Android将需要的日志文件LOG记录到本地文件夹下指定的文件

package com.mapbar.android.obd.util;import android.os.Environment;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;/** * Created by sunxx on 2017/12/14. * 日志文件 */public  class Logs {    public static String TIRE_TAG="1";    public static String PHY_TAG="2";    public static String STATE_TAG="3";    public static boolean isDebug=false;    public final static String FILE_PATH = "/aa/bb";//包名文件夹    public static File file;    public  static FileOutputStream fos;    public static Logs logs;    public Logs() {    }    public static synchronized Logs getInstance(){        String path = Environment.getExternalStorageDirectory().getAbsolutePath() + FILE_PATH + "/log/a.txt";        try {                file = new File(path);                                  fos = new FileOutputStream(file, true);                   } catch (FileNotFoundException e) {            e.printStackTrace();        }        if (logs==null){            logs=new Logs();        }        return logs;    }    //写入日志文件    public  void writeEvent(String tag,String msg){        if (!isDebug){            return;        }        if (fos==null){            return;        }        try        {            fos.write((TimeFormatUtil.formatStrLong(System.currentTimeMillis())+"|"+tag+"|"+msg+"\r").getBytes());            fos.flush();            fos.close();        }        catch (FileNotFoundException e)        {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }}

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