android log记录文件,分享一个简单的Android日志文件记录类

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.PrintWriter;

import java.io.StringWriter;

import java.text.SimpleDateFormat;

import java.util.Date;

public class MusicLog

{

private static MusicLog mMusicLog;

/**日志保存路径*/

private static final String LOG_SAVE_PATH = "sdcard/StackTraceLog/";

/**日志开关*/

private static final boolean LOG_SWITCH = false;

public static MusicLog MusicLogInstance(){

if(mMusicLog == null){

mMusicLog = new MusicLog();

}

return mMusicLog;

}

/**插入日志*/

public void addLog(String logStr){

if(LOG_SWITCH){

File file = checkLogFileIsExist();

if(file == null)

return;

FileOutputStream fos = null;

try

{

fos = new FileOutputStream(file, true);

fos.write((new Date().toLocaleString() + "" + logStr).getBytes("gbk"));

fos.write("\r\n".getBytes("gbk"));

}

catch (FileNotFoundException e)

{

e.printStackTrace();

}

catch (IOException e)

{

e.printStackTrace();

}

finally{

try

{

if(fos != null){

fos.close();

fos = null;

}

}

catch (IOException e)

{

e.printStackTrace();

}

fos = null;

file = null;

}

}

}

/**检查日志文件是否存在*/

private File checkLogFileIsExist(){

if(!MemorySpaceManager.isSDExist()){

return null;

}

File file = new File(LOG_SAVE_PATH);

if(!file.exists()){

file.mkdirs();

}

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

String dateStr = sdf.format(new Date());

file = new File(LOG_SAVE_PATH + dateStr + ".txt");

if(!isLogExist(file)){

try

{

file.createNewFile();

}

catch (IOException e)

{

e.printStackTrace();

}

}

sdf = null;

return file;

}

/**

* 检查当天日志文件是否存在

* @param file

* @return

*/

private boolean isLogExist(File file){

File tempFile = new File(LOG_SAVE_PATH);

File[] files = tempFile.listFiles();

for(int i = 0; i < files.length; i++){

if(files[0].getName().trim().equalsIgnoreCase(file.getName())){

return true;

}

}

return false;

}

/**

* 打印异常堆栈信息

* @param e

* @return

*/

public static String getExceptionStackTrace(Throwable e){

if(e != null){

StringWriter sw = new StringWriter();

PrintWriter pw = new PrintWriter(sw);

e.printStackTrace(pw);

return sw.toString();

}

return "";

}

}