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
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)
}
其他回答
随着Android 3.0 (Honeycomb)引入的新动画API,创建这样的动画非常简单。
将视图向下滑动一段距离:
view.animate().translationY(distance);
你可以稍后将视图滑回原来的位置,如下所示:
view.animate().translationY(0);
您还可以轻松地组合多个动画。下面的动画会将一个视图按高度向下滑动,同时淡入:
// Prepare the View for the animation
view.setVisibility(View.VISIBLE);
view.setAlpha(0.0f);
// Start the animation
view.animate()
.translationY(view.getHeight())
.alpha(1.0f)
.setListener(null);
然后,您可以将视图淡出,并将其滑回原始位置。我们还设置了一个AnimatorListener,这样我们可以在动画完成后将视图的可见性设置为GONE:
view.animate()
.translationY(0)
.alpha(0.0f)
.setListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
view.setVisibility(View.GONE);
}
});
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);
}
}
使用ObjectAnimator
private fun slideDown(view: View) {
val height = view.height
ObjectAnimator.ofFloat(view, View.TRANSLATION_Y, 0f, height.toFloat()).apply {
duration = 1000
start()
}
}
private fun slideUp(view: View) {
val height = view.height
ObjectAnimator.ofFloat(view, View.TRANSLATION_Y, height.toFloat(), 0f)).apply {
duration = 1000
start()
}
}
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
}
Suragch用科特林语回答。这对我很管用。
class MainActivity : AppCompatActivity() {
var isUp: Boolean = false
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
var myView: View = findViewById(R.id.my_view)
var myButton: Button = findViewById(R.id.my_button)
//Initialize as invisible
myView.visibility = View.INVISIBLE
myButton.setText("Slide up")
isUp = false
}
fun View.slideUp(duration: Int = 500){
visibility = View.VISIBLE
val animate = TranslateAnimation(0f, 0f, this.height.toFloat(), 0f)
animate.duration = duration.toLong()
animate.fillAfter = true
this.startAnimation(animate)
}
fun View.slideDown(duration: Int = 500) {
visibility = View.VISIBLE
val animate = TranslateAnimation(0f, 0f, 0f, this.height.toFloat())
animate.duration = duration.toLong()
animate.fillAfter = true
this.startAnimation(animate)
}
fun onSlideViewButtonClick(view: View){
if(isUp){
my_view.slideDown()
my_button.setText("Slide Up")
}
else{
my_view.slideUp()
my_button.setText("Slide Down")
}
isUp = !isUp
}
}