如何将数据从片段传递到android中的recyclerview适配器类

Question

我正在创建一个应用程序。在这个应用程序中，我有一个 recyclerview。我的单行 recyclerview 有一些按钮。当用户单击该按钮时，我需要启动一个活动（或执行 weservice 调用）。我需要通过此适配器将包含回收器视图的片段中的一些数据传递给新活动。按钮单击发生在适配器中。我陷入了这个问题并且发现很难解决这个问题，任何人都可以帮助我如何解决这个问题。欢迎所有建议。

我的片段代码：

/**
 * A simple {@link Fragment} subclass.
 */
public class Toadline extends Fragment implements ToadlineAdapter.ClickListener{




    public Toadline() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_toadline, container, false);

        recyclerView = (RecyclerView) view.findViewById(R.id.recyclerViewTimeline);



        context = getContext();
        postHeader = getArguments().getStringArrayList("PostHeader");

ToadlineAdapter adapter = new ToadlineAdapter(context, getData1());
            recyclerView.setAdapter(adapter);
            adapter.setClickListener(this);
            recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));


            });



        return view;
    }



        @Override
        public void itemClicked (View view,int position){






        }

    public static List<TimelineDataStore> getData1() {

        List<TimelineDataStore> data = new ArrayList<>();

        int[] icons = {R.mipmap.human_image, R.mipmap.human_image, R.mipmap.human_image, R.mipmap.human_image, R.mipmap.human_image, R.mipmap.human_image, R.mipmap.human_image};
        Bitmap[] images = profileImageAfterDownload;
        ArrayList<String> titles = postHeader;

for (int i = 0; i < titles.size() && i < icons.length && i < noOfDays.size() && i < postTitle.size(); i++) {

            TimelineDataStore current = new TimelineDataStore();
            current.images = images[i];
            //current.iconId = icons[i];
            current.title = titles.get(i);


            data.add(current);
        }
        return data;
    }
}

我的适配器代码：

    import android.content.Context;
    import android.support.v4.widget.SwipeRefreshLayout;
    import android.support.v7.widget.CardView;
    import android.support.v7.widget.RecyclerView;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.Button;
    import android.widget.ImageView;
    import android.widget.TextView;

    import java.util.Collections;
    import java.util.List;

    import toadways.ways.toad.toadways.R;

    /**
     * Created by Toadways Admin on 19-11-2015.
     */
    public class ToadlineAdapter extends RecyclerView.Adapter<ToadlineAdapter.MyViewHolder> {

        private ClickListener clickListener;
        private SwipeRefreshLayout.OnRefreshListener clickListener1;
        private LayoutInflater inflater;
        List<TimelineDataStore> data = Collections.EMPTY_LIST;

        public ToadlineAdapter(Context context, List<TimelineDataStore> data) {
            inflater = LayoutInflater.from(context);
            this.data = data;


        }


        @Override
        public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

            View view = inflater.inflate(R.layout.single_card_row, parent, false);
            MyViewHolder viewHolder = new MyViewHolder(view);
            return viewHolder;
        }


        @Override
        public void onBindViewHolder(MyViewHolder holder, int position) {
            TimelineDataStore current = data.get(position);
            holder.title.setText(current.title);
            holder.images.setImageBitmap(current.images);

          }

        @Override
        public int getItemCount() {

            return data.size();
        }

        public void setClickListener(ClickListener clickListener) {
            this.clickListener = clickListener;
        }

        public void setClickListener1(SwipeRefreshLayout.OnRefreshListener clickListener1) {
            this.clickListener1 = clickListener1;
        }




        // View Holder object for Recycler View
        class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, SwipeRefreshLayout.OnRefreshListener {

            TextView title, noOfDays, postTitle, agreeCount, disAgreeCount, neutralCount, conversationCount, postDescription;
            ImageView icon, postImage, images;
            CardView mCardView;
            Button mShowMore, mShowLess;


            public MyViewHolder(View itemView) {
                super(itemView);
                itemView.setOnClickListener((View.OnClickListener) this);
                title = (TextView) itemView.findViewById(R.id.textViewTitle);
                images = (ImageView) itemView.findViewById(R.id.imageViewUser);
                noOfDays = (TextView) itemView.findViewById(R.id.textViewNoOfDays);
                postTitle = (TextView) itemView.findViewById(R.id.textViewPostDescription);
                postImage = (ImageView) itemView.findViewById(R.id.postImage);
                agreeCount = (TextView) itemView.findViewById(R.id.textViewAgreeCount);
                disAgreeCount = (TextView) itemView.findViewById(R.id.textViewDisAgreeCount);
                neutralCount = (TextView) itemView.findViewById(R.id.textViewNeutralCount);
                conversationCount = (TextView) itemView.findViewById(R.id.textViewConversationCount);
                postDescription = (TextView) itemView.findViewById(R.id.textViewPostContentDescription);

                mCardView = (CardView) itemView.findViewById(R.id.card_view);
                mShowMore = (Button) itemView.findViewById(R.id.buttonSeeMore);
                mShowLess = (Button) itemView.findViewById(R.id.buttonSeeLess);

            }

 mShowLess.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {

                      mContext.startActivity(new Intent(mContext, newActivity.class));

                }
            });

            @Override
            public void onClick(View view) {

                if (clickListener != null) {
                    clickListener.itemClicked(view, getPosition());
                }

            }
        }


        public interface ClickListener {

            public void itemClicked(View view, int position);
        }
    }

我需要将片段中的数组列表传递给适配器中存在的 mShowLess.setOnClickListener 方法的新活动。谁能让我知道我该怎么做，或者有更好的方法来做到这一点。

Answer 1

我是初学者，但我认为这会有所帮助：

如果你想通过和ArrayList 到newActivty 尝试使用：

@Override
 public void onClick(View v) {
      Intent intent = new Intent(mContext, newActivity.class);
    intent.putExtra("arrayList", yourArrayList);
    mContext.startActivity(intent);
                    }
            });

在新活动中：

protected void onCreate(Bundle savedInstanceState) {
        ...
        ArrayList<String> arrayList = getIntent().getExtras().getStringArrayList("arrayList");
    }

Answer 2

在你的 Fragment 中设置数据到适配器

recyclerView.setAdapter(new ToadlineAdapter( context,getData1()));

在你的Adapter里面的构造函数中赋值数据

  private Context context;
  private ArrayList<ProductRequestObject> data;
  public ToadlineAdapter(Context context, List<TimelineDataStore> data) {
            data = data;
            this.context = context;
   } 

然后覆盖适配器中的 onclick 方法

        @Override
        public void onClick(View v) {

        // Here You will get data of the selected position  
            Bundle bumdle;
            bumdle = new Bundle();
            bumdle.putSerializable("selectedPosition ", data.get(getAdapterPosition()));


        }