An android method to set the opacity of a view while supporting API 1+.

setOpacity(View view, float alpha)

/**
 * Sets the opacity of the view. This is a value from 0 to 1, where 0 means the view is
 * completely transparent and 1 means the view is completely opaque.
 * 
 * @param alpha The opacity of the view.
 * @param view The view to change.
 * 
 */
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public void setOpacity(View view, float alpha) {
	if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB) {
		view.setAlpha(alpha);
	} else {
		AlphaAnimation alphaAnim = new AlphaAnimation(alpha, alpha);
		alphaAnim.setDuration(0);
		alphaAnim.setFillAfter(true);
		view.startAnimation(alphaAnim);
	}
}