Develop Reference

How to make a simple timerAnimation in android studio?

I searched a lot for how to make simple TimerAnimator like Value animator
can anyone tell me how to do it very simply
this is the one for value animator
ValueAnimator timeAnimator=ValueAnimator.ofInt(1,10);
timeAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator animation) {
int currentvalue= (int) animation.getAnimatedValue();
tttt.setText(String.valueOf(currentvalue));
}
});
timeAnimator.setDuration(20000);
timeAnimator.start();

Android ArgbEvaluator calculate fraction

I've a little difficult in using ArgbEvaluator object.
I want to change the color of view from one color to another color in specific duration.So I write this code,it works well.
ValueAnimator animator = ValueAnimator.ofArgb(Color.RED,Color.BLUE);
animator.setDuration(5000);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator animation) {
int color = (int) animation.getAnimatedValue();
view.setBackgroundColor(color);
}
});
animator.start();
But I want to use ArgbEvaluator to animate like that.
public void setColor(fraction){
int color = evaluator.evaluate(fraction,startColor,endColor);
view.setBackgroundColor(color);
}
The above setColor method will be called agian and again for specific duration(eg-5000ms).
Here is my problem.
I don't know how to calculate fraction to change color within specific duration.
I want to know the calculation formula of fraction.Thanks.

Is it possible to use one ValueAnimator or ObjectAnimator to animate multiple values in a Matrix?

I'm trying to change the X and Y scales of a Matrix object in conjunction with the changing shape of an ImageView to make it seem like the ImageView is merely a mask.
So in order to do that, I would change the scale of the ImageView's Matrix to reciprocate the changing scale of the ImageView itself.
So far, I'm using a single ValueAnimator to change the X scale of the Matrix and it worked:
final ValueAnimator xScaleIterationMatrix = ValueAnimator.ofFloat((1/xScaleSrcToDst)*initMatDstVals[0], initMatDstVals[0]);
final Matrix mat = initMatrixDst;
xScaleIterationMatrix.setDuration(animDurationCommon);
xScaleIterationMatrix.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
mat.setScale((float)xScaleIterationMatrix.getAnimatedValue(), initMatDstVals[4]);
toReplace.interfaceImageView().setImageMatrix(mat);
}
});
xScaleIterationMatrix.start();
But that's just one ValueAnimator, and only one property (scaleX) of the Matrix.
I was thinking of using 2 ValueAnimators (to change the scaleX and scaleY [while setting the matrix in the latter]) to do that, but I wish for something simpler.
Can I use an ObjectAnimator for this task?
EDIT: The sample code for the 2 ValueAnimators proposal:
final ValueAnimator xScaleIterationMatrix = ValueAnimator.ofFloat(xScaleSrcToDst * initMatSrcVals[0], initMatSrcVals[0]);
xScaleIterationMatrix.setDuration(animDurationCommon);
xScaleIterationMatrix.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
resultXScale = (float)xScaleIterationMatrix.getAnimatedValue();
}
});
xScaleIterationMatrix.start();
final ValueAnimator yScaleIterationMatrix = ValueAnimator.ofFloat(yScaleSrcToDst * initMatSrcVals[4], initMatSrcVals[4]);
yScaleIterationMatrix.setDuration(animDurationCommon);
yScaleIterationMatrix.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
resultYScale = (float)yScaleIterationMatrix.getAnimatedValue();
mat.setScale(resultXScale, resultYScale);
source.interfaceImageView().setImageMatrix(mat);
}
});
yScaleIterationMatrix.start();

Android: how to use ValueAnimator

I want to do a translate animation using this following
public static void move(TextView view){
ValueAnimator va = ValueAnimator.ofFloat(0f, 3f);
int mDuration = 3000; //in millis
va.setDuration(mDuration);
va.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
public void onAnimationUpdate(ValueAnimator animation) {
}
});
va.setRepeatCount(5);
va.start();
}
But I don't know how to use onAnimationUpdate method.
Can anyone help please?

If you really, really, really want to use ValueAnimator for animating translation of the View you can do it this way (finishing your example, assuming you meant translationX.
Bare in mind that you're animating translation from 0px to 3px, so you probably won't see much difference.
fun move(view: TextView) {
val va = ValueAnimator.ofFloat(0f, 3f)
va.duration = 3000 //in millis
va.addUpdateListener { animation -> view.translationX = animation.animatedValue as Float }
va.repeatCount = 5
va.start()
}

ValueAnimator is a great tool for making animations. Usually we have three steps:
Step 1- Create your ValueAnimator class by
ValueAnimator animator = ValueAnimator.ofFloat(start value, end value);
Step 2- Adding one update listener and overriding at least onAnimationUpdate() function
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
float value = (float) animator.getAnimatedValue();
//this value should be used to update properties of views.
//just don't forget to run invalidate function of your views
// to redraw them.
}
});
Step 3-
animator.start();

Android - Animate margin / change position of multiple views at once

I have a RelativeLayout with 4 Button side by side. On certain event I wish to change position / Change margin of all four Button with animation.
I am currently doing it with following code
final RelativeLayout.MarginLayoutParams params1 = (RelativeLayout.MarginLayoutParams) button1.getLayoutParams();
final RelativeLayout.MarginLayoutParams params2 = (RelativeLayout.MarginLayoutParams) button2.getLayoutParams();
final RelativeLayout.MarginLayoutParams params3 = (RelativeLayout.MarginLayoutParams) button3.getLayoutParams();
final RelativeLayout.MarginLayoutParams params4 = (RelativeLayout.MarginLayoutParams) button4.getLayoutParams();
final RelativeLayout.MarginLayoutParams params5 = (RelativeLayout.MarginLayoutParams) button5.getLayoutParams();
ValueAnimator animator1 = ValueAnimator.ofInt(params1.rightMargin, (deviceWidth - availableWithForTabs + spaceForTabs));
ValueAnimator animator2 = ValueAnimator.ofInt(params2.rightMargin, dpToPx(78));
ValueAnimator animator3 = ValueAnimator.ofInt(params3.rightMargin, dpToPx(52));
ValueAnimator animator4 = ValueAnimator.ofInt(params4.rightMargin, dpToPx(26));
ValueAnimator animator5 = ValueAnimator.ofInt(params5.rightMargin, dpToPx(0));
animator5.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
params5.rightMargin = (Integer) valueAnimator.getAnimatedValue();
}
});
animator5.setDuration(150);
animator5.start();
animator4.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
params4.rightMargin = (Integer) valueAnimator.getAnimatedValue();
}
);
animator4.setDuration(150);
animator4.start();
animator3.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
params3.rightMargin = (Integer) valueAnimator.getAnimatedValue();
}
});
animator3.setDuration(150);
animator3.start();
animator2.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
params2.rightMargin = (Integer) valueAnimator.getAnimatedValue();
}
});
animator2.setDuration(150);
animator2.start();
animator1.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
params1.rightMargin = (Integer) valueAnimator.getAnimatedValue();
button1.requestLayout();
}
});
animator1.setDuration(150);
animator1.start();
I feel above code is too much to animate margin change for 5 button. Can any one tell me a better way of doing this? or what other options i have? I have to support sdk 16 +

You might want to rethink your design, using ViewPropertyAnimator could save you you a lot lines of code and is very readable/maintainable.
Using ViewPropertyAnimator is pretty simple :
Button button1 = (Button) findViewById(R.id.button1);
button1.animate()
.translationX(toX)
.translationY(toY)
.setDuration(milliseconds); // add more if you
// like (alpha, startDelay)
// check the docs for available methods
The animation always starts at the current position of the View.
For the sake of cleaner code why dont you try something like this :
Write your own Animation Method that takes a View(in your case a Button), and all the values that you need as parameters (minimal implementation of moving a view on the x and y axis) :
private void animateView(View view, float toX, float toY, int duration) {
view.animate()
.translationX(toX)
.translationY(toY)
.setDuration(duration);
}
Then you can simply call this method on your buttons to animate them individually f.e. :
animateView(button1, 5.0f, 2.5f, 150);
animateView(button2, 2.5f, 1.0f, 150);
of course 5.0f, 2.5f etc are only fictional numbers, you'd have to fill in where you want to move the Views yourself.
Extra Suggestion : It is always nice to use Interpolators to make your animation more life like f. e. :
view.animate()
.translationX(...)
.translationY(...)
.setInterpolator(new AccelerateDecelerateInterpolator())
.setDuration(...);
If this was not thorough enough or anything is unclear let me know.
UPDATE :
If you want to set a listener you can either implement the Animator.AnimatorListener Interface in your class like this :
public class yourClass extends AppCompatActivity implements Animator.AnimatorListener {...
Then you are forced to implement the following methods :
#Override
public void onAnimationEnd(Animator animation) {
// here you can call stuff that should happen when the animation ends,
// f.e. start the next animation
// the method names explain themselves
}
#Override
public void onAnimationStart(Animator animation) {
}
#Override
public void onAnimationCancel(Animator animation) {
}
#Override
public void onAnimationRepeat(Animator animation) {
}
Then all you have to do is add another line to your animateView method :
view.animate()
...
...
.setListener(this);
Or you can do it in an anonymous inner class like this :
view.animate()
...
...
.setListener(new Animator.AnimatorListener() {
#Override
public void onAnimationEnd(Animator animation) {
}
// same methods as above ...
...
)};

Why don't you just animate the whole relative layout containing the 4 buttons.
Also I suggest to use View.animate method
public ViewPropertyAnimator animate ()
Added in API level 12
This method returns a ViewPropertyAnimator object, which can be used to animate specific properties on this View.
Returns
ViewPropertyAnimator The ViewPropertyAnimator associated with this View.