Android 的无障碍星级评分

Question

I recently included the RatingBar view into a layout and realized it is not compatible with Talkback (it is not accessible). How can I have a star rating view that takes into account Talkback users?

Answer 1

Here are some ideas for anyone else who ends up here. I'm using targetSdk=28 and the androidx libraries.

Problem 1: Talkback skips the RatingBar when announcing the content in a ViewGroup.

Solution: Add a TextView with the desired announcement. Make it 0dp, so it won't affect your layout. INVISIBLE or GONE won't work.

<TextView
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:text="4.1 of 5 stars"/>

Solution: Display the number of ratings, and add the stars to the contentDescription. (do it programmatically, though)

<TextView
    android:id="@+id/ratingCountTextView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="23"
    android:contentDescription="4.1 of 5 stars from 23 users"/>

Problem 2: Tapping on a RatingBar to hear the value. contentDescription works in this case, and you can set it in code.

<RatingBar
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:numStars="5"
    android:rating="3.5"
    android:stepSize="1"
    android:contentDescription="4.1 of 5 stars"/>

Tapping and dragging on a RatingBar to change the value seems to work. It says 20%, 40%, 60%.

Answer 2

I found an example of what I need here:

https://github.com/google/iosched/blob/2017/lib/src/main/java/com/google/samples/apps/iosched/ui/widget/CustomRatingBar.java