14 days of Basic Android (Kotlin)

Learning Android and Kotlin by making app everything.

Guarantee you will learn new skills after your 14 days quarantine time because of COVID-19.

Prerequisite:

• Basic programing skill.
• Basic Kotlin knowledge: https://blog.teamtreehouse.com/absolute-beginners-guide-kotlin
• Basic Object-oriented programming knowledge: Inheritance, Polyphomism etc.
• Patience! This is actually very important since you can't learn new things fast and keep them stick without practicing a lot.

Basic:

Day 0: Hello World

What do you learn?

• Android project Structure.
• Layout the UI widgets in a ConstraintLayout using constraint properties.
• Getting text from an EditText widget, listen to the click event of an Button and display the entered text in a TextView.

How the app looks like?

Additional resources

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Day 1: Layout Explorer

What do you learn?

• Explore some common layout classes in Android:
  • LinearLayout (Vertical)
  • LinearLayout (Horizontal)
  • RelativeLayout
  • ConstraintLayout
  • FrameLayout
  • TableLayout
• Explore the effects of some common properties of the layout classes:
  • layout_height, layout_width: wrap_content, match_parent
  • padding, margin
  • gravity
  • layout_gravity

How the app looks like?

Additional resources

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Day 2: Widget Explorer

What do you learn?

• Explore how to use some common widgets in Android:
  • TextView
  • Button
  • Switch
  • Checkbox
  • RadioButton + RadioGroup
  • ProgressBar
  • Spinner

How the app looks like?

Additional resources

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Day 3: CardView + ScrollView

What do you learn?

• Explore CardView and ScrollView to create a common Android-styled user interface.

How the app looks like?

Additional resources

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Day 4: Application Lifecycle

What do you learn?

• Explore the lifecycle of an Android Application.

How the app looks like?

Additional resources

Day 5: ListView

What do you learn?

• Explore the ListView widget to display a listing of common items, one of the most popular user interface in mobile apps (thinking of Facebook News Feed, Twitter timeline or Instagram feed).

How the app looks like?

Additional resources

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Day 6: RecyclerView + RecyclerAdapter

What do you learn?

• Explore how to use RecyclerView and RecylcerAdapter to optimise device resources to display a long list.

How the app looks like?

Additional resources

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Day 7: Data persistence

What do you learn?

• Explore how to use SharedPreferences to store simple data structures.

How the app looks like?

Additional resources

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Day 8: Android Database

What do you learn?

• Explore how to use SQLite to store more complex data structures and their relationships.

How the app looks like?

Additional resources

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Day 9: Networking

What do you learn?

• Explore how to use pure Kotlin function to fetch remote data and display it in the app.

How the app looks like?

Additional resources

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Day 10: Localization

What do you learn?

How the app looks like?

Additional resources

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Day 11: Fragment

What do you learn?

How the app looks like?

• Conditionally showing the LoginFragment or the ProfileFragment in the MainActivity
• Navigation from the ProfileFragment to LogoutFragment which has a logout button.
• Logged-In state is saved in SharedPreferences after logging in
• After logging out, users are redirected to the LoginFragment again.

Additional resources

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Day 12: Navigation Drawer and Fragment

What do you learn?

How the app looks like?

Additional resources

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Day 13: Pixabay Photo Gallery

What do you learn?

• Navigation Drawer: List, Favorite
• Persistent using SharedPreferences
• Infinite scrolling with RecyclerView & RecyclerAdapter
• Using Volley to make network request.

How the app looks like?

Additional resources

Day 14: Kotlin

What's next:

• 14 days of Android Architecture