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。
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
使用这个类:
public class ExpandCollapseExtention {
public static void expand(View view) {
view.setVisibility(View.VISIBLE);
final int widthSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
final int heightSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
view.measure(widthSpec, heightSpec);
ValueAnimator mAnimator = slideAnimator(view, 0, view.getMeasuredHeight());
mAnimator.start();
}
public static void collapse(final View view) {
int finalHeight = view.getHeight();
ValueAnimator mAnimator = slideAnimator(view, finalHeight, 0);
mAnimator.addListener(new Animator.AnimatorListener() {
@Override
public void onAnimationEnd(Animator animator) {
view.setVisibility(View.GONE);
}
@Override
public void onAnimationStart(Animator animation) {
}
@Override
public void onAnimationCancel(Animator animation) {
}
@Override
public void onAnimationRepeat(Animator animation) {
}
});
mAnimator.start();
}
private static ValueAnimator slideAnimator(final View v, int start, int end) {
ValueAnimator animator = ValueAnimator.ofInt(start, end);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
int value = (Integer) valueAnimator.getAnimatedValue();
ViewGroup.LayoutParams layoutParams = v.getLayoutParams();
layoutParams.height = value;
v.setLayoutParams(layoutParams);
}
});
return animator;
}
}
其他回答
你可以使用简单的三行代码来显示动画…
//getting the hiding view by animation
mbinding.butn.setOnClickListener {
val SlideOutLeft = AnimationUtils.loadAnimation(this, R.anim.slide_out_left)
simplelayout.visibility = View.INVISIBLE
simplelayout.startAnimation(SlideOutLeft)
val SlideInRight = AnimationUtils.loadAnimation(applicationContext, R.anim.slide_in_right)
animation1.visibility = View.VISIBLE
animation1.startAnimation(SlideInRight)
}
//again unhide the view animation
mbinding.buttn.setOnClickListener {
val SlideInLeft=AnimationUtils.loadAnimation(this,R.anim.slide_in_left)
//set the layout
simplelayout.visibility=View.VISIBLE
simplelayout.startAnimation(SlideInLeft)
val SlideOutRight=AnimationUtils.loadAnimation(this,R.anim.slide_out_right)
animation1.visibility=View.INVISIBLE
animation1.startAnimation(SlideOutRight)
}
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
当LinearLayout的可见性改变时,你可以通过创建LinearLayout的一个新的子类并覆盖setVisibility()来启动动画来启动正确的动画。考虑一下这样的事情:
public class SimpleViewAnimator extends LinearLayout
{
private Animation inAnimation;
private Animation outAnimation;
public SimpleViewAnimator(Context context)
{
super(context);
}
public void setInAnimation(Animation inAnimation)
{
this.inAnimation = inAnimation;
}
public void setOutAnimation(Animation outAnimation)
{
this.outAnimation = outAnimation;
}
@Override
public void setVisibility(int visibility)
{
if (getVisibility() != visibility)
{
if (visibility == VISIBLE)
{
if (inAnimation != null) startAnimation(inAnimation);
}
else if ((visibility == INVISIBLE) || (visibility == GONE))
{
if (outAnimation != null) startAnimation(outAnimation);
}
}
super.setVisibility(visibility);
}
}
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);
}
});
}
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