On the Android platform, TalkBack varies by Android version. Both the supported view elements and user interface varies between Android versions. The user may need to download TalkBack from Google Play for earlier Android devices. TalkBack for Android 4.1 and later uses gestures similar to iOS VoiceOver.
On the iOS platform, VoiceOver is available on iOS 3.x and later.
To support both spoken feedback assistants, all Titanium view elements support a set of accessibility properties (see table below), which can be used to specify the text spoken back for the UI element. Many of these view elements have a default value based on the control type and may already be accessible to visually-impaired users. Setting these properties may not be necessary for your application. If you have non-textual elements in your application, that is, you are providing information in a graphical way, such as a star-rating system, you need to explicitly set these properties with helpful hints, labels, and values, so they can convey the same information and be accessible.
TalkBack varies by the Android version. The following directions are for Android 4.1 and later.
To enable TalkBack:
- Open Settings on the device.
- Click Accessibility, then TalkBack.
- Click the TalkBack switch to on to enable TalkBack.
- A dialog box appears asking you to confirm your selection. Click the OK button.