android 动态设置android:drawableLeft|Right|Top|Bottom
http://blog.csdn.net/dadagm/article/details/8980515
Drawable drawable=getResources().getDrawable(R.drawable.img);
drawable.setBounds(0, 0, drawable.getMinimumWidth(), drawable.getMinimumHeight());
view.setCompoundDrawables(drawable, null, null,null);