public class DemoActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        if(BuildConfig.DEBUG){
            Logging.isRunning = true;
        }else{
            Logging.isRunning = false;
        }
        
       /**
        * print form :
        * class name : method name, line
        */
        Logging.i(); 
       /**
        * print form :
        * class name : method name, line, comment
        */  
        Logging.i("comment"); 
       /**
        * print form :
        * TAG : class name , method name, line, comment
        */
        Logging.i("TAG","comment"); 
       /**
        * print form :
        * class name : [object name], variable name, value
        */
        Logging.i(Object object); 
       /**
        * print form :
        * TAG : [object name], variable name, value
        */
        Logging.i(TAG,Object object); 
       /**
        * print form :
        * class name : [object name], variable name, value
        */
        Logging.i(Object object,"comment");
       /**
        * print form :
        * class name
        * comment
        * TAG : [object name], variable name, value
        */
        Logging.i(TAG,Object object,"comment");
       /**
        * print form :
        * class name : [object name] [index], variable name, value
        */
        Logging.i(ArrayList<?> arrayList); 
       /**
        * print form :
        * TAG : [object name] [index], variable name, value
        */
        Logging.i(TAG,ArrayList<?> arrayList); 
       /**
        * print form :
        * class name
        * comment
        * class name : [object name] [index], variable name, value
        */
        Logging.i(ArrayList<?> arrayList,"comment");
       /**
        * print form :
        * class name
        * comment
        * TAG : [object name] [index], variable name, value
        */
        Logging.i(TAG,ArrayList<?> arrayList,"comment");
       /**
        * print form :
        * class name
        * class name : [object name] [index], variable name, value
        */
        Logging.i(ArrayList<?> arrayList, int index); 
       /**
        * print form :
        * class name, index
        * TAG : [object name] [index], variable name, value
        */
        Logging.i(TAG,ArrayList<?> arrayList, int index); 
       /**
        * print form :
        * class name, index
        * comment
        * class name : [object name] [index], variable name, value
        */
        Logging.i(ArrayList<?> arrayList, int index,"comment");
       /**
        * print form :
        * class name, index
        * comment
        * TAG : [object name] [index], variable name, value
        */
        Logging.i(TAG,ArrayList<?> arrayList, int index,"comment");
       /**
        * print form :
        * class name, start index, end index
        * class name : [object name] [index], variable name, value
        */
        Logging.i(ArrayList<?> arrayList, int startIndex, int endIndex); 
       /**
        * Print Form :
        * class name, start index, end index
        * TAG : [object name] [index], variable name, value
        */
        Logging.i(TAG,ArrayList<?> arrayList, int startIndex, int endIndex); 
      /**
        * print form :
        * class name, start index, end index
        * comment
        * class name : [object name] [index], variable name, value
        */
        Logging.i(ArrayList<?> arrayList, int startIndex, int endIndex,"comment"); 
       /**
        * print form :
        * class name, start index, end index
        * comment
        * TAG : [object name] [index], variable name, value
        */
        Logging.i(Tag,ArrayList<?> arrayList, int startIndex, int endIndex,"comment"); 
        
        Logging.e();
        ...
        Logging.w();
        ...
        Logging.d();
        ...
        
        /**
         * print form :
         * class name : method name, line
         * json
         */
         Logging.json(Object object, LogSeparator logSeparator);
        
        /**
         * If you want to get a string log message
         * uses Same Logging.(i, e, w, d) parameter
         * @return String log messages.
         */
         Logging.getMessage( ... );
         
        /**
         * If you want to get a string lson Log message
         * @return String json log messages.
         */
         Logging.getJsonMessage(Object object);

    }
}