Question

我想在我的应用中使用Reveal Effect。我开始了解它是如何实现的。我从Andoid Developer Blog获得了信息。

但是当我在我的代码中更新它时，它没有显示任何效果。

我也尝试使用Demo given by Google来展示显露效果。但它也没有显示出效果。如果我需要添加任何权限，或者我正在做什么错误？

我的动画师如下：

View button = rootView.findViewById(R.id.button);
    final View shape = rootView.findViewById(R.id.circle);
    shape.setClipToOutline(false);
    shape.setVisibility(View.INVISIBLE);
    // Set a listener to reveal the view when clicked.
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            if(isShowing==false){
                // previously invisible view

                // get the center for the clipping circle
                int cx = (shape.getLeft() + shape.getRight()) / 2;
                int cy = (shape.getTop() + shape.getBottom()) / 2;

                // get the final radius for the clipping circle
                int finalRadius = Math.max(shape.getWidth(), shape.getHeight());

                // create the animator for this view (the start radius is zero)
                Animator anim =
                        ViewAnimationUtils.createCircularReveal(shape, cx, cy, 0, finalRadius);

                // make the view visible and start the animation
                shape.setVisibility(View.VISIBLE);
                anim.setDuration(4000);
                anim.start();
            }else{

                // get the center for the clipping circle
                int cx = (shape.getLeft() + shape.getRight()) / 2;
                int cy = (shape.getTop() + shape.getBottom()) / 2;

                // get the initial radius for the clipping circle
                int initialRadius = shape.getWidth();

                // create the animation (the final radius is zero)
                Animator anim =
                        ViewAnimationUtils.createCircularReveal(shape, cx, cy, initialRadius, 0);

                // make the view invisible when the animation is done
                anim.addListener(new AnimatorListenerAdapter() {
                    @Override
                    public void onAnimationEnd(Animator animation) {
                        super.onAnimationEnd(animation);
                        shape.setVisibility(View.INVISIBLE);
                    }
                });

                anim.setDuration(4000);
                // start the animation
                anim.start();
            }

            isShowing = !isShowing;

    }
    });

请告诉我如何达到这个效果。

Answer 1

并非Lollipop引入的所有东西都被移植了。揭示，波纹和高度是一些例子。主要原因是其中一些很大程度上依赖于新UI Thread引入的whit ART。您可以在最底层的常见问题部分找到更多信息here

为什么显示效果不按开发人员博客工作

1 个答案: