Testing is a crucial part of creating an accessible app, as it can uncover problems with user interaction that you might not otherwise have spotted.
Testing your app's accessibility features typically involves:
Using your app with audible feedback enabled:
Audible accessibility services provide audio prompts that dictate the on screen content to your users as they move around your UI. The most effective way of testing the experience you're providing to users with visual impairments is to enable an audible accessibility service on your Android device and then interact with your app using sound alone.
For Android users, feedback is typically provided via the TalkBack accessibility service. TalkBack comes preinstalled on many Android devices (open your device's Settings and select Accessibility, followed by TalkBack) but you can also download TalkBack for free from Google Play.
Once you've enabled an audible accessibility service, spend some time...