Experience Sharing on Developing an Accessible App

Presented by: Alvis Ko

http://www.linkedin.com/in/alvisko

HKU News Mobile App

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HKU News An extension of HKU Website

The hub of HKU News, Press Releases and Invitations

Already in the market before the Web AccessibilityRecognition SchemeBegan

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One Single Sourcefor Multiple Media

Website EmailMobile App

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Our Target: Gold Award

HKU Website already received the Gold Award last year.

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The Challenge is:Being the first mover

What’s app accessibility exactly?

Who has the skill and experience?

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__________

__________ __________

The essential elements

SupportiveManagement

Have the awareness & support the

initiative

Collaborative Team

App Owner +

Content Owner +

Developer

OGCIO’s Help

Assessment and consultation

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Implementation Initial

Assessment

Development & Test

OGCIO Assessment

Refine

OGCIO Re-assessment

Done!

2 months 2 months

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Major Changes

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Major Changes

Color Contrast Text Size Switcher

Control / Content Sequence Meaningful Alt Text

Buttons Accessibility Contact Page

Correct tags

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Color Contrast

17.9:1

7.2:1

13.9:1

5.4:1

10.2:1

9.3:1

6.7:1

12.2:1

Contrast ratio between

text and its background is at least 4.5:1

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Control / Content Sequence

From Left to Right

From Top to Down

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Buttons

Buttons should indicated as button

Read in meaningfuldescription

“Enlarge fonts Size”

“Go to Next

Article”

“Back to News Listing"

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Correct Tag

Add Language tag toindicate the text is in Chinese.

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Text Size Switcher

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Meaningful Alt Text

Alt Text: “The four Residential Colleges (from left to right): Shun Hing College, Chi Sun College, Lap-Chee College, New

College”

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Accessibility Contact Page

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How to Test?

Color Check

Code Check

Human Test with iOS’s Voice Over Features

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A Few Advices

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Develop Native App

Sometimes hybrid/html5 app cannot read correctly during voice over when there is dynamic content

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2 Firstly, open your eyesFinally, close your eyes

Understand how VIP see the world Perform testing like a VIP

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Google is your friend

Youtube too! Watch video for demo the gesture for voice over

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You may need to update historical content

Beware the schedule

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Reserve extra buffer time for testing & issue fixing

Unless you 100% know what to do

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Thank You! Enjoy!

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