Android Open Source - Android-J0Util Log Util

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License

The source code is released under:

MIT License

Java Source Code

/*
 * The MIT License Copyright (c) 2014 Krayushkin Konstantin (jangokvk@gmail.com)
 */*from   w w  w.  j av a2 s  .c o  m*/
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
 * associated documentation files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or
 * substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
 * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package ru.jango.j0util;

import android.util.Log;

/**
 * Utility class for better log usage: log tag consists of {@link #LOG_TAG} and class name,
 * so you could filter messages from a certain class.
 * <br /><br />
 * {@link #LOG_TAG} in not final, so u can change it, simply assign: <br />
 * LogUtil.LOG_TAG = "some_new_log_tag"
 */
public class LogUtil {

  public static String LOG_TAG = "j0";

  public static <T> String getLogTag(Class<T> c) {
    return (LOG_TAG + ":" + c.getName());
  }

  public static void i(Class<?> c, String msg) {
    Log.i(getLogTag(c), msg);
  }
  
  public static void e(Class<?> c, String msg) {
    Log.e(getLogTag(c), msg);
  }
  
  public static void d(Class<?> c, String msg) {
    Log.d(getLogTag(c), msg);
  }
  
  public static void w(Class<?> c, String msg) {
    Log.w(getLogTag(c), msg);
  }
  
  public static void logMemoryUsage() {
    final Runtime r = Runtime.getRuntime();
    final String memUse = "using " + formatNumber(r.totalMemory() - r.freeMemory())
        + " memory of " + formatNumber(r.totalMemory()) + " total";
    Log.i(LOG_TAG, memUse);
  }
  
  protected static String formatNumber(long n) {
    final String DELIMITER = ".";
    final StringBuilder num = new StringBuilder(String.valueOf(n));
    final StringBuilder fNum = new StringBuilder();
    
    int i = 0;
    num.reverse();
    while (i < num.length()) {
      fNum.insert(0,num.charAt(i));
      
      i++;
      if (i%3 == 0 && i != num.length()) fNum.insert(0, DELIMITER);
    }
    
    return fNum.toString();
  }
}

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