android 给button 设置做图标注意

Drawable img_focus = mContext.getResources().getDrawable(R.drawable.ic_has_focus);

// 调用setCompoundDrawables时，必须调用Drawable.setBounds()方法,否则图片不显示
img_focus.setBounds(0, 0, img_focus.getMinimumWidth(), img_focus.getMinimumHeight());

holder_type2.btn_care.setCompoundDrawables(img_focus, null, null, null); //设置左图标