DrawableRight

Drawable rightDrawable = getResources().getDrawable(R.drawable.icon);  

rightDrawable.setBounds(0, 0, rightDrawable.getMinimumWidth(), rightDrawable.getMinimumHeight());  

tv.setCompoundDrawables(null, null, rightDrawable, null);  

setCompoundDrawables 画的drawable的宽高是按drawable.setBound()设置的宽高，所以才有The Drawables must already have had setBounds(Rect) called，即使用之前必须使用Drawable.setBounds设置Drawable的长宽。

而setCompoundDrawablesWithIntrinsicBounds是画的drawable的宽高是按drawable固定的宽高，所以才有The Drawables' bounds will be set to their intrinsic bounds.即通过getIntrinsicWidth()与getIntrinsicHeight()获得。

一般，建议使用setCompoundDrawablesWithIntrinsicBounds，这样你即无需设置Drawables的bounds了。