android 将log保存到文本

1 先加上此类 java view plaincopy package com leader hsj utils import java io BufferedReader import java io File import java io FileNotFoundException import java io FileOutputStream import java io IOException import java io InputStreamReader import java text SimpleDateFormat import java util Date import android content Context import android os Environment log 日志统计保存 author 陈伟斌 public class LogcatHelper private static LogcatHelper INSTANCE null private static String PATH LOGCAT private LogDumper mLogDumper null private int mPId private final static String LOG FILE DIR leaderlog 初始化目录 public void init Context context if Environment getExternalStorageState equals Environment MEDIA MOUNTED 优先保存到 SD 卡中 PATH LOGCAT Environment getExternalStorageDirectory getAbsolutePath File separator LOG FILE DIR else 如果 SD 卡不存在 就保存到本应用的目录下 PATH LOGCAT context getFilesDir getAbsolutePath File separator LOG FILE DIR File file new File PATH LOGCAT if file exists file mkdirs public static LogcatHelper getInstance Context context if INSTANCE null INSTANCE new LogcatHelper context return INSTANCE private LogcatHelper Context context init context mPId android os Process myPid public void start if mLogDumper null mLogDumper new LogDumper String valueOf mPId PATH LOGCAT mLogDumper start public void stop if mLogDumper null mLogDumper stopLogs mLogDumper null private class LogDumper extends Thread private Process logcatProc private BufferedReader mReader null private boolean mRunning true String cmds null private String mPID private FileOutputStream out null public LogDumper String pid String dir mPID pid try out new FileOutputStream new File dir leader getFileName log catch FileNotFoundException e TODO Auto generated catch block e printStackTrace 日志等级 v d w e f s 显示当前 mPID 程序的 E 和 W 等级的日志 cmds logcat e w grep mPID cmds logcat grep mPID 打印所有日志信息 cmds logcat s way 打印标签过滤信息 cmds logcat e i grep mPID public void stopLogs mRunning false Override public void run try logcatProc Runtime getRuntime exec cmds mReader new BufferedReader new InputStreamReader logcatProc getInputStream 1024 String line null while mRunning if line length 0 continue if out null catch IOException e e printStackTrace finally if logcatProc null logcatProc destroy logcatProc null if mReader null try mReader close mReader null catch IOException e e printStackTrace if out null try out close catch IOException e e printStackTrace out null public static String getFileName SimpleDateFormat format new SimpleDateFormat yyyy MM dd String date format format new Date System currentTimeMillis return date 2012年10月03日 23 41 31 public static String getDateEN SimpleDateFormat format1 new SimpleDateFormat yyyy MM dd HH mm ss String date1 format1 format new Date System currentTimeMillis return date1 2012 10 03 23 41 31 2 加上权限 html view plaincopy 3 调用 java view plaincopy LogcatH