Android Studio – Android Checkbox Example




Android Tutorial
Android Tutorial

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.

Android Checkbox Activity Design
Android Checkbox Activity Design

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:

Android Tutorial for Beginners - Android Checkbox Basics With Example
Android Tutorial for Beginners – Android Checkbox Basics With Example

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