How to center icon and text in a android button with width set to "fill parent"

I want to have an Android Button with icon+text centered inside it. I'm using the drawableLeft attribute to set the image, this works well if the button has a width of "wrap_content" but I need to stretch to max width so I use width "fill_parent". This moves my icon straight to the left of the button and I want both icon and text centered inside the button. I've try setting up the padding but this

[ku_marin]

アイコンが左にあって、テキストをセンター揃えさせたい時

[godagoda]

TextFieldの画像をセンターに配置