How to check TalkBack on/off status and get change notifications in Android mobile?

Question

I'm working on an Android mobile application and need to know if TalkBack is active on startup and detect TalkBack off/on state changes while application is running.

Previously the code used JavaScript accessibility component and called C++ and then Java. Now we only want Java code.

How can I implement this functionality?

Answer 1

I was able to get the Talkback active/inactive status notification using AccessibilityManager.addTouchExplorationStateChangeListener. This resolved the issue I had with Android mobile.

    try {
        am = (AccessibilityManager) context.getSystemService(Context.ACCESSIBILITY_SERVICE);

        am.addTouchExplorationStateChangeListener(new AccessibilityManager.TouchExplorationStateChangeListener () {
            @Override
            public void onTouchExplorationStateChanged(boolean enabled) {
                onTalkbackStatusChanged(enabled);
            }
        });
    } catch(Exception ex) {
       ...
    }