鸿蒙-实践课程四 android、HarmonyOS 日志处理

首先回顾下android

android.util 种Log包：v i e w println  getStackTraceString以及定义等级方式：public static final int ASSERT = 7;public static final int DEBUG = 3;public static final int ERROR = 6;public static final int INFO = 4;public static final int VERBOSE = 2;public static final int WARN = 5;

再封装时候需要处理整个app 输出log的等级判定，包括shell日志输出，上传功能

HiLog 是harmonyos 的主要log 输出类，定义等级如下：public static final int DEBUG = 3;public static final int ERROR = 6;public static final int FATAL = 7;public static final int INFO = 4;public static final int LOG_APP = 0;public static final int WARN = 5;

 LOG_APP是目前sdk api实现唯一一个接口，后续会进行扩展。

另外，本人再devEco studio ide种寻找Hilog的file expore 文件管理器，目前未找到，不知道为何要去除该内容，本人思考可能由于harmonyos最终的文件形式module形式安装hab或者apk格式，存在多个文件日志流问题，涉及安全。

所以本人尝试了，Hilog一些类似android 封装，发现基本都可以用，代码类放着末尾，只是简单进行封装。

对比下2个端文件路径差别，有些路径是本人加入，可以看前段实践：

LogUtil.d(TAG, "getCacheDir=" + context.getCacheDir().getPath());LogUtil.d(TAG, "getCodeCacheDir=" + context.getCodeCacheDir().getPath());LogUtil.d(TAG, "getDatabaseDir=" + context.getDatabaseDir().getPath());LogUtil.d(TAG, "getDataDir=" + context.getDataDir().getPath());LogUtil.d(TAG, "getExternalCacheDir=" + context.getExternalCacheDir().getPath());LogUtil.d(TAG, "getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS)=" + context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS).getPath());LogUtil.d(TAG, "getDistributedDir=" + getDistributedDir().getPath());LogUtil.d(TAG, "getFilesDir=" + getFilesDir().getPath());LogUtil.d(TAG, "getNoBackupFilesDir=" + getNoBackupFilesDir().getPath());LogUtil.d(TAG, "getPreferencesDir=" + getPreferencesDir().getPath());

07-20 16:17:29.676 27894-27894/? I System.out: ThreadAbilitySlice getCacheDir=/data/user/0/com.xmf.harmonydemo/cache07-20 16:17:29.676 27894-27894/? I System.out: ThreadAbilitySlice getCodeCacheDir=/data/user/0/com.xmf.harmonydemo/code_cache07-20 16:17:29.677 27894-27894/? I System.out: ThreadAbilitySlice getDatabaseDir=/data/data/com.xmf.harmonydemo/ThreadAbility/databases07-20 16:17:29.677 27894-27894/? I System.out: ThreadAbilitySlice getDataDir=/data/user/0/com.xmf.harmonydemo07-20 16:17:29.683 27894-27894/? I System.out: ThreadAbilitySlice getExternalCacheDir=/storage/emulated/0/Android/data/com.xmf.harmonydemo/cache07-20 16:17:29.685 27894-27894/? I System.out: ThreadAbilitySlice getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS)=/storage/emulated/0/Android/data/com.xmf.harmonydemo/files/Download07-20 16:17:29.690 27894-27894/? I System.out: ThreadAbilitySlice getDistributedDir=/mnt/mdfs/699956351188076798/merge_view/data/com.xmf.harmonydemo/ThreadAbility07-20 16:17:29.690 27894-27894/? I System.out: ThreadAbilitySlice getFilesDir=/data/user/0/com.xmf.harmonydemo/files07-20 16:17:29.690 27894-27894/? I System.out: ThreadAbilitySlice getNoBackupFilesDir=/data/user/0/com.xmf.harmonydemo/no_backup07-20 16:17:29.690 27894-27894/? I System.out: ThreadAbilitySlice getPreferencesDir=/data/data/com.xmf.harmonydemo/ThreadAbility/preferences

整体生成代码如下：

package com.example.harmonyfragment.tools;import com.example.harmonyfragment.BuildConfig;import ohos.hiviewdfx.HiLog;import ohos.hiviewdfx.HiLogLabel;import java.io.*;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Locale;/** * 用于harmonyos 日志的处理，支持:写入文件，上传记录文件 */public class LogUtil {    /**     * 文件路径     */    private String mFilePath;    /**     * 线程运行标志     */    private boolean isRunning = true;    /**     * 调用这个类的线程     */    private int mPid;    //可以通过TAG 或 DOMAIN 筛选    private static final int DOMAIN = 0x00001;    public  static final String TAG = "RUIJIE_TAG";    private static final HiLogLabel LABEL = new HiLogLabel(getLogLeve(), DOMAIN, TAG);    //判断是否为线上包    public static int logLeve = HiLog.LOG_APP;    /**     * 写日志对象     */    private LogWriter logWriter;    /**     * 写入本地日志线程,只包含     */    private class LogWriter extends Thread { /**  * 文件路径  */ private String mFilePath; /**  * 调用这个类的线程  */ private int mPid; /**  * 线程运行标志  */ private boolean isRunning = true; public  String saveFlag ; /**  * @param filePath 文件路径  * @param pid  */ public LogWriter(String filePath, int pid, String packageName) {     this.mPid = pid;     this.saveFlag = packageName;     this.mFilePath = filePath; } @Override public void run() {     SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS", Locale.CHINA);//日期格式化对象     Process process = null;//进程     BufferedReader reader = null;     FileWriter writer = null;     try {  //执行命令行  String cmd = "logcat *:e *:w | grep";  process = Runtime.getRuntime().exec(cmd);  //得到输入流  reader = new BufferedReader(new InputStreamReader(process.getInputStream()), 1024);  //创建文件  File file = new File(mFilePath);  if (!file.exists()) {      file.getParentFile().mkdirs();      file.createNewFile();  }  writer = new FileWriter(file, true);  //循环写入文件  String line = null;  while (isRunning) {      line = reader.readLine();      if (line != null && line.length() > 0 ) {   writer.append(String.format("PID:%s %s%s%s%s",this.mPid,"\t",sdf.format(new Date(System.currentTimeMillis())),"\t",line));   writer.flush();      } else {   break;      }  }     } catch (Exception e) {  e.printStackTrace();     } finally {  if (process != null) {      process.destroy();  }  if (reader != null) {      try {   reader.close();      } catch (IOException e) {   e.printStackTrace();      }  }  if (writer != null) {      try {   writer.flush();   writer.close();      } catch (IOException e) {   e.printStackTrace();      }  }  process = null;  reader = null;  writer = null;     } } public void end() {     isRunning = false; }    }    /**     * 整个应用只需要调用一次即可:开始本地记录     *     * @param filePath 要写入的目的文件路径     * @param iswrite    是否需要写入sdk     */    public void startWriteLogToSdcard(String filePath,boolean iswrite,String packageName) { if (iswrite) {     if (logWriter == null) {  try {      /** LogUtil这个类的pid,必须在类外面得到 */      logWriter = new LogWriter(filePath, ohos.os.ProcessManager.getPid(),packageName);  } catch (Exception e) {      e.printStackTrace();  }     }     logWriter.run(); }    }    /**     * 日志上传线程     */    private class LogUploader extends Thread { /**  * 当前线程是否正在运行  */ private boolean isRunning = true; /**  * 上传所需要的url  */ private String mStrUrl; /**  * 上传所需要的其他参数  */ private HashMap mAllParams; /**  * 上传所需要pid  */ private int mPid; /**  * 构造方法  *  * @param strUrl    上传所需要的url  * @param allParams 需要上传的额外的参数【除了日志以外】  * @param pid日志所在的pid  */ public LogUploader(String strUrl, HashMap allParams, int pid) {     this.mStrUrl = strUrl;     this.mAllParams = allParams;     this.mPid = pid; } @Override public void run() {     SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS", Locale.CHINA);//日期格式化对象     Process process = null;//进程     BufferedReader reader = null;     try {  //执行命令行,得到输入流  String cmd = "logcat *:e *:w | grep";  process = Runtime.getRuntime().exec(cmd);  reader = new BufferedReader(new InputStreamReader(process.getInputStream()), 1024);  String line = null;  while (isRunning) {      line = reader.readLine();      if (line != null && line.length() > 0) {   String log = String.format("PID:%s %s%s%s%s",this.mPid,"\t",sdf.format(new Date(System.currentTimeMillis())),"\t",line);   mAllParams.put("log", log);      } else {   break;      }  }     } catch (Exception e) {  e.printStackTrace();     } finally {  if (process != null) {      process.destroy();  }  if (reader != null) {      try {   reader.close();      } catch (IOException e) {   e.printStackTrace();      }  }  process = null;  reader = null;     } } public void end() {     isRunning = false; }    }    /* ========================下面的是需要上传的数据========================== */    private LogUploader logUploader;    /**     * 整个应用调用一次即可：上传日志数据     *     * @param strUrl    上传所需要的url     * @param allParams 需要上传的额外的参数【除了日志以外】     * @param isUploadLog    是否需要上传     */    public void startUploadLog(String strUrl, HashMap     allParams,boolean isUploadLog) { if (isUploadLog) {     if (logUploader == null) {  logUploader = new LogUploader(strUrl, allParams, ohos.os.ProcessManager.getPid());     }     logUploader.start(); }    }    /**     * 整个应用调用一次即可：结束上传日志数据     */    public void endUploadLog() { if (logUploader != null) {     logUploader.end(); }    }    /**     * 整个应用只需要调用一次即可:结束本地记录     */    public void endWriteLogToSdcard() { if (logWriter != null) {     logWriter.end(); }    }    public static void setLogLeve(int logLeve) { LogUtil.logLeve = logLeve;    }    public static int getLogLeve() { if(BuildConfig.DEBUG){     return HiLog.LOG_APP; } return logLeve;    }    public static void error(String msg) { HiLog.error(LABEL, String.format("%s",msg));    }    public static void debug(String msg) { HiLog.debug(LABEL, String.format("%s",msg));    }    public static void warn(String msg) { HiLog.warn(LABEL, String.format("%s",msg));    }    public static void info(String msg) { HiLog.info(LABEL, String.format("%s",msg));    }    public static void fatal(String msg) { HiLog.fatal(LABEL, String.format("%s",msg));    }    public static void info(String tag,String format,Object... objects){ HiLogLabel logLabel = new HiLogLabel(getLogLeve(),DOMAIN,tag); HiLog.info(logLabel,format,objects);    }    public static void debug(String tag,String format,Object... objects){ HiLogLabel logLabel = new HiLogLabel(getLogLeve(),DOMAIN,tag); HiLog.debug(logLabel,format,objects);    }    public static void error(String tag, String format, Object... objects){ HiLogLabel logLabel = new HiLogLabel(getLogLeve(),DOMAIN,tag); HiLog.error(logLabel,format,objects);    }    public static void warn(String tag,String format,Object... objects){ HiLogLabel logLabel = new HiLogLabel(getLogLeve(),DOMAIN,tag); HiLog.warn(logLabel,format,objects);    }    public static void fatal(String tag,String format,Object... objects){ HiLogLabel logLabel = new HiLogLabel(getLogLeve(),DOMAIN,tag); HiLog.fatal(logLabel,format,objects);    }}