gistfile1.txt

	private void setupFadingToolbarScrollView() {
		final ImageView iv = (ImageView) findViewById(R.id.toolbar_anchored_image);
		if(iv == null)
			throw new NullPointerException("You must declare an imageview named 'toolbar_anchored_image' to use fading toolbar");

		int imageHeight = iv.getLayoutParams().height;
		int toolbarHeight = mToolbar.getHeight();

		int actionBarFullAlphaAt = imageHeight - toolbarHeight;
		final float alphaScale = 255f / actionBarFullAlphaAt;

		final Drawable drawable = getResources().getDrawable(R.drawable.actionbar_background);
		//Use existing alpha which will either be 0, or passed from savedInstanceState
		drawable.setAlpha((int) mToolbarAlpha);

		mToolbar.setBackground(drawable);

		//TODO do the commented out section below when you have time
		//If they have a title declared, set it up for falling into the toolbar
		final TextView title = (TextView) findViewById(R.id.toolbar_anchored_title);
		final ViewGroup root = (ViewGroup) findViewById(R.id.root);


		int finalTitleY = 120; //TODO replace with correct dimen based on whatever
		int finalTitleX = 180; //TODO replace with correct dimen based on whatever

		int[] startingPosition = new int[2];
		title.getLocationInWindow(startingPosition);

		final int startingX = startingPosition[0];
		final int startingY = startingPosition[1];

		//Start moving title as soon as title hits bottom of toolbar
		final int moveTitleStartAt = startingY - toolbarHeight;

		final float moveTitleFinishedAt = actionBarFullAlphaAt; //TODO just for now

		final float yScale = finalTitleY / moveTitleFinishedAt;
		final float xScale = finalTitleX / moveTitleFinishedAt;

		ObservableScrollView scrollView = (ObservableScrollView) findViewById(R.id.toolbar_anchored_scrollview);
		if(scrollView == null)
			throw new NullPointerException("Your must declare an ObservableScrollView named 'toolbar_anchored_scrollview' to use fading toolbar");

		scrollView.setOnScrollChangedListener(new ObservableScrollView.OnScrollListener() {

			private TextView aNewTitle;

			@Override
			public void onScroll(int l, int t) {
				//Get alpha for toolbar background
				mToolbarAlpha = alphaScale * t;
				mToolbarAlpha = Math.min(mToolbarAlpha, 255f);
				mToolbarAlpha = Math.max(mToolbarAlpha, 0);

				drawable.setAlpha((int) mToolbarAlpha);

				//Only apply when between the move sections, this might be done cleaner with min and max like above
				if(t >= moveTitleStartAt && t <= moveTitleFinishedAt) {
					Print.log("in the title move zone", t, moveTitleStartAt);

					//This makes the 0 point the point at which we start moving, not 0 itself
					int pixelsFromStartPoint = t - moveTitleStartAt;

					//At 0, the view should be at its starting position, so we add them to the formula
					float newX = xScale * pixelsFromStartPoint + startingX;
					float newY = yScale * pixelsFromStartPoint + startingY;

					Print.log("new coords", newX, newY);

					if(aNewTitle == null) {
						aNewTitle = new TextView(BaseActivity.this);
						aNewTitle.setTextAppearance(BaseActivity.this, R.style.Widget_Bandsintown_ImageOverlayTextAppearance);
						aNewTitle.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 24); //TODO make a dimen resource
						aNewTitle.setText(title.getText());
						root.addView(aNewTitle);
					}

					aNewTitle.setX(newX);
					aNewTitle.setY(newY);

					if(pixelsFromStartPoint > 0) {
						title.setVisibility(View.GONE);
						aNewTitle.setVisibility(View.VISIBLE);
					}
					else {
						title.setVisibility(View.VISIBLE);
						aNewTitle.setVisibility(View.GONE);
					}
				}
			}

		});
	}