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TalkBack Accessibility Support ​

Starting from version 2.6.6, the ComPDF Android PDF viewer supports TalkBack accessibility. When TalkBack is enabled, people can use the system screen reader to identify key UI elements in the viewer and receive spoken feedback and focus guidance during core reading interactions.

Supported Versions ​

  • ComPDF Android PDF SDK 2.6.6 and later.
  • Applies to viewer scenarios that integrate CPDFReaderView.

Support Scope ​

TalkBack support is primarily designed for key interactive elements in the viewer, such as toolbar buttons, navigation entries, and common action controls, helping people complete core reading operations through focus movement and spoken feedback.

Actual spoken content and interaction behavior may vary depending on:

  • The Android system version.
  • How the host app customizes the viewer UI.
  • The current page state, and whether related features such as search, bookmarks, or outlines are enabled.

If your app wraps the viewer with custom containers, toolbars, or business-specific buttons, verify the accessibility attributes of those host UI elements as well so the overall interaction flow remains accessible.

Validate TalkBack Support ​

  1. Enable TalkBack on an Android device.
  2. Integrate ComPDF Android PDF SDK 2.6.6 or later, and open a PDF document with CPDFReaderView.
  3. Move focus by swiping left or right, and check whether key controls in the viewer can be focused and announced correctly.
  4. Double-tap focused controls and verify that interaction feedback works as expected in the core reading flow.

Integration Guidance ​

  • Complete the basic viewer integration in Using CPDFReaderView before validating TalkBack behavior.
  • If your app adds custom layouts or wraps extra buttons around the viewer, run a full focus traversal test on a real device.
  • If you need feature-specific validation for display modes, outlines, bookmarks, or search, verify those workflows together with the corresponding viewer guides.

Notes ​

  • This page documents that the ComPDF Android PDF viewer provides TalkBack support.
  • If your app deeply customizes the viewer UI, the final accessibility experience should be validated together with the host app implementation.
  • If you observe issues with announcements, focus movement, or interaction feedback on specific devices, system versions, or custom layouts, contact technical support for further investigation.