Creating a new Android project in Android Kotlin - Publishing Workflow

Build & Publish - Creating a new Android project

Performance Impact

Creating a new Android project itself does not affect app performance. However, the initial project setup influences how smoothly your app runs later. A clean, well-structured project helps maintain 60fps frame rates and efficient memory use. Avoid adding unnecessary libraries or heavy resources at the start to keep battery use low.

Optimization Tips

Start with the default Android Studio project template using Kotlin. Keep your initial code simple and modular. Use Android Jetpack libraries for efficient UI and lifecycle management. Avoid heavy operations on the main thread to maintain smooth UI rendering at 60fps. Use profiling tools in Android Studio early to catch performance issues.

App Size and Startup Time

The initial project is small, usually under 5MB. Avoid adding large assets or many dependencies at the start to keep the app bundle size small. Smaller apps load faster and install quicker. Use Android App Bundles (AAB) to optimize download size for users. Keep startup code minimal to reduce app launch time.

iOS vs Android Differences

Creating a new Android project uses Android Studio and Kotlin or Java. iOS projects use Xcode and Swift or Objective-C. Android apps require an AndroidManifest.xml file; iOS uses Info.plist. Android apps use Gradle for build management; iOS uses Xcode build system. Signing and publishing processes differ between Google Play and Apple App Store.

Store Review Guidelines

• Ensure your app has a unique package name.
• Include a valid app icon and launch screen.
• Follow Google Play policies on content and permissions.
• Sign your app with a release key before publishing.
• Test on multiple devices and Android versions.
• Provide a privacy policy if your app collects user data.

Self-Check Question

Your app takes 5 seconds to load this screen. What's likely wrong?

• Heavy operations running on the main thread during startup.
• Too many or large resources loading at launch.
• Unoptimized or unnecessary libraries included.
• Lack of splash screen or delayed UI rendering.

Key Result

Starting a new Android project with a clean, minimal setup ensures smooth performance, small app size, and easier publishing. Use Android Studio defaults, avoid heavy dependencies early, and follow Google Play guidelines for a successful launch.

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