subclass of ImageView which nulls the drawable references and calls gc when the imageview is detached from the window - http://bit.ly/L5OWwu

gistfile1.java

public class SingleShotImageView extends ImageView {

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

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

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

	@Override
	protected void onDetachedFromWindow () {
		setImageDrawable(null);
		setBackgroundDrawable(null);
		System.gc();
	}
	
}