android - Viewpager 内的多个 Recyclerview 问题

问题描述

我有一个Viewpager里面有两个标签。选项卡是卡片和收藏卡片。我在两个选项卡中使用相同的片段。该片段包含一个RecyclerView我动态更新的。我将元素一个一个地添加到两个选项卡中。我首先将元素完全添加到第一个选项卡（卡片选项卡），完成后我将元素添加到第二个选项卡（最喜欢的卡片选项卡）。我的问题是当我将元素添加到第二个选项卡时，我RecyclerView内部的第一个选项卡也会更新。现在第一个选项卡中的元素RecyclerView是现有元素加上我在第二个选项卡中添加的元素的总和。ViewPager我在两个选项卡中设置了两个不同的 ArrayList 。但是当getItemCount()在第一个选项卡中调用时RecyclerView， ArrayList 具有我在第二个选项卡中添加的元素。

我RecyclerView在两个选项卡中都使用带有 a 的相同片段。当我想更新单个选项卡时，我会调用notifyDatasetChanged(). ViewPager所以每次RecyclerView片段内部都会重新初始化。

这是我的 Viewpager 适配器

public class ViewPagerWebCardsAdapter extends FragmentStatePagerAdapter {

private ArrayList<WebCardBaseResponseModel> webCardDetailList;
private ArrayList<WebCardBaseResponseModel> followingWebCardList;
private Context context;
private boolean isEmptyFavoriteWebcardList;
private boolean isEmptyWebcardsList;

public ViewPagerWebCardsAdapter(FragmentManager fm, ArrayList<WebCardBaseResponseModel> webCardDetailList,
                                ArrayList<WebCardBaseResponseModel> followingWebCardList,
                                Context context) {
    super(fm);
    this.webCardDetailList = webCardDetailList;
    this.followingWebCardList = followingWebCardList;
    this.context = context;
}

public void updateWebCardLists( ArrayList<WebCardBaseResponseModel> webCardDetailList,
                                ArrayList<WebCardBaseResponseModel> followingWebCardList) {
    this.webCardDetailList = webCardDetailList;
    this.followingWebCardList = followingWebCardList;
    notifyDataSetChanged();
}

public void setEmptyFollowingCardsFragment() {
    isEmptyFavoriteWebcardList = true;
    notifyDataSetChanged();
}

public void setEmptyWebCardsFragment() {
    isEmptyWebcardsList = true;
    notifyDataSetChanged();
}

@Override
public Fragment getItem(int position) {
    if(position == 0) {
        WebCardListFragment webCardListFragment = new WebCardListFragment();
        webCardListFragment.setWebCardDetailList(webCardDetailList);
        webCardListFragment.setEmptyListFragment(isEmptyWebcardsList);
        return webCardListFragment;
    } else {
        WebCardListFragment webCardListFragment = new WebCardListFragment();
        webCardListFragment.setWebCardDetailList(followingWebCardList);
        webCardListFragment.setEmptyListFragment(isEmptyFavoriteWebcardList);
        webCardListFragment.setAsFavoritesList();
        return webCardListFragment;
    }
}

@Override
public int getCount() {
    return Constants.NUMBER_TWO;
}

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

@Override
public CharSequence getPageTitle(int position) {
    if(position == 0) {
        return context.getString(R.string.webcards);
    } else {
        return context.getString(R.string.favorite);
    }
}

}

这是我的卡片片段

public class WebCardListFragment extends Fragment {

@BindView(R.id.web_card_recycler_view)
RecyclerView mWebCardDetailRecyclerView;

@BindView(R.id.tv_description)
TextView tvDescription;

@BindView(R.id.progress_bar)
public ProgressBar progressBar;

private WebCardListAdapter mWebCardListAdapter;
ArrayList<WebCardBaseResponseModel> mWebCardDetailList;
WebCardActivity activity;
private boolean isFavorites;
private boolean isEmptyListFragment;

@Override
public void onAttach(Context context) {
    super.onAttach(context);
    activity = (WebCardActivity) context;
}

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

public void setWebCardDetailList(ArrayList<WebCardBaseResponseModel> mWebCardDetailList) {
    this.mWebCardDetailList = mWebCardDetailList;
}

public void setAsFavoritesList() {
    this.isFavorites = true;
}

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_webcard_list, container, false);
    ButterKnife.bind(this, view);
    initView();

    return view;
}

private void initView() {
    if(isFavorites) {
        tvDescription.setText(getString(R.string.select_webcard_to_share));
    }

    RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(activity);
    mWebCardDetailRecyclerView.setLayoutManager(mLayoutManager);
    mWebCardDetailRecyclerView.setHasFixedSize(true);
    mWebCardDetailRecyclerView.setItemAnimator(new DefaultItemAnimator());
    if(mWebCardDetailList != null && mWebCardDetailList.size() > 0) {
        progressBar.setVisibility(View.GONE);
        tvDescription.setVisibility(View.VISIBLE);
        mWebCardListAdapter = new WebCardListAdapter(activity, mWebCardDetailList, isFavorites);
    }
    if(isEmptyListFragment) {
        progressBar.setVisibility(View.GONE);
        tvDescription.setVisibility(View.VISIBLE);
        tvDescription.setText(getString(R.string.no_webcards_to_list));
    }
    mWebCardDetailRecyclerView.setAdapter(mWebCardListAdapter);
}

public void setEmptyListFragment(boolean isEmptyList) {
    isEmptyListFragment = isEmptyList;
}

}

最后这是我RecyclerView在片段中使用的适配器

public class WebCardListAdapter extends RecyclerView.Adapter<WebCardListAdapter.ViewHolder> {
private       Context                             mContext;
private       ArrayList<WebCardBaseResponseModel> mWebCardDetailList;
private boolean isFavorites;

public WebCardListAdapter(Context context, ArrayList<WebCardBaseResponseModel> webCardDetailList, boolean isFavorites) {
    mContext = context;
    mWebCardDetailList = webCardDetailList;
    this.isFavorites = isFavorites;
}

@NonNull
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_webcard_detail_layout, parent, false);
    return new ViewHolder(view);
}

@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
    setListItemView(holder, position);
    setListItemClickListener(holder);
}

@Override
public int getItemCount() {
    return mWebCardDetailList.size();
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public int getItemViewType(int position) {
    return position;
}

class ViewHolder extends RecyclerView.ViewHolder {
    private TextView     mCardNameTextView;
    private LinearLayout mWeCardLinearLayout;
    @BindView(R.id.tv_phone)
    TextView phone;

    ViewHolder(View itemView) {
        super(itemView);
        ButterKnife.bind(this, itemView);
        mCardNameTextView = (TextView) itemView.findViewById(R.id.webcard_name_textview);
        mWeCardLinearLayout = (LinearLayout) itemView.findViewById(R.id.wed_card_title_linear_layout);
    }
}

}

我希望ListView两个选项卡内部都是独立的。当我将元素添加到第二个选项卡RecyclerView时，这不应该反映在第一个选项卡RecyclerView中。

标签： androidandroid-recyclerviewandroid-viewpager

android - Viewpager 内的多个 Recyclerview 问题

问题描述

解决方案

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