@SuppressLint("SimpleDateFormat")

     private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

     public static void LogWrite() {

         File file = new File(Constants.APP_PATH_LOG);

         if (!file.exists() || !file.isDirectory()) {

             file.mkdirs();

         }

         FileWriter fileWriter;

         StringBuilder log;

         try {

             Process process = Runtime.getRuntime().exec("logcat -d -v time");

             BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));

             log = new StringBuilder();

             String line;

             while ((line = bufferedReader.readLine()) != null) {

                 log.append(line);

                 log.append("\n");

             }

             fileWriter = new FileWriter(Environment.getExternalStorageDirectory() + "/" + “log-” + sdf.format(new Date()).substring(0, 10) + ".txt", true);

             fileWriter.write(log.toString());             fileWriter.flush();

             fileWriter.close();

             Runtime.getRuntime().exec("logcat -c");         } catch (IOException e) {

         } catch (OutOfMemoryError e) {

         }

     }