/
BallSizeAnimator.java
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/
BallSizeAnimator.java
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package com.github.glomadrian.loadingballs.animator;
import android.animation.ValueAnimator;
import android.graphics.Path;
import android.view.animation.AccelerateDecelerateInterpolator;
import com.github.glomadrian.loadingballs.Ball;
import java.util.ArrayList;
import java.util.List;
/**
* @author Adrián García Lomas
*/
public class BallSizeAnimator extends AbstractBallAnimator {
private int duration;
private float offset;
private Path path;
private float minBallSize;
private float maxBallSize;
private List<ValueAnimator> animators;
public BallSizeAnimator(Path path, int duration, float minBallSize, float maxBallSize) {
this.duration = duration;
this.path = path;
this.minBallSize = minBallSize;
this.maxBallSize = maxBallSize;
init();
}
private void init() {
animators = new ArrayList<>();
}
public void start() {
animators.clear();
for (int i = 0; i < balls.size(); i++) {
createBallAnimatorAndStart(balls.get(i), 300 * i);
}
}
@Override
public void stop() {
for (ValueAnimator animator : animators) {
animator.cancel();
}
}
@Override
public void restart() {
stop();
start();
}
private void createBallAnimatorAndStart(Ball ball, int startDelay) {
ValueAnimator valueAnimator = new ValueAnimator();
valueAnimator.setFloatValues(minBallSize, maxBallSize);
valueAnimator.setInterpolator(new AccelerateDecelerateInterpolator());
valueAnimator.setDuration(duration);
valueAnimator.addUpdateListener(new BallUpdateListener(ball));
valueAnimator.setRepeatMode(ValueAnimator.REVERSE);
valueAnimator.setRepeatCount(ValueAnimator.INFINITE);
valueAnimator.setStartDelay(startDelay);
animators.add(valueAnimator);
valueAnimator.start();
}
private class BallUpdateListener implements ValueAnimator.AnimatorUpdateListener {
private Ball ball;
public BallUpdateListener(Ball ball) {
this.ball = ball;
}
@Override
public void onAnimationUpdate(ValueAnimator animation) {
float value = (float) animation.getAnimatedValue();
ball.setSize((int) value);
}
}
}