public static String getSubStr(String _str, int _max){
int int_byte = 0;;
String returnStr = "";
for(int i=0 ; i<_max ; i++){
String temp = "";
temp = ""+_str.charAt(i);
int_byte = int_byte+temp.getBytes().length;
if(int_byte<=_max){
returnStr = returnStr+temp;
}else{
break;
}
}
return returnStr;
}