如何获取 android 的系统日志 logcat
公司要调试产品，想要监视试用品的 logcat ,捕获本机产生的日志，发送到服务器上
（提供一个完整的代码下载 http://download.csdn.net/detail/matao_ct/3768161 这里会比下面的代码更完善，多了网络传输和格式转换 需要2分哦..不嫌麻烦的话在下面拷贝也行.... ）
折腾了一天，基本上做好
现在来看代码
读取日志需要的权限
<uses-permission android:name="android.permission.READ_LOGS"/>
主要代码
package mt.fzgh;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
public class MyLog
{
public static class MLog //静态类
{
public static void getLog()
{
System.out.println("--------func start--------"); // 方法启动
try
{
ArrayList<String> cmdLine=new ArrayList<String>(); //设置命令 logcat -d 读取日志
cmdLine.add("logcat");
cmdLine.add("-d");
ArrayList<String> clearLog=new ArrayList<String>(); //设置命令 logcat -c 清除日志
clearLog.add("logcat");
clearLog.add("-c");
Process process=Runtime.getRuntime().exec(cmdLine.toArray(new String[cmdLine.size()])); //捕获日志
BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(process.getInputStream())); //将捕获内容转换为BufferedReader
// Runtime.runFinalizersOnExit(true);
String str=null;
while((str=bufferedReader.readLine())!=null) //开始读取日志，每次读取一行
{
Runtime.getRuntime().exec(clearLog.toArray(new String[clearLog.size()])); //清理日志....这里至关重要，不清理的话，任何操作都将产生新的日志，代码进入死循环，直到bufferreader满
System.out.println(str); //输出，在logcat中查看效果，也可以是其他操作，比如发送给服务器..
}
if(str==null)
{
System.out.println("-- is null --");
}
}
catch(Exception e)
{
e.printStackTrace();
}
System.out.println("--------func end--------");
}
}
}
这里比较令人纠结的一点就是日志的清理 logcat -c 如果不加入 清理 在buffer满为止，代码自身能够迭代6~7次....
接下来看看结果 日志比较长....一般都这样..原日志用蓝色，捕获并输出对比部分为红色
11-07 06:32:35.895: DEBUG/AndroidRuntime(1071): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<<
11-07 06:32:35.905: DEBUG/AndroidRuntime(1071): CheckJNI is ON
11-07 06:32:36.106: DEBUG/AndroidRuntime(1071): --- registering native functions ---
11-07 06:32:36.436: DEBUG/ddm-heap(1071): Got feature list request
11-07 06:32:36.817: DEBUG/PackageParser(52): Scanning package: /data/app/vmdl53483.tmp
11-07 06:32:36.915: INFO/PackageManager(52): Removing non-system package:mt.fzgh
11-07 06:32:36.915: DEBUG/PackageManager(52): Removing package mt.fzgh
11-07 06:32:36.926: DEBUG/PackageManager(52): Activities: mt.fzgh.LogDemoActivity
11-07 06:32:37.025: DEBUG/PackageManager(52): Scanning package mt.fzgh
11-07 06:32:37.037: INFO/PackageManager(52): /data/app/vmdl53483.tmp changed; unpacking
11-07 06:32:37.056: DEBUG/installd(32): DexInv: --- BEGIN '/data/app/vmdl53483.tmp' ---
11-07 06:32:37.257: DEBUG/dalvikvm(1077): DexOpt: load 32ms, verify 70ms, opt 1ms
11-07 06:32:37.275: DEBUG/installd(32): DexInv: --- END '/data/app/vmdl53483.tmp' (success) ---
11-07 06:32:37.275: DEBUG/PackageManager(52): Activities: mt.fzgh.LogDemoActivity
11-07 06:32:37.296: DEBUG/ActivityManager(52): Uninstalling process mt.fzgh
11-07 06:32:37.296: DEBUG/ActivityManager(52): Force removing process ProcessRecord{44ed5a28 929:mt.fzgh/10029} (mt.fzgh/10029)
11-07 06:32:37.296: INFO/Process(52): Sending signal. PID: 929 SIG: 9
11-07 06:32:37.336: DEBUG/ActivityManager(52): Received spurious death notification for thread android.os.BinderProxy@44ce7588
11-07 06:32:37.415: INFO/installd(32): move /data/dalvik-cache/data@app@vmdl53483.tmp@classes.dex -> /data/dalvik-cache/data@app@mt.fzgh.apk@classes.dex
11-07 06:32:37.426: DEBUG/PackageManager(52): New package installed in /data/app/mt.fzgh.apk
11-07 06:32:37.525: DEBUG/AndroidRuntime(1071): Shutting down VM
11-07 06:32:37.525: DEBUG/dalvikvm(1071): DestroyJavaVM waiting for non-daemon threads to exit
11-07 06:32:37.535: DEBUG/dalvikvm(1071): DestroyJavaVM shutting VM down
11-07 06:32:37.535: DEBUG/dalvikvm(1071): HeapWorker thread shutting down
11-07 06:32:37.535: DEBUG/dalvikvm(1071): HeapWorker thread has shut down
11-07 06:32:37.535: DEBUG/jdwp(1071): JDWP shutting down net...
11-07 06:32:37.535: INFO/dalvikvm(1071): Debugger has detached; object registry had 1 entries
11-07 06:32:37.535: DEBUG/dalvikvm(1071): VM cleaning up
11-07 06:32:37.546: DEBUG/dalvikvm(1071): LinearAlloc 0x0 used 623916 of 5242880 (11%)
11-07 06:32:37.575: DEBUG/ActivityManager(52): Uninstalling process mt.fzgh
11-07 06:32:37.575: ERROR/AndroidRuntime(1071): ERROR: thread attach failed
11-07 06:32:38.047: DEBUG/dalvikvm(52): GC freed 13838 objects / 811832 bytes in 263ms
11-07 06:32:38.056: WARN/ResourceType(52): Resources don't contain package for resource number 0x7f0700e5
11-07 06:32:38.086: WARN/ResourceType(52): Resources don't contain package for resource number 0x7f020031
11-07 06:32:38.086: WARN/ResourceType(52): Resources don't contain package for resource number 0x7f020030
11-07 06:32:38.086: WARN/ResourceType(52): Resources don't contain package for resource number 0x7f050000
11-07 06:32:38.195: WARN/ResourceType(52): Resources don't contain package for resource number 0x7f060000
11-07 06:32:38.195: WARN/ResourceType(52): Resources don't contain package for resource number 0x7f060001
11-07 06:32:38.395: DEBUG/dalvikvm(106): GC freed 217 objects / 9344 bytes in 319ms
11-07 06:32:38.466: WARN/ResourceType(52): Resources don't contain package for resource number 0x7f0700e5
11-07 06:32:38.466: WARN/ResourceType(52): Resources don't contain package for resource number 0x7f020031
11-07 06:32:38.466: WARN/ResourceType(52): Resources don't contain package for resource number 0x7f020030
11-07 06:32:38.466: WARN/ResourceType(52): Resources don't contain package for resource number 0x7f050000
11-07 06:32:38.475: WARN/ResourceType(52): Resources don't contain package for resource number 0x7f060000
11-07 06:32:38.475: WARN/ResourceType(52): Resources don't contain package for resource number 0x7f060001
11-07 06:32:38.766: DEBUG/AndroidRuntime(1082): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<< 此处和上面有重复，不过是日志本身重复，上面失败了
11-07 06:32:38.775: DEBUG/AndroidRuntime(1082): CheckJNI is ON
11-07 06:32:39.195: DEBUG/AndroidRuntime(1082): --- registering native functions ---
11-07 06:32:39.535: DEBUG/ddm-heap(1082): Got feature list request
11-07 06:32:39.895: INFO/ActivityManager(52): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=mt.fzgh/.LogDemoActivity }
11-07 06:32:39.985: INFO/ActivityManager(52): Start proc mt.fzgh for activity mt.fzgh/.LogDemoActivity: pid=1088 uid=10029 gids={1007}
11-07 06:32:39.995: DEBUG/AndroidRuntime(1082): Shutting down VM
11-07 06:32:39.995: DEBUG/dalvikvm(1082): DestroyJavaVM waiting for non-daemon threads to exit
11-07 06:32:39.995: DEBUG/dalvikvm(1082): DestroyJavaVM shutting VM down
11-07 06:32:39.995: DEBUG/dalvikvm(1082): HeapWorker thread shutting down
11-07 06:32:39.995: DEBUG/dalvikvm(1082): HeapWorker thread has shut down
11-07 06:32:39.995: DEBUG/jdwp(1082): JDWP shutting down net...
11-07 06:32:39.995: INFO/dalvikvm(1082): Debugger has detached; object registry had 1 entries
11-07 06:32:40.018: DEBUG/dalvikvm(1082): VM cleaning up
11-07 06:32:40.036: DEBUG/dalvikvm(1082): LinearAlloc 0x0 used 639500 of 5242880 (12%)
11-07 06:32:40.065: ERROR/AndroidRuntime(1082): ERROR: thread attach failed
11-07 06:32:40.767: DEBUG/ddm-heap(1088): Got feature list request
11-07 06:32:40.815: INFO/mt(1088): success
11-07 06:32:40.815: INFO/System.out(1088): --------func start-------- 注意这里 此处之下，就是我们捕获到的内容
11-07 06:32:41.086: INFO/System.out(1088): D/AndroidRuntime( 1071): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<<
11-07 06:32:41.125: INFO/System.out(1088): D/AndroidRuntime( 1071): CheckJNI is ON
11-07 06:32:41.166: INFO/System.out(1088): D/AndroidRuntime( 1071): --- registering native functions ---
11-07 06:32:41.206: INFO/System.out(1088): D/ddm-heap( 1071): Got feature list request
11-07 06:32:41.246: INFO/System.out(1088): D/PackageParser( 52): Scanning package: /data/app/vmdl53483.tmp
11-07 06:32:41.305: INFO/System.out(1088): I/PackageManager( 52): Removing non-system package:mt.fzgh
11-07 06:32:41.346: INFO/System.out(1088): D/PackageManager( 52): Removing package mt.fzgh
11-07 06:32:41.386: INFO/System.out(1088): D/PackageManager( 52): Activities: mt.fzgh.LogDemoActivity
11-07 06:32:41.416: INFO/System.out(1088): D/PackageManager( 52): Scanning package mt.fzgh
11-07 06:32:41.456: INFO/System.out(1088): I/PackageManager( 52): /data/app/vmdl53483.tmp changed; unpacking
11-07 06:32:41.506: INFO/System.out(1088): D/installd( 32): DexInv: --- BEGIN '/data/app/vmdl53483.tmp' ---
11-07 06:32:41.546: INFO/System.out(1088): D/dalvikvm( 1077): DexOpt: load 32ms, verify 70ms, opt 1ms
11-07 06:32:41.586: INFO/System.out(1088): D/installd( 32): DexInv: --- END '/data/app/vmdl53483.tmp' (success) ---
11-07 06:32:41.626: INFO/System.out(1088): D/PackageManager( 52): Activities: mt.fzgh.LogDemoActivity
11-07 06:32:41.666: INFO/System.out(1088): D/ActivityManager( 52): Uninstalling process mt.fzgh
11-07 06:32:41.716: INFO/System.out(1088): D/ActivityManager( 52): Force removing process ProcessRecord{44ed5a28 929:mt.fzgh/10029} (mt.fzgh/10029)
11-07 06:32:41.756: INFO/System.out(1088): I/Process ( 52): Sending signal. PID: 929 SIG: 9
11-07 06:32:41.805: INFO/System.out(1088): D/ActivityManager( 52): Received spurious death notification for thread android.os.BinderProxy@44ce7588
11-07 06:32:41.845: INFO/System.out(1088): I/installd( 32): move /data/dalvik-cache/data@app@vmdl53483.tmp@classes.dex -> /data/dalvik-cache/data@app@mt.fzgh.apk@classes.dex
11-07 06:32:41.887: INFO/System.out(1088): D/PackageManager( 52): New package installed in /data/app/mt.fzgh.apk
11-07 06:32:41.926: INFO/System.out(1088): D/AndroidRuntime( 1071): Shutting down VM
11-07 06:32:41.966: INFO/System.out(1088): D/dalvikvm( 1071): DestroyJavaVM waiting for non-daemon threads to exit
11-07 06:32:42.016: INFO/System.out(1088): D/dalvikvm( 1071): DestroyJavaVM shutting VM down
11-07 06:32:42.056: INFO/System.out(1088): D/dalvikvm( 1071): HeapWorker thread shutting down
11-07 06:32:42.095: INFO/System.out(1088): D/dalvikvm( 1071): HeapWorker thread has shut down
11-07 06:32:42.136: INFO/System.out(1088): D/jdwp ( 1071): JDWP shutting down net...
11-07 06:32:42.176: INFO/System.out(1088): I/dalvikvm( 1071): Debugger has detached; object registry had 1 entries
11-07 06:32:42.216: INFO/System.out(1088): D/dalvikvm( 1071): VM cleaning up
11-07 06:32:42.256: INFO/System.out(1088): D/dalvikvm( 1071): LinearAlloc 0x0 used 623916 of 5242880 (11%)
11-07 06:32:42.296: INFO/System.out(1088): D/ActivityManager( 52): Uninstalling process mt.fzgh
11-07 06:32:42.336: INFO/System.out(1088): E/AndroidRuntime( 1071): ERROR: thread attach failed
11-07 06:32:42.376: INFO/System.out(1088): D/dalvikvm( 52): GC freed 13838 objects / 811832 bytes in 263ms
11-07 06:32:42.416: INFO/System.out(1088): W/ResourceType( 52): Resources don't contain package for resource number 0x7f0700e5
11-07 06:32:42.458: INFO/System.out(1088): W/ResourceType( 52): Resources don't contain package for resource number 0x7f020031
11-07 06:32:42.496: INFO/System.out(1088): W/ResourceType( 52): Resources don't contain package for resource number 0x7f020030
11-07 06:32:42.536: INFO/System.out(1088): W/ResourceType( 52): Resources don't contain package for resource number 0x7f050000
11-07 06:32:42.575: INFO/System.out(1088): W/ResourceType( 52): Resources don't contain package for resource number 0x7f060000
11-07 06:32:42.626: INFO/System.out(1088): W/ResourceType( 52): Resources don't contain package for resource number 0x7f060001
11-07 06:32:42.667: INFO/System.out(1088): D/dalvikvm( 106): GC freed 217 objects / 9344 bytes in 319ms
11-07 06:32:42.706: INFO/System.out(1088): W/ResourceType( 52): Resources don't contain package for resource number 0x7f0700e5
11-07 06:32:42.746: INFO/System.out(1088): W/ResourceType( 52): Resources don't contain package for resource number 0x7f020031
11-07 06:32:42.786: INFO/System.out(1088): W/ResourceType( 52): Resources don't contain package for resource number 0x7f020030
11-07 06:32:42.825: INFO/System.out(1088): W/ResourceType( 52): Resources don't contain package for resource number 0x7f050000
11-07 06:32:42.865: INFO/System.out(1088): W/ResourceType( 52): Resources don't contain package for resource number 0x7f060000
11-07 06:32:42.905: INFO/System.out(1088): W/ResourceType( 52): Resources don't contain package for resource number 0x7f060001
11-07 06:32:42.946: INFO/System.out(1088): D/AndroidRuntime( 1082):
11-07 06:32:42.985: INFO/System.out(1088): D/AndroidRuntime( 1082): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<<
11-07 06:32:43.036: INFO/System.out(1088): D/AndroidRuntime( 1082): CheckJNI is ON
11-07 06:32:43.095: INFO/System.out(1088): D/AndroidRuntime( 1082): --- registering native functions ---
11-07 06:32:43.139: INFO/System.out(1088): D/ddm-heap( 1082): Got feature list request
11-07 06:32:43.176: INFO/System.out(1088): I/ActivityManager( 52): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=mt.fzgh/.LogDemoActivity }
11-07 06:32:43.216: INFO/System.out(1088): I/ActivityManager( 52): Start proc mt.fzgh for activity mt.fzgh/.LogDemoActivity: pid=1088 uid=10029 gids={1007}
11-07 06:32:43.256: INFO/System.out(1088): D/AndroidRuntime( 1082): Shutting down VM
11-07 06:32:43.297: INFO/System.out(1088): D/dalvikvm( 1082): DestroyJavaVM waiting for non-daemon threads to exit
11-07 06:32:43.336: INFO/System.out(1088): D/dalvikvm( 1082): DestroyJavaVM shutting VM down
11-07 06:32:43.385: INFO/System.out(1088): D/dalvikvm( 1082): HeapWorker thread shutting down
11-07 06:32:43.426: INFO/System.out(1088): D/dalvikvm( 1082): HeapWorker thread has shut down
11-07 06:32:43.475: INFO/System.out(1088): D/jdwp ( 1082): JDWP shutting down net...
11-07 06:32:43.508: INFO/System.out(1088): I/dalvikvm( 1082): Debugger has detached; object registry had 1 entries
11-07 06:32:43.546: INFO/System.out(1088): D/dalvikvm( 1082): VM cleaning up
11-07 06:32:43.586: INFO/System.out(1088): D/dalvikvm( 1082): LinearAlloc 0x0 used 639500 of 5242880 (12%)
11-07 06:32:43.635: INFO/System.out(1088): E/AndroidRuntime( 1082): ERROR: thread attach failed
11-07 06:32:43.685: INFO/System.out(1088): D/ddm-heap( 1088): Got feature list request
11-07 06:32:43.716: INFO/System.out(1088): I/mt ( 1088): success
11-07 06:32:43.766: INFO/System.out(1088): I/System.out( 1088): --------func start-------- 眼尖的读者估计看到这行了..还是被重复打印出来了，但是我也始终没办法了....就这两行，算了吧，我接受这个冗余，如果各位读者有办法解决...欢迎交流
11-07 06:32:43.805: INFO/System.out(1088): I/global ( 1088): Default buffer size used in BufferedReader constructor. It would be better to be explicit if an 8k-char buffer is required.
11-07 06:32:43.805: INFO/System.out(1088): -- is null --
11-07 06:32:43.805: INFO/System.out(1088): --------func end-------- 此处捕获的内容输出结束....
11-07 06:32:44.006: INFO/ActivityManager(52): Displayed activity mt.fzgh/.LogDemoActivity: 4038 ms (total 4038 ms)
11-07 06:32:49.196: DEBUG/dalvikvm(227): GC freed 43 objects / 2048 bytes in 126ms
11-07 06:32:54.236: DEBUG/dalvikvm(106): GC freed 2281 objects / 132056 bytes in 151ms
最后，感谢一下诸多前辈对编码经验的无私奉献....
这里指出一些本人参考过的代码和不足，csdn专家 xys 前辈也制作了 捕获log的demo程序，并且广为流传，不过经过亲测，似乎只能捕获 触发捕获事件 本身，
也是因为这个原因，我才觉得需要一个更加完善的程序来分享给大家，特发此文共勉。
附带一份logcat的 命令...不过好像 过滤器 指令有问题....慎用
| 选项 | 说明 |
| -s | 默认设置过滤器 |
| - f 文件 | 输出到日志文件 |
| -c | 清除日志 |
| -d | 获取日志 |
| -g | 获取日志的大小 |
| - v 格式 |
设置日志（见下面的格式打印格式）
|
| - v 格式 | 例 |
| brief | W/tag ( 876): message |
| process | W( 876) message (tag) |
| tag | W/tag : message |
| thread | W( 876:0x37c) message |
| raw | message |
| time | 09-08 05:40:26.729 W/tag ( 876): message |
| threadtime | 09-08 05:40:26.729 876 892 W tag : message |
| long | [ 09-08 05:40:26.729 876:0x37c W/tag ] message |
