Drawable img = layout.getResources().getDrawable(R.drawable.icon);
// 调用setCompoundDrawables时，必须调用Drawable.setBounds()方法,否则图片不显示
img.setBounds(0, 0, img.getMinimumWidth(), img.getMinimumHeight());
textView.setCompoundDrawables(img, null, null, null); //设置左图标
