Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member

Increasing accessibility

From: Android 4.1 SDK Jelly Bean New Features

Video: Increasing accessibility

Accessibility is, or should be, a major concern of every web and app developer. Google has made accessibility a primary focus of Jelly Bean and followed through with built-in tools, APIs, and even a developer center dedicated to the topic. Let's take a look at the system wide accessibility features to start off. For the vision impaired, Android 4.1 includes a screen reader service called TalkBack to describe the results of actions, as well as a companion feature called Explore by Touch that audibly describes the interface as you touch the various elements.

Increasing accessibility

Accessibility is, or should be, a major concern of every web and app developer. Google has made accessibility a primary focus of Jelly Bean and followed through with built-in tools, APIs, and even a developer center dedicated to the topic. Let's take a look at the system wide accessibility features to start off. For the vision impaired, Android 4.1 includes a screen reader service called TalkBack to describe the results of actions, as well as a companion feature called Explore by Touch that audibly describes the interface as you touch the various elements.

To enable it, you will first have to open Settings, that I have here on one of my home screens. So I'll swipe over to that and tap Settings and then I'll scroll down, almost to the bottom, where I see Accessibility, and tap that. Next tap TalkBack right up top. When that opens, tap the ON/OFF switch in the upper right, by default it's set to OFF. That will display a dialog box asking you to confirm your choice. Once you tap OK, TalkBack will kick in. So let's tap OK.

Now every action that I take will be echoed by TalkBack. So if I change my Ringtone volume, [Audio] I'm told of the action and this specifies to what percentage I change it. Let me raise the volume a little bit. [Audio] Now if I want to navigate through the system there are a series of special gestures you can use. To use an icon, I'll need to tap it not once but twice. Let's click the TalkBack settings at the bottom of the page to go to that screen.

I find it's best for most icons and options to highlight it first and then double tap. So I'll tap it once to highlight. [Audio] And you can hear TalkBack read it back, and then again twice. [Audio] Now here is a pretty big list of options. It says there are 16 at all and we're seeing 1 through 9. So how do you see the rest? Well, you can't use a simple swipe up to scroll, that would cause the last item you touched to be read.

To scroll when you're in TalkBack mode, you'll need to use a two finger swipe. [Audio] I want to point out two options in the TalkBack settings. The first is Launch "Explore by touch" tutorial, found almost at the bottom of the screen. We won't go into it, but I recommend that you work your way through it in order to better understand the wide range of gestures used in this mode. Now I do want to go into Developer Settings, however. Let met first highlight it.

[Audio] And now I'll double tap it. [Audio] As you can see, and hear, there are three options here which you can set to trace what's happening in TalkBack mode during a debugging process. First you can set the Log Output Level. If I tap it once. [Audio] And double tap to open. [Audio] You can see all seven levels ranging from NONE to VERBOSE. Let me Cancel it.

[Audio] You can also highlight the event sources in the log to see what's triggering the TalkBack. And finally, you can display the actual speech output in the log. Now if you're following along on your device for the first time, you may be wondering how to get back to the previous screen. Well, you can try double-tap back. That's often a little tricky. Luckily, there's a special gesture for going back a page, and that's swipe down and to the left, just like you're going to the previous page of a book.

[Audio] Let's do that one more time. [Audio] And now I'm going to highlight the ON/OFF switch. [Audio] And then double tap to disable the feature. [Audio] To confirm, I'll highlight OK. [Audio] And then double tap. I mentioned that Google has a great deal of information about accessibility.

You can find that on the developerandroid.com site. There's detailed information about accessibility APIs, how to build an accessibility service, and even a checklist. I think you'll find, like I did, that it's a terrific resource.

Show transcript

This video is part of

Image for Android 4.1 SDK Jelly Bean New Features
Android 4.1 SDK Jelly Bean New Features

26 video lessons · 5538 viewers

Joseph Lowery
Author

 

Start learning today

Get unlimited access to all courses for just $25/month.

Become a member
Sometimes @lynda teaches me how to use a program and sometimes Lynda.com changes my life forever. @JosefShutter
@lynda lynda.com is an absolute life saver when it comes to learning todays software. Definitely recommend it! #higherlearning @Michael_Caraway
@lynda The best thing online! Your database of courses is great! To the mark and very helpful. Thanks! @ru22more
Got to create something yesterday I never thought I could do. #thanks @lynda @Ngventurella
I really do love @lynda as a learning platform. Never stop learning and developing, it’s probably our greatest gift as a species! @soundslikedavid
@lynda just subscribed to lynda.com all I can say its brilliant join now trust me @ButchSamurai
@lynda is an awesome resource. The membership is priceless if you take advantage of it. @diabetic_techie
One of the best decision I made this year. Buy a 1yr subscription to @lynda @cybercaptive
guys lynda.com (@lynda) is the best. So far I’ve learned Java, principles of OO programming, and now learning about MS project @lucasmitchell
Signed back up to @lynda dot com. I’ve missed it!! Proper geeking out right now! #timetolearn #geek @JayGodbold
Share a link to this course

What are exercise files?

Exercise files are the same files the author uses in the course. Save time by downloading the author's files instead of setting up your own files, and learn by following along with the instructor.

Can I take this course without the exercise files?

Yes! If you decide you would like the exercise files later, you can upgrade to a premium account any time.

Become a member Download sample files See plans and pricing

Please wait... please wait ...
Upgrade to get access to exercise files.

Exercise files video

How to use exercise files.

Learn by watching, listening, and doing, Exercise files are the same files the author uses in the course, so you can download them and follow along Premium memberships include access to all exercise files in the library.


Exercise files

Exercise files video

How to use exercise files.

For additional information on downloading and using exercise files, watch our instructional video or read the instructions in the FAQ.

This course includes free exercise files, so you can practice while you watch the course. To access all the exercise files in our library, become a Premium Member.

Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course.


Mark all as unwatched Cancel

Congratulations

You have completed Android 4.1 SDK Jelly Bean New Features.

Return to your organization's learning portal to continue training, or close this page.


OK

Course retiring soon

Android 4.1 SDK Jelly Bean New Features will be retired from the lynda.com library on October 15, 2014. Training videos will no longer be available, but the course will still appear in your course history and certificates of completion.


Become a member to add this course to a playlist

Join today and get unlimited access to the entire library of video courses—and create as many playlists as you like.

Get started

Already a member?

Become a member to like this course.

Join today and get unlimited access to the entire library of video courses.

Get started

Already a member?

Exercise files

Learn by watching, listening, and doing! Exercise files are the same files the author uses in the course, so you can download them and follow along. Exercise files are available with all Premium memberships. Learn more

Get started

Already a Premium member?

Exercise files video

How to use exercise files.

Ask a question

Thanks for contacting us.
You’ll hear from our Customer Service team within 24 hours.

Please enter the text shown below:

The classic layout automatically defaults to the latest Flash Player.

To choose a different player, hold the cursor over your name at the top right of any lynda.com page and choose Site preferencesfrom the dropdown menu.

Continue to classic layout Stay on new layout
Exercise files

Access exercise files from a button right under the course name.

Mark videos as unwatched

Remove icons showing you already watched videos if you want to start over.

Control your viewing experience

Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.

Interactive transcripts

Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.

Are you sure you want to delete this note?

No

Your file was successfully uploaded.

Thanks for signing up.

We’ll send you a confirmation email shortly.


Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

Keep up with news, tips, and latest courses with emails from lynda.com.

Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

   
submit Lightbox submit clicked
Terms and conditions of use

We've updated our terms and conditions (now called terms of service).Go
Review and accept our updated terms of service.