Android ViewPAger2中带有GridLayoutManager的RecyclerView在前3页中未显示任何内容

我想使用ViewPager2和RecyclerView创建一个自定义日历视图。当我运行该应用程序时，它在第3页中没有显示任何内容！但当我滚动它的其他页面是好的！安卓7.0.0及以下版本和安卓7.1.1及以上版本中出现的这个问题是可以解决的，效果良好。我以前用同样的方法创建了一个自定义日历，但现在它不工作了

ViewPager的适配器：

public class SmartCalendarViewAdapter extends FragmentStateAdapter {

    public SmartCalendarViewAdapter(@NonNull FragmentActivity fragmentActivity) {
        super(fragmentActivity);
    }

    public SmartCalendarViewAdapter(@NonNull Fragment fragment) {
        super(fragment);
    }

    @NonNull
    @Override
    public Fragment createFragment(int pos) {
        return SmartCalendarFragment.getInstance(pos);
    }

    @Override
    public int getItemCount() {
        return Integer.MAX_VALUE;
    }
}

日历片段：

    public class SmartCalendarFragment extends Fragment {

    private RecyclerView mCalendarRecyclerView;
    private TextView txtPos;
    private int mPosition;


    public static SmartCalendarFragment getInstance(int position) {
        SmartCalendarFragment smartCalendarFragment = new SmartCalendarFragment();
        Bundle bundle = new Bundle();
        bundle.putInt("mPosition", position);
        smartCalendarFragment.setArguments(bundle);
        return smartCalendarFragment;
    }


    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Bundle bundle = getArguments();
        if (bundle != null) {
            mPosition = bundle.getInt("mPosition");
        }
    }


    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.smart_calendar_fragment_layout, container, false);
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        findViews(view);
        ArrayList<Integer> models = new ArrayList<>();
        for (int i = 1; i <= 42; i++) {
            models.add(i);
        }
        mCalendarRecyclerView.setLayoutManager(new GridLayoutManager(getContext(), 7));
        CalendarCellAdapter adapter = new CalendarCellAdapter(models);
        mCalendarRecyclerView.setAdapter(adapter);
        txtPos.setText(String.valueOf(mPosition));
    }

    private void findViews(View view) {
        mCalendarRecyclerView = view.findViewById(R.id.smart_calendar_recyclerView);
        txtPos = view.findViewById(R.id.txtPos);
    }

}

片段布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/smart_calendar_fragment_root"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layoutDirection="rtl"
    android:orientation="vertical">

    <TextView
        android:id="@+id/txtPos"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/smart_calendar_recyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:overScrollMode="never" />


</LinearLayout>

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/item_attendance_cell_root"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools">
    <TextView
        android:id="@+id/item_attendance_cell_txtDate"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="w,1:1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:padding="4dp"
        android:layout_marginTop="4dp"
        android:layout_marginBottom="4dp"
        tools:text="1" />

</androidx.constraintlayout.widget.ConstraintLayout>

<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=".MainActivity">

    <androidx.viewpager2.widget.ViewPager2
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/viewPager2"
        android:background="#ADABF3"
        app:layout_constraintTop_toTopOf="parent"
        />
</androidx.constraintlayout.widget.ConstraintLayout>

单元布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/smart_calendar_fragment_root"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layoutDirection="rtl"
    android:orientation="vertical">

    <TextView
        android:id="@+id/txtPos"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/smart_calendar_recyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:overScrollMode="never" />


</LinearLayout>

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/item_attendance_cell_root"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools">
    <TextView
        android:id="@+id/item_attendance_cell_txtDate"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="w,1:1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:padding="4dp"
        android:layout_marginTop="4dp"
        android:layout_marginBottom="4dp"
        tools:text="1" />

</androidx.constraintlayout.widget.ConstraintLayout>

<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=".MainActivity">

    <androidx.viewpager2.widget.ViewPager2
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/viewPager2"
        android:background="#ADABF3"
        app:layout_constraintTop_toTopOf="parent"
        />
</androidx.constraintlayout.widget.ConstraintLayout>

主活动布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/smart_calendar_fragment_root"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layoutDirection="rtl"
    android:orientation="vertical">

    <TextView
        android:id="@+id/txtPos"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/smart_calendar_recyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:overScrollMode="never" />


</LinearLayout>

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/item_attendance_cell_root"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools">
    <TextView
        android:id="@+id/item_attendance_cell_txtDate"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="w,1:1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:padding="4dp"
        android:layout_marginTop="4dp"
        android:layout_marginBottom="4dp"
        tools:text="1" />

</androidx.constraintlayout.widget.ConstraintLayout>

<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=".MainActivity">

    <androidx.viewpager2.widget.ViewPager2
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/viewPager2"
        android:background="#ADABF3"
        app:layout_constraintTop_toTopOf="parent"
        />
</androidx.constraintlayout.widget.ConstraintLayout>

---

将单元格布局文件中文本视图的宽度更改为

包装内容

可以解决此问题

---

不知道为什么它只影响预加载的页面，为什么只影响安卓7及更低版本。。。但是，将TextView设置为1:1的比例无论如何都没有明显的效果，因为父视图被拉伸以填充整个屏幕宽度的7个单元格。

哦，我的天哪！愚蠢的问题！非常感谢你。我储备了4天！为了找到问题，我改变了一切。还尝试使用ViewPager而不是ViewPager2和GridView而不是RecyclerView，但同样的问题！！jsut用于包装内容

宽度！！Tanks a lotcool-很高兴能够提供帮助：）