Delete list items using check box in RecyclerView

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Download Source Code:

Step 1:
create new project and open activity_main.xml file and copy the below code

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/cameraContainer"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:orientation="horizontal">

        <CheckBox
            android:id="@+id/chk_select_all"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_weight="1"
            android:text="Select All"
            android:textSize="22dp" />


        <Button
            android:id="@+id/btn_delete_all"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_gravity="right"
            android:layout_margin="10dp"
            android:layout_weight="1"
            android:background="@color/colorPrimary"
            android:paddingLeft="15dp"
            android:paddingRight="15dp"
            android:text="Delete All"
            android:textAllCaps="false"
            android:textColor="#ffffff"
            android:textSize="18dp" />
    </LinearLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scrollbars="none" />

</LinearLayout>

Step 2:
open build.gradle(app) file and sync below libraries

 compile 'com.android.support:cardview-v7:25.1.0'
    compile 'com.android.support:recyclerview-v7:25.1.0'
    compile 'com.android.support:design:25.1.0'

Step 3:
Create Model.java model class and take itemName, and isSelected properties like below.

package com.prasad.selectrecyclerviewitems;

import java.io.Serializable;

public class Model implements Serializable {

    private String itemName;
    private boolean isSelected;

    public Model(String itemName, boolean isSelected) {
        this.itemName = itemName;
        this.isSelected = isSelected;
    }

    public String getItemName() {
        return itemName;
    }

    public void setItemName(String itemName) {
        this.itemName = itemName;
    }

    public boolean isSelected() {
        return isSelected;
    }

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

Step 4:
Open MainActivity.java class file and follow the below code

package com.prasad.selectrecyclerviewitems;

import android.os.Bundle;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    private RecyclerView recyclerView;
    private CheckBox chk_select_all;
    private Button btn_delete_all;

    private ArrayList<Model> item_list = new ArrayList<>();
    private ModelAdapter mAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initControls();
    }

    private void initControls() {


        recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
        chk_select_all = (CheckBox) findViewById(R.id.chk_select_all);
        btn_delete_all = (Button) findViewById(R.id.btn_delete_all);


        item_list.add(new Model("Alpha", false));
        item_list.add(new Model("Beta", false));
        item_list.add(new Model("Cup Cake", false));
        item_list.add(new Model("Donut", false));
        item_list.add(new Model("Eclair", false));
        item_list.add(new Model("Froyo", false));
        item_list.add(new Model("Ginger Bread", false));
        item_list.add(new Model("Honycomb", false));
        item_list.add(new Model("Icecream Sandwhich", false));
        item_list.add(new Model("Jelly Bean", false));
        item_list.add(new Model("Kitkat", false));
        item_list.add(new Model("Lolly Pop", false));
        item_list.add(new Model("Marsh Mallow", false));
        item_list.add(new Model("Nougat", false));


        recyclerView.setHasFixedSize(true);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        mAdapter = new ModelAdapter(item_list);
        recyclerView.setAdapter(mAdapter);

        chk_select_all.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                if (chk_select_all.isChecked()) {

                    for (Model model : item_list) {
                        model.setSelected(true);
                    }
                } else {

                    for (Model model : item_list) {
                        model.setSelected(false);
                    }
                }

                mAdapter.notifyDataSetChanged();
            }
        });

        btn_delete_all.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                if (chk_select_all.isChecked()) {
                    item_list.clear();
                    mAdapter.notifyDataSetChanged();
                    chk_select_all.setChecked(false);
                } else {
                    Snackbar.make(v, "Please click on select all check box, to delete all items.", Snackbar.LENGTH_LONG).show();
                }
            }
        });

    }
}

Step 5:
create a layout file for list item row_item.xml like below

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="75dp"
    android:layout_margin="5dp"
    android:orientation="horizontal"
    card_view:cardCornerRadius="5dp"
    card_view:cardUseCompatPadding="true">


    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:orientation="horizontal">

            <CheckBox
                android:id="@+id/chk_selected"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="10dp" />

            <TextView
                android:id="@+id/txt_Name"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_toLeftOf="@+id/chk_selected"
                android:layout_weight="1"
                android:padding="10dp"
                android:text="Item Name"
                android:textColor="@color/black"
                android:textSize="16dp" />


            <ImageButton
                android:id="@+id/btn_delete_unit"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="10dp"
                android:background="@null"
                android:src="@drawable/ic_clear_black_24dp" />


        </LinearLayout>


    </RelativeLayout>


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

Step 6:
create ModelAdapter.java file copy the below code

package com.prasad.selectrecyclerviewitems;

import android.app.AlertDialog;
import android.content.DialogInterface;
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.ImageButton;
import android.widget.TextView;

import java.util.ArrayList;



public class ModelAdapter extends RecyclerView.Adapter<ModelAdapter.ViewHolder> {


    public ArrayList<Model> item_list;


    public ModelAdapter(ArrayList<Model> arrayList) {

        item_list = arrayList;
    }

    @Override
    public ModelAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        // create a new view
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_item, null);

        // create ViewHolder
        ViewHolder viewHolder = new ViewHolder(view);

        return viewHolder;
    }

    @Override
    public void onBindViewHolder(ModelAdapter.ViewHolder holder, int position) {

        final int pos = position;

        holder.item_name.setText(item_list.get(position).getItemName());

        holder.chkSelected.setChecked(item_list.get(position).isSelected());

        holder.chkSelected.setTag(item_list.get(position));

        holder.chkSelected.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                CheckBox cb = (CheckBox) v;
                Model model = (Model) cb.getTag();

                model.setSelected(cb.isChecked());
                item_list.get(pos).setSelected(cb.isChecked());

            }
        });

        holder.btn_delete.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {

                deleteItemFromList(v, pos);


            }
        });

    }

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


    // confirmation dialog box to delete an unit
    private void deleteItemFromList(View v, final int position) {

        AlertDialog.Builder builder = new AlertDialog.Builder(v.getContext());

        //builder.setTitle("Dlete ");
        builder.setMessage("Delete Item ?")
                .setCancelable(false)
                .setPositiveButton("CONFIRM",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int id) {

                                item_list.remove(position);
                                notifyDataSetChanged();


                            }
                        })
                .setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {


                    }
                });

        builder.show();

    }


    public static class ViewHolder extends RecyclerView.ViewHolder {

        public TextView item_name;
        public ImageButton btn_delete;
        public CheckBox chkSelected;


        public ViewHolder(View itemLayoutView) {
            super(itemLayoutView);

            item_name = (TextView) itemLayoutView.findViewById(R.id.txt_Name);
            btn_delete = (ImageButton) itemLayoutView.findViewById(R.id.btn_delete_unit);
            chkSelected = (CheckBox) itemLayoutView.findViewById(R.id.chk_selected);

        }
    }
}