android - IconMarginSpan 文本不换行问题，用DynamicDrawableSpan和ImageSpan图标没外边距

IconMarginSpan 方法很少，chooseHeight方法有这个作用吗，怎么改才能像DynamicDrawableSpan和ImageSpan设置DynamicDrawableSpan#ALIGN_BASELINE这样后面的文本能换行

public void chooseHeight(CharSequence text, int start, int end,
                             int istartv, int v,
                             Paint.FontMetricsInt fm) {
        if (end == ((Spanned) text).getSpanEnd(this)) {
            int ht = mBitmap.getHeight();

            int need = ht - (v + fm.descent - fm.ascent - istartv);
            if (need > 0)
                fm.descent += need;

            need = ht - (v + fm.bottom - fm.top - istartv);
            if (need > 0)
                fm.bottom += need;
        }
    }

加个空格。。。。。。就行了