android 图文按钮

ImageGetter imageGetter = new Html.ImageGetter() {

            @Override
            public Drawable getDrawable(String source) {
                Drawable drawable = null;
                drawable = historyBtn.getResources().getDrawable(Integer.parseInt(source));
                drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),drawable.getIntrinsicHeight());
                return drawable;
            }
        };
        StringBuffer sb = new StringBuffer();
        sb.append("<img src=\"").append(R.drawable.xhsf_button_download).append("\"/>").append("<font color=\"6f6f6f\">&nbsp;历史</font>");;
        Spanned span = Html.fromHtml(sb.toString(), imageGetter, null);
        historyBtn.setText(span);
        sb = null;