Logger of Android Framework (debug code)

1. Logger

Logger is Android is a simple, beautiful, powerful Android log program.

The Log program provides:

• Threading Information Thread Information
• Class Information Classes Information
• Methods Information Method Information
• Beautiful printed JSON content Pretty-print for JSON contents
• Clean output
• Jump to Source feature

Gradle

Compile ' com.orhanobut:logger:1.3 '

2. Use the logger as follows:

1  PackageCom.himi.loggerdemo;2 3 ImportJava.io.File;4 ImportJava.io.FileInputStream;5 Importjava.io.FileNotFoundException;6 ImportJava.io.FileOutputStream;7 Importjava.io.IOException;8 ImportJava.io.InputStream;9 Ten Importorg.json.JSONException; One ImportOrg.json.JSONObject; A ImportOrg.json.JSONStringer; - ImportOrg.xmlpull.v1.XmlPullParser; - Importorg.xmlpull.v1.XmlPullParserException; the ImportOrg.xmlpull.v1.XmlSerializer; -  - ImportCom.orhanobut.logger.Logger; -  + Importandroid.app.Activity; - ImportAndroid.os.Bundle; + ImportAndroid.util.Log; A Importandroid.util.Xml; at  -  Public classMainactivityextendsActivity { -  -     Private Static FinalString TAG = "Mainactivity"; -  - @Override in     protected voidonCreate (Bundle savedinstancestate) { -         Super. OnCreate (savedinstancestate); to Setcontentview (r.layout.activity_main); +  -LOG.D (TAG, "from Log"); the  *         //logger must be initialized, otherwise null pointer $Logger.init ("MyLogger");Panax Notoginseng  -LOGGER.D ("From Logger"); theLOGGER.E ("Hello"); +LOGGER.W ("Hello"); ALOGGER.V ("Hello"); the  +LOGGER.WTF ("Hello"); -  $         //generate a JSON data $Jsonobject JSON =NewJsonobject (); -         Try { -Json.put ("title", "Book1"). Put ("Price", "$11"); the Logger.json (json.tostring ()); -}Catch(jsonexception e) {Wuyi             //TODO auto-generated Catch block the e.printstacktrace (); -         } Wu  -         //generate an XML data About         Try { $File File =NewFile (Getfilesdir (), "Data.xml"); -FileOutputStream OS =Newfileoutputstream (file); -  -XmlSerializer serializer =Xml.newserializer (); A  +Serializer.setoutput (OS, "Utf-8")); theSerializer.startdocument ("Utf-8",true); -Serializer.starttag (NULL, "Student"); $Serializer.starttag (NULL, "name"); theSerializer.text ("Hebao"); theSerializer.endtag (NULL, "name"); theSerializer.starttag (NULL, "Num"); theSerializer.text ("24"); -Serializer.endtag (NULL, "Num"); in  theSerializer.endtag (NULL, "Student"); the serializer.enddocument (); About os.close (); the  theXmlpullparser parser =Xml.newpullparser (); the             //2. Setting parameters for the parser +InputStream InputStream =Newfileinputstream (file); -Parser.setinput (InputStream, "Utf-8"); the             intType =Parser.geteventtype ();BayiStringBuilder SB =NewStringBuilder (); the              while(Type! =xmlpullparser.end_document) { the                 Switch(type) { -                  CaseXmlpullparser.start_tag: -                     if("Name". Equals (Parser.getname ())) { the                         //This is the name node theString name =Parser.nexttext (); theSb.append ("--name:" +name); the}Else if("Num". Equals (Parser.getname ())) { -                         //This is the name node theString num =Parser.nexttext (); theSb.append ("--num:" +num); the                     }94                      Break; the                 } theType = Parser.next ();//Let the parser parse the next element the             }98 inputstream.close (); AboutString Text =sb.tostring (); - 101 logger.xml (text);102 103}Catch(FileNotFoundException e) {104             //TODO auto-generated Catch block the e.printstacktrace ();106}Catch(IllegalArgumentException e) {107             //TODO auto-generated Catch block108 e.printstacktrace ();109}Catch(IllegalStateException e) { the             //TODO auto-generated Catch block111 e.printstacktrace (); the}Catch(IOException e) {113             //TODO auto-generated Catch block the e.printstacktrace (); the}Catch(xmlpullparserexception e) { the             //TODO auto-generated Catch block117 e.printstacktrace ();118         }119  -     }121 122}

View the Logcatas follows:

Logger of Android Framework (debug code)