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

以上就是本文的全部内容，希望对大家学习android软件编程有所帮助。