Deep links in Android Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an intent filter for a deep link in AndroidManifest.xml.

Android Kotlin

<intent-filter>
    <action android:name="[1]" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />
</intent-filter>

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Aandroid.intent.action.CALL

Bandroid.intent.action.MAIN

Candroid.intent.action.SEND

Dandroid.intent.action.VIEW

Attempts:

3 left

💡 Hint

Common Mistakes

Using MAIN action instead of VIEW.

Forgetting to include BROWSABLE category.

The action android.intent.action.VIEW is used to handle deep links in Android.

2fill in blank

medium

Complete the code to specify the scheme for a deep link in the intent filter.

Android Kotlin

<data android:scheme="[1]" />

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Aftp

Bhttp

Cfile

Dmailto

Attempts:

3 left

💡 Hint

Common Mistakes

Using ftp or mailto which are not common for app deep links.

Confusing file scheme with web URLs.

The http scheme is commonly used for web deep links.

3fill in blank

hard

Fix the error in the Kotlin code to handle the deep link intent in an Activity.

Android Kotlin

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    val intent = [1]
    val data = intent?.data
    if (data != null) {
        // Handle the deep link
    }
}

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Aintent

BgetIntent()

CgetIntent

DgetIntentData()

Attempts:

3 left

💡 Hint

Common Mistakes

Using getIntent() which is Java syntax.

Using a non-existent method getIntentData().

In Kotlin, the current intent is accessed via the intent property, not getIntent().

4fill in blank

hard

Fill both blanks to declare a deep link intent filter with host and path prefix.

Android Kotlin

<intent-filter>
    <action android:name="android.intent.action.VIEW" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />
    <data android:scheme="https" android:host="[1]" android:pathPrefix="[2]" />
</intent-filter>

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Awww.example.com

B/products

Cexample.com

D/home

Attempts:

3 left

💡 Hint

Common Mistakes

Using www in host which can cause mismatch.

Using incorrect path prefix without leading slash.

The host should be the domain without www for consistency, and pathPrefix defines the starting path segment.

5fill in blank

hard

Fill all three blanks to create a Kotlin function that extracts a query parameter named 'id' from a deep link Uri.

Android Kotlin

fun getIdFromDeepLink(intent: Intent): String? {
    val data = intent.data
    return data?.[1]("[2]") ?: [3]
}

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AgetQueryParameter

Bid

Cnull

DgetQuery

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent method like getQuery.

Returning an empty string instead of null.

The Uri method getQueryParameter retrieves the value of a query parameter by name. If the parameter is missing, returning null is appropriate.