Animate ProgressBar update in Android

I used android Animation for this:

public class ProgressBarAnimation extends Animation{    private ProgressBar progressBar;    private float from;    private float  to;    public ProgressBarAnimation(ProgressBar progressBar, float from, float to) {        super();        this.progressBar = progressBar;        this.from = from;        this.to = to;    }    @Override    protected void applyTransformation(float interpolatedTime, Transformation t) {        super.applyTransformation(interpolatedTime, t);        float value = from + (to - from) * interpolatedTime;        progressBar.setProgress((int) value);    }}

and call it like so:

ProgressBarAnimation anim = new ProgressBarAnimation(progress, from, to);anim.setDuration(1000);progress.startAnimation(anim);

Note: if from and to value are too low to produce smooth animation just multiply them by a 100 or so. If you do so, don't forget to multiply setMax(..) as well.

I use an ObjectAnimator

private ProgressBar progreso;private ObjectAnimator progressAnimator;progreso = (ProgressBar)findViewById(R.id.progressbar1);progressAnimator = ObjectAnimator.ofInt(progreso, "progress", 0,1);progressAnimator.setDuration(7000);progressAnimator.start();

The simplest way, using ObjectAnimator (both Java and Kotlin):

ObjectAnimator.ofInt(progressBar, "progress", progressValue)    .setDuration(300)    .start();

where progressValue is integer within range 0-100 (the upper limit is set to 100 by default but you can change it with Progressbar#setMax() method)

You can also change the way how values are changing by setting different interpolator with setInterpolator() method. Here is visualization of different interpolators: https://www.youtube.com/watch?v=6UL7PXdJ6-E