帮我写一份Android Viewpagger2+fragment实现分页滑动效果

好的，下面是实现步骤：

1. 在 build.gradle 文件中添加以下依赖：

dependencies {
    implementation 'androidx.viewpager2:viewpager2:1.0.0'
}

2. 在布局文件中添加 ViewPager2：

<androidx.viewpager2.widget.ViewPager2
    android:id="@+id/viewPager2"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

3. 创建 Fragment：

public class MyFragment extends Fragment {
    private int mPage;

    public static MyFragment newInstance(int page) {
        MyFragment fragment = new MyFragment();
        Bundle args = new Bundle();
        args.putInt("page", page);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mPage = getArguments().getInt("page");
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_my, container, false);
        TextView textView = view.findViewById(R.id.textView);
        textView.setText("Page " + mPage);
        return view;
    }
}

4. 创建 FragmentAdapter：

public class MyFragmentAdapter extends FragmentStateAdapter {
    private int mItemCount;

    public MyFragmentAdapter(FragmentActivity fragmentActivity, int itemCount) {
        super(fragmentActivity);
        mItemCount = itemCount;
    }

    @Override
    public Fragment createFragment(int position) {
        return MyFragment.newInstance(position);
    }

    @Override
    public int getItemCount() {
        return mItemCount;
    }
}

5. 在 Activity 中设置 ViewPager2：

ViewPager2 viewPager2 = findViewById(R.id.viewPager2);
MyFragmentAdapter adapter = new MyFragmentAdapter(this, 5); // 设置 Fragment 数量
viewPager2.setAdapter(adapter);

这样就完成了 ViewPager2 + Fragment 实现分页滑动效果的实现。