11. Android框架和工具之 Logger（调试代码）

1. Logger
Logger是android是一个简单、漂亮、功能强大的Android日志程序。
日志程序提供了 :
线程信息Thread information
类信息Class information
方法信息Method information
漂亮打印的JSON内容Pretty-print for json content
Clean output
Jump to source feature
Gradle

　　compile 'com.orhanobut:logger:1.3'
2. 使用Logger，如下：
  1 package com.himi.loggerdemo;
  2 
  3 import java.io.File;
  4 import java.io.FileInputStream;
  5 import java.io.FileNotFoundException;
  6 import java.io.FileOutputStream;
  7 import java.io.IOException;
  8 import java.io.InputStream;
  9 
 10 import org.json.JSONException;
 11 import org.json.JSONObject;
 12 import org.json.JSONStringer;
 13 import org.xmlpull.v1.XmlPullParser;
 14 import org.xmlpull.v1.XmlPullParserException;
 15 import org.xmlpull.v1.XmlSerializer;
 16 
 17 import com.orhanobut.logger.Logger;
 18 
 19 import android.app.Activity;
 20 import android.os.Bundle;
 21 import android.util.Log;
 22 import android.util.Xml;
 23 
 24 public class MainActivity extends Activity {
 25 
 26     private static final String TAG = "MainActivity";
 27 
 28     @Override
 29     protected void onCreate(Bundle savedInstanceState) {
 30         super.onCreate(savedInstanceState);
 31         setContentView(R.layout.activity_main);
 32 
 33         Log.d(TAG, "from Log");
 34 
 35         // 必须初始化Logger,不然会空指针
 36         Logger.init("myLogger");
 37 
 38         Logger.d("from Logger");
 39         Logger.e("hello");
 40         Logger.w("hello");
 41         Logger.v("hello");
 42 
 43         Logger.wtf("hello");
 44 
 45         // 生成一个JSON数据
 46         JSONObject json = new JSONObject();
 47         try {
 48             json.put("title", "book1").put("price", "$11");
 49             Logger.json(json.toString());
 50         } catch (JSONException e) {
 51             // TODO Auto-generated catch block
 52             e.printStackTrace();
 53         }
 54 
 55         // 生成一个xml数据
 56         try {
 57             File file = new File(getFilesDir(), "data.xml");
 58             FileOutputStream os = new FileOutputStream(file);
 59 
 60             XmlSerializer serializer = Xml.newSerializer();
 61 
 62             serializer.setOutput(os, "utf-8");
 63             serializer.startDocument("utf-8", true);
 64             serializer.startTag(null, "student");
 65             serializer.startTag(null, "name");
 66             serializer.text("hebao");
 67             serializer.endTag(null, "name");
 68             serializer.startTag(null, "num");
 69             serializer.text("24");
 70             serializer.endTag(null, "num");
 71 
 72             serializer.endTag(null, "student");
 73             serializer.endDocument();
 74             os.close();
 75 
 76             XmlPullParser parser = Xml.newPullParser();
 77             // 2.设置解析器的参数
 78             InputStream inputStream = new FileInputStream(file);
 79             parser.setInput(inputStream, "utf-8");
 80             int type = parser.getEventType();
 81             StringBuilder sb = new StringBuilder();
 82             while (type != XmlPullParser.END_DOCUMENT) {
 83                 switch (type) {
 84                 case XmlPullParser.START_TAG:
 85                     if ("name".equals(parser.getName())) {
 86                         // 这是name节点
 87                         String name = parser.nextText();
 88                         sb.append("--name:" + name);
 89                     } else if ("num".equals(parser.getName())) {
 90                         // 这是name节点
 91                         String num = parser.nextText();
 92                         sb.append("--num:" + num);
 93                     }
 94                     break;
 95                 }
 96                 type = parser.next();// 让解析器解析下一个元素
 97             }
 98             inputStream.close();
 99             String text = sb.toString();
100 
101             Logger.xml(text);
102 
103         } catch (FileNotFoundException e) {
104             // TODO Auto-generated catch block
105             e.printStackTrace();
106         } catch (IllegalArgumentException e) {
107             // TODO Auto-generated catch block
108             e.printStackTrace();
109         } catch (IllegalStateException e) {
110             // TODO Auto-generated catch block
111             e.printStackTrace();
112         } catch (IOException e) {
113             // TODO Auto-generated catch block
114             e.printStackTrace();
115         } catch (XmlPullParserException e) {
116             // TODO Auto-generated catch block
117             e.printStackTrace();
118         }
119 
120     }
121 
122 }
查看Logcat，如下：