Android 系统日志写入文件

yangchong211 / 文 发表于2018-07-04 20:07 次阅读 日志

目录介绍

  • 1.业务需求
  • 2.目前有那些做法及问题
  • 3.自定义log工具类,一边打印日志一边写入文件
  • 4.在application开启线程池进行日志打印
  • 5.写一个service将系统日志写到文件

关于链接

1.业务需求

  • 要求将app的系统日志都写入到指定的文件目录下的文件中
  • 要求写入文件达到一定大小后自动切换到下一个文件夹
  • 要求app在运行时,持续将日志写到文件中
  • 要求可以清除7天或者n天之前的日志文件
  • 要求有sd卡,写日志到sd卡文件;没有则写到内存卡;如果从无sd卡到有sd卡,那么可以切换路径
  • 关于代码地址可以参考:https://github.com/yangchong211/YCAudioPlayer

2.目前有那些做法及问题

  • 1.自定义log工具类,在输出日志的时候,可以将输出日志写到文件夹。不过只能记录priority5中状态日志
  • 2.在application开启线程池,然后调用PrintToFileUtil类(自己写的工具类)中setPrint方法。存在问题:app一直开启状态下,无法持续打印,还未找到原因
  • 3.开启app时,打开service服务,当app进程不杀死时,或者service不销毁时,会一直运行在后台,那么也可以处理打印日志逻辑。并且通过广播可以监听sd状态来达到切换日志路径的目的

3.自定义log工具类,一边打印日志一边写入文件

  • 3.1 直接调用代码如下所示:
public static void e(String msg) {
    if (isDebug){
        Log.e(TAG, msg);
        PrintToFileUtil.input2File(msg,"path");
    }
}
  • 3.2 工具类如下所示
/**
 * 将内容直接写过文件中,自己设置路径
 * 这个是一边打印日志,一边将日志写入到file
 * 不建议直接new一个子线程做写入逻辑,建议开启线程池,避免到处开启线程损耗性能
 * @param input                     写入内容
 * @param filePath                  路径
 * @return
 */
static boolean input2File(final String input, final String filePath) {
    if (sExecutor == null) {
        sExecutor = Executors.newScheduledThreadPool(5);
    }
    Future<Boolean> submit = sExecutor.submit(new Callable<Boolean>() {
        @Override
        public Boolean call() throws Exception {
            BufferedWriter bw = null;
            try {
                // 构造给定文件名的FileWriter对象,并使用布尔值指示是否追加写入的数据。
                FileWriter fileWriter = new FileWriter(filePath, true);
                bw = new BufferedWriter(fileWriter);
                bw.write(input);
                return true;
            } catch (IOException e) {
                e.printStackTrace();
                return false;
            } finally {
                try {
                    if (bw != null) {
                        bw.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    });
    try {
        return submit.get();
    } catch (InterruptedException e) {
        e.printStackTrace();
    } catch (ExecutionException e) {
        e.printStackTrace();
    }
    return false;
}

4.在application开启线程池进行日志打印

/**
 * 遇到问题:
 * 1.什么时候调用这个方法?
 * 2.为什么调用这个方法会造成程序无响应,卡在什么地方?
 * 3.如何避免造成线程堵塞
 * 4.当打印到一定日志后,如何切换到下一个.txt文件?
 * @param logPath
 */
public static void setPrint(String logPath){
    if (sExecutor == null) {
        sExecutor = Executors.newScheduledThreadPool(5);
    }

    //以xx月xx日为命名文件名,这样每天的文件都是不一样的
    Date now = new Date(System.currentTimeMillis());
    String format = FORMAT.format(now);
    String date = format.substring(0, 5);
    final String newLogPath = logPath +date;

    Future<Boolean> submit = sExecutor.submit(new Callable<Boolean>() {
        @Override
        public Boolean call() throws Exception {
            /*核心代码*/
            while(captureLogThreadOpen){
                /*命令的准备*/
                ArrayList<String> getLog = new ArrayList<>();
                getLog.add("logcat");
                getLog.add("-d");
                getLog.add("-v");
                getLog.add("time");
                ArrayList<String> clearLog = new ArrayList<>();
                clearLog.add("logcat");
                clearLog.add("-c");
                try{
                    //抓取当前的缓存日志
                    Process process = Runtime.getRuntime().exec(getLog.toArray(new String[getLog.size()]));
                    //获取输入流
                    BufferedReader buffRead = new BufferedReader(new InputStreamReader(process.getInputStream()));
                    //清除是为了下次抓取不会从头抓取
                    Runtime.getRuntime().exec(clearLog.toArray(new String[clearLog.size()]));

                    String str = null;
                    //打开文件
                    File logFile = new File(newLogPath + "log.txt");
                    //true表示在写的时候在文件末尾追加
                    FileOutputStream fos = new FileOutputStream(logFile, true);
                    //换行的字符串
                    String newline = System.getProperty("line.separator");
                    //Date date = new Date(System.currentTimeMillis());
                    //String time = format.format(date);

                    //Log.i(TAG, "thread");
                    //打印设备信息
                    fos.write(printDeviceInfo().getBytes());

                    while((str=buffRead.readLine())!=null){         //循环读取每一行
                        //Runtime.getRuntime().exec(clearLog.toArray(new String[clearLog.size()]));
                        //Log.i(TAG, str);
                        @SuppressLint("SimpleDateFormat")
                        Date date = new Date(System.currentTimeMillis());
                        String time = FORMAT.format(date);
                        //加上年
                        fos.write((time + str).getBytes());
                        //换行
                        fos.write(newline.getBytes());
                        logCount++;
                        //大于100000行就退出
                        if(logCount>100000){
                            captureLogThreadOpen = false;
                            fos.close();
                            break;
                        }
                    }
                    fos.close();
                    String[] strings = clearLog.toArray(new String[clearLog.size()]);
                    Runtime.getRuntime().exec(strings);
                    return true;
                }catch(Exception e){
                    e.printStackTrace();
                    return false;
                }
            }
            return true;
        }
    });

    try {
        submit.get();
    } catch (InterruptedException e) {
        e.printStackTrace();
    } catch (ExecutionException e) {
        e.printStackTrace();
    }
}

5.写一个service将系统日志写到文件

  • 5.1 文档要点

    • 1.支持自定义设置日志写入的路径和文件名称;
    • 2.如果有sd卡,那么就记录在sd卡中;否则记录到内存卡中;
    • 3.如果之前日志记录在内存卡中,后期有sd卡,那么会将之前内存中的文件拷贝到SDCard中
    • 4.可以监听sd卡装载和卸载广播,从而切换保存日志的保存路径
    • 5.sd卡中可以设置日志保存的最长周期,目前设置为7天
    • 6.当写入日志的文件大于自定义最大值(目前是10M),可以自动切换到下一个文件夹
    • 7.支持清除日志缓存,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
    • 8.收集的日志包括:d,v,e,w,c
    • 9.支持超出最长保存日期后自动删除文件逻辑,删除逻辑是:取以日期命名的文件名称与当前时间比较
    • 10.app开启的时候打开该服务service,那么service在运行的时候会一直记录日志并且写到文件,除非杀死服务
    • 11.建议日志命名按照日期命名,方便处理删除逻辑
  • 5.2 具体的实现代码

    • 5.2.1 在清单文件注册
      
      <service android:name=".service.LogService" />
    • 5.2.2 关于logService代码如下
public class LogService extends Service {

    //日志
    private static final String TAG = "LogService";

    //内存中日志文件最大值,10M
    private static final int MEMORY_LOG_FILE_MAX_SIZE = 10 * 1024 * 1024;
    //内存中的日志文件大小监控时间间隔,10分钟
    private static final int MEMORY_LOG_FILE_MONITOR_INTERVAL = 10 * 60 * 1000;
    //sd卡中日志文件的最多保存天数
    private static final int SDCARD_LOG_FILE_SAVE_DAYS = 7;
    //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_MEMORY_DIR;
    //日志文件在sdcard中的路径【主要这个很重要】
    private String LOG_PATH_SDCARD_DIR;

    //当前的日志记录类型为存储在SD卡下面
    private final int SDCARD_TYPE = 0;
    //当前的日志记录类型为存储在内存中
    private final int MEMORY_TYPE = 1;
    //当前的日志记录类型,默认是SD卡
    private int CURR_LOG_TYPE = SDCARD_TYPE;
    //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 CURR_INSTALL_LOG_NAME;
    //本服务输出的日志文件名称,也可以是txt格式,或者后缀名是.log
    private String logServiceLogName = "Log.log";

    @SuppressLint("SimpleDateFormat")
    private SimpleDateFormat myLogSdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    //日志名称格式
    @SuppressLint("SimpleDateFormat")
    private SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH时mm分ss秒");

    private OutputStreamWriter writer ;
    private Process process;

    //唤醒
    private PowerManager.WakeLock wakeLock;

    //SDCard状态监测,广播监听sd卡动态,比如用户拔下sd卡
    private SDStateMonitorReceiver sdStateReceiver;
    private LogTaskReceiver logTaskReceiver;

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

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

    /**
     * 无需绑定
     * @param intent            intent
     * @return                  IBinder对象
     */
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    /**
     * 销毁时调用该方法
     */
    @Override
    public void onDestroy() {
        super.onDestroy();
        recordLogServiceLog("LogService onDestroy");
        if (writer != null) {
            try {
                writer.close();
                writer = null;
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (process != null) {
            process.destroy();
        }

        //注意需要注销广播
        if(sdStateReceiver!=null){
            unregisterReceiver(sdStateReceiver);
        }
        if(logTaskReceiver!=null){
            unregisterReceiver(logTaskReceiver);
        }
    }

    /**
     * 每次开启service时,都会调用一次该方法,用于初始化
     */
    @Override
    public void onCreate() {
        super.onCreate();
        init();
        register();
        deploySwitchLogFileTask();
        new LogCollectorThread().start();
    }

    private void init(){
        //日志文件在内存中的路径(日志文件在安装目录中的路径)
        LOG_PATH_MEMORY_DIR = getFilesDir().getAbsolutePath() + File.separator + "log";
        //本服务产生的日志,记录日志服务开启失败信息
        String LOG_SERVICE_LOG_PATH = LOG_PATH_MEMORY_DIR + File.separator + logServiceLogName;
        //日志文件在sdcard中的路径
        LOG_PATH_SDCARD_DIR = FileUtils.getLocalRootSavePathDir("logger")+ File.separator + "log";

        //创建log文件夹
        createLogDir();

        try {
            //true 表示可以接着写入
            FileOutputStream fos = new FileOutputStream(LOG_SERVICE_LOG_PATH, true);
            writer = new OutputStreamWriter(fos);
        } catch (FileNotFoundException e) {
            Log.e(TAG, e.getMessage(), e);
        }

        //获取PowerManager管理者
        PowerManager pm = (PowerManager) getApplicationContext().getSystemService(Context.POWER_SERVICE);
        if (pm != null) {
            wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
        }

        //当前的日志记录类型
        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                  如果有sd卡,就放到sd卡中;没有则放到内存卡中
     */
    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);
        if (am != null) {
            am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, sender);
        }
        recordLogServiceLog("deployNextTask success,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 {

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

        @SuppressLint("WakelockTimeout")
        @Override
        public void run() {
            try {
                //唤醒手机
                wakeLock.acquire();
                //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
                clearLogCache();
                //运行PS命令得到进程信息
                List<String> orgProcessList = getAllProcess();
                //根据ps命令得到的内容获取PID,User,name等信息
                List<ProcessInfo> processInfoList = getProcessInfoList(orgProcessList);
                //关闭由本程序开启的logcat进程
                killLogcatPro(processInfoList);
                //开始收集日志信息
                createLogCollector();
                //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
                Thread.sleep(1000);
                //处理日志文件,这里面主要是处理sd卡和内存卡切换存储日志逻辑
                handleLog();
                //释放
                wakeLock.release();
            } 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 pro = null;
        List<String> commandList = new ArrayList<>();
        commandList.add("logcat");
        commandList.add("-c");
        try {
            pro = Runtime.getRuntime().exec(commandList.toArray(new String[commandList.size()]));
            StreamConsumer errorGobbler = new StreamConsumer(pro.getErrorStream());
            StreamConsumer outputGobbler = new StreamConsumer(pro.getInputStream());
            errorGobbler.start();
            outputGobbler.start();
            if (pro.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 {
                if (pro != null) {
                    pro.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 allPro                        allPro
     */
    private void killLogcatPro(List<ProcessInfo> allPro) {
        if(process != null){
            process.destroy();
        }
        String packName = this.getPackageName();
        //获取本程序的用户名称
        String myUser = getAppUser(packName, allPro);

        for (ProcessInfo processInfo : allPro) {
            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                              packName
     * @param allProList                            allProList
     * @return                                      程序名称
     */
    private String getAppUser(String packName, List<ProcessInfo> allProList) {
        for (ProcessInfo processInfo : allProList) {
            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                orgProcessList
     * @return                              集合
     */
    private List<ProcessInfo> getProcessInfoList(List<String> orgProcessList) {
        List<ProcessInfo> proInfoList = new ArrayList<>();
        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<>();
            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);
                proInfoList.add(pInfo);
            }
        }
        return proInfoList;
    }

    /**
     * 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> orgProList = new ArrayList<>();
        Process pro = null;
        try {
            pro = Runtime.getRuntime().exec("ps");
            StreamConsumer errorConsumer = new StreamConsumer(pro.getErrorStream());
            StreamConsumer outputConsumer = new StreamConsumer(pro.getInputStream(), orgProList);
            errorConsumer.start();
            outputConsumer.start();
            if (pro.waitFor() != 0) {
                Log.e(TAG, "getAllProcess pro.waitFor() != 0");
                recordLogServiceLog("getAllProcess pro.waitFor() != 0");
            }
        } catch (Exception e) {
            Log.e(TAG, "getAllProcess failed", e);
            recordLogServiceLog("getAllProcess failed");
        } finally {
            try {
                if (pro != null) {
                    pro.destroy();
                }
            } catch (Exception e) {
                Log.e(TAG, "getAllProcess failed", e);
                recordLogServiceLog("getAllProcess failed");
            }
        }
        return orgProList;
    }

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

        // 过滤所有的i信息
        commandList.add("*:I");

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

        // 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                      路径
     */
    public String getLogPath(){
        createLogDir();
        // 日志文件名称
        String logFileName = sdf.format(new Date()) + ".log";
        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(){
        //当前的日志记录类型为存储在内存中
        if(CURR_LOG_TYPE == MEMORY_TYPE){
            //部署日志大小监控任务
            deployLogSizeMonitorTask();
            //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
            deleteMemoryExpiredLog();
        }else{
            //将日志文件转移到SD卡下面
            moveLogfile();
            //取消部署日志大小监控任务
            cancelLogSizeMonitorTask();
            //删除内存下过期的日志
            deleteSDCardExpiredLog();
        }
    }

    /**
     * 部署日志大小监控任务
     */
    private void deployLogSizeMonitorTask() {
        //如果当前正在监控着,则不需要继续部署
        if(logSizeMoniting){
            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);
        if (am != null) {
            am.setRepeating(AlarmManager.RTC_WAKEUP,System.currentTimeMillis(), MEMORY_LOG_FILE_MONITOR_INTERVAL, sender);
        }
        Log.d(TAG, "deployLogSizeMonitorTask() suc !");
        //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);
        if (am != null) {
            am.cancel(sender);
        }
        Log.d(TAG, "canelLogSizeMonitorTask() suc");
    }

    /**
     * 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(){
        //当文件不为空时
        if(CURR_INSTALL_LOG_NAME != null && CURR_INSTALL_LOG_NAME.length()>0){
            //日志文件在内存中的路径+如果当前的日志写在内存中,记录当前的日志文件名称
            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?");
            //当文件长度>=10M时,重新创建一个新的文件夹
            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() {
        //日志文件在内存中的路径的文件夹
        File file = new File(LOG_PATH_MEMORY_DIR);
        boolean mkOk;
        if (!file.isDirectory() && file.exists()) {
            mkOk = file.mkdirs();
            if (!mkOk) {
                //noinspection ResultOfMethodCallIgnored
                file.mkdirs();
            }
        }

        //判断SD卡是否存在,并且是否具有读写权限
        //创建SD卡路径下的文件夹
        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");
                }
            }
        }
    }

    /**
     * 将日志文件转移到SD卡下面
     */
    private void moveLogfile() {
        //首先判断sd卡状态
        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);
                File beforeFile = new File(LOG_PATH_SDCARD_DIR + File.separator + fileName);
                boolean isSuccess = copy(logFile,beforeFile);
                if (isSuccess) {
                    //noinspection ResultOfMethodCallIgnored
                    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;
                }
                //去除文件的扩展类型
                String createDateInfo = getFileNameWithoutExtension(fileName);
                //判断sdcard上的日志文件是否可以删除
                if (canDeleteSDLog(createDateInfo)) {
                    //noinspection ResultOfMethodCallIgnored
                    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                     createDateStr
     * @return                                  是否可以删除
     */
    public boolean canDeleteSDLog(String createDateStr) {
        boolean canDel ;
        //获取当前时间
        Calendar calendar = Calendar.getInstance();
        //删除7天之前日志
        calendar.add(Calendar.DAY_OF_MONTH, -1 * SDCARD_LOG_FILE_SAVE_DAYS);
        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;
                }
                //noinspection ResultOfMethodCallIgnored
                _file.delete();
                Log.d(TAG, "delete expired log success,the log path is:"+_file.getAbsolutePath());
            }
        }
    }

    /**
     * 拷贝文件
     * @param source                    file
     * @param target                    file
     * @return                          是否拷贝成功
     */
    private boolean copy(File source, File target) {
        FileInputStream in = null;
        FileOutputStream out = null;
        try {
            if(!target.exists()){
                boolean createSuccess = target.createNewFile();
                if(!createSuccess){
                    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");
            }
        }
    }

    /**
     * 这个注意是记录错误的日志
     * 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                           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                          fileName
     * @return                                  字符串
     */
    private String getFileNameWithoutExtension(String fileName){
        return fileName.substring(0, fileName.indexOf("."));
    }

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

        @Override
        public String toString() {
            return "ProcessInfo{" +
                    "user='" + user + ''' +
                    ", pid='" + pid + ''' +
                    ", ppid='" + ppid + ''' +
                    ", name='" + name + ''' +
                    '}';
        }
    }

    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 ;
                while ((line = br.readLine()) != null) {
                    if (list != null) {
                        list.add(line);
                    }
                }
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }
    }

    /**
     * 监控SD卡状态
     * @author Administrator
     *
     */
    private class SDStateMonitorReceiver extends BroadcastReceiver {
        public void onReceive(Context context, Intent intent) {
            //存储卡被卸载
            if(Intent.ACTION_MEDIA_UNMOUNTED.equals(intent.getAction())){
                if(CURR_LOG_TYPE == SDCARD_TYPE){
                    Log.d(TAG, "SDCard 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, "SDCard is MOUNTED");
                    CURR_LOG_TYPE = SDCARD_TYPE;
                    new LogCollectorThread().start();
                }
            }
        }
    }

    /**
     * 日志任务接收广播
     * 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();
            //切换日志文件action
            if(SWITCH_LOG_FILE_ACTION.equals(action)){
                new LogCollectorThread().start();
            }else if(MONITOR_LOG_SIZE_ACTION.equals(action)){
                //日志文件监测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;
            }
        }
    }

}
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