Firebase Analytics in Flutter - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Firebase Analytics package in Flutter.

Flutter

import '[1]';

Drag options to blanks, or click blank then click option'

Apackage:flutter_analytics/flutter_analytics.dart

Bpackage:flutter/material.dart

Cpackage:firebase_core/firebase_core.dart

Dpackage:firebase_analytics/firebase_analytics.dart

Attempts:

3 left

💡 Hint

Common Mistakes

Importing the wrong package like flutter_analytics or firebase_core instead of firebase_analytics.

The correct import for Firebase Analytics in Flutter is package:firebase_analytics/firebase_analytics.dart.

2fill in blank

medium

Complete the code to create an instance of FirebaseAnalytics.

Flutter

final FirebaseAnalytics analytics = FirebaseAnalytics[1]();

Drag options to blanks, or click blank then click option'

A.new

B.init

C.instance

D.create

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to call a constructor like FirebaseAnalytics() instead of using the instance property.

FirebaseAnalytics uses a singleton pattern accessed via FirebaseAnalytics.instance.

3fill in blank

hard

Fix the error in the code to log a custom event named 'purchase' with a parameter 'item_id'.

Flutter

await analytics.logEvent(name: '[1]', parameters: {'item_id': '12345'});

Drag options to blanks, or click blank then click option'

Apurchase

Bpurchase_event

Cbuy

Ditem_purchase

Attempts:

3 left

💡 Hint

Common Mistakes

Using event names with underscores or spaces which Firebase Analytics does not accept.

The event name should be a simple string like 'purchase' to follow Firebase Analytics naming conventions.

4fill in blank

hard

Fill both blanks to set the user ID and user property in Firebase Analytics.

Flutter

await analytics.setUserId(id: '[1]');
await analytics.setUserProperty(name: '[2]', value: 'premium');

Drag options to blanks, or click blank then click option'

Auser123

Bsubscription

Cuser_type

Did

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid user property names or mixing user ID with property names.

The user ID can be any string like 'user123'. The user property name should be descriptive like 'user_type'.

5fill in blank

hard

Fill all three blanks to log a screen view event with screen name and screen class.

Flutter

await analytics.logScreenView(screenName: '[1]', screenClass: '[2]', [3]);

Drag options to blanks, or click blank then click option'

AscreenClassOverride: 'HomeScreen'

B'HomePage'

C'MainScreen'

DscreenClassOverride: 'MainScreen'

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing parameter names or missing the optional screenClassOverride parameter.

The screenName is 'HomePage', screenClass is 'MainScreen', and the optional parameter is screenClassOverride with value 'MainScreen'.

Practice

1. What is the main purpose of Firebase Analytics in a Flutter app?

easy

A. To create user interface layouts

B. To manage app navigation between screens

C. To track user actions and events within the app

D. To store user data locally on the device

Solution

1. Step 1: Understand Firebase Analytics role

   Firebase Analytics is designed to collect data about user interactions and events in the app.

2. Step 2: Compare options with purpose

   Only To track user actions and events within the app describes tracking user actions, which matches Firebase Analytics' main use.

3. Final Answer:

   To track user actions and events within the app -> Option C

4. Quick Check:

   Firebase Analytics = Track user actions [OK]

Hint: Firebase Analytics tracks events, not UI or storage [OK]

Common Mistakes:

• Confusing analytics with UI design
• Thinking it manages navigation
• Assuming it stores data locally

2. Which is the correct way to log a custom event named 'purchase' with Firebase Analytics in Flutter?

easy

A. logEvent('purchase');

B. FirebaseAnalytics.logEvent('purchase');

C. FirebaseAnalytics.log('purchase');

D. FirebaseAnalytics.instance.logEvent(name: 'purchase');

Solution

1. Step 1: Recall Firebase Analytics method syntax

   The correct method to log events is logEvent with named parameter 'name'.

2. Step 2: Check each option's syntax

   FirebaseAnalytics.instance.logEvent(name: 'purchase'); uses FirebaseAnalytics.instance and calls logEvent(name: 'purchase'), which is correct.

3. Final Answer:

   FirebaseAnalytics.instance.logEvent(name: 'purchase'); -> Option D

4. Quick Check:

   Use logEvent(name: 'eventName') method [OK]

Hint: Use instance and named 'name' parameter for logEvent [OK]

Common Mistakes:

• Calling logEvent without instance
• Missing named parameter 'name'
• Using wrong method names

3. What will happen when this Flutter code runs?

FirebaseAnalytics analytics = FirebaseAnalytics.instance;
await analytics.logEvent(name: 'button_click', parameters: {'button': 'play'});

medium

A. Throws a syntax error due to missing semicolon

B. Logs an event named 'button_click' with parameter 'button' set to 'play'

C. Navigates to a new screen named 'button_click'

D. Stores the parameter locally without sending to Firebase

Solution

1. Step 1: Analyze the code's function call

   The code creates an analytics instance and calls logEvent with name and parameters.

2. Step 2: Understand logEvent behavior

   logEvent sends the event data to Firebase Analytics backend for tracking.

3. Final Answer:

   Logs an event named 'button_click' with parameter 'button' set to 'play' -> Option B

4. Quick Check:

   logEvent sends named event with parameters [OK]

Hint: logEvent sends event data to Firebase, not UI or local storage [OK]

Common Mistakes:

• Thinking it causes navigation
• Assuming it stores data locally only
• Confusing syntax errors

4. Identify the error in this Flutter Firebase Analytics code:

FirebaseAnalytics analytics = FirebaseAnalytics.instance;
analytics.logEvent('login');

medium

A. logEvent requires named parameter 'name', not a positional argument

B. FirebaseAnalytics cannot be instantiated directly

C. logEvent method does not exist

D. Missing await keyword before logEvent

Solution

1. Step 1: Check logEvent method signature

   logEvent requires a named parameter 'name', so passing a positional argument is incorrect.

2. Step 2: Verify other options

   FirebaseAnalytics can be instantiated, logEvent exists, and await is optional but recommended.

3. Final Answer:

   logEvent requires named parameter 'name', not a positional argument -> Option A

4. Quick Check:

   logEvent(name: 'eventName') syntax needed [OK]

Hint: logEvent needs named 'name' parameter, not just a string [OK]

Common Mistakes:

• Passing event name as positional argument
• Forgetting named parameters
• Confusing method existence

5. You want to track when a user completes a level in your game with level number and score. Which is the best way to log this event using Firebase Analytics in Flutter?

hard

A. analytics.logEvent(name: 'level_complete', parameters: {'level': levelNumber, 'score': score});

B. analytics.logEvent('level_complete', {'level': levelNumber, 'score': score});

C. analytics.logEvent(name: 'levelComplete', level: levelNumber, score: score);

D. analytics.logEvent('levelComplete', levelNumber, score);

Solution

1. Step 1: Use correct method signature for logEvent

   logEvent requires a named 'name' parameter and an optional 'parameters' map.

2. Step 2: Check parameter passing style

   analytics.logEvent(name: 'level_complete', parameters: {'level': levelNumber, 'score': score}); correctly uses name and parameters map with keys and values for level and score.

3. Step 3: Identify errors in other options

   Options B, C, and D use incorrect syntax or parameter passing styles.

4. Final Answer:

   analytics.logEvent(name: 'level_complete', parameters: {'level': levelNumber, 'score': score}); -> Option A

5. Quick Check:

   Use named 'name' and 'parameters' map for event data [OK]

Hint: Always use named 'name' and 'parameters' map for event details [OK]

Common Mistakes:

• Passing event name as positional argument
• Not using parameters map
• Incorrect parameter names