Source code
package android.support.design.widget;
import android.support.v4.view.animation.FastOutSlowInInterpolator;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.DecelerateInterpolator;
import android.view.animation.Interpolator;
import android.view.animation.LinearInterpolator;
class AnimationUtils {
static final Interpolator DECELERATE_INTERPOLATOR = new DecelerateInterpolator();
static final Interpolator FAST_OUT_SLOW_IN_INTERPOLATOR = new FastOutSlowInInterpolator();
static final Interpolator LINEAR_INTERPOLATOR = new LinearInterpolator();
static class AnimationListenerAdapter implements AnimationListener {
AnimationListenerAdapter() {
}
public void onAnimationStart(Animation animation) {
}
public void onAnimationEnd(Animation animation) {
}
public void onAnimationRepeat(Animation animation) {
}
}
AnimationUtils() {
}
static float lerp(float startValue, float endValue, float fraction) {
return ((endValue - startValue) * fraction) + startValue;
}
static int lerp(int startValue, int endValue, float fraction) {
return Math.round(((float) (endValue - startValue)) * fraction) + startValue;
}
}