src/com/android/exchange/utility/FileLogger.java

package com.android.exchange.utility;

import android.content.Context;

import java.io.FileWriter;
import java.io.IOException;
import java.util.Date;

public class FileLogger {
    private static FileLogger LOGGER = null;
    private static FileWriter mLogWriter = null;
    public static String LOG_FILE_NAME = "/sdcard/emaillog.txt";
    private static Object mLock = new Object();

    public synchronized static FileLogger getLogger (Context c) {
        LOGGER = new FileLogger();
        return LOGGER;
    }

    private FileLogger () {
        synchronized (mLock) {
            try {
                mLogWriter = new FileWriter(LOG_FILE_NAME, true);
            } catch (IOException e) {
                // Doesn't matter
            }
        }
    }

    static public synchronized void close() {
        if (mLogWriter != null) {
            try {
                mLogWriter.close();
            } catch (IOException e) {
                // Doesn't matter
            }
            mLogWriter = null;
        }
    }

    @SuppressWarnings("deprecation")
    static public synchronized void log (String prefix, String str) {
        if (LOGGER == null) {
            LOGGER = new FileLogger();
            log("Logger", "\r\n\r\n --- New Log ---");
        }
        Date d = new Date();
        int hr = d.getHours();
        int min = d.getMinutes();
        int sec = d.getSeconds();

        StringBuffer sb = new StringBuffer(256);
        sb.append('[');
        sb.append(hr);
        sb.append(':');
        if (min < 10)
            sb.append('0');
        sb.append(min);
        sb.append(':');
        if (sec < 10) {
            sb.append('0');
        }
        sb.append(sec);
        sb.append("] ");
        if (prefix != null) {
            sb.append(prefix);
            sb.append("| ");
        }
        sb.append(str);
        sb.append("\r\n");
        String s = sb.toString();

        synchronized (mLock) {
            if (mLogWriter != null) {
                try {
                    mLogWriter.write(s);
                    mLogWriter.flush();
                } catch (IOException e) {
                    // Doesn't matter
                }
            }
        }
    }
}