java/com/android/dialer/animation/AnimUtils.java

/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License
 */

package com.android.dialer.animation;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.view.View;
import android.view.ViewPropertyAnimator;
import android.view.animation.Interpolator;
import android.view.animation.PathInterpolator;

public class AnimUtils {

  public static final int DEFAULT_DURATION = -1;
  public static final int NO_DELAY = 0;

  public static final Interpolator EASE_IN = new PathInterpolator(0.0f, 0.0f, 0.2f, 1.0f);
  public static final Interpolator EASE_OUT = new PathInterpolator(0.4f, 0.0f, 1.0f, 1.0f);
  public static final Interpolator EASE_OUT_EASE_IN = new PathInterpolator(0.4f, 0, 0.2f, 1);

  public static void crossFadeViews(View fadeIn, View fadeOut, int duration) {
    fadeIn(fadeIn, duration);
    fadeOut(fadeOut, duration);
  }

  public static void fadeOut(View fadeOut, int duration) {
    fadeOut(fadeOut, duration, null);
  }

  public static void fadeOut(final View fadeOut, int durationMs, final AnimationCallback callback) {
    fadeOut.setAlpha(1);
    final ViewPropertyAnimator animator = fadeOut.animate();
    animator.cancel();
    animator
        .alpha(0)
        .withLayer()
        .setListener(
            new AnimatorListenerAdapter() {
              @Override
              public void onAnimationEnd(Animator animation) {
                fadeOut.setVisibility(View.GONE);
                if (callback != null) {
                  callback.onAnimationEnd();
                }
              }

              @Override
              public void onAnimationCancel(Animator animation) {
                fadeOut.setVisibility(View.GONE);
                fadeOut.setAlpha(0);
                if (callback != null) {
                  callback.onAnimationCancel();
                }
              }
            });
    if (durationMs != DEFAULT_DURATION) {
      animator.setDuration(durationMs);
    }
    animator.start();
  }

  public static void fadeIn(View fadeIn, int durationMs) {
    fadeIn(fadeIn, durationMs, NO_DELAY, null);
  }

  public static void fadeIn(
      final View fadeIn, int durationMs, int delay, final AnimationCallback callback) {
    fadeIn.setAlpha(0);
    final ViewPropertyAnimator animator = fadeIn.animate();
    animator.cancel();

    animator.setStartDelay(delay);
    animator
        .alpha(1)
        .withLayer()
        .setListener(
            new AnimatorListenerAdapter() {
              @Override
              public void onAnimationStart(Animator animation) {
                fadeIn.setVisibility(View.VISIBLE);
              }

              @Override
              public void onAnimationCancel(Animator animation) {
                fadeIn.setAlpha(1);
                if (callback != null) {
                  callback.onAnimationCancel();
                }
              }

              @Override
              public void onAnimationEnd(Animator animation) {
                if (callback != null) {
                  callback.onAnimationEnd();
                }
              }
            });
    if (durationMs != DEFAULT_DURATION) {
      animator.setDuration(durationMs);
    }
    animator.start();
  }

  public static class AnimationCallback {

    public void onAnimationEnd() {}

    public void onAnimationCancel() {}
  }
}