Passing data between activities in Android Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create an Intent to start SecondActivity.

Android Kotlin

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

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ASecondActivity

BMainActivity

CAppCompatActivity

DIntent

Attempts:

3 left

💡 Hint

Common Mistakes

Using the current activity class instead of the target activity.

Forgetting to add ::class.java after the activity name.

You create an Intent specifying the current context and the target activity class. Here, SecondActivity is the destination.

2fill in blank

medium

Complete the code to put a string extra named "username" into the Intent.

Android Kotlin

intent.putExtra("username", [1])

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A"userName"

Busername

CuserName

Duser_name

Attempts:

3 left

💡 Hint

Common Mistakes

Putting quotes around the variable name, which sends the literal text instead of the variable's value.

Using the key name instead of the variable.

The second argument to putExtra is the variable holding the string value you want to send. Here, userName is the variable.

3fill in blank

hard

Fix the error in retrieving the string extra named "username" from the Intent.

Android Kotlin

val user = intent.[1]("username")

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AgetExtra

BgetExtraString

CgetString

DgetStringExtra

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method that does not exist like getExtraString.

Using getString which is not a method of Intent.

To get a string extra from an Intent, use getStringExtra with the key name.

4fill in blank

hard

Fill both blanks to safely retrieve an integer extra named "age" with a default value of 0.

Android Kotlin

val age = intent.[1]("age", [2])

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AgetIntExtra

BgetExtraInt

C0

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong method name like getExtraInt.

Forgetting to provide a default value.

Use getIntExtra with the key and a default value to safely get an integer extra.

5fill in blank

hard

Fill all three blanks to create an Intent, put a boolean extra "isAdmin", and start the activity.

Android Kotlin

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

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AAdminActivity

BputExtra

Ctrue

DMainActivity

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong activity class.

Using a wrong method name instead of putExtra.

Passing the string "true" instead of the boolean true.

Create an Intent for AdminActivity, add a boolean extra with putExtra, and start the activity.