Android CheckBox

simple example of using a CheckBox in an Android app. In this example, a CheckBox Checked data show in TextView:

Here is the tutorial for Kotlin

There Are Some Common Attributes for CheckBox

Step 1 :

File open res/layout/activity_main.xml file −

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


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:layout_margin="20dp"
        android:orientation="vertical">


        <CheckBox
            android:id="@+id/checkBox1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Mango" />

        <CheckBox
            android:id="@+id/checkBox2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Banana" />

        <CheckBox
            android:id="@+id/checkBox3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Orange" />

        <Button
            android:id="@+id/buttonSubmit"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Submit" />

        <TextView
            android:id="@+id/textResult"
            android:layout_width="match_parent"
            android:gravity="center"
            android:textSize="20dp"
            android:layout_marginTop="20dp"
            android:layout_height="wrap_content"
            android:text="Show Result" />
    </LinearLayout>



</RelativeLayout>

Step 2 :

File open com.microappvalley.newtestproject/MainActivity.java file −

package com.microappvalley.newtestproject;

import androidx.appcompat.app.AppCompatActivity;

import android.annotation.SuppressLint;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity {
 Button buttonSubmit;
 CheckBox checkBox1;
 CheckBox checkBox2;
 CheckBox checkBox3;
 TextView textResult;
 ImageButton imageButton;
    @SuppressLint("MissingInflatedId")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        buttonSubmit=(Button) findViewById(R.id.buttonSubmit);
        checkBox1=(CheckBox) findViewById(R.id.checkBox1);
        checkBox2=(CheckBox) findViewById(R.id.checkBox2);
        checkBox3=(CheckBox) findViewById(R.id.checkBox3);
        checkBox3=(CheckBox) findViewById(R.id.checkBox3);
        textResult=(TextView) findViewById(R.id.textResult);


        buttonSubmit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String checkdData="";
                if (checkBox1.isChecked())
                {
                    checkdData=checkdData +  checkBox1.getText().toString()+"\n";
                }


                if (checkBox2.isChecked())
                {
                    checkdData=checkdData +  checkBox2.getText().toString()+"\n";
                }


                if (checkBox3.isChecked())
                {
                    checkdData=checkdData +  checkBox2.getText().toString()+"\n";
                }

                textResult.setText(checkdData);
                Toast.makeText(MainActivity.this, checkdData, Toast.LENGTH_SHORT).show();
            }
        });
    }
}

Open Device Manager, run the emulator, and  then run the application. Next, check the working output and check the output  you declared in your code.