Some apps dynamically generate GUI components in response to user interactions. For such GUI components, you can programmatically set the accessibility text. The following Android developer documentation pages provide more information about Android’s accessibility features and a checklist to follow when developing accessible apps:
http://developer.android.com/design/patterns/accessibility.html
http://developer.android.com/guide/topics/ui/accessibility/index.html
http://developer.android.com/guide/topics/ui/accessibility/checklist.html