本文共 6444 字，大约阅读时间需要 21 分钟。

首先是源码下载：

运行截图如下：

刚开始运行：

按分数排序后：

长按选中要删除的对象

确定删后

IDE为Android Studio 2.3.3

内容包括：

1.点击

2.长按

3.使用Adapter

MainActivity源码如下：

package example.demo4;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;import java.util.ArrayList;import java.util.Collections;import java.util.Comparator;import java.util.Iterator;public class MainActivity extends AppCompatActivity {    //数据源    ArrayList
   
     listData=new ArrayList();    MyListAdapter listAdapter;    boolean selectMode=false;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //数据        listData.add(new Student("QiuQiu",false,100));        listData.add(new Student("TuiTui",false,98));        listData.add(new Student("ZXM",true,59));        listData.add(new Student("MeiY",true,99));        listData.add(new Student("SB",true,58));        listAdapter=new MyListAdapter();        //获取Listview        ListView listView=(ListView)findViewById(R.id.id_listview);        listView.setAdapter(listAdapter);        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView
     parent, View view, int position, long id) {                Student s = (Student) listAdapter.getItem(position);                Toast.makeText(MainActivity.this, "点击了" + s.name, Toast.LENGTH_SHORT).show();                if(selectMode){                    Student S=(Student)listAdapter.getItem(position);                    S.selected=!S.selected;                    listAdapter.notifyDataSetChanged();                }            }        });        listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {            @Override            public boolean onItemLongClick(AdapterView
     parent, View view, int position, long id) {                Toast.makeText(MainActivity.this, "不要长按", Toast.LENGTH_SHORT).show();                selectMode=true;                //选中这一项                Student s=(Student)listAdapter.getItem(position);                s.selected=true;                listAdapter.notifyDataSetChanged();                return true;            }        });    }    public void doSortByName(View view){        listAdapter.sortByName();    }    public  void doSortByScore(View view){        listAdapter.sortByScore();    }    private class Student{        public String name;        public boolean sex;        public boolean selected;//是否选中        public int score;        public Student(String name,boolean sex,int score){            this.name=name;            this.sex=sex;            this.score=score;        }    }    //写listview的时候总会写一个适配器    private class MyListAdapter extends BaseAdapter{        Drawable[] icons=new Drawable[2];        Drawable[] iconsel=new Drawable[2];        //数据副本        ArrayList
    
      dataCopy=new ArrayList();        public void sortByName() {            // 对副本排序（不影响原始数据）            Collections.sort(listData,new java.util.Comparator
     
      (){                @Override                public int compare(Student o1, Student o2)                {                    return o1.name.compareTo(o2.name);                }            });            // 通知ListView刷新显示            notifyDataSetChanged();        }        public void sortByScore() {            Collections.sort(listData,new Comparator
      
       (){                @Override                public int compare(Student o1, Student o2)                {                    if(o1.score > o2.score) return 1;                    else if(o1.score== o2.score) return 0;                    else return -1;                }            });            notifyDataSetChanged();        }        public MyListAdapter(){            icons[0]=MainActivity.this.getDrawable(R.drawable.img_woman);            icons[1]=getDrawable(R.drawable.img_man);            iconsel[0]=getDrawable(R.drawable.img_uncheck);            iconsel[1]=getDrawable(R.drawable.img_check);        }        @Override        public int getCount() {            return listData.size();        }        @Override        public Object getItem(int position) {            return listData.get(position);        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            //创建控件            if(convertView==null){                convertView=getLayoutInflater().inflate(R.layout.list_item_student,parent,false);            }            //获取数据            Student data=(Student)getItem(position);            //显示数据            TextView textView=(TextView)convertView.findViewById(R.id.id_textView);            textView.setText(data.name+"分数："+data.score);            ImageView imageView=(ImageView)convertView.findViewById(R.id.id_imageView);            if(data.sex)                imageView.setImageDrawable(icons[1]);            else                imageView.setImageDrawable(icons[0]);            //选择模式            imageView = (ImageView)convertView.findViewById(R.id.id_icon_select);            if(!selectMode){                imageView.setVisibility(View.GONE);            }            else{                imageView.setVisibility(View.VISIBLE);                if(data.selected)                    imageView.setImageDrawable(iconsel[1]);                else                    imageView.setImageDrawable(iconsel[0]);            }            return convertView;        }    }    public void cancelSelecting(View view){        //清除选中状态        for(Student s:listData){            s.selected=false;        }        //退出选择模式        selectMode=false;        listAdapter.notifyDataSetChanged();    }    public void removeSelected(View view){        Iterator
       
         iter=listData.iterator();        while(iter.hasNext()){            Student s=iter.next();            if(s.selected){                iter.remove();            }        }        selectMode=false;        listAdapter.notifyDataSetChanged();;    }}
       
      
     
    
   

转载地址：https://it1995.blog.csdn.net/article/details/79167628 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！