Google IO 2017

Vishal Nayak

Contents

Instant Apps

• Introduction• One Codebase• Structure of a Instant App• Implementation requirements• Do’s and Don’ts• Caveats

Introduction

• To get the user engaged with your content and complete a task, not to get

user to install your app

• To increase the discovery of your content through URLs and search results

One Codebase

Structure of an Instant App

Implementation requirements

• Remove unnecessary code and resources from your app.

• Support Android app links

• Refactor app into feature modules

• Implement runtime permissions

• Implement Smart Lock for passwords

• For payments, use Google payments API

• Define entry points for your app

Do’s and Don’ts

• Put sign in when users understand the value of signing in, not at the beginning of

instant app launch

• Allow users to complete a task – don’t prompt for installation just before task completion

• Installation prompting inside the instant app - Explicit and Implicit

• Mobile holdback on play console : define percentage of users that should go to the

mobile web and percentage that gets the instant app

• Use Google analytics for Firebase for tracking

• Don’t create additional splash screens

• Don’t branch your UI - user should be faced with as little re-learning post installation as

possible

• Provide a "share" action within your app that allows users to share your instant app's

URL.

Caveats

• Instant Apps are currently available on devices running

Android 6.0 (API level 23) and higher.

• 4MB download limit for Instant apps (validation occurs when

you upload your instant app to the production track of the

Google Play Console)

• Users can opt out of Instant apps via: Settings > Google >

Instant apps.

Android Omg – What’s new

• Notifications in Android O

• Google Play app signing

• Other new stuff…

Notifications in Android O

Need for change

• People often want only some notifications from an app, but

not all of them

• Many people don’t adjust their settings, even if they know

they can

• When a notification is addressed right away it is easy to

forget later

• Only 2 types of notifications are valued

People to People notifications

Reminders

Notification Channels

• App defines a channel for each type of notification it sends

• User has channel-level notification controls

Notification Model

Notification Priority Levels

Notification Settings

Visual Hierarchy

Snoozing

Google Play App Signing

Current Signing process

If you lose you signing key it cannot be retrieved

Google Play App Signing

Google Play app signing helps developers to secure their app

signing keys

How to?

Generating upload key

Resetting upload key

Contact the Google Play Developer Support via

the Help center

https://support.google.com/googleplay/android-

developer

App Optimizations (Beta)

Derived APKs

Auto multiple APKs

• APKs are smaller

• Can support more devices

• No need to create multiple APKs during development

Testing

Testing (contd..)

Other new stuff…..

Autofill framework in Android O

Annotate XML for Auto fill

Architecture Guide and Components

• Google’s opinion on how

an app architecture

should be built

• Fundamental

Components which help

you build your app

• https://developer.android

.com/topic/libraries/archi

tecture/index.html

Firebase – What’s new

• Firebase Performance Monitoring

• Firebase Analytics – Stream View and Debug View

Firebase Performance Monitoring

Use traces to get performance context

• Using custom traces, you can understand the context in which performance

issues take place, and more easily address them.

• You can also make use of automated traces, like app startup time.

Keep your eyes on network behavior

• Automated monitoring of HTTP/S requests.

• Track response times, success rates, payload sizes and latency.

Pinpoint the origin of issues

Break down both trace and network data into dimensions like app version,

country, device and OS level to get to the bottom of issues.

Automatic traces

• App start traces, which measure the time between when

the user opens the app and when the app is responsive.

• App in background traces, which measure the time

when the app is running in the background.

• App in foreground traces, which measure the time when

the app is running in the foreground and available to the

user.

Firebase Analytics - Stream View

Firebase Analytics - Debug View

References

• Android O Notifications:

https://developer.android.com/preview/features/notification-channels.html

https://developer.android.com/preview/features/notification-badges.html

• Google Play App Signing:

https://support.google.com/googleplay/android-developer/answer/7384423?hl=en

• Auto fill Framework in Android O:

https://developer.android.com/preview/features/autofill.html

• Architecture Components and Guide:

https://developer.android.com/topic/libraries/architecture/guide.html

• Firebase Performance Monitoring, Stream View and Debug View:

https://firebase.google.com/docs/perf-mon/

https://support.google.com/firebase/answer/7229836?hl=en

https://firebase.google.com/docs/analytics/debugview

• Android Instant Apps:

https://developer.android.com/topic/instant-apps/index.html