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首页 > 软件编程 > Android > Android的ListView多选删除

Android的ListView多选删除操作实现代码

作者：fonely__

这篇文章主要为大家详细介绍了Android的ListView多选删除操作实现代码，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

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。

运行界面1

运行界面2

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。

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