我要评论把自己应用的调试信息写入到sd卡中。
package com.sdmc.hotel.util;
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 android.content.context;
import android.os.environment;
import android.util.log;
/**
* log日志统计保存
* 会打印i，e，w，不会打印d
* 每次开启应用，就会把上次的log信息覆盖
* @author way
*
*/
public class logcathelper {
private static logcathelper instance = null;
private static string path_logcat;
private logdumper mlogdumper = null;
private int mpid;
/**
*
* 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 + "minigps";
} 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 + "minigps";
}
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);
}
log.i("path", path_logcat);///storage/sdcard0/minigps
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, "gps-"
+ mydate.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 + ")\"";//会打印i，e，w，不会打印d
}
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 && (line = mreader.readline()) != null) {
if (!mrunning) {
break;
}
if (line.length() == 0) {
continue;
}
if (out != null && line.contains(mpid)) {
out.write((mydate.getdateen() + " " + line + "\n")
.getbytes());
}
}
} 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;
}
}
}
}
}
系统权限
<uses-permission android:name="android.permission.write_external_storage" /> <uses-permission android:name="android.permission.read_logs" />
时间工具类：
package com.sdmc.hotel.util;
import java.text.simpledateformat;
import java.util.date;
public class mydate {
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
}
}
方法的调用：
public class myapplication extends application {
@override
public void oncreate() {
logcathelper.getinstance(this).start();
}
}
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