WaveView.java 文件源码

public void startDropAnimation() {
    // show dropBubble again
    mDisappearCircleAnimator = ValueAnimator.ofFloat(1.f, 1.f);
    mDisappearCircleAnimator.setDuration(1);
    mDisappearCircleAnimator.start();

    mDropCircleAnimator = ValueAnimator.ofFloat(500 * (mWidth / 1440.f), mMaxDropHeight);
    mDropCircleAnimator.setDuration(DROP_CIRCLE_ANIMATOR_DURATION);
    mDropCircleAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
        @Override
        public void onAnimationUpdate(ValueAnimator animation) {
            mCurrentCircleCenterY = (float) animation.getAnimatedValue();
            postInvalidateOnAnimation();
        }
    });
    mDropCircleAnimator.setInterpolator(new AccelerateDecelerateInterpolator());
    mDropCircleAnimator.start();

    mDropVertexAnimator = ValueAnimator.ofFloat(0.f, mMaxDropHeight - mDropCircleRadius);
    mDropVertexAnimator.setDuration(DROP_VERTEX_ANIMATION_DURATION);
    mDropVertexAnimator.addUpdateListener(mAnimatorUpdateListener);
    mDropVertexAnimator.start();

    mDropBounceVerticalAnimator = ValueAnimator.ofFloat(0.f, 1.f);
    mDropBounceVerticalAnimator.setDuration(DROP_BOUNCE_ANIMATOR_DURATION);
    mDropBounceVerticalAnimator.addUpdateListener(mAnimatorUpdateListener);
    mDropBounceVerticalAnimator.setInterpolator(new DropBounceInterpolator());
    mDropBounceVerticalAnimator.setStartDelay(DROP_VERTEX_ANIMATION_DURATION);
    mDropBounceVerticalAnimator.start();

    mDropBounceHorizontalAnimator = ValueAnimator.ofFloat(0.f, 1.f);
    mDropBounceHorizontalAnimator.setDuration(DROP_BOUNCE_ANIMATOR_DURATION);
    mDropBounceHorizontalAnimator.addUpdateListener(mAnimatorUpdateListener);
    mDropBounceHorizontalAnimator.setInterpolator(new DropBounceInterpolator());
    mDropBounceHorizontalAnimator.setStartDelay(
            (long) (DROP_VERTEX_ANIMATION_DURATION + DROP_BOUNCE_ANIMATOR_DURATION * 0.25));
    mDropBounceHorizontalAnimator.start();
}