Logger日志管理工具类

 

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.PrintWriter;

import java.io.StringWriter;

import java.util.Date;

 

import org.apache.commons.lang3.time.DateFormatUtils;

 

import android.os.Environment;

import android.util.Log;

 

public class Logger {

        private static int LOGLEVEL = 6;

        private static int VERBISE = 1;

        private static int DEBUG = 2;

        private static int INFO = 3;

        private static int WARN = 4;

        private static int ERROR = 5;

 

        // 根据需要将Log存放到SD卡中

        private static String path;

        private static File file;

        private static FileOutputStream outputStream;

        private static String pattern = "yyyy-MM-dd HH:mm:ss";

 

        static {

                if (Utils.checkSD()) {

                        File externalStorageDirectory = Environment

                                        .getExternalStorageDirectory();

                        path = externalStorageDirectory.getAbsolutePath() + "/Log/";

                        File directory = new File(path);

                        if (!directory.exists()) {

                                directory.mkdirs();

                        }

                        file = new File(new File(path), "Log.txt");

                        try {

                                outputStream = new FileOutputStream(file, true);

                        } catch (FileNotFoundException e) {

                                e.printStackTrace();

                        }

                }

        }

 

        public static void v(String tag, String msg) {

                if (LOGLEVEL > VERBISE) {

                        Log.v(tag, msg);

                }

        }

 

        public static void d(String tag, String msg) {

                if (LOGLEVEL > DEBUG) {

                        Log.d(tag, msg);

                }

        }

 

        public static void i(String tag, String msg) {

                if (LOGLEVEL > INFO) {

                        Log.i(tag, msg);

                }

        }

 

        public static void w(String tag, String msg) {

                if (LOGLEVEL > WARN) {

                        Log.w(tag, msg);

                }

        }

 

        public static void e(String tag, String msg) {

                if (LOGLEVEL > ERROR) {

                        Log.e(tag, msg);

                }

        }

 

        /**

         * 将错误信息保存到SD卡中去！可选的操作！

         *

         * @param msg

         * 传递的String类型

         */

        public static void save2Sd(String msg) {

                Date date = new Date();

                String time = DateFormatUtils.format(date, pattern);

                save(time, msg);

        }

 

        /**

         * 将错误信息保存到SD卡中去！可选的操作！

         *

         * @param e

         * 传递的是Exception类型

         */

        public static void save2Sd(Exception e) {

                Date date = new Date();

                String time = DateFormatUtils.format(date, pattern);

                StringWriter writer = new StringWriter();

                PrintWriter pw = new PrintWriter(writer);

                e.printStackTrace(pw);

                String msg = writer.toString();

                save(time, msg);

        }

 

        /**

         * 保存的核心方法

         * @param time 保存的时间

         * @param msg 保存的信息

         */

        private static void save(String time, String msg) {

                if (Utils.checkSD()) {

                        if (outputStream != null) {

                                try {

                                        outputStream.write(time.getBytes());

                                        outputStream.write("\r\n".getBytes());

                                        outputStream.write(msg.getBytes());

                                        outputStream.write("\r\n".getBytes());

                                        outputStream.flush();

                                } catch (IOException ex) {

                                        ex.printStackTrace();

                                }

                        } else {

                                android.util.Log.i("SDCAEDTAG", "file is null");

                        }

                }

        }

}