Android图文混排，以及居中处理

//图文混排
String text = "商家折扣（-10%）" + " ";
SpannableStringBuilder spannable = new SpannableStringBuilder(text);
CenterImageSpan imageSpan = new CenterImageSpan(MyApplication.getInstance().getApplicationContext(), R.mipmap.ic_qa_14);
spannable.setSpan(imageSpan,text.length() -1, text.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
holder.mDataBinding.orderGoodsName.setText(spannable);

private class CenterImageSpan extends ImageSpan {

    private CenterImageSpan(Context arg0, int arg1) {
        super(arg0, arg1);
    }

    public int getSize(@NotNull Paint paint, CharSequence text, int start, int end, Paint.FontMetricsInt fm) {

        Drawable d = getDrawable();
        Rect rect = d.getBounds();

        if (fm != null) {
            Paint.FontMetricsInt fmPaint=paint.getFontMetricsInt();
            int fontHeight = fmPaint.bottom - fmPaint.top;
            int drHeight=rect.bottom-rect.top;

            int top= drHeight/2 - fontHeight/4;
            int bottom=drHeight/2 + fontHeight/4;

            fm.ascent=-bottom;
            fm.top=-bottom;
            fm.bottom=top;
            fm.descent=top;
        }

        return rect.right;
    }

    @Override
    public void draw(@NotNull Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, @NotNull Paint paint) {

        Drawable b = getDrawable();
        canvas.save();
        int transY = 0;
        transY = ((bottom-top) - b.getBounds().bottom)/2+top;
        canvas.translate(x, transY);
        b.draw(canvas);
        canvas.restore();
    }
}

最后

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