How to prevent android talkback to speak seekbar progress

Question

I have a custom control extending SeekBar, in which I have overridden onInitializeAccessibilityNodeInfo as below:

@Override
public          


        

Answer 1

Thanks to @nick-peppers answer https://stackoverflow.com/a/58434362/2713403 I had started to understand better how AccessibilityDelegate works, so I made a different solution because I wanted to select the seekbar. By removing the super call from OnInitializeAccessibilityEvent method, it wasn't possible to keep the selection on the seek bar if the user clicks, so I made this (Tested on Android 11, 10 and 9)

...
seekbar.setAccessibilityDelegate(new customSeekBarDelegate());
...

/**
 * Create a custom delegate to modify what Talkback is going to read out loud
 */
private class customSeekBarDelegate extends View.AccessibilityDelegate
{
    /**
     * If the selected view is the slider, populate the text to read by talkback.
     * On Android 10 and 9, the view got selected from the beginning without touch the slider,
     * so the TYPE_VIEW_SELECTED event is controlled.
     * The text should be overwritten to trigger what Talkback do need to read.
     *
     * @param host The view selected
     * @param event The event to initialise
     */
    @Override public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event)
    {
        super.onInitializeAccessibilityEvent(host, event);
        if (event.getEventType() != AccessibilityEvent.TYPE_VIEW_SELECTED)
        {
            seekbarText.setText(seekbarText.getText());
        }
    }

    /**
     * Send all accessibility events except the focused accessibility event
     * because it reads the percentage, so it needs to be changed to no focused to read
     * the sliderText.
     *
     * @param host the view selected
     * @param eventType The accessibility event to send
     */
    @Override public void sendAccessibilityEvent(View host, int eventType)
    {
        if (eventType == AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED)
        {
            eventType = AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED;
        }

        super.sendAccessibilityEvent(host, eventType);
    }

    /**
     * If the slider changes, it won't send the AccessibilityEvent TYPE_WINDOW_CONTENT_CHANGED
     * because it reads the percentages, so in that way it will read the sliderText.
     * On Android 10 and 9, the view got selected when it changes, so the TYPE_VIEW_SELECTED
     * event is controlled.
     *
     * @param host the view selected
     * @param event the accessibility event to send
     */
    @Override public void sendAccessibilityEventUnchecked(View host, AccessibilityEvent event)
    {
        if (event.getEventType() != AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED
            && event.getEventType() != AccessibilityEvent.TYPE_VIEW_SELECTED)
        {
            super.sendAccessibilityEventUnchecked(host, event);
        }
    }
}

So in that way, I could have selected the seekbar, and read out loud without percentages. Don't forguet to attach the event SeekBar.OnSeekBarChangeListener to the seekbar to update the seekbar text when it changes.