Android Log method

Package test;

 Public Abstract classLogger {Private Staticclass<?extendsLogger> Mloggerclass =NULL;  Public Static Final BooleanDBG =true;  Public Static FinalString TAG =NULL;  Public Static FinalString line = "------->"; PrivateString Mtag;  PublicLogger () {} PublicLogger (String tag) { This. Mtag =tag; }     Public Static voidRegisterlogger (class<?extendsLogger>Loggerclass) {Logger.mloggerclass=Loggerclass; }     Public Static voidUnregisterlogger () {Logger.mloggerclass=NULL; }     Public StaticLogger GetLogger (String tag) {tag= "[" + Tag + "]"; Logger Logger=NULL; if(Mloggerclass! =NULL) {            Try{Logger=mloggerclass.newinstance (); Logger.mtag=tag; } Catch(instantiationexception e) {e.printstacktrace (); } Catch(illegalaccessexception e) {e.printstacktrace (); }        }        if(Logger = =NULL) {Logger=NewLog (tag); }        returnlogger; }     PublicString Gettag () {returnMtag; }     Public voidd (string tag, string str) {Debug (Mtag+ Line +str); }     Public voidI (string tag, string str) {info (Mtag+ Line +str); }     Public voidW (string tag, string str) {warn (Mtag+ Line +str); }     Public voide (string tag, string str) {error (Mtag+ Line +str); }     Public voidd (string tag, string str, Throwable tr) {debug (Mtag+ Line +str, TR); }     Public voidI (string tag, string str, Throwable tr) {info (Mtag+ Line +str, TR); }     Public voidW (string tag, string str, Throwable tr) {warn (Mtag+ Line +str, TR); }     Public voide (string tag, string str, Throwable tr) {error (Mtag+ Line +str, TR); }    protected Abstract voidDebug (String str); protected Abstract voidinfo (String str); protected Abstract voidwarn (String str); protected Abstract voiderror (String str); protected Abstract voidDebug (String str, throwable tr); protected Abstract voidinfo (String str, throwable tr); protected Abstract voidwarn (String str, throwable tr); protected Abstract voiderror (String str, throwable tr);}

 Packagetest;ImportJava.io.File;ImportJava.io.FileOutputStream;ImportJava.io.PrintStream;Importjava.util.Date;Importandroid.os.Environment; Public classLogextendsLogger {Private Static FinalString App_tag = "Renwuto"; Private Static FinalString log_file_name = "Renwuto.txt"; Private StaticPrintStream LogStream; Private Static FinalString Log_entry_format = "[%tf%tt]%s";  PublicLog (String name) {Super(name); } @Overrideprotected voidDebug (String str) {ANDROID.UTIL.LOG.D (App_tag, str); Write (str,NULL); } @Overrideprotected voiderror (String str) {ANDROID.UTIL.LOG.E (App_tag, str); Write (str,NULL); } @Overrideprotected voidinfo (String str) {ANDROID.UTIL.LOG.I (App_tag, str); Write (str,NULL); } @Overrideprotected voidwarn (String str) {ANDROID.UTIL.LOG.W (App_tag, str); Write (str,NULL); } @Overrideprotected voidDebug (String str, throwable tr) {ANDROID.UTIL.LOG.D (App_tag, str);    Write (str, TR); } @Overrideprotected voiderror (String str, throwable tr) {ANDROID.UTIL.LOG.E (App_tag, str);    Write (str, TR); } @Overrideprotected voidinfo (String str, throwable tr) {android.util.log.i (App_tag, str);    Write (str, TR); } @Overrideprotected voidwarn (String str, throwable tr) {ANDROID.UTIL.LOG.W (App_tag, str);    Write (str, TR); }    Private voidWrite (String msg, throwable tr) {if(!log.dbg) {return; }        Try {            if(NULL==LogStream) {                synchronized(Log.class) {                    if(NULL==LogStream)                    {init (); }}} Date now=NewDate (); if(NULL!=LogStream)                {logstream.printf (Log_entry_format, now, now, MSG); Logstream.print ("\ n"); }            if(NULL!=TR)                {tr.printstacktrace (LogStream); if(NULL!=LogStream) {Logstream.print ("\ n"); }            }        } Catch(Throwable t) {//Empty Catch block        }    }     Public Static voidinit () {if(!log.dbg) {return; }        Try{File Sdroot=NULL; String State=environment.getexternalstoragestate (); if(Environment.MEDIA_MOUNTED.equals (state)) {Sdroot=environment.getexternalstoragedirectory (); }            if(Sdroot! =NULL) {File logFile=NewFile (Sdroot, log_file_name); ANDROID.UTIL.LOG.D (App_tag,"Log to File:" +logFile); LogStream=NewPrintStream (NewFileOutputStream (LogFile,true),true); }        } Catch(Throwable e) {//Empty Catch block}} @Overrideprotected voidFinalize ()throwsThrowable {Try {            Super. Finalize (); if(LogStream! =NULL) {logstream.close (); }        } Catch(Throwable t) {//Empty Catch block        }    }}

Android Log method