当我尝试导出我的 Android 项目时，Proguard 会抱怨。这是我遇到的错误。
[2012-12-17 16:52:46] Proguard returned with error code 1. See console
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class java.lang.management.ManagementFactory
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.remote.JMXServiceURL
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.remote.JMXServiceURL
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.remote.JMXConnectorFactory
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.remote.JMXConnector
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.remote.JMXConnector
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.ObjectName
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.ObjectName
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.MBeanServerConnection
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.ObjectName
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.MBeanServerConnection
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.JMException
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.InstanceNotFoundException
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.ReflectionException
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.AttributeNotFoundException
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.MBeanException
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class java.lang.management.ManagementFactory
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.remote.JMXConnectorFactory
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.remote.JMXConnector
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.MBeanServerConnection
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.MBeanServerConnection
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.MBeanServerConnection
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.MBeanServerConnection
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.remote.JMXServiceURL
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.remote.JMXConnector
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.MBeanServerConnection
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.ObjectName
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.ObjectName
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.ObjectName
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.ObjectName
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.openmbean.CompositeData
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.ObjectName
[2012-12-17 16:52:46] Warning: com.mongodb.tools.ConnectionPoolStat: can't find referenced class javax.management.ObjectName
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class java.lang.management.ManagementFactory
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.MBeanServer
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.MBeanServer
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.InstanceNotFoundException
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.MBeanRegistrationException
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.MBeanServer
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.InstanceAlreadyExistsException
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.NotCompliantMBeanException
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.ObjectName
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.ObjectName
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.MalformedObjectNameException
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class java.lang.management.ManagementFactory
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.MBeanServer
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.MBeanServer
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.InstanceNotFoundException
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.MBeanRegistrationException
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.InstanceAlreadyExistsException
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.MBeanRegistrationException
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.NotCompliantMBeanException
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.ObjectName
[2012-12-17 16:52:46] Warning: com.mongodb.util.management.jmx.JMXMBeanServer: can't find referenced class javax.management.MalformedObjectNameException
[2012-12-17 16:52:46] Warning: org.bson.types.ObjectId: can't find referenced class java.lang.management.ManagementFactory
[2012-12-17 16:52:46] Warning: org.bson.types.ObjectId: can't find referenced class java.lang.management.RuntimeMXBean
[2012-12-17 16:52:46] Warning: org.bson.types.ObjectId: can't find referenced class java.lang.management.ManagementFactory
[2012-12-17 16:52:46] Warning: org.bson.types.ObjectId: can't find referenced class java.lang.management.RuntimeMXBean
[2012-12-17 16:52:46] You should check if you need to specify additional program jars.
[2012-12-17 16:52:46] Warning: there were 75 unresolved references to classes or interfaces.
[2012-12-17 16:52:46] You may need to specify additional library jars (using '-libraryjars').
[2012-12-17 16:52:46] java.io.IOException: Please correct the above warnings first.
[2012-12-17 16:52:46] at proguard.Initializer.execute(Initializer.java:321)
[2012-12-17 16:52:46] at proguard.ProGuard.initialize(ProGuard.java:211)
[2012-12-17 16:52:46] at proguard.ProGuard.execute(ProGuard.java:86)
[2012-12-17 16:52:46] at proguard.ProGuard.main(ProGuard.java:492)
解决这些错误的必要 Proguard 说明是什么？谢谢。