Customize setbound value for viewing original image size

image.setBounds((getWi开发者_Python百科dth()/2)-zoomControler, (getHeight()/2)-zoomControler,
                (getWidth()/2)+zoomControler, (getHeight()/2)+zoomControler);

i want to set bounds value for original image size,how can i set the value for display original image size

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drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());