单击单个项目,选择回收器视图中的所有项目

将新字段添加到 ViewAllInventoryDevicesDetails 班级:

public boolean showCheckbox = false;

向适配器添加一些助手方法:

private void showAllBoxes() {
    for (ViewAllInventoryDevicesDetails item : list) {
        item.showCheckbox = true;
    }
    notifyDataSetChanged();
}

private void hideAllBoxes() {
    for (ViewAllInventoryDevicesDetails item : list) {
        item.showCheckbox = false;
    }
    notifyDataSetChanged();
}

然后,在你的 onBindViewHolder()

@Override
public void onBindViewHolder(@NonNull final ListViewHolder holder, final int position) {
     ViewAllInventoryDevicesDetails item = list.get(position);
     holder.isSelected.setVisibility(item.showCheckbox ? View.VISIBLE : View.GONE);
}

你只需要打个电话 showAllBoxes() hideAllBoxes()

您需要在中添加一个布尔变量 ViewAllInventoryDevicesDetails class checkbox 是否选中 boolean isCheckSelected=false;

在这里我修改了你的代码:

public class ViewInventoryListAdapter extends RecyclerView.Adapter<ViewInventoryListAdapter.ListViewHolder> {

    private Context context;
    List<ViewAllInventoryDevicesDetails> list;
    private Button assignButton;
    private UserLoginResponseModel userLoginResponseModel;
    private android.support.v4.app.Fragment fragment;
    private FragmentManager fragmentManager;
    private FragmentActivity myContext;
    private Activity activity;
    private int counter = 0;
    private List<String> selectedDeviceSerialNumbers;
    private static CheckBox checkBox;
    private int selectedItem = -1; // -1 due to first time nothing selected


    public ViewInventoryListAdapter(Context context, List<ViewAllInventoryDevicesDetails> list, Button assign, UserLoginResponseModel model, Activity activity) {
        this.context = context;
        this.list = list;
        this.assignButton = assign;
        this.userLoginResponseModel = model;
        this.activity = activity;
    }

    @NonNull
    @Override
    public ListViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.from(context);
        View view = inflater.inflate(R.layout.view_all_inventory_listlayout_cardview, null);
        //Specifying Activity for Fragment Transaction
        activity = activity;
        myContext = (FragmentActivity) activity;
        //Iniallizing Fragment Manager
        fragmentManager = myContext.getSupportFragmentManager();
        selectedDeviceSerialNumbers = new ArrayList<>();
        checkBox = view.findViewById(R.id.view_inventory_checkbox);
        return new ViewInventoryListAdapter.ListViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull final ListViewHolder holder, final int position) {
        Typeface iconFont = FontManager.getTypeface(context, FontManager.FONTAWESOME);
        holder.deviceSerialNumber.setText(list.get(position).getSerialNumber());
        holder.deviceType.setText(list.get(position).getDeviceType());
        FontManager.markAsIconContainer(holder.deviceIcon, iconFont);

        if (selectedItem != -1 && selectedItem == position) {
            holder.isSelected.setVisibility(View.VISIBLE);
            //holder.isSelected.setVisibility(View.VISIBLE);
            assignButton.setVisibility(View.VISIBLE);
        } else {
            holder.isSelected.setVisibility(View.GONE);
            assignButton.setVisibility(View.GONE);
        }

        if (selectedDeviceSerialNumbers.get(position).getCheckSelected()) {
            holder.isSelected.setChecked(true);
        } else {
            holder.isSelected.setChecked(true);
        }


        holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View view) {
                if (selectedItem != -1) {
                    selectedItem = position;
                    showAllBoxes();
                } else {
                    selectedItem = -1;
                    hideAllBoxes();
                }


                return false;
            }
        });
        holder.isSelected.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                selectedDeviceSerialNumbers.get(position).setCheckSelected(!selectedDeviceSerialNumbers.get(position).getCheckSelected());
            notifyDataSetChanged(); 
            }
        });

        assignButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Bundle bundle = new Bundle();
                if (userLoginResponseModel != null) {
                    bundle.putSerializable("UserModel", userLoginResponseModel);
                    bundle.putSerializable("serialNumbers", (Serializable) selectedDeviceSerialNumbers);
                }
                fragment = new AssingSelectedDevicesFragment();
                fragment.setArguments(bundle);
                fragmentManager.beginTransaction()
                        .replace(R.id.flContent, fragment)
                        .commit();
            }
        });

    }

    private void showAllBoxes() {
        for (ViewAllInventoryDevicesDetails item : list) {
            item.showCheckbox = true;
        }
        notifyDataSetChanged();
    }

    private void hideAllBoxes() {
        for (ViewAllInventoryDevicesDetails item : list) {
            item.showCheckbox = false;
        }
        notifyDataSetChanged();
    }

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

    class ListViewHolder extends RecyclerView.ViewHolder {

        private TextView deviceType, deviceSerialNumber, deviceIcon;
        private CheckBox isSelected;

        public ListViewHolder(View itemView) {
            super(itemView);
            deviceType = itemView.findViewById(R.id.view_inventory_deviceType_textview);
            deviceSerialNumber = itemView.findViewById(R.id.view_inventory_serialNumber_textview);
            deviceIcon = itemView.findViewById(R.id.view_inventory_image_textview);
            isSelected = itemView.findViewById(R.id.view_inventory_checkbox);
        }

    }
}

您好您也可以通过使用回调(接口)来实现这一点

import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.TextView;

import java.util.ArrayList;

public class MyListAdapter extends RecyclerView.Adapter<MyListAdapter.ListViewHolder> {

    ArrayList<ListItemModel> myArrayList;
    ListClicklistener listClicklistener;

    public MyListAdapter(ArrayList<ListItemModel> myArrayList, ListClicklistener listClicklistener) {
        this.myArrayList = myArrayList;
        this.listClicklistener = listClicklistener;
    }

    @NonNull
    @Override
    public ListViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        return new ListViewHolder(LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_item, viewGroup, false));
    }

    @Override
    public void onBindViewHolder(@NonNull ListViewHolder listViewHolder, int i) {
        listViewHolder.tvTitle.setText(myArrayList.get(i).title);

        if (myArrayList.get(i).isCheckBoxShow) {
            listViewHolder.chkBox.setVisibility(View.VISIBLE);
        }
        listViewHolder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                listClicklistener.onListItemClick();
            }
        });
    }

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

    public class ListViewHolder extends RecyclerView.ViewHolder {
        TextView tvTitle;
        CheckBox chkBox;

        public ListViewHolder(@NonNull View itemView) {
            super(itemView);
            tvTitle = itemView.findViewById(R.id.tvTitle);
            chkBox = itemView.findViewById(R.id.chkBox);
        }
    }
}

使用一个接口

public interface ListClicklistener {
    void onListItemClick();
}

带回调的SetAdapter

myListAdapter = new MyListAdapter(myArrayList, new ListClicklistener() {
            @Override
            public void onListItemClick() {
                for (int i = 0; i < myArrayList.size(); i++) {
                    myArrayList.get(i).isCheckBoxShow = true;
                }
                myListAdapter.notifyDataSetChanged();
            }
        });