Android日志服务例子，将日志保存在文件中并每天产生一个日志文件

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();
        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
                            +    "MyApp" + 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("*: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);
    }

}

 最后不要忘记在配置文件中

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