我有一个线性布局,我想显示或隐藏与动画,推动布局向上或向下每当我改变其可见性。

我在那里看过一些样品,但没有一个适合我的需要。

我已经为动画创建了两个xml文件,但我不知道当我改变线性布局的可见性时如何启动它们。


当前回答

最简单的解决方案:在持有视图的容器上设置android:animateLayoutChanges="true"。

如果你有一个如下所示的布局,这个容器中所有视图的可见性变化都将自动动画化。

<LinearLayout android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:animateLayoutChanges="true"
    >

    <Views_which_change_visibility>

</LinearLayout>

你可以在动画布局变化- Android开发者上找到更多细节

其他回答

从ashakirov的回答为Kotlin用户

 val transition: Transition = Slide(Gravity.BOTTOM)
                transition.duration = 600
                transition.addTarget(you_parent_layout_id)
TransitionManager.beginDelayedTransition(rootLayoutId, transition)
                yourViewIdToHide.visibility = if (yourViewIdToHide.isShown) View.GONE else View.VISIBLE
if (filter_section.getVisibility() == View.GONE) {
    filter_section.animate()
            .translationY(filter_section.getHeight()).alpha(1.0f)
            .setListener(new AnimatorListenerAdapter() {
                @Override
                public void onAnimationStart(Animator animation) {
                    super.onAnimationStart(animation);
                    filter_section.setVisibility(View.VISIBLE);
                    filter_section.setAlpha(0.0f);
                }
            });
} else {
    filter_section.animate()
            .translationY(0).alpha(0.0f)
            .setListener(new AnimatorListenerAdapter() {
                @Override
                public void onAnimationEnd(Animator animation) {
                    super.onAnimationEnd(animation);
                    filter_section.setVisibility(View.GONE);
                }
            });
}

这是我的解决方案。只需要获取视图的引用并调用这个方法:

public static void animateViewFromBottomToTop(final View view){

    view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

        @Override
        public void onGlobalLayout() {

            view.getViewTreeObserver().removeOnGlobalLayoutListener(this);

            final int TRANSLATION_Y = view.getHeight();
            view.setTranslationY(TRANSLATION_Y);
            view.setVisibility(View.GONE);
            view.animate()
                .translationYBy(-TRANSLATION_Y)
                .setDuration(500)
                .setStartDelay(200)
                .setListener(new AnimatorListenerAdapter() {

                    @Override
                    public void onAnimationStart(final Animator animation) {

                        view.setVisibility(View.VISIBLE);
                    }
                })
                .start();
        }
    });
}

不需要做任何其他事情=)

通过Kotlin扩展,你可以这样使用:

enum class SlideDirection{
    UP,
    DOWN,
    LEFT,
    RIGHT
}

enum class SlideType{
    SHOW,
    HIDE
}

fun View.slideAnimation(direction: SlideDirection, type: SlideType, duration: Long = 250){
    val fromX: Float
    val toX: Float
    val fromY: Float
    val toY: Float
    val array = IntArray(2)
    getLocationInWindow(array)
    if((type == SlideType.HIDE && (direction == SlideDirection.RIGHT || direction == SlideDirection.DOWN)) ||
        (type == SlideType.SHOW && (direction == SlideDirection.LEFT || direction == SlideDirection.UP))   ){
        val displayMetrics = DisplayMetrics()
        val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
        windowManager.defaultDisplay.getMetrics(displayMetrics)
        val deviceWidth = displayMetrics.widthPixels
        val deviceHeight = displayMetrics.heightPixels
        array[0] = deviceWidth
        array[1] = deviceHeight
    }
    when (direction) {
        SlideDirection.UP -> {
            fromX = 0f
            toX = 0f
            fromY = if(type == SlideType.HIDE) 0f else (array[1] + height).toFloat()
            toY = if(type == SlideType.HIDE) -1f * (array[1] + height)  else 0f
        }
        SlideDirection.DOWN -> {
            fromX = 0f
            toX = 0f
            fromY = if(type == SlideType.HIDE) 0f else -1f * (array[1] + height)
            toY = if(type == SlideType.HIDE) 1f * (array[1] + height)  else 0f
        }
        SlideDirection.LEFT -> {
            fromX = if(type == SlideType.HIDE) 0f else 1f * (array[0] + width)
            toX = if(type == SlideType.HIDE) -1f * (array[0] + width) else 0f
            fromY = 0f
            toY = 0f
        }
        SlideDirection.RIGHT -> {
            fromX = if(type == SlideType.HIDE) 0f else -1f * (array[0] + width)
            toX = if(type == SlideType.HIDE) 1f * (array[0] + width) else 0f
            fromY = 0f
            toY = 0f
        }
    }
    val animate = TranslateAnimation(
        fromX,
        toX,
        fromY,
        toY
    )
    animate.duration = duration
    animate.setAnimationListener(object: Animation.AnimationListener{
        override fun onAnimationRepeat(animation: Animation?) {

        }

        override fun onAnimationEnd(animation: Animation?) {
            if(type == SlideType.HIDE){
                visibility = View.INVISIBLE
            }
        }

        override fun onAnimationStart(animation: Animation?) {
            visibility = View.VISIBLE
        }

    })
    startAnimation(animate)
}

扩展示例:

view.slideAnimation(SlideDirection.UP, SlideType.HIDE)//to make it disappear through top of the screen
view.slideAnimation(SlideDirection.DOWN, SlideType.SHOW)//to make it reappear from top of the screen

view.slideAnimation(SlideDirection.DOWN, SlideType.HIDE)//to make it disappear through bottom of the screen
view.slideAnimation(SlideDirection.UP, SlideType.SHOW)//to make it reappear from bottom of the screen

如果你想同时显示/隐藏多个视图,你可以使用TransitionSet(因为你不能同时播放2个“单个”过渡)

fun slideTopBottomVisibility(topLayout: View, bottomLayout: View, show: Boolean) {
    val topTransition: Transition = Slide(Gravity.TOP)
    topTransition.duration = 600
    topTransition.addTarget(topLayout)

    val bottomTransition: Transition = Slide(Gravity.BOTTOM)
    bottomTransition.duration = 600
    bottomTransition.addTarget(bottomLayout)

    val transitionSet = TransitionSet()
    transitionSet.addTransition(topTransition)
    transitionSet.addTransition(bottomTransition)

    TransitionManager.beginDelayedTransition(topLayout.parent as ViewGroup, transitionSet)
    topLayout.visibility = if (show) View.VISIBLE else View.GONE
    bottomLayout.visibility = if (show) View.VISIBLE else View.GONE
}