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Rosário P. Fernandes Firebase GDE @_rpfernandes A/B Testing Android apps with Firebase

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Half screen photo slide if text is necessary About Me ● From Mozambique ● Firebase GDE ● Android Developer ● Organizer at GDG Maputo ● Writes technical blog posts ● Open Source Contributor ● Loves video games

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Sign up for free Register for more

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A/B Testing Why is it important?

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Testing changes ● Co-Workers ● Friends ● Family ● Focused testing groups

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Testing changes Make changes periodically? Sign up for free Register for more Register for free Week 1 Week 5 Week 3

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A/B Testing What is it?

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Testing changes A/B groups Sign up for free Register for more Register for free All users Group B Group A

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Firebase Remote Config Simple key-value store that lives in the Cloud. {“key” : “value”}

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// Import the Firebase BoM implementation platform('com.google.firebase:firebase-bom:26.1.0') // When using the BoM, you don't specify versions in Firebase library dependencies // Declare the dependency for the Firebase SDK for Remote Config implementation 'com.google.firebase:firebase-config-ktx' // Declare the dependency for the Firebase SDK for Google Analytics implementation 'com.google.firebase:firebase-analytics-ktx' Add Remote Config to your app

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button_label Sign Up for Free button_color #0000FF // In Kotlin Firebase.remoteConfig.setDefaultsAsync(R.xml.default_values) // fetch values from the server remoteConfig.fetchAndActivate()

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// On our Fragment/Activity val remoteConfig = Firebase.remoteConfig val label: String = remoteConfig.getString(“button_label”) val color: String = remoteConfig.getString(“button_color”) button.setText(label) button.setBackgroundColor(Color.parseColor(color))

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Google Analytics for Firebase Track User Events

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// On our Fragment/Activity button.setOnClickListener { Firebase.analytics.logEvent(“sign_up_started”) { // optional params here } } auth.setOnSignUpFinished { Firebase.analytics.logEvent(“sign_up_finished”) { // optional params here } }

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Creating an Experiment from the Firebase Console

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// Testing our variants // Get the installation token FirebaseInstallations.getInstance().getToken(false) .addOnSuccessListener { task -> if (task.isSuccessful) { Log.d(“ABtest”, “ID: ${task.result!!.token}”) // ijKJddsjasbdjBDJBjdaknsdjN } } // Enable Debug Mode // Dont use this in production val configSettings = remoteConfigSettings { minimumFetchIntervalInSeconds = 0 } Firebase.remoteConfig.setConfigSettingsAsync(configSettings)

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Analyzing Results

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Useful links ● https://firebase.google.com/docs/remote-config/use-config-android ● https://firebase.google.com/docs/ab-testing/abtest-config ● https://firebase.google.com/docs/analytics/get-started?platform=android

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Rosário P. Fernandes Firebase GDE @_rpfernandes Thank You!