我在视图上创建了向上滑动动画,我在onAnimationEnd上再次重复此动画,但是我的onAnimationEnd触发了两次,我在onAnimationEnd处用计数器检查了它,我将发布代码,您可以检查onAnimationEnd中的计数器在处增加两次同时,我在onAnimationEnd方法中再次启动动画,请指导我做错了什么?
private Animation animSlideUp;
animSlideUp = AnimationUtils.loadAnimation(getActivity(), R.anim.slide_up);
// set animation listener
animSlideUp.setAnimationListener(this);
animSlideUp.setDuration(500);
animSlideUp.setStartOffset(5000);
tickerView.startAnimation(animSlideUp);
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
if (animation == animSlideUp) {
ticker_counter++;
Log.e("onAnimationEnd=", "ticker_counter="+ticker_counter);
tickerView.startAnimation(animSlideUp);
}
}
@Override
public void onAnimationRepeat(Animation animation) {
}
slide_up.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:fillAfter="true" >
<scale
android:duration="500"
android:fromXScale="1.0"
android:fromYScale="1.0"
android:interpolator="@android:anim/linear_interpolator"
android:toXScale="1.0"
android:toYScale="0.0"/>
</set>
LOGCAT
11-19 17:06:54.375 E/onAnimationEnd=﹕ ticker_counter=1
11-19 17:06:54.392 E/onAnimationEnd=﹕ ticker_counter=2
11-19 17:06:59.912 E/onAnimationEnd=﹕ ticker_counter=3
11-19 17:06:59.928 E/onAnimationEnd=﹕ ticker_counter=4
11-19 17:07:05.453 E/onAnimationEnd=﹕ ticker_counter=5
11-19 17:07:05.470 E/onAnimationEnd=﹕ ticker_counter=6
11-19 17:07:10.991 E/onAnimationEnd=﹕ ticker_counter=7
11-19 17:07:11.008 E/onAnimationEnd=﹕ ticker_counter=8
最佳答案
如果您希望动画播放一次,则必须删除tickerView.startAnimation(animSlideUp);。来自onAnimationEnd方法。
避免使用xml动画,这在Java代码中要容易得多。
如果要为两个属性设置动画:
PropertyValuesHolder pvhX = PropertyValuesHolder.ofFloat("scaleX", 1.0f, 0);
PropertyValuesHolder pvhY = PropertyValuesHolder.ofFloat("scaleY", 1.0f, 0);
ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(tickerView, pvhX, pvhY);
animator.setDuration(500);
animator.start();
在您的情况下,您仅将scaleY值从1.0更改为0,因此请使用以下命令:
ObjectAnimator animator = ObjectAnimator.ofFloat(tickerView, "scaleY",0);
animator.setDuration(500);
//To repeat twice if you want to
animator.setRepeatCount(1);
animator.start();
默认情况下使用LinearInterpolator。
每5秒重复一次
final ObjectAnimator animator = ObjectAnimator.ofFloat(tickerView, "scaleY", 0);
animator.setDuration(500);
animator.addListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animation) {
}
@Override
public void onAnimationEnd(Animator animation) {
ticker_counter++;
animation.setStartDelay(5000);
animator.start();
}
@Override
public void onAnimationCancel(Animator animation) {
}
@Override
public void onAnimationRepeat(Animator animation) {
}
});
animator.start();