

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" > <ListViewandroid:id="@+id/listView1"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginBottom="50dp"> </ListView> <LinearLayoutandroid: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--> <RelativeLayoutandroid: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> <LinearLayoutandroid: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。
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.javapackage 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() {@Overridepublic 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.javapackage 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() {@Overridepublic 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() {@Overridepublic 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() {@Overridepublic 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() {@Overridepublic 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() {@Overridepublic 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" > <Buttonandroid:id="@+id/selectAll"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_weight="1"android:text="全选" /> <Buttonandroid:id="@+id/del_button"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_weight="1"android:text="删除" /> <Buttonandroid: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