Android's ImageView scaling hack

ScalingImageView.java

package net.evendanan.android.hacks;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;

/****
*Note, this ImageView hack will ALWAYS scale the image (up or down) to fit the available
*space, while keeping the image aspect ratio.
*/
public class ScalingImageView extends android.widget.ImageView {

	private static final String TAG = "ScalingImageView";

	public ScalingImageView(Context context) {
		super(context);
	}

	public ScalingImageView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	public ScalingImageView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
		Log.d(TAG, "onMeasure w:"+widthMeasureSpec+" h:"+heightMeasureSpec);
		Log.d(TAG, "onMeasure result w:"+getMeasuredWidth()+" h:"+getMeasuredHeight());
		Drawable d = getDrawable();
		if (d != null) {
			Log.d(TAG, "Drawable w:"+d.getMinimumWidth()+" h:"+d.getMinimumHeight());
			//let's try to fix things up.
			final double ratio = ((double)d.getMinimumWidth())/((double)d.getMinimumHeight());
			//getting the minimum dim of this view
			int idealWidth = (int)(getMeasuredHeight() * ratio);
			int idealHeight = (int)(getMeasuredWidth() / ratio);
			//these are ideal, but with no respect to the other dim
			Log.d(TAG, "Ideal dims w:"+idealWidth+" h:"+idealHeight);
			//now.. Who is breaking the borders of the view?
			final int width;
			final int height;
			if (idealWidth > getMeasuredWidth()) {
				//I should reduce the height size.
				width = getMeasuredWidth();
				height = idealHeight;
			} else {
				width = idealWidth;
				height = getMeasuredHeight();
			}
			Log.d(TAG, "onMeasure new values w:"+width+" h:"+height);
			setMeasuredDimension(width, height);
		} else {
			Log.d(TAG, "Drawable is null");
		}
	}
}