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How to use checkbox in Android?
This example demonstrates how do I make a specific text on TextView bold in android.
Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.
Step 2 − Add the following code to res/layout/activity_main.xml.
<?xml version="1.0" encoding="utf-8"?> <android.support.constraint.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="MainActivity"> <CheckBox android:id="@+id/checkBox" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="144dp" android:layout_marginTop="68dp" android:text="Pizza" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> <CheckBox android:id="@+id/checkBox2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="144dp" android:layout_marginTop="28dp" android:text="Coffee" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/checkBox" /> <CheckBox android:id="@+id/checkBox3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="144dp" android:layout_marginTop="28dp" android:text="Burger" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/checkBox2" /> <Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="144dp" android:layout_marginTop="184dp" android:text="Order" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/checkBox3" /> </android.support.constraint.ConstraintLayout>
Step 3 − Add the following code to src/MainActivity.java
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.Toast;
public class MainActivity extends AppCompatActivity {
CheckBox pizza,coffee,burger;
Button buttonOrder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pizza = findViewById(R.id.checkBox);
coffee = findViewById(R.id.checkBox2);
burger = findViewById(R.id.checkBox3);
buttonOrder = findViewById(R.id.button);
buttonOrder.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int totalAmount = 0;
StringBuilder result = new StringBuilder();
result.append("Selected Items");
if (pizza.isChecked()) {
result.append("
Pizza 100Rs");
totalAmount += 100;
}
if (coffee.isChecked()) {
result.append("
Coffe 50Rs");
totalAmount += 50;
}
if (burger.isChecked()) {
result.append("
Burger 120Rs");
totalAmount += 120;
}
result.append("
Total: " + totalAmount + "Rs");
Toast.makeText(getApplicationContext(), result.toString(), Toast.LENGTH_SHORT).show();
}
});
}
}Step 4 - Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample"> <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>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run 
icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen –
Click here to download the project code.
Updated on: 21-Aug-2019
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