toast添加图片

case R.id.btn_3:
            Toast my = Toast.makeText(MainActivity.this, "short",
                    Toast.LENGTH_SHORT);
            //设置显示的位置
            my.setGravity(Gravity.CENTER_HORIZONTAL, 60, 40);
            //返回视图
            LinearLayout lin = (LinearLayout) my.getView();
            ImageView img = new ImageView(MainActivity.this);
            img.setImageResource(R.drawable.ic_launcher);
            //把图片加入到布局里，并且在文字之上
            lin.addView(img, 0);
            my.show();
            break;