对ArrayList中按照T的某个属性进行排序_android 快速实现arraylist根据某个属性排序

对ArrayList中按照T的某个属性进行排序

1、先定义一个比较的方法

    public class A implements Comparator<Object> {
        public int compare(Object o1, Object o2) {
            C c1=(C)o1;
            C c2=(C)o2;
            int flag=c1.getStuDate().compareTo(c2.getStuDate());
            Log.i("MainActivity","----"+flag);
            return flag;
        }
    }
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2、书写数据源ArrayList中实体类T

package com.xht.android.sortstime;

/**
 * Created by Administrator on 2016-10-17.
 */

public class C {
        private String stuDate;
        private String stuName;
        private String stuSex;

        /**
         * @return the stuName
         */
        public String getStuName() {
            return stuName;
        }
        /**
         * @return the stuDate
         */
        public String getStuDate() {
            return stuDate;
        }
        /**
         * @param stuDate the stuDate to set
         */
        public void setStuDate(String stuDate) {
            this.stuDate = stuDate;
        }
        /**
         * @param stuName the stuName to set
         */
        public void setStuName(String stuName) {
            this.stuName = stuName;
        }
        /**
         * @return the stuSex
         */
        public String getStuSex() {
            return stuSex;
        }
        /**
         * @param stuSex the stuSex to set
         */
        public void setStuSex(String stuSex) {
            this.stuSex = stuSex;
        }
    }
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3、主活动中获取数据源ArrayList的数据，打印出原集合中的数据

 //原集合中的数据
    for(int i=0;i<list.size();i++){
        C c=list.get(i);
        Log.i(TAG, "--------;"+c.getStuDate()+" "+c.getStuName()+"  "+c.getStuSex());
    }
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4、按照时间先后顺序对集合排序，并输出

  //按时间先后排序后的数据   日期：前--->>后
    Log.i(TAG, "--------;-----------");
    A cm = new A();
    Collections.sort(list,cm);
    for(int i=0;i<list.size();i++){
        C c=list.get(i);
        Log.i(TAG, "--------;"+c.getStuDate()+" "+c.getStuName()+"  "+c.getStuSex());
    }
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