ExpandableListView复选操作

最新推荐文章于 2021-06-03 14:57:10 发布

fire_nirvana

最新推荐文章于 2021-06-03 14:57:10 发布

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分类专栏： Android 文章标签： expandablelistview android开发 checkbox

本文链接：https://blog.youkuaiyun.com/fire_nirvana/article/details/70767395

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本文介绍了一种在Android应用中实现ExpandableListView带有父子层级复选框功能的方法。通过自定义适配器和实体类，确保了父项与子项复选状态的一致性，并避免了滑动时可能出现的数据错乱问题。

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今天公司有一个需求是ExpandableListView包含复选操作,应为没有做过双层的复选所以写一篇博客,希望对看到的人有所启发其中有队ChecxBox添加标记防止ChecxBox选择错位，对这块不了解的可以看一下我的当ListView的item为CheckBox,EditText,Spinner的时候处理滑动数据错乱这篇文章。

那么先来看看MainActivity的代码

public class MainActivity extends AppCompatActivity {
    //适配器
    private ExpandableAdapter adapter;
    @BindView(R.id.mListView)
    ExpandableListView mListView;
    //数据源
    private List<ParentInfo> lists=new ArrayList<ParentInfo>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        init();
        //引用
        adapter=new ExpandableAdapter(this,lists);
        mListView.setAdapter(adapter);
    }
    //初始化数据
    private void init(){
        for(int i=0;i<10;i++){
          ParentInfo po=new ParentInfo();
            ArrayList<ChildInfo> list=new ArrayList<ChildInfo>();
            po.setTitle("哈哈"+i);
            for (int j = 0; j <5; j++) {
                ChildInfo chd=new ChildInfo();
                chd.setTitle("呵呵"+j);
                list.add(chd);
            }
            po.setChildList(list);
            lists.add(po);
        }
    }
}

可以看到在MainActivity中我们的代码是很少的主要的代码都在ExpandableAdapter中

package com.demo;import java.util.ArrayList;import java.util.List;import com.ypy.eventbus.EventBus;import android.content.Context;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseExpandableListAdapter;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.TextView;public class ExpandableAdapter extends BaseExpandableListAdapter  {
 private Context context;
 private List<TestInfo> list;
 private boolean isAll=false;
 public ExpandableAdapter(Context context, List<TestInfo> list) {
 super();
 this.context = context;
 this.list = list;
 }
 public List<TestInfo> getList() {
 return list;
 }
 public ExpandableAdapter() {
 super();
 }
 @Override
 public int getGroupCount() {
 return list.size();
 }
 @Override
 public int getChildrenCount(int groupPosition) {
 return list.get(groupPosition).getChild().size();
 }
 @Override
 public Object getGroup(int groupPosition) {
 return list.get(groupPosition);
 }
 @Override
 public Object getChild(int groupPosition, int childPosition) {
 return list.get(groupPosition).getChild().get(childPosition);
 }
 @Override
 public long getGroupId(int groupPosition) {
 return 0;
 }
 @Override
 public long getChildId(int groupPosition, int childPosition) {
 return 0;
 }
 @Override
 public boolean hasStableIds() {
 return false;
 }
 ViewHolder vh;
 @Override
 public View getGroupView(int groupPosition, boolean isExpanded,
 View v, ViewGroup parent) {
 if(v==null){
 v=LayoutInflater.from(context).inflate(R.layout.item, null,false);
 vh=new ViewHolder(v);
 vh.chx_parent.setOnCheckedChangeListener(new MyParentCheckedChangeListener(vh.chx_parent)); 
 v.setTag(vh);
 }else{
 vh=(ViewHolder) v.getTag();
 }
 TestInfo ts=list.get(groupPosition);
 vh.chx_parent.setFocusable(false);
 vh.tv_parent.setText(ts.getTitle());
 vh.chx_parent.setTag(groupPosition);
 vh.chx_parent.setChecked(ts.isChecx());
 return v;
 }
 class MyParentCheckedChangeListener implements OnCheckedChangeListener{
 CheckBox check;
 public MyParentCheckedChangeListener() {
 super();
 }
 public MyParentCheckedChangeListener(CheckBox check) {
 super();
 this.check = check;
 }
 @Override
 public void onCheckedChanged(CompoundButton buttonView,
 boolean isChecked) {
 int index=(Integer) check.getTag();
 TestInfo test=list.get(index);
 ArrayList<ChildInfo> child=test.getChild();
 int size=child.size();
 boolean ischex=false;
 if(isChecked){
 for (int i = 0; i<size; i++) {
 child.get(i).setChecx(true);
 }
 test.setChecx(isChecked);
 }else{
 for (int i = 0; i<size; i++) {
 if(child.get(i).isChecx()){
 ischex=true;
 }else{
 ischex=false;
 break;
 }
 }
 if(ischex){
 for (int i = 0; i<size; i++) {
 child.get(i).setChecx(false);
 }
 test.setChecx(false);
 }else{
 test.setChecx(false);
 }
 }
 init();
 EventBus.getDefault().post(new RefreshEvent(isAll));
 notifyDataSetChanged();
 }
 }
 ViewHolder2 vh2;
 @Override
 public View getChildView(int groupPosition, int childPosition,
 boolean isLastChild, View v, ViewGroup parent) {
 if(v==null){
 v=LayoutInflater.from(context).inflate(R.layout.item_child, null,false);
 vh2=new ViewHolder2(v);
 vh2.chx_child.setOnCheckedChangeListener(new MyChildCheckedChangeListener(vh2.chx_child));
 v.setTag(vh2);
 }else{
 vh2=(ViewHolder2) v.getTag();
 }
 TestInfo ts=list.get(groupPosition);
 ArrayList<ChildInfo> titls=ts.getChild();
 vh2.chx_child.setFocusable(false);
 Bundle bund=new Bundle();
 bund.putInt("parent", groupPosition);
 bund.putInt("child", childPosition);
 vh2.chx_child.setTag(bund);
 vh2.tv_child.setText(titls.get(childPosition).getTitle());
 vh2.chx_child.setChecked((titls.get(childPosition).isChecx()));
 return v;
 }
 class MyChildCheckedChangeListener implements OnCheckedChangeListener{
 CheckBox check;
 public MyChildCheckedChangeListener() {
 super();
 }
 public MyChildCheckedChangeListener(CheckBox check) {
 super();
 this.check = check;
 }
 @Override
 public void onCheckedChanged(CompoundButton buttonView,
 boolean isChecked) {
 Bundle bund=(Bundle) check.getTag();
 int parent=bund.getInt("parent");
 int child=bund.getInt("child");
 TestInfo test=list.get(parent);
 ArrayList<ChildInfo> childInfo=test.getChild();
 ChildInfo co=childInfo.get(child);
 co.setChecx(isChecked);
 int size=childInfo.size();
 boolean ischex=false;
 for (int i = 0; i<size; i++) {
 if(childInfo.get(i).isChecx()){
 ischex=true;
 }else{
 ischex=false;
 break;
 }
 }
 test.setChecx(ischex);
 init();
 EventBus.getDefault().post(new RefreshEvent(isAll));
 notifyDataSetChanged();
 }
 }
 @Override
 public boolean isChildSelectable(int groupPosition, int childPosition) {
 return false;
 }
 class ViewHolder{
 private TextView tv_parent;
 private CheckBox chx_parent;
 public ViewHolder() {
 super();
 }
 public ViewHolder(View v) {
 tv_parent=(TextView) v.findViewById(R.id.tv_parent);
 chx_parent=(CheckBox) v.findViewById(R.id.chx_parent);
 }
 }
 class ViewHolder2{
 private TextView tv_child;
 private CheckBox chx_child;
 public ViewHolder2() {
 super();
 }
 public ViewHolder2(View v) {
 tv_child=(TextView) v.findViewById(R.id.tv_child);
 chx_child=(CheckBox) v.findViewById(R.id.chx_child);
 }
 }
 private void init(){
 for (int i = 0; i <10; i++) {
 TestInfo tt=new TestInfo();
 if(tt.isChecx()){
 isAll=true;
 }else{
 isAll=false;
 break;
 }
 ArrayList<ChildInfo> list=tt.getChild();
 for (int j = 0; j <5; j++) {
 ChildInfo childInfo=list.get(i);
 if(childInfo.isChecx()){
 isAll=true;
 }else{
 isAll=false;
 break;
 }
 }
 if(isAll==false){
 break;
 }
 }
 }}

通过实体bean来判断是否选中

public class ChildInfo implements Serializable {
    //子项标题
    private String title;
    //子项是否被选中
    private boolean isCheck;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public boolean isCheck() {
        return isCheck;
    }

    public void setCheck(boolean check) {
        isCheck = check;
    }
}

package com.kotlintest;

import java.io.Serializable;
import java.util.ArrayList;

/**
 * Created by liuqiang on 2017/4/25.
 */

public class ParentInfo implements Serializable{
    //父级标题
    private String title;
    //对应的一个或多个子项
    private ArrayList<ChildInfo> childList;
    //父级是否选中
    private boolean isChecx;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public ArrayList<ChildInfo> getChildList() {
        return childList;
    }

    public void setChildList(ArrayList<ChildInfo> childList) {
        this.childList = childList;
    }

    public boolean isChecx() {
        return isChecx;
    }

    public void setChecx(boolean checx) {
        isChecx = checx;
    }
}

最后在附上我的布局文件

//activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    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"
    tools:context="com.kotlintest.MainActivity">

    <ExpandableListView
        android:id="@+id/mListView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scrollbars="none"
        >

    </ExpandableListView>


</android.support.constraint.ConstraintLayout>

//item.xml

<?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.support.v7.widget.LinearLayoutCompat
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="50dp"
        android:layout_marginRight="30dp"
        android:layout_marginTop="10dp"
        android:orientation="horizontal"
        >

        <TextView
            android:id="@+id/tv_parent"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:textSize="16dp"
            android:layout_weight="9" />

        <CheckBox
            android:id="@+id/chx_parent"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            />

    </android.support.v7.widget.LinearLayoutCompat>

</LinearLayout>

//item_chil.xml

<?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.support.v7.widget.LinearLayoutCompat
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="30dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="10dp"
        android:orientation="horizontal"
        >

        <TextView
            android:id="@+id/tv_child"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:textSize="16dp"
            android:layout_weight="9" />

        <CheckBox
            android:id="@+id/chx_child"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            />
    </android.support.v7.widget.LinearLayoutCompat>

</LinearLayout>