ListUtil.java

package com.sogouchat.util;

import java.util.Comparator;

import com.sogouchat.bean.MsgNode;
import com.sogouchat.bean.TelNode;

public class ListUtil {

	public static class  SortByTelPinyin implements Comparator<Object> {
		public int compare(Object o1, Object o2) {
			TelNode item1 = (TelNode) o1;
			TelNode item2 = (TelNode) o2;
			boolean item1Null;
			boolean item2Null;
			int result=0;
			if (item1.mPinyin == null || item1.mPinyin.length() == 0 ) {
				item1Null = true;
			} else {
				item1Null = false;
			}
			if (item2.mPinyin == null || item2.mPinyin.length() == 0) {
				item2Null = true;
			} else {
				item2Null = false;
			}
			if (item1Null && !item2Null) {
				result =-1;
			} else if (item2Null && !item1Null) {
				result =1;
			} else if (item1Null && item2Null) {
				result =0;
			} else {
				if (item1.mPinyin.charAt(0) > item2.mPinyin.charAt(0)){
					result= 1;
				}	else if (item1.mPinyin.charAt(0) < item2.mPinyin.charAt(0)){
					result= -1;
				}	else {
					result = 0;
				}
			}
			return result;
		}
	}
	
	public static class SortByMsgDate implements Comparator<Object> {
		public int compare(Object o1, Object o2) {
			MsgNode item1 = (MsgNode) o1;
			MsgNode item2 = (MsgNode) o2;
			if (item1 == null){
				return -1;
			}
			else if (item2 == null){
				return 1;
			}
			if (item1.mDate > item2.mDate)
				return 1;
			else if (item1.mDate < item2.mDate)
				return -1;
			else 
				return 0;
		}
	}
	
}