setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top, Drawable right, Drawable bottom)

api原文为：

Sets the Drawables (if any) to appear to the left of, above, to the right of, and below the text. Use null if you do not want a Drawable there. The Drawables’ bounds will be set to their intrinsic bounds.

设置drawable到textview的上下左右位置中去，图片大小就是drawable的intrinsic大小

setCompoundDrawables(Drawable left, Drawable top, Drawable right, Drawable bottom)

api原文为：

Sets the Drawables (if any) to appear to the left of, above, to the right of, and below the text. Use null if you do not want a Drawable there. The Drawables must already have had setBounds(Rect) called.

设置的drawable必须要先设置Bounds

setCompoundDrawablePadding(int pad)

api原味为：

Sets the size of the padding between the compound drawables and the text.

设置drawable和text的间距pandding