如何实现 Android Lollipop Curved Motion API？

Question

我正在尝试实现曲线运动效果，根据 http://developer.android.com/training/material/animations.html#CurvedMotion

这是我的代码，它只是使我的视图从开始坐标到结束坐标呈线性动画 - 没有曲线。我错过了什么？

    HomeView homeView = (HomeFragment) adapter.getFragmentAtPosition(MainTab.HOME.getPositionId());
    //ending x co-ordinates
    float x1 = fab.getX();
    float y1 = fab.getY();

    //ending x co-ordinates
    float x3 = homeView.getCenterXofStatusCard(fab);
    float y3 = homeView.getCenterYofStatusCard(fab);

    final Path path = new Path();
    path.moveTo(x1, y1);

    final float x2 = (x3 + x1) / 2;
    final float y2 = (y3 + y1) / 2;
    path.cubicTo(x1, y1, x2, y2, x3, y3);

    ObjectAnimator anim = ObjectAnimator.ofFloat(fab, View.X, View.Y, path);
    anim.start();

Answer 1

我使用的是生成直线贝塞尔曲线的坐标。这里有更好的坐标来创建曲线。

        path.moveTo(x1, y1);
        final float x2 = (x1 + x3) / 2;
        final float y2 = y1;

        path.quadTo(x2, y2, x3, y3);

如何实现 Android Lollipop Curved Motion API？

How to implement Android Lollipop Curved Motion APIs?

android

android-animation

material-design