Activity concept in Android Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a basic Activity class in Kotlin.

Android Kotlin

class MainActivity : [1]() {
  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
  }
}

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AFragment

BAppCompatActivity

CService

DViewModel

Attempts:

3 left

💡 Hint

Common Mistakes

Using Fragment or Service instead of AppCompatActivity.

Forgetting to extend any class.

The MainActivity class must extend AppCompatActivity to be a valid Activity.

2fill in blank

medium

Complete the code to set the layout resource for the Activity.

Android Kotlin

override fun onCreate(savedInstanceState: Bundle?) {
  super.onCreate(savedInstanceState)
  [1](R.layout.activity_main)
}

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AsetContentView

BfindViewById

CsetLayout

Dinflate

Attempts:

3 left

💡 Hint

Common Mistakes

Using inflate or setLayout which are not Activity methods.

Calling findViewById instead of setting the layout.

The method setContentView sets the UI layout for the Activity.

3fill in blank

hard

Fix the error in the Activity lifecycle method override.

Android Kotlin

override fun onStart() {
  super.[1]()
  // Additional code here
}

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AonCreate

BonResume

ConStart

DonPause

Attempts:

3 left

💡 Hint

Common Mistakes

Calling super.onCreate() inside onStart.

Forgetting the super call entirely.

When overriding onStart, call super.onStart() to maintain lifecycle behavior.

4fill in blank

hard

Fill both blanks to start a new Activity from the current one.

Android Kotlin

val intent = Intent(this, [1]::class.java)
[2](intent)

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ASecondActivity

BstartActivity

CMainActivity

Dfinish

Attempts:

3 left

💡 Hint

Common Mistakes

Using finish() instead of startActivity().

Using the wrong Activity class in the Intent.

To start a new Activity, create an Intent with the target Activity class and call startActivity with it.

5fill in blank

hard

Fill all three blanks to pass data to another Activity using Intent extras.

Android Kotlin

val intent = Intent(this, [1]::class.java)
intent.[2]("username", "Alice")
[3](intent)

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ADetailActivity

BputExtra

CstartActivity

DgetExtra

Attempts:

3 left

💡 Hint

Common Mistakes

Using getExtra instead of putExtra.

Forgetting to call startActivity.

Passing wrong Activity class.

Use putExtra to add data to the Intent, then call startActivity to launch the target Activity.