Shown to show transparency

Meh

    @Override
    protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
        final LayoutParams lp = (LayoutParams) child.getLayoutParams();
        boolean result;
        final int save = canvas.save(Canvas.CLIP_SAVE_FLAG);

        boolean drawScrim = false;
        boolean mDrawBehind = true;

        if (!mDrawBehind && mCanSlide && !lp.slideable && mSlideableView != null) {
            // Clip against the slider; no sense drawing what will immediately be covered.
            canvas.getClipBounds(mTmpRect);
            mTmpRect.bottom = Math.min(mTmpRect.bottom, mSlideableView.getTop());
            canvas.clipRect(mTmpRect);
            if (mSlideOffset < 1) {
                drawScrim = true;
            }
        }

        result = super.drawChild(canvas, child, drawingTime);
        canvas.restoreToCount(save);

        if (drawScrim) {
            final int baseAlpha = (mCoveredFadeColor & 0xff000000) >>> 24;
            final int imag = (int) (baseAlpha * (1 - mSlideOffset));
            final int color = imag << 24 | (mCoveredFadeColor & 0xffffff);
            mCoveredFadePaint.setColor(color);
            canvas.drawRect(mTmpRect, mCoveredFadePaint);
        }

        return result;
    }