Android Log File Write writeLog(File logFile, String tag, String message, Throwable tr)

Description

write Log

License

Open Source License

Declaration

public static synchronized void writeLog(File logFile, String tag,
            String message, Throwable tr) 

Method Source Code

//package com.java2s;
/*//from ww w.j  ava 2 s. c om
 * @(#)LogUtil.java             Project: crash
 * Date:2014-5-27
 *
 * Copyright (c) 2014 CFuture09, Institute of Software, 
 * Guangdong Ocean University, Zhanjiang, GuangDong, China.
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.BufferedWriter;
import java.io.Closeable;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Locale;

public class Main {
    private static final SimpleDateFormat timeFormat = new SimpleDateFormat(
            "MM-dd HH:mm:ss.SSS", Locale.getDefault());

    public static synchronized void writeLog(File logFile, String tag,
            String message, Throwable tr) {
        logFile.getParentFile().mkdirs();
        if (!logFile.exists()) {
            try {
                logFile.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        String time = timeFormat.format(Calendar.getInstance().getTime());
        synchronized (logFile) {
            FileWriter fileWriter = null;
            BufferedWriter bufdWriter = null;
            PrintWriter printWriter = null;
            try {
                fileWriter = new FileWriter(logFile, true);
                bufdWriter = new BufferedWriter(fileWriter);
                printWriter = new PrintWriter(fileWriter);
                bufdWriter.append(time).append(" ").append("E").append('/')
                        .append(tag).append(" ").append(message)
                        .append('\n');
                bufdWriter.flush();
                tr.printStackTrace(printWriter);
                printWriter.flush();
                fileWriter.flush();
            } catch (IOException e) {
                closeQuietly(fileWriter);
                closeQuietly(bufdWriter);
                closeQuietly(printWriter);
            }
        }
    }

    public static void closeQuietly(Closeable closeable) {
        if (closeable != null) {
            try {
                closeable.close();
            } catch (IOException ioe) {
                // ignore
            }
        }
    }
}

Related

1. WriteLogToSDCard(Context context, String tag, String logFileName, String msg)