Mon. Sep 26th, 2022

The Android checkbox component is a View subclass which is capable of showing checkbox. Being a subclass of View the checkbox component can be used in your Android app’s GUI inside a ViewGroup, or as the content view of an activity. A checkbox is a specific type of two-states button that can be either checked or unchecked.

Activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent" 
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context="androiindians.androindian.MainActivity">

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="@string/tv"
    android:textSize="20sp"
    android:textColor="#234098" 
    android:textAllCaps="true"
    android:textStyle="bold|italic"
    android:id="@+id/tv"
    android:typeface="monospace"
    android:gravity="center"/>

<CheckBox
    android:text="CheckBox"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/checkBox" />
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/tv1"
    android:text="UnChecked"/>

</LinearLayout>

MainActivity.Java

package androiindians.androindian;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    TextView textView;
    CheckBox checkBox;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        checkBox= (CheckBox) findViewById(R.id.checkBox);
        textView= (TextView) findViewById(R.id.tv1);
        checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(isChecked==true){
                    textView.setText("Checked");
                }else{
                    textView.setText("Checked");
                }
            }
        });
    }
}

String.xml

<resources>
    <string name="app_name">Androindian</string>
    <string name="tv">Check Box Example</string>    
</resources>

Compcompound Button:

A button with two states, checked and unchecked. When the button is pressed or clicked, the state changes automatically.

By Rajashekar

I’m (Rajashekar) a core Android developer with complimenting skills as a web developer from India. I cherish taking up complex problems and turning them into beautiful interfaces. My love for decrypting the logic and structure of coding keeps me pushing towards writing elegant and proficient code, whether it is Android, PHP, Flutter or any other platforms. You would find me involved in cuisines, reading, travelling during my leisure hours.

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