[转]Android输出Log到文件

前言：开发中遇到mx4这款机型Eclipse联调不上，logcat看不了，需要输出生成文件查看调试信息。网上搜了下，功能很完善了。startService和过滤输出信息需要自己添加设置，另外注意添加权限：

<uses-permission android:name="android.permission.READ_LOGS"/>

<uses-permission android:name="android.permission.WAKE_LOCK" />

另外：可以把只包含调试信息“cocos2dx”到输出筛选处理：grep -i cocos2d-x 2015-09-09\ 145323.log  > cocos2dx.log

package com.funcity.funm;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Comparator;
import java.util.Date;
import java.util.List;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Environment;
import android.os.IBinder;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.util.Log;

/**
* 日志服务，日志默认会存储在SDcar里如果没有SDcard会存储在内存中的安装目录下面。
* 1.本服务默认在SDcard中每天生成一个日志文件,
* 2.如果有SDCard的话会将之前内存中的文件拷贝到SDCard中
* 3.如果没有SDCard，在安装目录下只保存当前在写日志
* 4.SDcard的装载卸载动作会在步骤2,3中切换
* 5.SDcard中的日志文件只保存7天
* @author Administrator
*
*/
public class LogService extends Service {
        private static final String TAG = "LogService";

        private static final int MEMORY_LOG_FILE_MAX_SIZE = 10 * 1024 * 1024;                        //内存中日志文件最大值，10M
        private static final int MEMORY_LOG_FILE_MONITOR_INTERVAL = 10 * 60 * 1000;                //内存中的日志文件大小监控时间间隔，10分钟
        private static final int SDCARD_LOG_FILE_SAVE_DAYS = 7;                                                        //sd卡中日志文件的最多保存天数

        private String LOG_PATH_MEMORY_DIR;                //日志文件在内存中的路径(日志文件在安装目录中的路径)
        private String LOG_PATH_SDCARD_DIR;                //日志文件在sdcard中的路径
        @SuppressWarnings("unused")
        private String LOG_SERVICE_LOG_PATH;        //本服务产生的日志，记录日志服务开启失败信息

        private final int SDCARD_TYPE = 0;                        //当前的日志记录类型为存储在SD卡下面
        private final int MEMORY_TYPE = 1;                        //当前的日志记录类型为存储在内存中
        private int CURR_LOG_TYPE = SDCARD_TYPE;        //当前的日志记录类型

        private String CURR_INSTALL_LOG_NAME;        //如果当前的日志写在内存中，记录当前的日志文件名称

        private String logServiceLogName = "Log.log";//本服务输出的日志文件名称
        private SimpleDateFormat myLogSdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        private OutputStreamWriter writer;

        private SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HHmmss");//日志名称格式

        private Process process;

        private WakeLock wakeLock;  

        private SDStateMonitorReceiver sdStateReceiver; //SDcard状态监测
        private LogTaskReceiver logTaskReceiver;

        /* 是否正在监测日志文件大小；
         * 如果当前日志记录在SDcard中则为false
         * 如果当前日志记录在内存中则为true*/
        private boolean logSizeMoniting = false;               

        private static String MONITOR_LOG_SIZE_ACTION = "MONITOR_LOG_SIZE";                //日志文件监测action
        private static String SWITCH_LOG_FILE_ACTION = "SWITCH_LOG_FILE_ACTION";        //切换日志文件action

        @Override
        public IBinder onBind(Intent intent) {
                return null;
        }

        @Override
        public void onCreate() {
                super.onCreate();
                Log.v("and_log", "LogService onCreate");
                init();
                register();
                deploySwitchLogFileTask();
                new LogCollectorThread().start();
        }

        private void init(){
                LOG_PATH_MEMORY_DIR = getFilesDir().getAbsolutePath() + File.separator + "log";
                LOG_SERVICE_LOG_PATH = LOG_PATH_MEMORY_DIR + File.separator + logServiceLogName;
                LOG_PATH_SDCARD_DIR = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator
                                                        +        "mxzg_log" + File.separator + "log";
                createLogDir();

                /* ******************************************************
                try {
                        writer = new OutputStreamWriter(new FileOutputStream(
                                        LOG_SERVICE_LOG_PATH, true));
                } catch (FileNotFoundException e) {
                        Log.e(TAG, e.getMessage(), e);
                }
                * ******************************************************/
                PowerManager pm = (PowerManager) getApplicationContext().getSystemService(Context.POWER_SERVICE);
                wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);

                CURR_LOG_TYPE = getCurrLogType();
                Log.i(TAG, "LogService onCreate");
        }

        private void register(){
                IntentFilter sdCarMonitorFilter = new IntentFilter();
                sdCarMonitorFilter.addAction(Intent.ACTION_MEDIA_MOUNTED);
                sdCarMonitorFilter.addAction(Intent.ACTION_MEDIA_UNMOUNTED);
                sdCarMonitorFilter.addDataScheme("file");
                sdStateReceiver = new SDStateMonitorReceiver();
                registerReceiver(sdStateReceiver, sdCarMonitorFilter);

                IntentFilter logTaskFilter = new IntentFilter();
                logTaskFilter.addAction(MONITOR_LOG_SIZE_ACTION);
                logTaskFilter.addAction(SWITCH_LOG_FILE_ACTION);
                logTaskReceiver = new LogTaskReceiver();
                registerReceiver(logTaskReceiver,logTaskFilter);
        }

        /**
         * 获取当前应存储在内存中还是存储在SDCard中
         * @return
         */
        public int getCurrLogType(){
                if (!Environment.getExternalStorageState().equals(
                                Environment.MEDIA_MOUNTED)) {
                        return MEMORY_TYPE;
                }else{
                        return SDCARD_TYPE;
                }
        }

        /**
         * 部署日志切换任务，每天凌晨切换日志文件
         */
        private void deploySwitchLogFileTask() {
                Intent intent = new Intent(SWITCH_LOG_FILE_ACTION);
                PendingIntent sender = PendingIntent.getBroadcast(this, 0, intent, 0);
                Calendar calendar = Calendar.getInstance();
                calendar.add(Calendar.DAY_OF_MONTH, 1);
                calendar.set(Calendar.HOUR_OF_DAY, 0);
                calendar.set(Calendar.MINUTE, 0);
                calendar.set(Calendar.SECOND, 0);

                // 部署任务
                AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
                am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, sender);
                recordLogServiceLog("deployNextTask succ,next task time is:"+myLogSdf.format(calendar.getTime()));
        }

        /**
         * 日志收集
         * 1.清除日志缓存
         * 2.杀死应用程序已开启的Logcat进程防止多个进程写入一个日志文件
         * 3.开启日志收集进程
         * 4.处理日志文件
         *   移动 OR 删除
         */
        class LogCollectorThread extends Thread {

                public LogCollectorThread(){
                        super("LogCollectorThread");
                        Log.d(TAG, "LogCollectorThread is create");
                }

                @Override
                public void run() {
                        try {
                                wakeLock.acquire();        //唤醒手机

                                clearLogCache();

                                List<String> orgProcessList = getAllProcess();
                                List<ProcessInfo> processInfoList = getProcessInfoList(orgProcessList);
                                killLogcatProc(processInfoList);

                                createLogCollector();

                                Thread.sleep(1000);//休眠，创建文件，然后处理文件，不然该文件还没创建，会影响文件删除

                                handleLog();

                                wakeLock.release();        //释放
                        } catch (Exception e) {
                                e.printStackTrace();
                                recordLogServiceLog(Log.getStackTraceString(e));
                        }
                }
        }

        /**
         * 每次记录日志之前先清除日志的缓存, 不然会在两个日志文件中记录重复的日志
         */
        private void clearLogCache() {
                Process proc = null;
                List<String> commandList = new ArrayList<String>();
                commandList.add("logcat");
                commandList.add("-c");
                try {
                        proc = Runtime.getRuntime().exec(
                                        commandList.toArray(new String[commandList.size()]));
                        StreamConsumer errorGobbler = new StreamConsumer(proc
                                        .getErrorStream());

                        StreamConsumer outputGobbler = new StreamConsumer(proc
                                        .getInputStream());

                        errorGobbler.start();
                        outputGobbler.start();
                        if (proc.waitFor() != 0) {
                                Log.e(TAG, " clearLogCache proc.waitFor() != 0");
                                recordLogServiceLog("clearLogCache clearLogCache proc.waitFor() != 0");
                        }
                } catch (Exception e) {
                        Log.e(TAG, "clearLogCache failed", e);
                        recordLogServiceLog("clearLogCache failed");
                } finally {
                        try {
                                proc.destroy();
                        } catch (Exception e) {
                                Log.e(TAG, "clearLogCache failed", e);
                                recordLogServiceLog("clearLogCache failed");
                        }
                }
        }

        /**
         * 关闭由本程序开启的logcat进程：
         * 根据用户名称杀死进程(如果是本程序进程开启的Logcat收集进程那么两者的USER一致)
         * 如果不关闭会有多个进程读取logcat日志缓存信息写入日志文件
         *
         * @param allProcList
         * @return
         */
        private void killLogcatProc(List<ProcessInfo> allProcList) {
                if(process != null){
                        process.destroy();
                }
                String packName = this.getPackageName();
                String myUser = getAppUser(packName, allProcList);
                /*
                recordLogServiceLog("app user is:"+myUser);
                recordLogServiceLog("========================");
                for (ProcessInfo processInfo : allProcList) {
                        recordLogServiceLog(processInfo.toString());
                }
                recordLogServiceLog("========================");
                */
                for (ProcessInfo processInfo : allProcList) {
                        if (processInfo.name.toLowerCase().equals("logcat")
                                        && processInfo.user.equals(myUser)) {
                                android.os.Process.killProcess(Integer
                                                .parseInt(processInfo.pid));
                                //recordLogServiceLog("kill another logcat process success,the process info is:"
                                //                + processInfo);
                        }
                }
        }

        /**
         * 获取本程序的用户名称
         *
         * @param packName
         * @param allProcList
         * @return
         */
        private String getAppUser(String packName, List<ProcessInfo> allProcList) {
                for (ProcessInfo processInfo : allProcList) {
                        if (processInfo.name.equals(packName)) {
                                return processInfo.user;
                        }
                }
                return null;
        }

        /**
         * 根据ps命令得到的内容获取PID，User，name等信息
         *
         * @param orgProcessList
         * @return
         */
        private List<ProcessInfo> getProcessInfoList(List<String> orgProcessList) {
                List<ProcessInfo> procInfoList = new ArrayList<ProcessInfo>();
                for (int i = 1; i < orgProcessList.size(); i++) {
                        String processInfo = orgProcessList.get(i);
                        String[] proStr = processInfo.split(" ");
                        // USER PID PPID VSIZE RSS WCHAN PC NAME
                        // root 1 0 416 300 c00d4b28 0000cd5c S /init
                        List<String> orgInfo = new ArrayList<String>();
                        for (String str : proStr) {
                                if (!"".equals(str)) {
                                        orgInfo.add(str);
                                }
                        }
                        if (orgInfo.size() == 9) {
                                ProcessInfo pInfo = new ProcessInfo();
                                pInfo.user = orgInfo.get(0);
                                pInfo.pid = orgInfo.get(1);
                                pInfo.ppid = orgInfo.get(2);
                                pInfo.name = orgInfo.get(8);
                                procInfoList.add(pInfo);
                        }
                }
                return procInfoList;
        }

        /**
         * 运行PS命令得到进程信息
         *
         * @return
         *                         USER PID PPID VSIZE RSS WCHAN PC NAME
         *                         root 1 0 416 300 c00d4b28 0000cd5c S /init
         */
        private List<String> getAllProcess() {
                List<String> orgProcList = new ArrayList<String>();
                Process proc = null;
                try {
                        proc = Runtime.getRuntime().exec("ps");
                        StreamConsumer errorConsumer = new StreamConsumer(proc
                                        .getErrorStream());

                        StreamConsumer outputConsumer = new StreamConsumer(proc
                                        .getInputStream(), orgProcList);

                        errorConsumer.start();
                        outputConsumer.start();
                        if (proc.waitFor() != 0) {
                                Log.e(TAG, "getAllProcess proc.waitFor() != 0");
                                recordLogServiceLog("getAllProcess proc.waitFor() != 0");
                        }
                } catch (Exception e) {
                        Log.e(TAG, "getAllProcess failed", e);
                        recordLogServiceLog("getAllProcess failed");
                } finally {
                        try {
                                proc.destroy();
                        } catch (Exception e) {
                                Log.e(TAG, "getAllProcess failed", e);
                                recordLogServiceLog("getAllProcess failed");
                        }
                }
                return orgProcList;
        }

        /**
         * 开始收集日志信息
         */
        public void createLogCollector() {
                String logFileName = sdf.format(new Date()) + ".log";// 日志文件名称
                List<String> commandList = new ArrayList<String>();
                commandList.add("logcat");
                commandList.add("-f");
                //commandList.add(LOG_PATH_INSTALL_DIR + File.separator + logFileName);
                commandList.add(getLogPath());
                commandList.add("-v");
                commandList.add("time");
                commandList.add("*:I");
                commandList.add("*:D");

                //commandList.add("*:E");// 过滤所有的错误信息

                // 过滤指定TAG的信息
//                 commandList.add("MyAPP:V");
                // commandList.add("*:S");
                try {
                        process = Runtime.getRuntime().exec(
                                        commandList.toArray(new String[commandList.size()]));
                        recordLogServiceLog("start collecting the log,and log name is:"+logFileName);
                        // process.waitFor();
                } catch (Exception e) {
                        Log.e(TAG, "CollectorThread == >" + e.getMessage(), e);
                        recordLogServiceLog("CollectorThread == >" + e.getMessage());
                }
        }

        /**
         * 根据当前的存储位置得到日志的绝对存储路径
         * @return
         */
        public String getLogPath(){
                createLogDir();
                String logFileName = sdf.format(new Date()) + ".log";// 日志文件名称
                if(CURR_LOG_TYPE == MEMORY_TYPE){
                        CURR_INSTALL_LOG_NAME = logFileName;
                        Log.d(TAG, "Log stored in memory, the path is:"+LOG_PATH_MEMORY_DIR + File.separator + logFileName);
                        return LOG_PATH_MEMORY_DIR + File.separator + logFileName;
                }else{
                        CURR_INSTALL_LOG_NAME = null;
                        Log.d(TAG, "Log stored in SDcard, the path is:"+LOG_PATH_SDCARD_DIR + File.separator + logFileName);
                        return LOG_PATH_SDCARD_DIR + File.separator + logFileName;
                }
        }

        /**
         * 处理日志文件
         * 1.如果日志文件存储位置切换到内存中，删除除了正在写的日志文件
         *   并且部署日志大小监控任务，控制日志大小不超过规定值
         * 2.如果日志文件存储位置切换到SDCard中，删除7天之前的日志，移
         *            动所有存储在内存中的日志到SDCard中，并将之前部署的日志大小
         *   监控取消
         */
        public void handleLog(){
                if(CURR_LOG_TYPE == MEMORY_TYPE){
                        deployLogSizeMonitorTask();
                        deleteMemoryExpiredLog();
                }else{
                        moveLogfile();
                        cancelLogSizeMonitorTask();
                        deleteSDcardExpiredLog();
                }
        }

        /**
         * 部署日志大小监控任务
         */
        private void deployLogSizeMonitorTask() {
                if(logSizeMoniting){        //如果当前正在监控着，则不需要继续部署
                        return;
                }
                logSizeMoniting = true;
                Intent intent = new Intent(MONITOR_LOG_SIZE_ACTION);
                PendingIntent sender = PendingIntent.getBroadcast(this, 0, intent, 0);
                AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
                am.setRepeating(AlarmManager.RTC_WAKEUP,System.currentTimeMillis(), MEMORY_LOG_FILE_MONITOR_INTERVAL, sender);
                Log.d(TAG, "deployLogSizeMonitorTask() succ !");
                //recordLogServiceLog("deployLogSizeMonitorTask() succ ,start time is " + calendar.getTime().toLocaleString());
        }

        /**
         * 取消部署日志大小监控任务
         */
        private void cancelLogSizeMonitorTask() {
                logSizeMoniting = false;
                AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
                Intent intent = new Intent(MONITOR_LOG_SIZE_ACTION);
                PendingIntent sender = PendingIntent.getBroadcast(this, 0, intent, 0);
                am.cancel(sender);

                Log.d(TAG, "canelLogSizeMonitorTask() succ");
        }

        /**
         * 检查日志文件大小是否超过了规定大小
         * 如果超过了重新开启一个日志收集进程
         */
        private void checkLogSize(){
                if(CURR_INSTALL_LOG_NAME != null && !"".equals(CURR_INSTALL_LOG_NAME)){
                        String path = LOG_PATH_MEMORY_DIR + File.separator + CURR_INSTALL_LOG_NAME;
                        File file = new File(path);
                        if(!file.exists()){
                                return;
                        }
                        Log.d(TAG, "checkLog() ==> The size of the log is too big?");
                        if(file.length() >= MEMORY_LOG_FILE_MAX_SIZE){
                                Log.d(TAG, "The log's size is too big!");
                                new LogCollectorThread().start();
                        }
                }
        }

        /**
         * 创建日志目录
         */
        private void createLogDir() {
                File file = new File(LOG_PATH_MEMORY_DIR);
                boolean mkOk;
                if (!file.isDirectory()) {
                        mkOk = file.mkdirs();
                        if (!mkOk) {
                                mkOk = file.mkdirs();
                        }
                }

                /* ************************************
                file = new File(LOG_SERVICE_LOG_PATH);
                if (!file.exists()) {
                        try {
                                mkOk = file.createNewFile();
                                if (!mkOk) {
                                        file.createNewFile();
                                }
                        } catch (IOException e) {
                                Log.e(TAG, e.getMessage(), e);
                        }
                }
                * ************************************/

                if (Environment.getExternalStorageState().equals(
                                Environment.MEDIA_MOUNTED)) {
                        file = new File(LOG_PATH_SDCARD_DIR);
                        if (!file.isDirectory()) {
                                mkOk = file.mkdirs();
                                if (!mkOk) {
                                        recordLogServiceLog("move file failed,dir is not created succ");
                                        return;
                                }
                        }
                }
        }

        /**
         * 将日志文件转移到SD卡下面
         */
        private void moveLogfile() {
                if (!Environment.getExternalStorageState().equals(
                                Environment.MEDIA_MOUNTED)) {
                        //recordLogServiceLog("move file failed, sd card does not mount");
                        return;
                }
                File file = new File(LOG_PATH_SDCARD_DIR);
                if (!file.isDirectory()) {
                        boolean mkOk = file.mkdirs();
                        if (!mkOk) {
                                //recordLogServiceLog("move file failed,dir is not created succ");
                                return;
                        }
                }

                file = new File(LOG_PATH_MEMORY_DIR);
                if (file.isDirectory()) {
                        File[] allFiles = file.listFiles();
                        for (File logFile : allFiles) {
                                String fileName = logFile.getName();
                                if (logServiceLogName.equals(fileName)) {
                                        continue;
                                }
                                //String createDateInfo = getFileNameWithoutExtension(fileName);
                                boolean isSucc = copy(logFile, new File(LOG_PATH_SDCARD_DIR
                                                        + File.separator + fileName));
                                if (isSucc) {
                                        logFile.delete();
                                        //recordLogServiceLog("move file success,log name is:"+fileName);
                                }
                        }
                }
        }

        /**
         * 删除内存下过期的日志
         */
        private void deleteSDcardExpiredLog() {
                File file = new File(LOG_PATH_SDCARD_DIR);
                if (file.isDirectory()) {
                        File[] allFiles = file.listFiles();
                        for (File logFile : allFiles) {
                                String fileName = logFile.getName();
                                if (logServiceLogName.equals(fileName)) {
                                        continue;
                                }
                                String createDateInfo = getFileNameWithoutExtension(fileName);
                                if (canDeleteSDLog(createDateInfo)) {
                                        logFile.delete();
                                        Log.d(TAG, "delete expired log success,the log path is:"
                                                        + logFile.getAbsolutePath());

                                }
                        }
                }
        }

        /**
         * 判断sdcard上的日志文件是否可以删除
         * @param createDateStr
         * @return
         */
        public boolean canDeleteSDLog(String createDateStr) {
                boolean canDel = false;
                Calendar calendar = Calendar.getInstance();
                calendar.add(Calendar.DAY_OF_MONTH, -1 * SDCARD_LOG_FILE_SAVE_DAYS);//删除7天之前日志
                Date expiredDate = calendar.getTime();
                try {
                        Date createDate = sdf.parse(createDateStr);
                        canDel = createDate.before(expiredDate);
                } catch (ParseException e) {
                        Log.e(TAG, e.getMessage(), e);
                        canDel = false;
                }
                return canDel;
        }

        /**
         * 删除内存中的过期日志，删除规则：
         * 除了当前的日志和离当前时间最近的日志保存其他的都删除
         */
        private void deleteMemoryExpiredLog(){
                File file = new File(LOG_PATH_MEMORY_DIR);
                if (file.isDirectory()) {
                        File[] allFiles = file.listFiles();
                        Arrays.sort(allFiles, new FileComparator());
                        for (int i=0;i<allFiles.length-2;i++) {        //"-2"保存最近的两个日志文件
                                File _file =  allFiles[i];
                                if (logServiceLogName.equals(_file.getName()) ||  _file.getName().equals(CURR_INSTALL_LOG_NAME)) {
                                        continue;
                                }
                                _file.delete();
                                Log.d(TAG, "delete expired log success,the log path is:"+_file.getAbsolutePath());
                        }
                }
        }

        /**
         * 拷贝文件
         * @param source
         * @param target
         * @return
         */
        private boolean copy(File source, File target) {
                FileInputStream in = null;
                FileOutputStream out = null;
                try {
                        if(!target.exists()){
                                boolean createSucc = target.createNewFile();
                                if(!createSucc){
                                        return false;
                                }
                        }
                        in = new FileInputStream(source);
                        out = new FileOutputStream(target);
                        byte[] buffer = new byte[8*1024];
                        int count;
                        while ((count = in.read(buffer)) != -1) {
                                out.write(buffer, 0, count);
                        }
                        return true;
                } catch (Exception e) {
                        e.printStackTrace();
                        Log.e(TAG, e.getMessage(), e);
                        recordLogServiceLog("copy file fail");
                        return false;
                } finally{
                        try {
                                if(in != null){
                                        in.close();
                                }
                                if(out != null){
                                        out.close();
                                }
                        } catch (IOException e) {
                                e.printStackTrace();
                                Log.e(TAG, e.getMessage(), e);
                                recordLogServiceLog("copy file fail");
                                return false;
                        }
                }

        }

        /**
         * 记录日志服务的基本信息 防止日志服务有错，在LogCat日志中无法查找
         * 此日志名称为Log.log
         *
         * @param msg
         */
        private void recordLogServiceLog(String msg) {
                if (writer != null) {
                        try {
                                Date time = new Date();
                                writer.write(myLogSdf.format(time) + " : " + msg);
                                writer.write("\n");
                                writer.flush();
                        } catch (IOException e) {
                                e.printStackTrace();
                                Log.e(TAG, e.getMessage(), e);
                        }
                }
        }

        /**
         * 去除文件的扩展类型（.log）
         * @param fileName
         * @return
         */
        private String getFileNameWithoutExtension(String fileName){
                return fileName.substring(0, fileName.indexOf("."));
        }

        class ProcessInfo {
                public String user;
                public String pid;
                public String ppid;
                public String name;

                @Override
                public String toString() {
                        String str = "user=" + user + " pid=" + pid + " ppid=" + ppid
                                        + " name=" + name;
                        return str;
                }
        }
        class StreamConsumer extends Thread {
                InputStream is;
                List<String> list;

                StreamConsumer(InputStream is) {
                        this.is = is;
                }

                StreamConsumer(InputStream is, List<String> list) {
                        this.is = is;
                        this.list = list;
                }

                public void run() {
                        try {
                                InputStreamReader isr = new InputStreamReader(is);
                                BufferedReader br = new BufferedReader(isr);
                                String line = null;
                                while ((line = br.readLine()) != null) {
                                        if (list != null) {
                                                list.add(line);
                                        }
                                }
                        } catch (IOException ioe) {
                                ioe.printStackTrace();
                        }
                }
        }

        /**
         * 监控SD卡状态
         * @author Administrator
         *
         */
        class SDStateMonitorReceiver extends BroadcastReceiver{
                public void onReceive(Context context, Intent intent) {

                        if(Intent.ACTION_MEDIA_UNMOUNTED.equals(intent.getAction())){        //存储卡被卸载
                                if(CURR_LOG_TYPE == SDCARD_TYPE){
                                        Log.d(TAG, "SDcar is UNMOUNTED");
                                        CURR_LOG_TYPE = MEMORY_TYPE;
                                        new LogCollectorThread().start();
                                }
                        }else{                                                                                                                        //存储卡被挂载
                                if(CURR_LOG_TYPE == MEMORY_TYPE){
                                        Log.d(TAG, "SDcar is MOUNTED");
                                        CURR_LOG_TYPE = SDCARD_TYPE;
                                        new LogCollectorThread().start();

                                }
                        }
                }
        }

        /**
         * 日志任务接收
         * 切换日志，监控日志大小
         * @author Administrator
         *
         */
        class LogTaskReceiver extends BroadcastReceiver{
                public void onReceive(Context context, Intent intent) {
                        String action = intent.getAction();
                        if(SWITCH_LOG_FILE_ACTION.equals(action)){
                                new LogCollectorThread().start();
                        }else if(MONITOR_LOG_SIZE_ACTION.equals(action)){
                                checkLogSize();
                        }
                }
        }

        class FileComparator implements Comparator<File>{
                public int compare(File file1, File file2) {
                        if(logServiceLogName.equals(file1.getName())){
                                return -1;
                        }else if(logServiceLogName.equals(file2.getName())){
                                return 1;
                        }

                        String createInfo1 = getFileNameWithoutExtension(file1.getName());
                        String createInfo2 = getFileNameWithoutExtension(file2.getName());

                        try {
                                Date create1 = sdf.parse(createInfo1);
                                Date create2 = sdf.parse(createInfo2);
                                if(create1.before(create2)){
                                        return -1;
                                }else{
                                        return 1;
                                }
                        } catch (ParseException e) {
                                return 0;
                        }
                }
        }

        @Override
        public void onDestroy() {
                super.onDestroy();
                recordLogServiceLog("LogService onDestroy");
                if (writer != null) {
                        try {
                                writer.close();
                        } catch (IOException e) {
                                e.printStackTrace();
                        }
                }
                if (process != null) {
                        process.destroy();
                }

                unregisterReceiver(sdStateReceiver);
                unregisterReceiver(logTaskReceiver);
        }

}

转自：Android的log保存到文件上查看