FloatingView.java 文件源码

AnimationTask() {
    if (mIsAnimationLocked)
        throw new RuntimeException("Returning to user's finger. Avoid animations while mIsAnimationLocked flag is set.");
    mDestX = calculateX();
    mDestY = calculateY();
    mDynamicUpdate = null;

    setAnimationFinishedListener(new AnimationFinishedListener() {
        @Override
        public void onAnimationFinished() {
            adjustInactivePosition();
        }
    });

    float velocityX = calculateVelocityX();
    float velocityY = calculateVelocityY();
    mTension += Math.sqrt(sqr(velocityX) + sqr(velocityY)) / 200;
    mInterpolator = new OvershootInterpolator(mTension);

    mCurrentPosX = mDestX;
    mCurrentPosY = mDestY;
}