StringUtil

import android.text.TextUtils;

import com.netease.nim.chatroom.demo.base.util.string.MD5;

import java.util.Locale;
import java.util.UUID;

public class StringUtil {
   
   public static String getPercentString(float percent) {
      return String.format(Locale.US, "%d%%", (int) (percent * 100));
   }
   /**
    * 删除字符串中的空白符
    *
    * @param content
    * @return String
    */
   public static String removeBlanks(String content) {
      if (content == null) {
         return null;
      }
      StringBuilder buff = new StringBuilder();
      buff.append(content);
      for (int i = buff.length() - 1; i >= 0; i--) {
         if (' ' == buff.charAt(i) || ('\n' == buff.charAt(i)) || ('\t' == buff.charAt(i))
               || ('\r' == buff.charAt(i))) {
            buff.deleteCharAt(i);
         }
      }
      return buff.toString();
   }
   /**
    * 获取32位uuid
    *
    * @return
    */
   public static String get32UUID() {
      return UUID.randomUUID().toString().replaceAll("-", "");
   }
   
   public static boolean isEmpty(String input) {
      return TextUtils.isEmpty(input);
   }
   
   /**
    * 生成唯一号
    *
    * @return
    */
   public static String get36UUID() {
      UUID uuid = UUID.randomUUID();
      String uniqueId = uuid.toString();
      return uniqueId;
   }
   
   public static String makeMd5(String source) {
      return MD5.getStringMD5(source);
   }
   
    public static final String filterUCS4(String str) {
      if (TextUtils.isEmpty(str)) {
         return str;
      }

      if (str.codePointCount(0, str.length()) == str.length()) {
         return str;
      }

      StringBuilder sb = new StringBuilder();

      int index = 0;
      while (index < str.length()) {
         int codePoint = str.codePointAt(index);
         index += Character.charCount(codePoint);
         if (Character.isSupplementaryCodePoint(codePoint)) {
            continue;
         }

         sb.appendCodePoint(codePoint);
      }

      return sb.toString();
   }

    /**
     * counter ASCII character as one, otherwise two
     *
     * @param str
     * @return count
     */
    public static int counterChars(String str) {
        // return
        if (TextUtils.isEmpty(str)) {
            return 0;
        }
        int count = 0;
        for (int i = 0; i < str.length(); i++) {
            int tmp = (int) str.charAt(i);
            if (tmp > 0 && tmp < 127) {
                count += 1;
            } else {
                count += 2;
            }
        }
        return count;
    }
}