Detecting thumb position in SeekBar prior to API version 16

Question

Basically, I need to detect when the progress changes in the SeekBar and draw a text view on top of the thumb indicating the progress value.

I do this by implementing a

Answer 1

@Sherif elKhatib's answer is great but has the disadvantage of caching a copy of the thumb even on API>=16. I've improved it so that it only caches the Thumb Drawable on API<=15 plus it overrides the method in SeekBar.java to avoid having two methods do the same on API>=16. Only downside: It needs target SDK to be >= 16 which should be the case in most apps nowadays.

public class ThumbSeekBar extends AppCompatSeekBar {

    private Drawable thumb;

    public ThumbSeekBar(Context context) {
        super(context);
    }

    public ThumbSeekBar(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ThumbSeekBar(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public Drawable getThumb() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            return super.getThumb();
        }
        return thumb;
    }

    @Override
    public void setThumb(Drawable thumb) {
        super.setThumb(thumb);
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
            this.thumb = thumb;
        }
    }
}