the successor.