购物车二级列表勾选联动

Main中点击监听

public class Main2Activity extends AppCompatActivity implements IView {
    private String murl = "http://www.wanandroid.com/tools/mockapi/6523/restaurant-list";
    private IPresenterImpl presenter;
    private CheckBox Check_All;
    private TextView All_Price;
    private TextView Go_To_JS;
    private RelativeLayout bottom_layout;
    private ExpandableListView erji_view;
    private List<Work.DataBean> mdatas = new ArrayList<>();
    private ErJiAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        initView();
        adapter = new ErJiAdapter(this,mdatas);
        erji_view.setAdapter(adapter);

        presenter.requestData(murl);

        setListener();
    }

    private void setListener() {


        adapter.setCallChecked(new ErJiAdapter.AdapterCallBack() {
            @Override
            public void setGroupCheckClick(int groupPosition) {
                boolean isallchecked = adapter.isChildAllChecked(groupPosition);
                adapter.setGridChecked(groupPosition,!isallchecked);
                adapter.notifyDataSetChanged();
                getbuttomAllLayout();
            }

            @Override
            public void setChildCheckClick(int groupPosition, int childPosition) {
                boolean ischildchecked = adapter.isChildChecked(groupPosition,childPosition);
                adapter.setChildChecked(groupPosition,childPosition,!ischildchecked);
                adapter.notifyDataSetChanged();
                getbuttomAllLayout();
            }

            @Override
            public void setSumNum(int groupPosition, int childPosition, int count) {
                adapter.setNumberChange(groupPosition,childPosition,count);
                adapter.notifyDataSetChanged();
                getbuttomAllLayout();
            }
        });
        Check_All.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                boolean boo = adapter.isAllGrid();
                adapter.setAllShopChecked(!boo);
                adapter.notifyDataSetChanged();
                getbuttomAllLayout();
            }
        });
    }

    private void initView() {
        Check_All = (CheckBox) findViewById(R.id.Check_All);
        All_Price = (TextView) findViewById(R.id.All_Price);
        Go_To_JS = (TextView) findViewById(R.id.Go_To_JS);
        bottom_layout = (RelativeLayout) findViewById(R.id.bottom_layout);
        erji_view = (ExpandableListView) findViewById(R.id.erji_view);
        erji_view.setGroupIndicator(null);

        presenter = new IPresenterImpl(this);
    }

    @Override
    public void showRequestData(Object data) {
        mdatas = (List<Work.DataBean>) data;
        adapter.setMdatas(mdatas);
        for(int i=0;i<adapter.getGroupCount();i++){
            erji_view.expandGroup(i);
        }
        erji_view.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
            @Override
            public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
                return true;
            }
        });

    }

    public void getbuttomAllLayout(){
        boolean boo = adapter.isAllGrid();
        Check_All.setChecked(boo);
        float mPrice = adapter.getPriceNumber();
        int mNumber = adapter.getChangeNumber();
        All_Price.setText("价格:"+mPrice);
        Go_To_JS.setText("去结算("+mNumber+")");
    }
}

二级列表的adapter:
public class ErJiAdapter extends BaseExpandableListAdapter {
    private Context context;
    private List<Work.DataBean> mdatas;

    public ErJiAdapter(Context context, List<Work.DataBean> mdatas) {
        this.context = context;
        this.mdatas = mdatas;
    }

    public void setMdatas(List<Work.DataBean> mdatas) {
        this.mdatas = mdatas;
        notifyDataSetChanged();

    }

    @Override
    public int getGroupCount() {
        return mdatas.size();
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        return mdatas.get(groupPosition).getSpus().size();
    }

    @Override
    public Object getGroup(int groupPosition) {
        return null;
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        return null;
    }

    @Override
    public long getGroupId(int groupPosition) {
        return 0;
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return 0;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    @Override
    public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        GroupHolder holder = null;
        if(convertView == null){
            holder = new GroupHolder();
            convertView = View.inflate(context,R.layout.group_list,null);
            holder.mGroupCheck = convertView.findViewById(R.id.Group_CB);
            holder.mGroupTv = convertView.findViewById(R.id.Group_Name);
            convertView.setTag(holder);
        }else{
            holder = (GroupHolder) convertView.getTag();
        }
        Work.DataBean dataBean = mdatas.get(groupPosition);
        holder.mGroupTv.setText(dataBean.getName());
        Boolean isallck = isChildAllChecked(groupPosition);
        holder.mGroupCheck.setChecked(isallck);
        holder.mGroupCheck.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(madapterCallBack!=null){
                    madapterCallBack.setGroupCheckClick(groupPosition);
                }
            }
        });
        return convertView;
    }

    @Override
    public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
        ChildHolder holder = null;
        if(convertView==null){
            holder = new ChildHolder();
            convertView = View.inflate(context,R.layout.child_item,null);
            holder.mChildCheck = convertView.findViewById(R.id.Child_Check_CB);
            holder.mChildTitle = convertView.findViewById(R.id.Child_title);
            holder.mImage = convertView.findViewById(R.id.Child_Icon);
            holder.mChildPrice = convertView.findViewById(R.id.Child_price);

            holder.addNumView = convertView.findViewById(R.id.footer_add);
            convertView.setTag(holder);
        }else{
            holder = (ChildHolder) convertView.getTag();
        }
        final Work.DataBean.SpusBean spusBean = mdatas.get(groupPosition).getSpus().get(childPosition);
        Glide.with(context).load(spusBean.getPic_url()).into(holder.mImage);
        holder.mChildTitle.setText(spusBean.getName()+"");
        holder.mChildPrice.setText(spusBean.getSkus().get(0).getPrice()+"");
        holder.mChildCheck.setChecked(spusBean.isChildboo());

        holder.addNumView.setNumber(spusBean.getPraise_num());
        holder.mChildCheck.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(madapterCallBack!=null){
                    madapterCallBack.setChildCheckClick(groupPosition,childPosition);
                }
            }
        });

        holder.addNumView.getNumClick(new ErjiFooterView.SetOnClick() {
            @Override
            public void setCountClick(int number) {
                if(madapterCallBack!=null){
                    madapterCallBack.setSumNum(groupPosition,childPosition,number);
                }
            }
        });
        return convertView;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return false;
    }

    class GroupHolder {
        private CheckBox mGroupCheck;
        private TextView mGroupTv;
    }

    class ChildHolder {
        private CheckBox mChildCheck;
        private TextView mChildTitle;
        private ImageView mImage;
        private TextView mChildPrice;
        private ErjiFooterView addNumView;
    }
    public void setGridChecked(int groupPosition,boolean boo){
        Work.DataBean dataBean = mdatas.get(groupPosition);
        List<Work.DataBean.SpusBean> spus = dataBean.getSpus();
        for(int i=0;i<spus.size();i++){
            Work.DataBean.SpusBean spusBean = spus.get(i);
            spusBean.setChildboo(boo);
        }
    };

    public boolean isChildAllChecked(int groupPosition){
        boolean boo = true;
        Work.DataBean dataBean = mdatas.get(groupPosition);
        List<Work.DataBean.SpusBean> spus = dataBean.getSpus();
        for(int i=0;i<spus.size();i++){
            Work.DataBean.SpusBean spusBean = spus.get(i);
            if(!spusBean.isChildboo()){
                return false;
            }
        }
        return boo;
    }
    public void setChildChecked(int groupPosition,int childPosition,boolean boo){
        Work.DataBean.SpusBean spusBean = mdatas.get(groupPosition).getSpus().get(childPosition);
        spusBean.setChildboo(boo);
    }
    public boolean isChildChecked(int groupPosition,int childPosition){
        Boolean childboo = mdatas.get(groupPosition).getSpus().get(childPosition).isChildboo();
        if(childboo){
            return true;
        }
        return false;
    }

    public boolean isAllGrid(){
        boolean boo = true;
        for(int i=0;i<mdatas.size();i++){
            Work.DataBean dataBean = mdatas.get(i);
            for(int j=0;j<dataBean.getSpus().size();j++){
                Work.DataBean.SpusBean spusBean = dataBean.getSpus().get(j);
                if(!spusBean.isChildboo()){
                    return false;
                }
            }
        }
        return boo;
    }

    public void setAllShopChecked(boolean boo){
        for(int i=0;i<mdatas.size();i++){
            Work.DataBean dataBean = mdatas.get(i);
            for(int j=0;j<dataBean.getSpus().size();j++){
                Work.DataBean.SpusBean spusBean = dataBean.getSpus().get(j);
                spusBean.setChildboo(boo);
            }
        }
    }

    public void setNumberChange(int groupPosition,int childPosition,int count){
        Work.DataBean.SpusBean spusBean = mdatas.get(groupPosition).getSpus().get(childPosition);
        spusBean.setPraise_num(count);
    }

    public float getPriceNumber(){
        float priceAll = 0;
        for(int i=0;i<mdatas.size();i++){
            Work.DataBean dataBean = mdatas.get(i);
            for(int j=0;j<dataBean.getSpus().size();j++){
                Work.DataBean.SpusBean spusBean = dataBean.getSpus().get(j);
                if(spusBean.isChildboo()){
                    priceAll += spusBean.getPraise_num()*Float.parseFloat(spusBean.getSkus().get(0).getPrice());
                }
            }
        }
        return priceAll;
    }
    public int getChangeNumber(){
        int number = 0;
        for(int i=0;i<mdatas.size();i++){
            Work.DataBean dataBean = mdatas.get(i);
            for(int j=0;j<dataBean.getSpus().size();j++){
                Work.DataBean.SpusBean spusBean = dataBean.getSpus().get(j);
                if(spusBean.isChildboo()){
                    number += spusBean.getPraise_num();
                }
            }
        }
        return number;
    }
    public interface AdapterCallBack{
        void setGroupCheckClick(int groupPosition);

        void setChildCheckClick(int groupPosition,int childPosition);

        void setSumNum(int groupPosition,int childPosition,int count);
    }
    private AdapterCallBack madapterCallBack;

    public void setCallChecked(AdapterCallBack adapterCallBack){
        this.madapterCallBack = adapterCallBack;
    }
}

recycleAdapter:
public class RecyGridAdapter extends RecyclerView.Adapter<RecyGridAdapter.ViewHolder> implements 					View.OnClickListener {

    private Context context;
    private List<PicBean.ResultsBean> mgrids;

    public RecyGridAdapter(Context context, List<PicBean.ResultsBean> mgrids) {
        this.context = context;
        this.mgrids = mgrids;
    }

    public void setMgrids(List<PicBean.ResultsBean> mgrids) {
        this.mgrids = mgrids;
        notifyDataSetChanged();
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View view = View.inflate(context,R.layout.grid_item,null);
        ViewHolder holder = new ViewHolder(view);
        return holder;
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder viewHolder, int i) {
        Glide.with(context).load(mgrids.get(i).getUrl()).into(viewHolder.imgGrid);
        viewHolder.titleGrid.setText(mgrids.get(i).getType());
        viewHolder.itemView.setOnClickListener(this);
        viewHolder.itemView.setTag(i);
    }

    @Override
    public int getItemCount() {
        return mgrids.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        private ImageView imgGrid;
        private TextView titleGrid;
        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            imgGrid = itemView.findViewById(R.id.img_grid);
            titleGrid = itemView.findViewById(R.id.title_grid_item);
        }
    }

    public interface SetOnGridClick{
        void setOnItemListenerClick(int i);
    }

    private SetOnGridClick msetOnGridClick;

    public void setOnCallBackClick(SetOnGridClick setOnGridClick){
        this.msetOnGridClick = setOnGridClick;
    }

    @Override
    public void onClick(View v) {
        msetOnGridClick.setOnItemListenerClick((int) v.getTag());
    }
}

自定义加减View:
public class JiaJianView extends LinearLayout implements View.OnClickListener {
    private TextView mAdd;
    private TextView mDelete;
    private TextView mNumber;
    //商品数量
    private int mCount;

    public JiaJianView(Context context, AttributeSet attrs) {
        super(context, attrs);
        LayoutInflater.from(context).inflate(R.layout.add_remove_view_layout, this);
        initViews();
    }

    private void initViews() {
        mAdd = findViewById(R.id.add_tv);
        mDelete = findViewById(R.id.delete_tv);
        mNumber = findViewById(R.id.product_number_tv);
        mAdd.setOnClickListener(this);
        mDelete.setOnClickListener(this);
    }

    //先给初始值赋值
    public void setNumber(int number) {
        this.mCount = number;
        mNumber.setText(number + "");
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.delete_tv:
                if (mCount > 0) {
                    mCount--;
                    mNumber.setText(mCount + "");
                    if (mCountChange!=null){
                        mCountChange.setCount(mCount);
                    }
                }else {
                    Toast.makeText(getContext(), "商品已售空", Toast.LENGTH_SHORT).show();
                }
                break;
            case R.id.add_tv:
                mCount++;
                mNumber.setText(mCount + "");
                if (mCountChange!=null){
                    mCountChange.setCount(mCount);
                }
                break;
        }
    }

    public interface OnCountChange {
        void setCount(int count);
    }

    private OnCountChange mCountChange;

    public void setOnChange(OnCountChange countChange) {
        this.mCountChange = countChange;
    }
}

presenter层:
public class IPresenterImpl implements IPresenter {
private IView iView;
private IModelImpl iModel;

public IPresenterImpl(IView iView) {
    this.iView = iView;
    iModel = new IModelImpl();
}

@Override
public void requestData(String murl) {
    iModel.startRequestData(murl, new MyCallBack() {
        @Override
        public void setData(Object data) {
            iView.showRequestData(data);
        }
    });
}

}
Model:
	public class IModelImpl implements IModel {
    private MyCallBack mcallBack;
    private Handler mhandler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if(msg.what==0){
                String jsonStr = (String) msg.obj;
                Gson gson = new Gson();
                Work work = gson.fromJson(jsonStr,Work.class);
                mcallBack.setData(work.getData());
            }
        }
    };
    @Override
    public void startRequestData(final String murl, MyCallBack callBack) {
        this.mcallBack = callBack;
        new Thread(new Runnable() {
            @Override
            public void run() {
                MyHttpUntils.getInstance().getAsync(murl, new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {
                        Log.e("onFailure",e.getMessage()+"onFailure");
                    }

                @Override
                public void onResponse(Call call, Response response) throws IOException {
                    String data = response.body().string();
                    mhandler.sendMessage(mhandler.obtainMessage(0,data));
                }
            });
        }
    }).start();
}
}

不要忘了 布局文件里checkbox 设置 focusable 为false
CheckBox
        android:id="@+id/Group_CB"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        
        -- focusable设置不强焦点 --
        android:focusable="false"

View层在main层回调方法:
@Override
    public void showRequestData(Object data) {
        mdatas = (List<Work.DataBean>) data;
        adapter.setMdatas(mdatas);
        //初试化时展开列表
        for(int i=0;i<adapter.getGroupCount();i++){
            erji_view.expandGroup(i);
        }
        //这个方法是点击无效 不能收回列表
        erji_view.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
            @Override
            public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
                return true;
            }
        });
}