android 将log保存到文本.doc

1.先加上此类

[java] view plaincopy

1 package com.leader.hsj.utils;
2
3 import java.io.BufferedReader;
4 import java.io.File;
5 import java.io.FileNotFoundException;
6 import java.io.FileOutputStream;
7 import java.io.IOException;
8 import java.io.InputStreamReader;
9 import java.text.SimpleDateFormat;
10 import java.util.Date;
11
12 import android.content.Context;
13 import android.os.Environment;
14
15 /**
16 * log日志统计保存
17 *
18 * @author 陈伟斌
19 *
20 */
21
22 public class LogcatHelper {
23
24 private static LogcatHelper INSTANCE = null;
25 private static String PATH_LOGCAT;
26 private LogDumper mLogDumper = null;
27 private int mPId;
28 private final static String LOG_FILE_DIR="leaderlog";
29 /**
30 *
31 * 初始化目录
32 *
33 * */
34 public void init(Context context) {
35 if (Environment.getExternalStorageState().equals(
36 Environment.MEDIA_MOUNTED)) {// 优先保存到SD卡中
37 PATH_LOGCAT = Environment.getExternalStorageDirectory()
38 .getAbsolutePath() + File.separator + LOG_FILE_DIR;
39 } else {// 如果SD卡不存在，就保存到本应用的目录下
40 PATH_LOGCAT = context.getFilesDir().getAbsolutePath()
41 + File.separator + LOG_FILE_DIR;
42 }
43 File file = new File(PATH_LOGCAT);
44 if (!file.exists()) {
45 file.mkdirs();
46 }
47 }
48
49 public static LogcatHelper getInstance(Context context) {
50 if (INSTANCE == null) {
51 INSTANCE = new LogcatHelper(context);
52 }
53 return INSTANCE;
54 }
55
56 private LogcatHelper(Context context) {
57 init(context);
58 mPId = android.os.Process.myPid();
59 }
60
61 public void start() {
62 if (mLogDumper == null)
63 mLogDumper = new LogDumper(String.valueOf(mPId), PATH_LOGCAT);
64 mLogDumper.start();
65 }
66
67 public void stop() {
68 if (mLogDumper != null) {
69 mLogDumper.stopLogs();
70 mLogDumper = null;
71 }
72 }
73
74 private class LogDumper extends Thread {
75
76 private Process logcatProc;
77 private BufferedReader mReader = null;
78 private boolean mRunning = true;
79 String cmds = null;
80 private String mPID;
81 private FileOutputStream out = null;
82
83 public LogDumper(String pid, String dir) {
84 mPID = pid;
85 try {
86 out = new FileOutputStream(new File(dir, "leader-"
87 + getFileName() + ".log"));
88 } catch (FileNotFoundException e) {
89 // TODO Auto-generated catch block
90 e.printStackTrace();
91 }
92
93 /**
94 *
95 * 日志等级：*:v , *:d , *:w , *:e , *:f , *:s
96 *
97 * 显示当前mPID程序的 E和W等级的日志.
98 *
99 * */
100
101 // cmds = "logcat *:e *:w | grep \"(" + mPID + ")\"";
102 // cmds = "logcat | grep \"(" + mPID + ")\"";//打印所有日志信息
103 // cmds = "logcat -s way";//打印标签过滤信息
104 cmds = "logcat *:e *:i | grep \"(" + mPID + ")\"";
105
106 }
107
108 public void stopLogs() {
109 mRunning = false;
110 }
111
112 @Override
113 public void run() {
114 try {
115 logcatProc = Runtime.getRuntime().exec(cmds);
116 mReader = new BufferedReader(new InputStreamReader(
117 logcatProc.getInputStream()), 1024);
118 String line = null;
119 while (mRunning && (line = mReader.readLine()) != null) {
120 if (!mRunning) {
121 break;
122 }
123 if (line.length() == 0) {
124 continue;
125 }
126 if (out != null && line.contains(mPID)) {
127 out.write((getDateEN() + " " + line + "\n")
128 .getBytes());
129 }
130 }
131
132 } catch (IOException e) {
133 e.printStackTrace();
134 } finally {
135 if (logcatProc != null) {
136 logcatProc.destroy();
137 logcatProc = null;
138 }
139 if (mReader != null) {
140 try {
141 mReader.close();
142 mReader = null;
143 } catch (IOException e) {
144 e.printStackTrace();
145 }
146 }
147 if (out != null) {
148 try {
149 out.close();
150 } catch (IOException e) {
151 e.printStackTrace();
152 }
153 out = null;
154 }
155
156 }
157
158 }
159
160 }
161
162 public static String getFileName() {
163 SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
164 String date = format.format(new Date(System.currentTimeMillis()));
165 return date;// 2012年10月03日 23:41:31
166 }
167
168 public static String getDateEN() {
169 SimpleDateFormat format1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
170 String date1 = format1.format(new Date(System.currentTimeMillis()));
171 return date1;// 2012-10-03 23:41:31
172 }
173
174 }

2.加上权限

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175 <uses-permission android:name="android.permission.READ_LOGS" />
176 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

3.调用
[java] view plaincopy

177 LogcatHelper.getInstance(this).start(); // 将log保存到文件，便于调试，实际发布时请注释掉

使用 adb logcat -d > logcat.txt 这个命令也行
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