2019独角兽企业重金招聘Python工程师标准>>> 
转自：http://blog.csdn.net/jzh2012/article/details/7462506
感谢分享！
案例：当我们的软件安装在手机上的时候，或许还需要知道整个软件运行的情况，那么我们就需要一种把软件运行的状况记录下来，保存在某个地方(本地文件，以下就是解决方法
直接上代码：
package com.ifeng.fhdt.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 orgProcessList = getAllProcess();
List 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 commandList = new ArrayList();
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 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 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 getProcessInfoList(List orgProcessList) {
List procInfoList = 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 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);
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 getAllProcess() {
List orgProcList = new ArrayList();
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 commandList = new ArrayList();
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("*:w");
//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{
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);
}
}
此外还要加上权限：