Creating a new Android project in Android Kotlin - Quick Revision & Summary

Recall & Review

beginner

What is the first step to create a new Android project in Android Studio?

Open Android Studio and select "New Project" from the welcome screen or the File menu.

beginner

Which file defines the app's name, icon, and theme during project creation?

The AndroidManifest.xml file defines app details like the app name and icon, while the app-level build.gradle file manages dependencies and build configurations. The project wizard lets you set the app name and icon initially.

beginner

What is the purpose of choosing a "Project Template" when creating a new Android project?

A project template provides a starting point with pre-built code and UI components, like a basic activity or empty activity, to help you begin faster.

beginner

Why do you need to select a "Minimum SDK" when creating a new Android project?

The Minimum SDK sets the oldest Android version your app supports, ensuring it runs on devices with that version or newer.

beginner

What files are automatically created when you start a new Android project with an Empty Activity template?

Android Studio creates MainActivity.kt, activity_main.xml layout, AndroidManifest.xml, and Gradle build files to get you started.

What do you click first to start a new Android project in Android Studio?

A "Import Project"

B "Open Existing Project"

C "New Project"

D "Settings"

You start by clicking "New Project" to create a fresh Android app.

Which template is best for starting with a blank screen?

A Empty Activity

B Basic Activity

C Fullscreen Activity

D Navigation Drawer Activity

Empty Activity gives you a blank screen to build your app from scratch.

What does the Minimum SDK setting control?

A The oldest Android version your app supports

B The maximum Android version your app supports

C The Android version used to build the app

D The Android version for testing only

Minimum SDK defines the oldest Android version that can run your app.

Which file contains the main UI layout for your activity?

A MainActivity.kt

B activity_main.xml

C AndroidManifest.xml

D build.gradle

activity_main.xml holds the UI design for the main screen.

What language is used by default for new Android projects in Android Studio?

A Swift

B Java

C C++

D Kotlin

Kotlin is the recommended and default language for Android development.

Describe the steps to create a new Android project in Android Studio.

Think about what you see on the Android Studio welcome screen.

Explain why choosing the Minimum SDK is important when creating a new Android project.

Consider device versions and app features.

Practice

1. What is the first step when creating a new Android project in Android Studio?

easy

A. Create a new Java file manually

B. Write Kotlin code directly without any setup

C. Download an app from the Play Store

D. Open Android Studio and select 'New Project' from the welcome screen

Solution

1. Step 1: Open Android Studio

   You start by launching Android Studio, the official tool for Android development.

2. Step 2: Select 'New Project'

   From the welcome screen, you choose 'New Project' to begin setting up your app.

3. Final Answer:

   Open Android Studio and select 'New Project' from the welcome screen -> Option D

4. Quick Check:

   First step = Open Android Studio and start new project [OK]

Hint: Always start by opening Android Studio and choosing 'New Project' [OK]

Common Mistakes:

• Trying to write code before creating a project
• Skipping Android Studio and using other tools
• Downloading apps instead of creating one

2. Which language should you select when creating a new Android project to use Kotlin?

easy

A. Kotlin

B. Java

C. C++

D. Python

Solution

1. Step 1: Choose the programming language option

   During project setup, Android Studio asks which language to use for your app.

2. Step 2: Select Kotlin for modern Android development

   Kotlin is the recommended language for Android apps, so you pick Kotlin here.

3. Final Answer:

   Kotlin -> Option A

4. Quick Check:

   Language choice = Kotlin [OK]

Hint: Pick Kotlin language option to write Android apps [OK]

Common Mistakes:

• Choosing Java instead of Kotlin
• Selecting unsupported languages like Python
• Not selecting any language

3. After creating a new Android project with an Empty Activity template, what will the default screen show when you run the app?

medium

A. A screen showing a list of items

B. A screen showing 'Hello World!' text with no buttons

C. A screen with a button labeled 'Click Me'

D. An error message saying 'No layout found'

Solution

1. Step 1: Understand the Empty Activity template

   This template creates a simple app with minimal UI: a single TextView displaying 'Hello World!' by default.

2. Step 2: Run the app to see the default UI

   When you run the app, it shows 'Hello World!' text on screen with no buttons.

3. Final Answer:

   A screen showing 'Hello World!' text with no buttons -> Option B

4. Quick Check:

   Empty Activity default UI = 'Hello World!' screen [OK]

Hint: Empty Activity shows 'Hello World!' text initially [OK]

Common Mistakes:

• Expecting buttons or lists by default
• Thinking the app shows a list automatically
• Confusing error messages with default UI

4. You created a new Android project but the app crashes on launch with an 'ActivityNotFoundException'. What is the most likely cause?

medium

A. You forgot to select Kotlin as the language during project creation

B. You did not connect a physical device

C. You did not set a launcher activity in the manifest

D. You used an unsupported Android Studio version

Solution

1. Step 1: Understand the error meaning

   'ActivityNotFoundException' often means the app can't find the starting point (launcher activity).

2. Step 2: Check AndroidManifest.xml for launcher activity

   If no launcher activity is set, the app crashes because it doesn't know which screen to show first.

3. Final Answer:

   You did not set a launcher activity in the manifest -> Option C

4. Quick Check:

   Missing launcher activity = crash [OK]

Hint: Always set launcher activity in manifest to avoid launch crashes [OK]

Common Mistakes:

• Assuming language choice causes this error
• Blaming Android Studio version without checking manifest
• Thinking device connection causes activity errors

5. You want to create a new Android project that uses Kotlin and includes a basic UI with a button and text. Which template should you select during project creation?

hard

A. Basic Activity

B. Empty Activity

C. No Activity

D. Fullscreen Activity

Solution

1. Step 1: Review available templates

   Empty Activity gives a 'Hello World!' screen; Basic Activity includes a button (FAB) and text by default.

2. Step 2: Choose Basic Activity for UI elements

   Basic Activity template sets up a screen with a button and text, ready for interaction.

3. Final Answer:

   Basic Activity -> Option A

4. Quick Check:

   UI with button = Basic Activity [OK]

Hint: Pick Basic Activity for ready-made button and text UI [OK]

Common Mistakes:

• Choosing Empty Activity expecting UI elements
• Selecting No Activity which has no UI
• Using Fullscreen Activity which is for immersive apps