private float interpolate(){
  long currTime=System.currentTimeMillis();
  float elapsed=(currTime - startTime) / ZOOM_TIME;
  elapsed=Math.min(1f,elapsed);
  return interpolator.getInterpolation(elapsed);
}

private float interpolate ( ) { long currTime = System . currentTimeMillis ( ) ; float elapsed = ( currTime - startTime ) / ZOOM_TIME ; elapsed = Math . min ( 1f , elapsed ) ; return interpolator . getInterpolation ( elapsed ) ; }
use interpolator to get t
