Android的log保存到文件上查看

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package com.cccc.service;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SDcard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 *  *  *         最后不要忘记在配置文件中加入 *         Xml代码 *         <uses-permission android:name="android.permission.READ_LOGS" /> *  */public class LogService extends Service{private static final StringTAG= "LogService";private static final intMEMORY_LOG_FILE_MAX_SIZE= 10 * 1024 * 1024;// 内存中日志文件最大值，10Mprivate static final intMEMORY_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 intSDCARD_LOG_FILE_SAVE_DAYS= 7;// sd卡中日志文件的最多保存天数private StringLOG_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 StringLOG_PATH_SDCARD_DIR;// 日志文件在sdcard中的路径@SuppressWarnings("unused")private StringLOG_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 intSDCARD_TYPE= 0;// 当前的日志记录类型为存储在SD卡下面private final intMEMORY_TYPE= 1;// 当前的日志记录类型为存储在内存中private intCURR_LOG_TYPE= SDCARD_TYPE;// 当前的日志记录类型private StringCURR_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 StringlogServiceLogName= "Log.log";// 本服务输出的日志文件名称private SimpleDateFormatmyLogSdf= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");private OutputStreamWriterwriter;private SimpleDateFormatsdf= new SimpleDateFormat("yyyy-MM-dd HHmmss");// 日志名称格式private Processprocess;private WakeLockwakeLock;private SDStateMonitorReceiversdStateReceiver;// SDcard状态监测private LogTaskReceiverlogTaskReceiver;/* * 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 booleanlogSizeMoniting= false;private static StringMONITOR_LOG_SIZE_ACTION= "MONITOR_LOG_SIZE";// 日志文件监测actionprivate static StringSWITCH_LOG_FILE_ACTION= "SWITCH_LOG_FILE_ACTION";// 切换日志文件action@Overridepublic IBinder onBind(Intent intent){return null;}@Overridepublic 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");}@Overridepublic 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 /initList<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 Stringuser;public Stringpid;public Stringppid;public Stringname;@Overridepublic String toString(){String str = "user=" + user + " pid=" + pid + " ppid=" + ppid + " name=" + name;return str;}}class StreamConsumer extends Thread{InputStreamis;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;}}}@Overridepublic 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);}}

最后在配置文件AndroidManifest.xml中加入权限
Xml代码  
<uses-permission android:name="android.permission.READ_LOGS" />