M1 MAD Canteen Question

Program Overview:

This Android application simulates the process of ordering food from a canteen, where the user can select different food items and beverages, choose a dining option (Dine-In or Take Away), and calculate the total bill. Additionally, the app includes a feedback button that redirects users to a website for reviews.

Layout Design:

The layout consists of several components to facilitate user interaction:

1. TextViews:

   • The first TextView displays the title (“MPSTME Canteen”).
   • The second TextView provides a subtitle (“Today’s Breakfast Menu”).

2. RadioGroup:

   • Contains two RadioButton options (“Dine IN” and “Take Away”), allowing the user to select their preferred dining option.

3. CheckBoxes:

   • For selecting food and beverages, including Tea, Coffee, Poha/Upma, Idli/Dosa, and Sandwich. The prices for these items are displayed alongside the options.

4. Buttons:

   • A “Bill” button calculates the total based on selected items and dining option.
   • A “Feedback” button redirects to a restaurant review site.

Code Breakdown:

activity_main.xml:

This XML file defines the user interface components:

• RadioGroup: Handles the dine-in or take-away option.
• CheckBoxes: Represent food and beverage items with associated prices.
• Buttons: “Bill” for calculating the total and “Feedback” for opening a feedback page.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp"
    android:gravity="center"
    tools:context=".MainActivity">
 
    <!-- Title TextView -->
    <TextView android:id="@+id/title" android:layout_width="wrap_content" android:layout_height="wrap_content" 
        android:text="MPSTME Canteen" android:textSize="24sp" android:textStyle="bold" android:gravity="center" 
        android:layout_marginBottom="10dp"/>
 
    <!-- Subtitle TextView -->
    <TextView android:id="@+id/subtitle" android:layout_width="wrap_content" android:layout_height="wrap_content" 
        android:text="Today's Breakfast Menu" android:textSize="18sp" android:layout_marginBottom="10dp"/>
 
    <!-- Dine-in / Take-away RadioGroup -->
    <RadioGroup android:id="@+id/dineOption" android:layout_width="wrap_content" android:layout_height="wrap_content" 
        android:orientation="horizontal" android:layout_marginBottom="10dp">
        <RadioButton android:id="@+id/dineIn" android:text="Dine IN" android:checked="true"/>
        <RadioButton android:id="@+id/takeAway" android:text="Take Away"/>
    </RadioGroup>
 
    <!-- Food and beverage checkboxes -->
    <CheckBox android:id="@+id/tea" android:text="Tea (Rs20)"/>
    <CheckBox android:id="@+id/coffee" android:text="Coffee (Rs20)"/>
    <CheckBox android:id="@+id/pohaUpma" android:text="Poha/Upma (Rs40)"/>
    <CheckBox android:id="@+id/idliDosa" android:text="Idli/Dosa (Rs60)"/>
    <CheckBox android:id="@+id/sandwich" android:text="Sandwich (Rs100)"/>
 
    <!-- Buttons -->
    <Button android:id="@+id/billButton" android:text="Bill" android:onClick="calculateBill"/>
    <Button android:id="@+id/feedbackButton" android:text="Feedback" android:onClick="openFeedback"/>
</LinearLayout>

MainActivity.java:

The logic for calculating the bill and opening the feedback link is handled in this file.

• Bill Calculation: Based on the checkboxes and radio button selection, the total bill is calculated. If the “Take Away” option is selected, an additional charge is added to the total.

public class MainActivity extends AppCompatActivity {
    private CheckBox tea, coffee, pohaUpma, idliDosa, sandwich;
    private RadioGroup dineOption;
    private RadioButton takeAway;
    private Button billButton, feedbackButton;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // Get Declared elements from the activity sheet just like you do in java script
        tea = findViewById(R.id.tea);
        coffee = findViewById(R.id.coffee);
        pohaUpma = findViewById(R.id.pohaUpma);
        idliDosa = findViewById(R.id.idliDosa);
        sandwich = findViewById(R.id.sandwich);
 
        dineOption = findViewById(R.id.dineOption);
        takeAway = findViewById(R.id.takeAway);
        billButton = findViewById(R.id.billButton);
        feedbackButton = findViewById(R.id.feedbackButton);
    }
 
    public void calculateBill(View view) {
        int total = 0;
        // Since tea is an checkbox object it has a isChecked method.
        // Expected Return of method isChecked = Boolean
        // Add the values as per requirement
 
 
        if (tea.isChecked()) total += 20;
        if (coffee.isChecked()) total += 20;
        if (pohaUpma.isChecked()) total += 40;
        if (idliDosa.isChecked()) total += 60;
        if (sandwich.isChecked()) total += 100;
 
        if (takeAway.isChecked()) {
            total += 20;
        }
		// I dont know if toast is taught but this is chat gpt'd code as i didnt have this question.
        Toast.makeText(this, "Total Bill: ₹" + total, Toast.LENGTH_LONG).show();
    }
 
    public void openFeedback(View view) {
	  - // parse uri to access server??
        Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://restaurant-guru.in/GR-Jani-Canteen-Mumbai"));
        startActivity(browserIntent);
    }
}

AndroidManifest.xml:

This configuration file ensures the app has internet permissions for accessing the feedback page.

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <uses-permission android:name="android.permission.INTERNET"/>
    <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name">
        <activity android:name=".MainActivity" android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

Output:

• After Clicking Bill (Dine In): The total bill is calculated based on selected items, and a message displays the total.
• After Clicking Bill (Take Away): If “Take Away” is selected, a ₹20 additional charge is added to the bill.
• After Clicking Feedback: Redirects the user to a restaurant review page for providing feedback.

Conclusion:

This app efficiently handles food order selection, bill calculation, and provides a convenient way for users to give feedback via an external link.

References

Information

• date: 2025.02.04
• time: 20:41