11. Android框架和工具之 Logger（调试代码）

Gradle

 package com.himi.loggerdemo;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONStringer;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlSerializer;

import com.orhanobut.logger.Logger;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.util.Xml;

public class MainActivity extends Activity {

private static final String TAG = "MainActivity";

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

Log.d(TAG, "from Log");

// 必须初始化Logger,不然会空指针
Logger.init("myLogger");

Logger.d("from Logger");
Logger.e("hello");
Logger.w("hello");
Logger.v("hello");

Logger.wtf("hello");

// 生成一个JSON数据
JSONObject json = new JSONObject();
try {
json.put("title", "book1").put("price", "$11");
Logger.json(json.toString());
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

// 生成一个xml数据
try {
File file = new File(getFilesDir(), "data.xml");
FileOutputStream os = new FileOutputStream(file);

XmlSerializer serializer = Xml.newSerializer();

serializer.setOutput(os, "utf-8");
serializer.startDocument("utf-8", true);
serializer.startTag(null, "student");
serializer.startTag(null, "name");
serializer.text("hebao");
serializer.endTag(null, "name");
serializer.startTag(null, "num");
serializer.text("24");
serializer.endTag(null, "num");

serializer.endTag(null, "student");
serializer.endDocument();
os.close();

XmlPullParser parser = Xml.newPullParser();
// 2.设置解析器的参数
InputStream inputStream = new FileInputStream(file);
parser.setInput(inputStream, "utf-8");
int type = parser.getEventType();
StringBuilder sb = new StringBuilder();
while (type != XmlPullParser.END_DOCUMENT) {
switch (type) {
case XmlPullParser.START_TAG:
if ("name".equals(parser.getName())) {
// 这是name节点
String name = parser.nextText();
sb.append("--name:" + name);
} else if ("num".equals(parser.getName())) {
// 这是name节点
String num = parser.nextText();
sb.append("--num:" + num);
}
break;
}
type = parser.next();// 让解析器解析下一个元素
}
inputStream.close();
String text = sb.toString();

Logger.xml(text);

} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (XmlPullParserException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}