在滑动bottomSheet时动画箭头按钮-Java 学习之路

我有一张底片，在滑动时我需要设置动画箭头按钮，指示天气用户向上或向下滑动？
enter image description here

这是我的样品测试，当您在图像中看到的同时滑动底部纸张时，底部的箭头按钮应向上旋转，同时向上滑动，向下滑动按钮应向上旋转 .

谢谢，杰伊

2 回答

萨钦的答案很棒 .

这是另一种解决方案，通过保持底部纸张的先前状态 .

int  previousBottomSheetState = BottomSheetBehavior.STATE_COLLAPSED

  bottom_sheet.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
            @Override
            public void onStateChanged(@NonNull View bottomSheet, int newState) {
                //to prevent rotation of the arrow if the users swipes down or up again, even when its already collapsed or expanded.
                if (newState == BottomSheetBehavior.STATE_EXPANDED && newState != previousBottomSheetState) {
                    //update my bottomsheet state.
                    previousBottomSheetState = BottomSheetBehavior.STATE_EXPANDED;
                    (yourView).animate().rotationXBy(180).start();
                } else if (newState == BottomSheetBehavior.STATE_COLLAPSED && newState != previousBottomSheetState) {
                    previousBottomSheetState = BottomSheetBehavior.STATE_COLLAPSED;
                    (yourView).animate().rotationXBy(180).start();
                }
            }

            @Override
            public void onSlide(@NonNull View bottomSheet, float slideOffset) {
            }
        });

回复于 2024-04-27T13:57:28+08:00

使用 BottomSheetCallback 可以实现 . 您只需要通过回调提供的偏移来旋转视图 . 例如：-

// set callback for changes
bottomSheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
    @Override
    public void onStateChanged(@NonNull View bottomSheet, int newState) {
    }

    @Override
    public void onSlide(@NonNull View bottomSheet, float slideOffset) {
        yourView.setRotation(slideOffset * 180);
    }
});

回复于 2024-04-27T13:57:28+08:00

在滑动bottomSheet时动画箭头按钮

2 回答

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