动画旋转android

Question

有没有办法在一个动画中向下和向上旋转像亨德尔这样的图像 像这样animation is here what i want like 3d view..

Answer 1

答案很简单，您必须设置视图的轴心，以便在旋转时可以按轴旋转视图。 （在您的情况下，此代码将保持视图底部相同并为视图顶部设置动画，就像您在视频中显示的那样）

根据图像，如果杠杆底部框是图像高度的25％，则必须计算图像的轴旋转25％。

View v = findViewById(R.id.animate_view);
    v.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(final View v) {
            int percentageHeightOfBox = 25;
            int height = v.getMeasuredHeight();
            v.setPivotX(v.getMeasuredWidth() / 2);
            v.setPivotY(height - ((height * percentageHeightOfBox) / 100));
            ValueAnimator animator = ValueAnimator.ofFloat(0.0f, 90f);
            animator.setDuration(1000);
            animator.setRepeatCount(ObjectAnimator.INFINITE);
            animator.setRepeatMode(ObjectAnimator.REVERSE);
            animator.setInterpolator(new AccelerateDecelerateInterpolator());
            animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                @Override
                public void onAnimationUpdate(ValueAnimator animation) {
                    float rotate = Float.parseFloat(animation.getAnimatedValue().toString());
                    v.setRotationX(rotate);
                }
            });
            animator.start();
        }
    });

Answer 2

试试这个。

ObjectAnimator animation = ObjectAnimator.ofFloat(yourImageView, "rotationX", 0.0f, 90f);
        animation.setDuration(1000);
        animation.setRepeatCount(ObjectAnimator.INFINITE);
        animation.setRepeatMode(ObjectAnimator.REVERSE);
        animation.setInterpolator(new AccelerateDecelerateInterpolator());
        animation.start();