Color Cross Fade
Simple color cross fade utility for Android. Supported types: RGB, ARGB, HSV, HSV (with alpha).
Introduction
The main concept of CCFAnimator
is to be able to evaluate a color value that lies between two supplied colors given the fraction (.0F - 1.F). This gives ability to smoothly transition from one state to other, for example during ViewPager page changes (positionOffset value of OnPageChangeListener), during scroll changes of numerous scrolling widgets (RecyclerView, ListView, ScrollView, etc) and much more places where there is a state change & this change could be represented as a float in range .0F - 1.F.
Also, CCFAnimator
could be used as a ValueAnimator, to just trigger color animations. CCFAnimator.asValueAnimator(OnNewColorListener)
returns a ValueAnimator that could be further customized (animation duration, interpolation, etc).
There is an ability to animate between more than two (2) colors. Use build-in methods in CCFAnimator
that takes an array (rgb, argb, hsv).
Usage
RGB
Animates between supplied colors, but ignores alpha channel
CCFAnimator.rgb(int fromColor, int toColor);
CCFAnimator.rgb(int[] colors);
ARGB
Animates between supplied colors changing a-r-g-b
channels of colors
CCFAnimator.argb(int fromColor, int toColor);
CCFAnimator.argb(int[] colors);
CCFAnimator.alpha(int color, int toAlpha); // animates alpha value of one color
HSV
Animates between supplied colors changing h-s-v
channels of colors
// no alpha
CCFAnimator.hsv(int fromColor, int toColor);
CCFAnimator.hsv(int[] colors);
// with alpha channel
CCFAnimator.hsv(int fromColor, int toColor, int fromAlpha, int toAlpha);
Concat
Instances of CCFAnimator
of any type could be merged into one CCFAnimator
. This could be helpfull when different types of color animations are used for one cross-fade animation (RGB, ARGB, HSV)
CCFAnimator.concat(
CCFAnimator.rgb(...),
CCFAnimator.argb(...),
CCFAnimator.hsv(...)
);
ValueAnimator
final CCFAnimator ccf = CCFAnimator.rgb(...);
final ValueAnimator animator = ccf.asValueAnimator(new OnNewColorListener() {
@Override
public void onNewColor(int color) {
// ready to use color
mSomeView.setBackgroundColor(color);
}
});
animator.setDuration(1000L);
animator.setInterpolator(new AccelerateInterpolator());
animator.start();
License
Copyright 2015 Dimitry Ivanov (mail@dimitryivanov.ru)
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.