Accesibilidad para apps móviles

How to improve accessibility in your Android apps?

If you've ever been frustrated trying to read tiny print on your mobile screen, you're not alone. Accessibility is a crucial factor in the design of mobile applications, affecting users with visual limitations, movement, and more. In this guide, you will discover practical tips to make your Android applications accessible to everyone. These recommendations will not only improve the user experience but also expand your audience.

What is TalkBack and how does it work?

TalkBack is the screen reader tool built into Android devices. Its main function is to provide verbal feedback on screen elements, allowing users to navigate and interact without having to see them.

• TalkBack provides descriptions of each screen element.
• It allows switching between objects using touch gestures.
• Facilitates the execution of actions by providing clear auditory feedback.

How to optimize contrast in your app?

Contrast is essential for readability. A design with good contrast ensures that text is visible, even for visually impaired users.

• Use opposing colors: A white background with black text is a classic example of good contrast.
• Avoid busy backgrounds: A simple background highlights text and important elements.
• Clearly distinguish action items, such as buttons and links, from purely visual elements.

Why is font size important and how to set it?

Fonts should be scalable to suit the needs of each user. Android recommends the use of "SP" (Scale-independent Pixels) for most text, allowing fonts to scale according to the user's settings.

• SPs scale relative to user preferences, improving readability.
• Make sure all text in the application is measured in SP to make it adaptive.

How much should the click area measure?

The click area is crucial for interaction, especially on touch devices where fingers are used instead of a precise cursor.

• The minimum recommended size is 48x48 dp.
• If an element is smaller, adding padding can ensure that it complies with the appropriate size.

How to use the Accessibility Scanner tool?

The Accessibility Scanner application evaluates the accessibility of your applications and suggests improvements.

• It analyzes screens and elements, pointing out aspects such as inadequate labels or insufficient click areas.
• It gives suggestions on contrast and duplicated elements.
• Recommended for use in examining both applications under development and published applications.

What are labels and Content Description and how to use them?

Labels are texts that describe interactive elements such as buttons. They are used by screen readers such as TalkBack to provide accurate information to users.

• Use Content Description for images and non-textual elements, indicating their function or meaning.
• You can define descriptions in XML or use Jetpack Compose to add relevant textual information.

With these tips, you can start transforming the user experience in your Android apps, making them more inclusive and comfortable for everyone. Remember to test the accessibility of any app, not just the ones you are developing, to acquire best practices. In addition, testing with the Accessibility Scanner app will give you valuable insights on how to continuously improve your projects.