Snippet showing how to send accessibility focus to an specific UI element after TalkBack started.

SendFocusAfterTalkBackStart.kt

/**
 * With this function we are observing a specific accessibility service started/stopped: TalkBack
 */
private fun onTalkBackStateChanged(isOn: Boolean) {
    if (isOn) {
        accessibility_state.text = getString(R.string.accessibility_state_on)
        accessibility_state.weakPostDelayed { sendFocusToTitle() }
    } else {
        accessibility_state.text = getString(R.string.accessibility_state_off)
    }
}

private fun sendFocusToTitle() = with(accessibility_state) {
    requestFocus()
    sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED)
}