Android将应用调试log信息保存在SD卡的方法

概述把自己应用的调试信息写入到SD卡中。packagecom.sdmc.hotel.util;importjava.io.BufferedReader;

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/miniGPSmLogDumper.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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