Get list of checked checkboxes from recyclerview android

Question

I have populated the recyclerView with image, title and checkbox. I have two problems.

1. How to make the checkbox selected when the imageview or the whole rec

Answer 1

This work for me and will work for you as well Just Create Static List, I created it on MainActivity.java

public static List<String> myItems = new ArrayList<>();

Create setOnCheckedChangeListener in YouAdapter.class

holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
            if(b){
                myItems.add(Model.getYouItem());
            }
            else{
                myItems.remove(Model.getYouItem());
            }
        }
    });

Now you can use your myItems list to perform operations.

Answer 2

You can use Model class to get recyclerView checked items. More reference : Android Recyclerview checkbox

Model

public class Model {

    private boolean isSelected;
    private String animal;

    public String getAnimal() {
        return animal;
    }

    public void setAnimal(String animal) {
        this.animal = animal;
    }

    public boolean getSelected() {
        return isSelected;
    }

    public void setSelected(boolean selected) {
        isSelected = selected;
    }
}

Adapter

import android.content.Context;
 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 android.widget.Toast;

 import java.util.ArrayList;


  public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.MyViewHolder> {

private LayoutInflater inflater;
public static ArrayList<Model> imageModelArrayList;
private Context ctx;

public CustomAdapter(Context ctx, ArrayList<Model> imageModelArrayList) {

    inflater = LayoutInflater.from(ctx);
    this.imageModelArrayList = imageModelArrayList;
    this.ctx = ctx;
}

@Override
public CustomAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    View view = inflater.inflate(R.layout.rv_item, parent, false);
    MyViewHolder holder = new MyViewHolder(view);

    return holder;
}

@Override
public void onBindViewHolder(final CustomAdapter.MyViewHolder holder, int position) {

    holder.checkBox.setText("Checkbox " + position);
    holder.checkBox.setChecked(imageModelArrayList.get(position).getSelected());
    holder.tvAnimal.setText(imageModelArrayList.get(position).getAnimal());

   // holder.checkBox.setTag(R.integer.btnplusview, convertView);
    holder.checkBox.setTag(position);
    holder.checkBox.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            Integer pos = (Integer) holder.checkBox.getTag();
            Toast.makeText(ctx, imageModelArrayList.get(pos).getAnimal() + " clicked!", Toast.LENGTH_SHORT).show();

            if (imageModelArrayList.get(pos).getSelected()) {
                imageModelArrayList.get(pos).setSelected(false);
            } else {
                imageModelArrayList.get(pos).setSelected(true);
            }
        }
    });


}

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

class MyViewHolder extends RecyclerView.ViewHolder {

    protected CheckBox checkBox;
    private TextView tvAnimal;

    public MyViewHolder(View itemView) {
        super(itemView);

        checkBox = (CheckBox) itemView.findViewById(R.id.cb);
        tvAnimal = (TextView) itemView.findViewById(R.id.animal);
    }

}

Answer 3

recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getApplicationContext(), recyclerView, new RecyclerTouchListener.ClickListener() {
    @Override
    public void onClick(View view, int position) {
        List list= aList.get(position);
        //Toast.makeText(getApplicationContext(), movie.getTitle() + " is selected!", Toast.LENGTH_SHORT).show();
        action(list.getId());
    }

    @Override
    public void onLongClick(View view, int position) {

    }
}));

Answer 4

first set a boolean value in moodel class

and clicking of checkbox pass boolean true

and checked all check box is clicked or not by following method

 fun isListContainMethod(arraylist: List<Puzzle>): Boolean {
    for (puzzle in arraylist) {
        if (!puzzle.isSelect) {
            return false
        }
    }
    return true
}

Answer 5

One simple solution is to create OnItemCheckLister, and implement it similar to following:

public class MyAdapter extends RecyclerViewAdapter {

    interface OnItemCheckListener {
        void onItemCheck(Item item);
        void onItemUncheck(Item item);
    }

    ...

    @NonNull
    private OnItemCheckListener onItemCheckListener;

    public MyAdapter (List<Item> items, @NonNull OnItemCheckListener onItemCheckListener) {
        this.items = items;
        this.onItemClick = onItemCheckListener;
    }

    ...

    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) {
        if (holder instanceof MyViewHolder) {
            final Item currentItem = items.get(position);

            ...

            ((MyViewHolder) holder).setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    ((MyViewHolder) holder).checkbox.setChecked(
                            !((MyViewHolder) holder).checkbox.isChecked());
                    if (((MyViewHolder) holder).checkbox.isChecked()) {
                        onItemClick.onItemCheck(currentItem);
                    } else {
                        onItemClick.onItemUncheck(currentItem);
                    }
                }
            });
        }
    }

    static class MyViewHolder extends RecyclerView.ViewHolder {
        CheckBox checkbox;
        View itemView;

        ...

        public MyViewHolder(View itemView) {
            super(itemView);
            this.itemView = itemView;
            checkbox = (CheckBox) itemView.findViewById(R.id.checkbox);
            checkbox.setClickable(false);
            ...
        }

        public void setOnClickListener(View.OnClickListener onClickListener) {
            itemView.setOnClickListener(onClickListener);
        }
    }
}

Then in the activity, we can do this:

    private List<Item> currentSelectedItems = new ArrayList<>();

    ...

    myAdapter = new MyAdapter(items, new MyAdapter.OnItemCheckListener() {
            @Override
            public void onItemCheck(Item item) {
                currentSelectedItems.add(item);
            }

            @Override
            public void onItemUncheck(Item item) {
                currentSelectedItems.remove(item);
            }
        });

Then you can do stuff with currentSelectedItems.

Note: Since this solution suppose for the whole Item to be pressed so the checkbox is set to be not clickable.

Answer 6

from @ninjahoahong I add checkbox listenner in onBindViewHolder method and checkbox can click able.

viewHolder.checkBox.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        int pos = viewHolder.getAdapterPosition();
        ChoiceItem currentItem = mChoice.get(pos);
        if(viewHolder.checkBox.isChecked()){
            onItemCheckListener.onItemCheck(currentItem);
            currentItem.setCheck(true);
        }else{
            onItemCheckListener.onItemUncheck(currentItem);
            currentItem.setCheck(false);
        }
    }
});