FlingAnimationUtils.java 文件源码

private Interpolator getInterpolator(float startGradient, float velocityFactor) {
    if (startGradient != mCachedStartGradient
            || velocityFactor != mCachedVelocityFactor) {
        float speedup = mSpeedUpFactor * (1.0f - velocityFactor);
        mInterpolator = new PathInterpolator(speedup,
                speedup * startGradient,
                mLinearOutSlowInX2, mY2);
        mCachedStartGradient = startGradient;
        mCachedVelocityFactor = velocityFactor;
    }
    return mInterpolator;
}