价值动画师安卓

Question

我试图使用值动画师一个接一个地动画3个图像,但是我无法决定如何在定期间隔后调用三个处理程序.假设有3个图像并且我正在制作三个处理程序来动画它们.但我能够一次带三个图像,但不是一个接一个地定期播放.请帮助

这是我从我的处理程序调用的UpdateListener

public void startAnimation_image(final ImageView aniView) {

    animator = ValueAnimator.ofFloat(0, .8f);
    animator.setDuration(Constants.ANIM_DURATION);

    animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {

        int Low = 10;
        int High = width-150;
        int R = (int) ((Math.random() * (High - Low)) + Low);

        @Override
        public void onAnimationUpdate(ValueAnimator animation) {
            float value = ((Float) (animation.getAnimatedValue())).floatValue();
            aniView.setTranslationX(R);

             Log.e("mscale",150*mScale +"");
             Log.e("value is", value+"");

            aniView.setTranslationY((mDisplaySize.bottom + (150*mScale))*value);

            x_point = aniView.getTranslationX();
            y_point = aniView.getTranslationY();
        }
    });

    animator.addListener(new AnimatorListener() {

        @Override
        public void onAnimationStart(Animator arg0) {

        }
        @Override
        public void onAnimationRepeat(Animator arg0) {

        }
        @Override
        public void onAnimationEnd(Animator arg0) {

            startAnimation();
        }
        @Override
        public void onAnimationCancel(Animator arg0) {

        }
    });

    animator.start();
}

这是我的处理程序之一

@Override
    public void handleMessage(Message msg) {
        super.handleMessage(msg);

        //int viewId = new Random().nextInt(STARS.length);

         id =   getApplicationContext().getResources().getIdentifier(STARS[0], "drawable", 
          getApplicationContext().getPackageName());

         inflate = LayoutInflater.from(StarsActivity2.this);


        img[0].setVisibility(ImageView.VISIBLE);
        img[0].setImageResource(id);

        mAllImageViews.add(img[0]);         

        LayoutParams animationLayout = (LayoutParams) img[0].getLayoutParams();
        img[0].setLayoutParams(animationLayout);
        Log.e("mHandler",img[0]+ "");
        startAnimation_image(img[0]);           
    }
};

有类似的三个处理程序和三个更新听众..请帮助...

Answer 1

offset您可以通过调用将动画延迟毫秒

animation.setStartOffset(offset);

因此，对于持续时间为三个图像ANIM_DURATION，您可以使用以下值按顺序启动它们（可能通过将它们作为参数传递给startAnimation_image()）

// note: this is for illustrative purposes. You should put this in a loop
int firstOffset = 0 * ANIM_DURATION; // starts immediately
int secondOffset = 1 * ANIM_DURATION; // starts after the first animation is finished
int thirdOffset = 2 * ANIM_DURATION; // starts after the second animation is finished
// ... and so on.