Android中TextView 多行文字末尾添加图片居中

revolve 2018-07-10 原文

private TextView text；
String text=”这里是多行文字”;
SpannableString newText = new SpannableString(text+ ” “);
int len = newText.length();
//加载本地资源图片
Drawable d = ContextCompat.getDrawable(mContext, (R.drawable.abc_pic));
//距离文字左边距10dp
d.setBounds(10, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());
//自定义图片居中
CenterAlignImageSpan span = new CenterAlignImageSpan(d);
newText.setSpan(span, len – 1, len, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
text.setText(newText);

   /**
* 自定义图片居中
*/
    public class CenterAlignImageSpan extends ImageSpan {

        public CenterAlignImageSpan(Drawable drawable) {
            super(drawable);
        }

        public CenterAlignImageSpan(Bitmap b) {
            super(b);
        }

        @Override
        public void draw(@NonNull Canvas canvas, CharSequence text, int start,
                         int end, float x, int top, int y, int bottom, @NonNull Paint paint){
            Drawable b = getDrawable();
            Paint.FontMetricsInt fm = paint.getFontMetricsInt();

　　　　　//计算y方向的位移
int transY = (y + fm.descent + y + fm.ascent) / 2 – b.getBounds().bottom / 2;
canvas.save();

　　　　　//绘制图片位移一段距离
            canvas.translate(x, transY);
            b.draw(canvas); canvas.restore();
        }

}