KFBv1/app/src/main/java/com/kfb/kfbv1/model/LogFile.java

package com.kfb.kfbv1.model;

import android.os.Environment;
import android.text.format.Time;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.sql.Timestamp;


public class LogFile {
    public static void appendLog(String text)
    {

        Long tsLong = System.currentTimeMillis();
        String ts = tsLong.toString();
        text = ts + " - " +text;
        String m_path = Environment.getExternalStoragePublicDirectory(
                Environment.DIRECTORY_DCIM).getAbsolutePath();
        File logFile = new File( m_path+"/kfb.txt");
        if (!logFile.exists())
        {
            try
            {
                logFile.createNewFile();
            }
            catch (IOException e)
            {
                // TODO Auto-generated catch block
                e.printStackTrace();

            }
        }
        try
        {
            //BufferedWriter for performance, true to set append to file flag
            BufferedWriter buf = new BufferedWriter(new FileWriter(logFile, true));
            buf.append(text);
            buf.newLine();
            buf.close();
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}