仅在Android中显示嵌套在RecyclerView中的第一个ViewPager

Question

我有一个包含FragmentStatePagerAdapter的ViewPager在RecyclerView中，但它只显示RecyclerView中的第一行，请帮助我。

ViewPager适配器： public class CustomPagerAdapter extends FragmentStatePagerAdapter { private static int NUM_ITEMS = 3;

    public CustomPagerAdapter(FragmentManager fragmentManager) {
        super(fragmentManager);
        Log.e("fragmentManager",fragmentManager.toString());
    }

    // Returns total number of pages
    @Override
    public int getCount() {
        return NUM_ITEMS;
    }

    // Returns the fragment to display for that page
    @Override
    public Fragment getItem(int position) {
        Fragment currentFragment;
        switch (position) {
            case 0:
                currentFragment=new FirstFragment();
                break;
            case 1:
                currentFragment=new SecondFragment();
                break;
            case 2:
                currentFragment=new ThirdFragment();
                break;
            default:
                currentFragment=new FirstFragment();
                break;
        }

        return currentFragment;
    }

    @Override
    public int getItemPosition(Object object) {
        return POSITION_NONE;
    }
}

RecyclerView 适配器：

public class JobAdapter extends RecyclerView.Adapter<JobAdapter.JobHolder> {
    private Context context;
    private List<String> mJobList = new ArrayList<>();

    public JobAdapter(List<String> mJobList,Context context) {
        this.mJobList = mJobList;
        this.context=context;
    }

    @Override
    public JobHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater layoutInflater = LayoutInflater.from(context);
        View view = layoutInflater.inflate(R.layout.find_job_line_content, parent, false);
        return new JobHolder(view);
    }

    @Override
    public void onBindViewHolder(final JobHolder holder, int position) {
        configurePagerHolder(holder, position);
    }

    private void configurePagerHolder(JobHolder holder, int position) {
        //Job job= mJobList.get(position);
        CustomPagerAdapter adapter = new CustomPagerAdapter(((MainActivity)context).getSupportFragmentManager());
        holder.viewPager.setAdapter(adapter);
        adapter.notifyDataSetChanged();
        holder.viewPager.setCurrentItem(1);
        Log.e("configurePagerHolder",position+"");

    }

    public int getItemCount() {``
        return mJobList.size();
    }


    public class JobHolder extends RecyclerView.ViewHolder{
        ViewPager viewPager;
        public JobHolder(View itemView) {
            super(itemView);
            viewPager=(ViewPager)itemView.findViewById(R.id.slidesPager);
        }

    }

主函数：

public class MainActivity extends AppCompatActivity {
    RecyclerView mRecyclerView;
    JobAdapter adapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mRecyclerView = (RecyclerView)findViewById(R.id.find_jobs_recyclerview);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this,
                LinearLayoutManager.VERTICAL,false));
        mRecyclerView.setHasFixedSize(true);
        List<String> list=new ArrayList<>();
        list.add("1");
        list.add("2");
        list.add("3");
        adapter = new JobAdapter(list,this);
        mRecyclerView.setAdapter(adapter);

    }
}

- tom

---

你找到解决方法了吗？ - Borislav Kamenov

是的，我通过编程创建了ViewPager ID，并且它可以正常工作。 - tom

请解释一下您是如何在程序中设置ViewPager ID的？您是如何解决这个问题的？谢谢。 - Taras Vovkovych

Answer 1

你需要在每个单元格中更改viewpager的id

binding.viewPager.id = binding.viewPager.id+position

- Ahmed Ehab

Answer 2

回答很晚，但可能会对一些人有所帮助...

尝试使用ViewPager2（ViewPager的改进版本）：https://developer.android.com/training/animation/screen-slide-2

在我的情况下，它解决了问题。

- LaurentP22