android studio checkbox checked listener programmatically

 android studio checkbox checked listener programmatically

1.MainActivity.java:

package com.akash.popupwindow.Checkbox;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;

import android.os.Bundle;

import android.widget.CheckBox;

import android.widget.CompoundButton;

import com.akash.popupwindow.MainActivity;

import com.akash.popupwindow.R;

public class MainActivity extends AppCompatActivity {

CheckBox chktrue,chktfalse;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_checkbox__example);

        chktrue=(CheckBox)findViewById(R.id.chktrue);

        chktfalse=(CheckBox)findViewById(R.id.chktfalse);

        chktrue.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

     @Override

   public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {

         if(isChecked==true){

             chktfalse.setChecked(false);

         }else{

             chktfalse.setChecked(true);

         }

      }

       }

        );

    }

}

2.activity_checkbox__example.xml:

<?xml version="1.0" encoding="utf-8"?>

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".Checkbox.Checkbox_Example">

    <CheckBox

        android:id="@+id/chktrue"

        android:layout_width="100dp"

        android:layout_height="80dp"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        tools:layout_editor_absoluteY="268dp"

        android:text="true"/>

    <CheckBox

        android:id="@+id/chktfalse"

        android:layout_width="100dp"

        android:layout_height="80dp"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        tools:layout_editor_absoluteY="400dp"

        android:text="false"/>

</androidx.constraintlayout.widget.ConstraintLayout>

3.AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.akash.popupwindow">

    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:roundIcon="@mipmap/ic_launcher_round"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

   

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

4.strings.xml:

<resources>

    <string name="app_name">Check Box </string>

</resources>

5.colors.xml:

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <color name="colorPrimary">#6200EE</color>

    <color name="colorPrimaryDark">#3700B3</color>

    <color name="colorAccent">#03DAC5</color>

</resources>

6.styles.xml:

<resources>

    <!-- Base application theme. -->

    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

        <!-- Customize your theme here. -->

        <item name="colorPrimary">@color/colorPrimary</item>

        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>

        <item name="colorAccent">@color/colorAccent</item>

    </style>

</resources>