Text color animation

The Easiest solution will be to use Object Animators :

ObjectAnimator colorAnim = ObjectAnimator.ofInt(yourTextView, "textColor",
            Color.RED, Color.GREEN);
            colorAnim.setEvaluator(new ArgbEvaluator());
            colorAnim.start();

No need to keep handles to the two text views. First add the fadeIn/fadeOut animations:

textSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));
textSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));

then:

TextView currentTextView = (TextView)(textSwitcher.getNextView().equals(
  textSwitcher.getChildAt(0)) ? 
  textSwitcher.getChildAt(1) : textSwitcher.getChildAt(0)
);
// setCurrentText() first to be the same as newText if you need to
textSwitcher.setTextColor(fadeOutColor);
((TextView) textSwitcher.getNextView()).setTextColor(Color.WHITE);
textSwitcher.setText(newText);

Just implemented it like this so proven to work.

You can use new Property Animation Api for color animation:

Integer colorFrom = getResources().getColor(R.color.red);
Integer colorTo = getResources().getColor(R.color.blue);
ValueAnimator colorAnimation = ValueAnimator.ofObject(new ArgbEvaluator(), colorFrom, colorTo);
colorAnimation.addUpdateListener(new AnimatorUpdateListener() {

    @Override
    public void onAnimationUpdate(ValueAnimator animator) {
        textView.setTextColor((Integer)animator.getAnimatedValue());
    }

});
colorAnimation.start();

For backward compatability with Android 2.x use Nine Old Androids library from Jake Wharton.