In this tutorial we will learn How to use Checkbox in Android Using Android Studio.

Generally we use checkboxes when we want to choose from a list of items. For Example we want to give the option to the user to select his/her favorite animal, in this case we can use chackboxs to give those options.

So lets create a project.

Step 1  – Create new Android project

Step 2 – Add three CheckBox in the main activity. Also Add a button to the main activity as shown in the picture below.

Step 3 – Give Android id to checkboxs and button as shown in the activity_main.xml file.

layout/activity_main.xml

<RelativeLayout 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" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"
    android:id="@+id/abc">

    <CheckBox
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Dog"
        android:id="@+id/checkBox_dog"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="46dp"
        android:checked="false" />

    <CheckBox
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Cat"
        android:id="@+id/checkBox_cat"
        android:layout_below="@+id/checkBox_dog"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="34dp"
        android:checked="false" />

    <CheckBox
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Cow"
        android:id="@+id/checkBox_cow"
        android:layout_below="@+id/checkBox_cat"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="39dp"
        android:checked="false" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Select"
        android:id="@+id/button"
        android:layout_centerVertical="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
</RelativeLayout>

 

Step 4 – Finally write the following code in MainActivity.java file

 

com/example/programmingknowledge/thefirstapp/MainActivity.java

package com.example.programmingknowledge.thefirstapp;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.CheckBox;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {
    private CheckBox check1,check2 ,check3;
    private Button button_sel;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        addListenerOnButton();
        addListnerToCheckBox();
    }
    public void addListnerToCheckBox() {
        check1 = (CheckBox)findViewById(R.id.checkBox_dog);
        check1.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if(((CheckBox)v).isChecked()) {
                            Toast.makeText(MainActivity.this,
                                    "Dog is selected",Toast.LENGTH_LONG).show();
                        }
                    }
                }
        );
    }

    public void addListenerOnButton() {
        check1 = (CheckBox)findViewById(R.id.checkBox_dog);
        check2 = (CheckBox)findViewById(R.id.checkBox_cat);
        check3 = (CheckBox)findViewById(R.id.checkBox_cow);
        button_sel = (Button)findViewById(R.id.button);

        button_sel.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        StringBuffer result = new StringBuffer();
                        result.append("Dog : ").append(check1.isChecked());
                        result.append("\nCat : ").append(check2.isChecked());
                        result.append("\nCow : ").append(check3.isChecked());

                        Toast.makeText(MainActivity.this,result.toString(),
                                Toast.LENGTH_LONG).show();
                    }
                }

        );

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

 

OUTPUT: