崩溃 日志

Caused by: java.lang.NullPointerException
       at android.os.Environment.getExternalStorageState(Environment.java:654)
       at com.easemob.util.FileLogger.getStorageDir()
       at com.easemob.util.FileLogger.getLogRoot()
       at com.easemob.util.FileLogger.startThreadService()
       at com.easemob.util.FileLogger.e()
       at com.easemob.util.EMLog.e()
       at com.easemob.chat.EMChat.init()