11-23 09:44:56.947: D/dalvikvm(1585): GC_FOR_MALLOC freed 3278 objects / 311568 bytes in 31ms
rejecting opcode 0x21 at 0x000a
rejected Lorg/apache/log4j/config/PropertySetter;.getPropertyDescriptor
(Ljava/lang/String;)Ljava/beans/PropertyDescriptor;
Verifier rejected class Lorg/apache/log4j/config/PropertySetter;
Exception Ljava/lang/VerifyError; thrown during Lorg/apache/log4j/LogManager;.
Shutting down VM
threadid=1: thread exiting with uncaught exception (group=0x400259f8)
FATAL EXCEPTION: main
java.lang.ExceptionInInitializerError
at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:64)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:253)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:265)
...
Caused by: java.lang.VerifyError: org.apache.log4j.config.PropertySetter
at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:772)
at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:735)
at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:615)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:502)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:547)
at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:483)
at org.apache.log4j.LogManager.(LogManager.java:127)
... 20 more
因此,可以另外多下载一个叫android-logging-log4j的项目,地址在:
http://code.google.com/p/android-logging-log4j/downloads/list,注意,原本的log4j还是需要的。
在AndroidManifest.xml中,增加如下设置:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
然后在程序中如下使用:
package com.android.myapp; . import java.io.File; import org.apache.log4j.Level; import org.apache.log4j.Logger; . import android.app.Application; import android.os.Environment; import de.mindpipe.android.logging.log4j.LogConfigurator; . public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); LogConfigurator logConfigurator = new LogConfigurator(); logConfigurator.setFileName(Environment.getExternalStorageDirectory() + File.separator + "MyApp" + File.separator + "logs" + File.separator + "log4j.txt"); logConfigurator.setRootLevel(Level.DEBUG); logConfigurator.setLevel("org.apache", Level.ERROR); logConfigurator.setFilePattern("%d %-5p [%c{2}]-[%L] %m%n"); logConfigurator.setMaxFileSize(1024 * 1024 * 5); logConfigurator.setImmediateFlush(true); logConfigurator.configure(); Logger log = Logger.getLogger(MyApplication.class); log.info("My Application Created"); } }
现在日志则是以:
Environment.getExternalStorageDirectory() + File.separator + "MyApp" + File.separator + "logs" + File.separator + "log4j.txt
的方式保存了。其他和log4j的用法差不多了。