Android的ListView多选删除操作实现代码

最近尝试做了个listview的多选demo，网上看其他人的例子感觉不是很难，自己动手做了下，各种细节问题，没那么简单啊。既然做了，简单写个笔记记录下。
练手demo，命名笔记乱，不要介意哦。

主界面布局activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/rootView"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.listchecked.MainActivity" >

<ListView
 android:id="@+id/listView1"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_marginBottom="50dp"
 >

</ListView>

<LinearLayout
 android:id="@+id/button_group"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_alignLeft="@+id/listView1"
 android:layout_alignParentBottom="true"
 android:orientation="vertical" >

<Button
  android:id="@+id/del"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="删除" />
</LinearLayout>

</RelativeLayout>

列表item的布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:descendantFocusability="blocksDescendants" >
<!--注意上面这个属性，很关键，不加会导致list无法响应OnItemClickListener中的事件-->

<RelativeLayout
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:layout_weight="1"
 >

<CheckBox
  android:id="@+id/checkBox1"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:clickable="false"
  android:focusable="false" />

<ImageView
  android:id="@+id/imageView1"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:scaleType="fitCenter"
  android:src="@drawable/ic_launcher" />

</RelativeLayout>

<LinearLayout
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:layout_weight="1"
 android:gravity="center"
 android:orientation="vertical" >

<TextView
  android:id="@+id/title"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:text="Title"
  android:textSize="20sp" />

<TextView
  android:id="@+id/teacher"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:text="Teacher" />

<TextView
  android:id="@+id/time"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:text="Time" />

<TextView
  android:id="@+id/peopleNum"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:text="peopleNum"
   />

</LinearLayout>

</LinearLayout>

这个item的布局就被在细节上坑了一次，item中添加button，checkbox,imageButton等时，会导致只响应这些控件的事件，item整体的事件就不会响应了，刚开始没有加那条属性，勾选checkbox后，点删除没有反应。这问题要发现也有点难度，之前见大神们推荐过分析布局的工具hierarchyviewer，这个工具，个人感觉和前端开发中的F12类似啊，很方便，可以看到每个布局的情况。也是好奇，点开一看，整个item的布局，从父布局，到子布局，只要checkbox可以接受click，其他全部是false，这就是问题所在了，后来百度了一下，即如上结论。

解决办法就是添加Android:descendantFocusability=”blocksDescendants” 到list的item的布局里，添加以后，发现checkbox还是可以被单独点击，不响应list的点击选中事件，很是奇怪，看其他人的例子中就没有这种现象。最后只能设置checkbox不能被点击 android:clickable=”false” 布局问题解决了，下面是java类的源码:
首先是bean类，ItemBean.java

package com.example.listchecked;

public class ItemBean {
private int imgRes;
private String title,teacher,time;
private int peopleNum,id;
private boolean isChecked;
private boolean isShow;

public boolean isShow() {
 return isShow;
}
public void setShow(boolean isShow) {
 this.isShow = isShow;
}
public int getId() {
 return id;
}
public void setId(int id) {
 this.id = id;
}
public boolean isChecked() {
 return isChecked;
}
public void setChecked(boolean isChecked) {
 this.isChecked = isChecked;
}
public int getImgRes() {
 return imgRes;
}
public void setImgRes(int img) {
 this.imgRes = img;
}
public String getTitle() {
 return title;
}
public void setTitle(String title) {
 this.title = title;
}
public String getTeacher() {
 return teacher;
}
public void setTeacher(String teacher) {
 this.teacher = teacher;
}
public String getTime() {
 return time;
}
public void setTime(String time) {
 this.time = time;
}
public int getPeopleNum() {
 return peopleNum;
}
public void setPeopleNum(int peopleNum) {
 this.peopleNum = peopleNum;
}

}

自定义的Adapter，MyListAdapter.java

package com.example.listchecked;

import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.TextView;

public class MyListAdapter extends BaseAdapter
{
private LayoutInflater inflater;
private List<ItemBean> items;
private ItemBean item;
private OnShowItemClickListener onShowItemClickListener;

public MyListAdapter(List<ItemBean> list,Context context)
{
items=list;
inflater=LayoutInflater.from(context);
}
@Override
public int getCount() {
// TODO 自动生成的方法存根
return items.size();
}

@Override
public Object getItem(int position) {
// TODO 自动生成的方法存根
return items.get(position);
}

@Override
public long getItemId(int position) {
// TODO 自动生成的方法存根
return items.get(position).getId();
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO 自动生成的方法存根
ViewHolder holder;//使用ViewHolder，大神说能提升性能
if(convertView==null)
{
 holder=new ViewHolder();
 convertView=inflater.inflate(R.layout.item_view, null);
 holder.img=(ImageView) convertView.findViewById(R.id.imageView1);
 holder.cb=(CheckBox) convertView.findViewById(R.id.checkBox1);
 holder.title=(TextView)convertView.findViewById(R.id.title);
 holder.teacher=(TextView) convertView.findViewById(R.id.teacher);
 holder.time=(TextView) convertView.findViewById(R.id.time);
 holder.poeple=(TextView)convertView.findViewById(R.id.peopleNum);
 convertView.setTag(holder);
}else
{
 holder=(ViewHolder) convertView.getTag();
}
item=items.get(position);
if(item.isShow())
{
 holder.cb.setVisibility(View.VISIBLE);
}
else
{
 holder.cb.setVisibility(View.GONE);
}
holder.img.setImageResource(item.getImgRes());
holder.title.setText(item.getTitle());
holder.teacher.setText("主讲："+item.getTeacher());
holder.time.setText("课时："+item.getTime()+"讲");
holder.poeple.setText("学习人数："+item.getPeopleNum());

holder.cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {

@Override
 public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
 if(isChecked)
 {
  item.setChecked(true);
 }
 else
 {
  item.setChecked(false);
 }
 //回调方法，讲item加入已选择的
 onShowItemClickListener.onShowItemClick(item);
 }
});
//监听后设置选择状态
holder.cb.setChecked(item.isChecked());
return convertView;
}

static class ViewHolder
{
ImageView img;
CheckBox cb;
TextView title,teacher,time,poeple;

}

public interface OnShowItemClickListener {
public void onShowItemClick(ItemBean bean);
}

public void setOnShowItemClickListener(OnShowItemClickListener onShowItemClickListener) {
this.onShowItemClickListener = onShowItemClickListener;
}
}

最后是MainActivity.java

package com.example.listchecked;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.Toast;

import com.example.listchecked.MyListAdapter.OnShowItemClickListener;

public class MainActivity extends Activity implements OnShowItemClickListener {

private ListView listView;
private List<ItemBean> dataList,selectedList;
private MyListAdapter myAdapter;
private RelativeLayout rootView;
private LinearLayout menuView;
private LinearLayout openView;
private static boolean isShow;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
isShow=false;
setContentView(R.layout.activity_main);
Button delbtn=(Button) findViewById(R.id.del);
rootView=(RelativeLayout) findViewById(R.id.rootView);
menuView=(LinearLayout) findViewById(R.id.button_group);
listView=(ListView) findViewById(R.id.listView1);
dataList=new ArrayList<ItemBean>();
selectedList=new ArrayList<ItemBean>();
for(int i=0;i<10;i++)
{
 ItemBean item=new ItemBean();
 item.setId(i);
 item.setImgRes(R.drawable.ic_launcher);
 item.setTitle("第"+item.getId()+"个");
 item.setTeacher("杨老师");
 item.setTime("34");
 item.setPeopleNum(i+1*100);
 item.setChecked(false);
 item.setShow(isShow);
 dataList.add(item);
}
myAdapter=new MyListAdapter(dataList, this);
myAdapter.setOnShowItemClickListener(MainActivity.this);
listView.setAdapter(myAdapter);

delbtn.setOnClickListener(new OnClickListener() {

@Override
 public void onClick(View v) {
 // TODO 自动生成的方法存根
 showMenu();
 isShow=true;
 selectedList.clear();
 for(ItemBean item:dataList)
 {

item.setShow(isShow);
 }
 myAdapter.notifyDataSetChanged();

}
});
listView.setOnItemClickListener(new OnItemClickListener() {

@Override
 public void onItemClick(AdapterView<?> parent, View view,
  int position, long id) {
 // TODO 自动生成的方法存根
 if (isShow) {
  ItemBean item = dataList.get(position);
  boolean isChecked = item.isChecked();
  if (isChecked) {
   item.setChecked(false);
  } else {
   item.setChecked(true);
  }
  myAdapter.notifyDataSetChanged();
  Log.d("select",selectedList.size()+"");
 }
 }
});

}
//显示选择删除等的菜单
private void showMenu()
{
RelativeLayout.LayoutParams lp=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
 RelativeLayout.LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
openView=(LinearLayout) inflater.inflate(R.layout.delmenu_layout, null);
rootView.removeView(menuView);
rootView.addView(openView,lp);
final Button sBtn=(Button) openView.findViewById(R.id.selectAll);
Button dBtn=(Button) openView.findViewById(R.id.del_button);
Button cBtn= (Button) openView.findViewById(R.id.cancel_button);
sBtn.setOnClickListener(new OnClickListener() {

@Override
 public void onClick(View v) {
 // TODO 自动生成的方法存根
 if ("全选".equals(sBtn.getText().toString())) {
  for (ItemBean bean : dataList) {
   if (!bean.isChecked()) {
    bean.setChecked(true);
    if (!selectedList.contains(bean)) {
     selectedList.add(bean);
    }
   }
  }
  myAdapter.notifyDataSetChanged();
  sBtn.setText("反选");
 } else if ("反选".equals(sBtn.getText().toString())) {
  for (ItemBean bean : dataList) {
   bean.setChecked(false);
   if (!selectedList.contains(bean)) {
    selectedList.remove(bean);
   }
  }
  myAdapter.notifyDataSetChanged();
  sBtn.setText("全选");
 }
 }
});

dBtn.setOnClickListener(new OnClickListener() {

@Override
 public void onClick(View v) {
 // TODO 自动生成的方法存根
 if (selectedList!=null && selectedList.size()>0) {
  dataList.removeAll(selectedList);
  myAdapter.notifyDataSetChanged();
  selectedList.clear();
 } else {
  Toast.makeText(MainActivity.this, "请选择条目", Toast.LENGTH_SHORT).show();
 }
 }
});
cBtn.setOnClickListener(new OnClickListener() {

@Override
 public void onClick(View v) {
 // TODO 自动生成的方法存根
 if (isShow) {
  selectedList.clear();
  for (ItemBean bean : dataList) {
   bean.setChecked(false);
   bean.setShow(false);
  }
  myAdapter.notifyDataSetChanged();
  isShow = false;
  restoreView();
 }
 }
});

}
@Override
public void onShowItemClick(ItemBean bean) {
// TODO 自动生成的方法存根
if (bean.isChecked() && !selectedList.contains(bean)) {
 selectedList.add(bean);
} else if (!bean.isChecked() && selectedList.contains(bean)) {
 selectedList.remove(bean);
}
}

private void restoreView()
{
rootView.addView(menuView);
if(openView!=null)
{
 rootView.removeView(openView);
 openView=null;
}

}
}

最后还有那个小菜单的布局，还是放上吧

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >

<Button
 android:id="@+id/selectAll"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:text="全选" />

<Button
 android:id="@+id/del_button"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:text="删除" />

<Button
 android:id="@+id/cancel_button"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:text="取消" />

</LinearLayout>

全部代码都放上了，如果不想复制粘贴，GitHub地址：https://github.com/2767321434/ListChecked