动画，当一个view.visibility（已消失）和另一个视图占用空格时，请消除眨眼

Question

我正在处理动画，而我是新手。我在XML文件中有此结构：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:orientation="vertical">

    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:focusable="true"
        android:orientation="vertical"
        android:padding="10dp"
        android:background="@color/colorAccent"
        android:layout_gravity="center">

        <TextView
            android:id="@+id/textViewT"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Some Text"
            android:textSize="18sp"
            android:textStyle="bold"
            android:textColor="@color/colorPrimaryDark"
            android:gravity="center"/>

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Something"
            android:textSize="12sp"
            android:textColor="@color/colorPrimary"
            android:gravity="center"/>

    </LinearLayout>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingStart="10dp"
        android:paddingEnd="10dp"
        android:scrollbars="vertical" />

动画：

<set xmlns:android="http://schemas.android.com/apk/res/android"
android:fillAfter="true">

<translate
    android:duration="300"
    android:fromYDelta="0"
    android:toYDelta="-100%"/>

而且我的MainActivity看起来：

public class MainActivity extends AppCompatActivity {

MyRecyclerViewAdapter adapter;
boolean animationOnOff;
LinearLayout ll;
Animation animScroll;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    ArrayList<String> animalNames = new ArrayList<>();
    animalNames.add("Horse");
    ....

    animationOnOff = true;
    ll = findViewById(R.id.linearLayout1);
    animScroll = AnimationUtils.loadAnimation(this, R.anim.total_gasto_hide);
    animScroll.setAnimationListener(new Animation.AnimationListener() {
        @Override
        public void onAnimationStart(Animation animation) {

        }

        @Override
        public void onAnimationEnd(Animation animation) {
            ll.animate().alpha(0).setDuration(0).withEndAction(new Runnable() {
                @Override
                public void run() {
                    ll.setVisibility(View.GONE);
                }
            });
        }

        @Override
        public void onAnimationRepeat(Animation animation) {

        }
    });
    RecyclerView recyclerView = findViewById(R.id.list);
    recyclerView.setLayoutManager(new LinearLayoutManager(this));
    adapter = new MyRecyclerViewAdapter(this, animalNames);
    recyclerView.setAdapter(adapter);
    recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);
            if(dy > 0) {
                if(animationOnOff) {
                    ll.startAnimation(animScroll);
                    animationOnOff = false;
                }
            } else {

            }
        }
    });
}
}

此代码应将linearLayout1抬起，并在300ms后以visibility(view.GONE)消失，到目前为止，效果很好。问题在于，recyclerview不会被该动画所吸引，并且当linearLayout1消失时，recycler会立即使视图的位置消失（进行某种闪烁效果）。上面的Gif：

所以我的问题是，当linearLayout1消失时，如何消除闪烁效果并实现平滑的插值效果？

Answer 1

Android默认情况下可以为您处理动画。只需将android:animateLayoutChanges="true"添加到您的父项LinearLayout中，可见性就会变成动画。

Answer 2

我建议您将CoordinatorLayout