Location services in Android Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the LocationManager system service.

Android Kotlin

val locationManager = getSystemService([1]) as LocationManager

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ALOCATION_SERVICE

BLOCATION_MANAGER

CLOCATION_PROVIDER

DLOCATION_CLIENT

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect constants like LOCATION_MANAGER or LOCATION_PROVIDER.

Trying to cast to the wrong type.

The constant LOCATION_SERVICE is used to get the LocationManager system service in Android.

2fill in blank

medium

Complete the code to request location updates from the GPS provider.

Android Kotlin

locationManager.requestLocationUpdates([1], 1000L, 1f, locationListener)

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ALocationManager.NETWORK_PROVIDER

BLocationManager.GPS_PROVIDER

CLocationManager.PASSIVE_PROVIDER

DLocationManager.FUSED_PROVIDER

Attempts:

3 left

💡 Hint

Common Mistakes

Using NETWORK_PROVIDER when GPS location is needed.

Using a provider that does not exist like FUSED_PROVIDER.

The GPS_PROVIDER is used to get location updates from the GPS hardware.

3fill in blank

hard

Fix the error in the permission check for location access.

Android Kotlin

if (ContextCompat.checkSelfPermission(this, [1]) != PackageManager.PERMISSION_GRANTED) {
    // Request permission
}

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AManifest.permission.INTERNET

BManifest.permission.ACCESS_WIFI_STATE

CManifest.permission.ACCESS_COARSE_LOCATION

DManifest.permission.ACCESS_NETWORK_STATE

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for unrelated permissions like INTERNET or WIFI_STATE.

Forgetting to check permissions before accessing location.

To check location permission, use ACCESS_COARSE_LOCATION or ACCESS_FINE_LOCATION. Here, ACCESS_COARSE_LOCATION is correct.

4fill in blank

hard

Fill both blanks to create a LocationListener that logs location changes.

Android Kotlin

val locationListener = object : LocationListener {
    override fun onLocationChanged(location: [1]) {
        Log.d("Location", "Lat: " + location.[2])
    }
}

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ALocation

Blatitude

Clongitude

DLocationProvider

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong parameter types like LocationProvider.

Accessing longitude instead of latitude when asked for latitude.

The onLocationChanged method receives a Location object. To get latitude, use the latitude property.

5fill in blank

hard

Fill all three blanks to create a location request with balanced power accuracy and interval.

Android Kotlin

val locationRequest = LocationRequest.create().apply {
    priority = [1]
    interval = [2]
    fastestInterval = [3]
}

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ALocationRequest.PRIORITY_BALANCED_POWER_ACCURACY

B10000L

C5000L

DLocationRequest.PRIORITY_HIGH_ACCURACY

Attempts:

3 left

💡 Hint

Common Mistakes

Using PRIORITY_HIGH_ACCURACY when balanced power is requested.

Mixing up interval and fastestInterval values.

Use PRIORITY_BALANCED_POWER_ACCURACY for balanced power use. Set interval to 10000 milliseconds and fastestInterval to 5000 milliseconds.