How do you animate the change of background color of a view on Android?
For example:
I have a view with a red background color. The background color of the view changes to blue. How can I do a smooth transition between colors?
If this can't be done with views, an alternative will be welcome.
This question is related to
android
animation
view
background-color
You can make an object animator. For example, I have a targetView and I want to change your background color:
int colorFrom = Color.RED;
int colorTo = Color.GREEN;
int duration = 1000;
ObjectAnimator.ofObject(targetView, "backgroundColor", new ArgbEvaluator(), colorFrom, colorTo)
.setDuration(duration)
.start();
Use the below function for Kotlin:
private fun animateColorValue(view: View) {
val colorAnimation =
ValueAnimator.ofObject(ArgbEvaluator(), Color.GRAY, Color.CYAN)
colorAnimation.duration = 500L
colorAnimation.addUpdateListener { animator -> view.setBackgroundColor(animator.animatedValue as Int) }
colorAnimation.start()
}
Pass whatever view you want to change color of.
Depending on how your view gets its background color and how you get your target color there are several different ways to do this.
The first two uses the Android Property Animation framework.
Use a Object Animator if:
argb
value in a xml file.view.setBackgroundColor()
The object animator works by calling view.setBackgroundColor
which replaces the defined drawable unless is it an instance of a ColorDrawable
, which it rarely is. This means that any extra background properties from a drawable like stroke or corners will be removed.
Use a Value Animator if:
Use a Transition drawable if:
I have had some performance issues with Transition drawables that runs while I am opening a DrawerLayout that I haven't been able to solve, so if you encounter any unexpected stuttering you might have run into the same bug as I have.
You will have to modify the Value Animator example if you want to use a StateLists drawable or a LayerLists drawable, otherwise it will crash on the final GradientDrawable background = (GradientDrawable) view.getBackground();
line.
View definition:
<View
android:background="#FFFF0000"
android:layout_width="50dp"
android:layout_height="50dp"/>
Create and use a ObjectAnimator
like this.
final ObjectAnimator backgroundColorAnimator = ObjectAnimator.ofObject(view,
"backgroundColor",
new ArgbEvaluator(),
0xFFFFFFFF,
0xff78c5f9);
backgroundColorAnimator.setDuration(300);
backgroundColorAnimator.start();
You can also load the animation definition from a xml using a AnimatorInflater like XMight does in Android objectAnimator animate backgroundColor of Layout
View definition:
<View
android:background="@drawable/example"
android:layout_width="50dp"
android:layout_height="50dp"/>
Drawable definition:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#FFFFFF"/>
<stroke
android:color="#edf0f6"
android:width="1dp"/>
<corners android:radius="3dp"/>
</shape>
Create and use a ValueAnimator like this:
final ValueAnimator valueAnimator = ValueAnimator.ofObject(new ArgbEvaluator(),
0xFFFFFFFF,
0xff78c5f9);
final GradientDrawable background = (GradientDrawable) view.getBackground();
currentAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(final ValueAnimator animator) {
background.setColor((Integer) animator.getAnimatedValue());
}
});
currentAnimation.setDuration(300);
currentAnimation.start();
View definition:
<View
android:background="@drawable/example"
android:layout_width="50dp"
android:layout_height="50dp"/>
Drawable definition:
<?xml version="1.0" encoding="utf-8"?>
<transition xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape>
<solid android:color="#FFFFFF"/>
<stroke
android:color="#edf0f6"
android:width="1dp"/>
<corners android:radius="3dp"/>
</shape>
</item>
<item>
<shape>
<solid android:color="#78c5f9"/>
<stroke
android:color="#68aff4"
android:width="1dp"/>
<corners android:radius="3dp"/>
</shape>
</item>
</transition>
Use the TransitionDrawable like this:
final TransitionDrawable background = (TransitionDrawable) view.getBackground();
background.startTransition(300);
You can reverse the animations by calling .reverse()
on the animation instance.
There are some other ways to do animations but these three is probably the most common. I generally use a ValueAnimator.
Here's a nice function that allows this:
public static void animateBetweenColors(final @NonNull View viewToAnimateItsBackground, final int colorFrom,
final int colorTo, final int durationInMs) {
final ColorDrawable colorDrawable = new ColorDrawable(durationInMs > 0 ? colorFrom : colorTo);
ViewCompat.setBackground(viewToAnimateItsBackground, colorDrawable);
if (durationInMs > 0) {
final ValueAnimator colorAnimation = ValueAnimator.ofObject(new ArgbEvaluator(), colorFrom, colorTo);
colorAnimation.addUpdateListener(animator -> {
colorDrawable.setColor((Integer) animator.getAnimatedValue());
ViewCompat.setBackground(viewToAnimateItsBackground, colorDrawable);
});
colorAnimation.setDuration(durationInMs);
colorAnimation.start();
}
}
And in Kotlin:
@JvmStatic
fun animateBetweenColors(viewToAnimateItsBackground: View, colorFrom: Int, colorTo: Int, durationInMs: Int) {
val colorDrawable = ColorDrawable(if (durationInMs > 0) colorFrom else colorTo)
ViewCompat.setBackground(viewToAnimateItsBackground, colorDrawable)
if (durationInMs > 0) {
val colorAnimation = ValueAnimator.ofObject(ArgbEvaluator(), colorFrom, colorTo)
colorAnimation.addUpdateListener { animator: ValueAnimator ->
colorDrawable.color = (animator.animatedValue as Int)
ViewCompat.setBackground(viewToAnimateItsBackground, colorDrawable)
}
colorAnimation.duration = durationInMs.toLong()
colorAnimation.start()
}
}
The documentation on XML powered animations is horrible. I've searched around hours just to animate the background color of a button when pressing... The sad thing is that the animation is only one attribute away: You can use exitFadeDuration
in the selector
:
<selector xmlns:android="http://schemas.android.com/apk/res/android"
android:exitFadeDuration="200">
<item android:state_pressed="true">
<shape android:tint="#3F51B5" />
</item>
<item>
<shape android:tint="#F44336" />
</item>
</selector>
Then just use it as background
for your view. No Java/Kotlin code needed.
Answer is given in many ways. You can also use ofArgb(startColor,endColor)
of ValueAnimator
.
for API > 21:
int cyanColorBg = ContextCompat.getColor(this,R.color.cyan_bg);
int purpleColorBg = ContextCompat.getColor(this,R.color.purple_bg);
ValueAnimator valueAnimator = ValueAnimator.ofArgb(cyanColorBg,purpleColorBg);
valueAnimator.setDuration(500);
valueAnimator.setInterpolator(new LinearInterpolator());
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
relativeLayout.setBackgroundColor((Integer)valueAnimator.getAnimatedValue());
}
});
valueAnimator.start();
I've found that the implementation used by ArgbEvaluator
in the Android source code does best job in transitioning colors. When using HSV, depending on the two colors, the transition was jumping through too many hues for me. But this method's doesn't.
If you are trying to simply animate, use ArgbEvaluator
with ValueAnimator
as suggested here:
ValueAnimator colorAnimation = ValueAnimator.ofObject(new ArgbEvaluator(), colorFrom, colorTo);
colorAnimation.addUpdateListener(new AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animator) {
view.setBackgroundColor((int) animator.getAnimatedValue());
}
});
colorAnimation.start();
However, if you are like me and want to tie your transition with some user gesture or other value passed from an input, the ValueAnimator
is not of much help (unless your are targeting for API 22 and above, in which case you can use the ValueAnimator.setCurrentFraction()
method). When targeting below API 22, wrap the code found in ArgbEvaluator
source code in your own method, as shown below:
public static int interpolateColor(float fraction, int startValue, int endValue) {
int startA = (startValue >> 24) & 0xff;
int startR = (startValue >> 16) & 0xff;
int startG = (startValue >> 8) & 0xff;
int startB = startValue & 0xff;
int endA = (endValue >> 24) & 0xff;
int endR = (endValue >> 16) & 0xff;
int endG = (endValue >> 8) & 0xff;
int endB = endValue & 0xff;
return ((startA + (int) (fraction * (endA - startA))) << 24) |
((startR + (int) (fraction * (endR - startR))) << 16) |
((startG + (int) (fraction * (endG - startG))) << 8) |
((startB + (int) (fraction * (endB - startB))));
}
And use it however you wish.
Based on ademar111190's answer, I have created this method the will pulse the background color of a view between any two colors:
private void animateBackground(View view, int colorFrom, int colorTo, int duration) {
ObjectAnimator objectAnimator = ObjectAnimator.ofObject(view, "backgroundColor", new ArgbEvaluator(), colorFrom, colorTo);
objectAnimator.setDuration(duration);
//objectAnimator.setRepeatCount(Animation.INFINITE);
objectAnimator.addListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animation) {
}
@Override
public void onAnimationEnd(Animator animation) {
// Call this method again, but with the two colors switched around.
animateBackground(view, colorTo, colorFrom, duration);
}
@Override
public void onAnimationCancel(Animator animation) {
}
@Override
public void onAnimationRepeat(Animator animation) {
}
});
objectAnimator.start();
}
add a folder animator into res folder. (the name must be animator). Add an animator resource file. For example res/animator/fade.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<objectAnimator
android:propertyName="backgroundColor"
android:duration="1000"
android:valueFrom="#000000"
android:valueTo="#FFFFFF"
android:startOffset="0"
android:repeatCount="-1"
android:repeatMode="reverse" />
</set>
Inside Activity java file, call this
View v = getWindow().getDecorView().findViewById(android.R.id.content);
AnimatorSet set = (AnimatorSet) AnimatorInflater.loadAnimator(this, R.animator.fade);
set.setTarget(v);
set.start();
Another easy way to achieve this is to perform a fade using AlphaAnimation.
You can use ArgbEvaluatorCompat class above API 11.
implementation 'com.google.android.material:material:1.0.0'
ValueAnimator colorAnim = ValueAnimator.ofObject(new ArgbEvaluatorCompat(), startColor, endColor);
colorAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mTargetColor = (int) animation.getAnimatedValue();
}
});
colorAnim.start();
You can use new Property Animation Api for color animation:
int colorFrom = getResources().getColor(R.color.red);
int colorTo = getResources().getColor(R.color.blue);
ValueAnimator colorAnimation = ValueAnimator.ofObject(new ArgbEvaluator(), colorFrom, colorTo);
colorAnimation.setDuration(250); // milliseconds
colorAnimation.addUpdateListener(new AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animator) {
textView.setBackgroundColor((int) animator.getAnimatedValue());
}
});
colorAnimation.start();
For backward compatibility with Android 2.x use Nine Old Androids library from Jake Wharton.
The getColor
method was deprecated in Android M, so you have two choices:
If you use the support library, you need to replace the getColor
calls with:
ContextCompat.getColor(this, R.color.red);
if you don't use the support library, you need to replace the getColor
calls with:
getColor(R.color.red);
This is the method I use in a Base Activity to change background. I'm using GradientDrawables generated in code, but could be adapted to suit.
protected void setPageBackground(View root, int type){
if (root!=null) {
Drawable currentBG = root.getBackground();
//add your own logic here to determine the newBG
Drawable newBG = Utils.createGradientDrawable(type);
if (currentBG==null) {
if(Build.VERSION.SDK_INT<Build.VERSION_CODES.JELLY_BEAN){
root.setBackgroundDrawable(newBG);
}else{
root.setBackground(newBG);
}
}else{
TransitionDrawable transitionDrawable = new TransitionDrawable(new Drawable[]{currentBG, newBG});
transitionDrawable.setCrossFadeEnabled(true);
if(Build.VERSION.SDK_INT<Build.VERSION_CODES.JELLY_BEAN){
root.setBackgroundDrawable(transitionDrawable);
}else{
root.setBackground(transitionDrawable);
}
transitionDrawable.startTransition(400);
}
}
}
update: In case anyone runs in to same issue I found, for some reason on Android <4.3 using setCrossFadeEnabled(true)
cause a undesirable white out effect so I had to switch to a solid colour for <4.3 using @Roman Minenok ValueAnimator method noted above.
best way is to use ValueAnimator and ColorUtils.blendARGB
ValueAnimator valueAnimator = ValueAnimator.ofFloat(0.0f, 1.0f);
valueAnimator.setDuration(325);
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
float fractionAnim = (float) valueAnimator.getAnimatedValue();
view.setBackgroundColor(ColorUtils.blendARGB(Color.parseColor("#FFFFFF")
, Color.parseColor("#000000")
, fractionAnim));
}
});
valueAnimator.start();
If you want color animation like this,
this code will help you:
ValueAnimator anim = ValueAnimator.ofFloat(0, 1);
anim.setDuration(2000);
float[] hsv;
int runColor;
int hue = 0;
hsv = new float[3]; // Transition color
hsv[1] = 1;
hsv[2] = 1;
anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
hsv[0] = 360 * animation.getAnimatedFraction();
runColor = Color.HSVToColor(hsv);
yourView.setBackgroundColor(runColor);
}
});
anim.setRepeatCount(Animation.INFINITE);
anim.start();
Source: Stackoverflow.com