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);
    }
}

其中一个简单的方法是:

containerView.setLayoutTransition(LayoutTransition())
containerView.layoutTransition.enableTransitionType(LayoutTransition.CHANGING)

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)

            }

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()
    }
}

这里有另一种方法来处理多个按钮(在这个例子中是ImageView)

MainActivity.java

findViewById(R.id.arrowIV).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                if (strokeWidthIV.getAlpha() == 0f) {
                    findViewById(R.id.arrowIV).animate().rotationBy(180);

                    strokeWidthIV.animate().translationXBy(-120 * 4).alpha(1f);
                    findViewById(R.id.colorChooseIV).animate().translationXBy(-120 * 3).alpha(1f);
                    findViewById(R.id.saveIV).animate().translationXBy(-120 * 2).alpha(1f);
                    findViewById(R.id.clearAllIV).animate().translationXBy(-120).alpha(1f);
                } else {
                    findViewById(R.id.arrowIV).animate().rotationBy(180);

                    strokeWidthIV.animate().translationXBy(120 * 4).alpha(0f);
                    findViewById(R.id.colorChooseIV).animate().translationXBy(120 * 3).alpha(0f);
                    findViewById(R.id.saveIV).animate().translationXBy(120 * 2).alpha(0f);
                    findViewById(R.id.clearAllIV).animate().translationXBy(120).alpha(0f);
                }
            }
        });

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context=".activity.MainActivity">

 <ImageView
     android:id="@+id/strokeWidthIV"
     android:layout_width="48dp"
     android:layout_height="48dp"
     android:layout_margin="8dp"
     android:alpha="0"
     android:contentDescription="Clear All"
     android:padding="4dp"
     android:scaleType="fitXY"
     android:src="@drawable/ic_edit"
     app:layout_constraintEnd_toEndOf="parent"
     app:layout_constraintTop_toTopOf="parent"
     tools:ignore="HardcodedText" />

 <ImageView
     android:id="@+id/colorChooseIV"
     android:layout_width="48dp"
     android:layout_height="48dp"
     android:layout_margin="8dp"
     android:alpha="0"
     android:contentDescription="Clear All"
     android:padding="4dp"
     android:scaleType="fitXY"
     android:src="@drawable/ic_palette"
     app:layout_constraintEnd_toEndOf="parent"
     app:layout_constraintTop_toTopOf="parent"
     tools:ignore="HardcodedText" />

 <ImageView
     android:id="@+id/saveIV"
     android:layout_width="48dp"
     android:layout_height="48dp"
     android:layout_margin="8dp"
     android:alpha="0"
     android:contentDescription="Clear All"
     android:padding="4dp"
     android:scaleType="fitXY"
     android:src="@drawable/ic_save"
     app:layout_constraintEnd_toEndOf="parent"
     app:layout_constraintTop_toTopOf="parent"
     tools:ignore="HardcodedText" />

 <ImageView
     android:id="@+id/clearAllIV"
     android:layout_width="48dp"
     android:layout_height="48dp"
     android:layout_margin="8dp"
     android:alpha="0"
     android:contentDescription="Clear All"
     android:padding="4dp"
     android:scaleType="fitXY"
     android:src="@drawable/ic_clear_all"
     app:layout_constraintEnd_toEndOf="parent"
     app:layout_constraintTop_toTopOf="parent"
     tools:ignore="HardcodedText" />

 <ImageView
     android:id="@+id/arrowIV"
     android:layout_width="48dp"
     android:layout_height="48dp"
     android:layout_margin="8dp"
     android:contentDescription="Arrow"
     android:padding="4dp"
     android:scaleType="fitXY"
     android:src="@drawable/ic_arrow"
     app:layout_constraintEnd_toEndOf="parent"
     app:layout_constraintTop_toTopOf="parent"
     tools:ignore="HardcodedText" />
</androidx.constraintlayout.widget.ConstraintLayout>

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
}