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.animation.ValueAnimator;
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();
  }

  /**
   * Scales in the view from scale of 0 to actual dimensions.
   *
   * @param view The view to scale.
   * @param durationMs The duration of the scaling in milliseconds.
   * @param startDelayMs The delay to applying the scaling in milliseconds.
   */
  public static void scaleIn(final View view, int durationMs, int startDelayMs) {
    AnimatorListenerAdapter listener =
        (new AnimatorListenerAdapter() {
          @Override
          public void onAnimationStart(Animator animation) {
            view.setVisibility(View.VISIBLE);
          }

          @Override
          public void onAnimationCancel(Animator animation) {
            view.setScaleX(1);
            view.setScaleY(1);
          }
        });
    scaleInternal(
        view,
        0 /* startScaleValue */,
        1 /* endScaleValue */,
        durationMs,
        startDelayMs,
        listener,
        EASE_IN);
  }

  /**
   * Scales out the view from actual dimensions to 0.
   *
   * @param view The view to scale.
   * @param durationMs The duration of the scaling in milliseconds.
   */
  public static void scaleOut(final View view, int durationMs) {
    AnimatorListenerAdapter listener =
        new AnimatorListenerAdapter() {
          @Override
          public void onAnimationEnd(Animator animation) {
            view.setVisibility(View.GONE);
          }

          @Override
          public void onAnimationCancel(Animator animation) {
            view.setVisibility(View.GONE);
            view.setScaleX(0);
            view.setScaleY(0);
          }
        };

    scaleInternal(
        view,
        1 /* startScaleValue */,
        0 /* endScaleValue */,
        durationMs,
        NO_DELAY,
        listener,
        EASE_OUT);
  }

  private static void scaleInternal(
      final View view,
      int startScaleValue,
      int endScaleValue,
      int durationMs,
      int startDelay,
      AnimatorListenerAdapter listener,
      Interpolator interpolator) {
    view.setScaleX(startScaleValue);
    view.setScaleY(startScaleValue);

    final ViewPropertyAnimator animator = view.animate();
    animator.cancel();

    animator
        .setInterpolator(interpolator)
        .scaleX(endScaleValue)
        .scaleY(endScaleValue)
        .setListener(listener)
        .withLayer();

    if (durationMs != DEFAULT_DURATION) {
      animator.setDuration(durationMs);
    }
    animator.setStartDelay(startDelay);

    animator.start();
  }

  /**
   * Animates a view to the new specified dimensions.
   *
   * @param view The view to change the dimensions of.
   * @param newWidth The new width of the view.
   * @param newHeight The new height of the view.
   */
  public static void changeDimensions(final View view, final int newWidth, final int newHeight) {
    ValueAnimator animator = ValueAnimator.ofFloat(0f, 1f);

    final int oldWidth = view.getWidth();
    final int oldHeight = view.getHeight();
    final int deltaWidth = newWidth - oldWidth;
    final int deltaHeight = newHeight - oldHeight;

    animator.addUpdateListener(
        new ValueAnimator.AnimatorUpdateListener() {
          @Override
          public void onAnimationUpdate(ValueAnimator animator) {
            Float value = (Float) animator.getAnimatedValue();

            view.getLayoutParams().width = (int) (value * deltaWidth + oldWidth);
            view.getLayoutParams().height = (int) (value * deltaHeight + oldHeight);
            view.requestLayout();
          }
        });
    animator.start();
  }

  public static class AnimationCallback {

    public void onAnimationEnd() {}

    public void onAnimationCancel() {}
  }
}