點擊RecyclerView轉到另一個活動與Android的數據

Question

我使用RecyclerVeiw來顯示一些圖像，並點擊它應該開始新的活動顯示ID，RecyclerView的名稱。我實現了代碼，但它現在工作，不可點擊。下面是我的適配器

import android.content.Context; 
import android.content.Intent; 
import android.support.v7.widget.RecyclerView; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ImageView; 
import android.widget.TextView; 
import com.squareup.picasso.Picasso; 
import java.util.ArrayList; 

import zesteve.com.myapplication.Catagory; 
import zesteve.com.myapplication.CatagoryVendListActivity; 
import zesteve.com.myapplication.R; 

/** 
* Created by Ravi Shankar on 5/13/2017. 
*/ 

public class CatagoryAdapter extends RecyclerView.Adapter<CatagoryAdapter.MyViewHolder>{ 

    private Context mContext; 
    private ArrayList<Catagory> CatagoryList; 

    public CatagoryAdapter(Context mContext, ArrayList<Catagory> CatagoryList) { 
     this.mContext = mContext; 
     this.CatagoryList = CatagoryList; 
    } 

    @Override 
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View itemView = LayoutInflater.from(parent.getContext()) 
       .inflate(R.layout.catagory_card, parent, false); 

     return new MyViewHolder(itemView,mContext,CatagoryList); 
    } 

    @Override 
    public void onBindViewHolder(final MyViewHolder holder, int position) { 
     Catagory catagory = CatagoryList.get(position); 
     holder.title.setText(catagory.getName()); 
     holder.count.setText(catagory.getNumOfVend() + " Places"); 

     // loading album cover using Picasso library 
     Picasso.with(mContext).load(catagory.getThumbnail()).into(holder.thumbnail); 
    } 

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

    public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{ 
     public TextView title, count; 
     public ImageView thumbnail; 

     ArrayList<Catagory> CatagoryList = new ArrayList<Catagory>(); 
     Context mContext; 

     public MyViewHolder(View view , Context mContext, ArrayList<Catagory> CatagoryList) { 
      super(view); 
      this.CatagoryList = CatagoryList; 
      this.mContext = mContext; 
      view.setOnClickListener(this); 
      title = (TextView) view.findViewById(R.id.title); 
      count = (TextView) view.findViewById(R.id.count); 
      thumbnail = (ImageView) view.findViewById(R.id.thumbnail); 
     } 

     @Override 
     public void onClick(View view) { 
      int position = getAdapterPosition(); 
      Catagory catagory = this.CatagoryList.get(position); 
      Intent intent = new Intent(this.mContext, CatagoryVendListActivity.class); 
      intent.putExtra("CatId",catagory.getVendId()); 
      intent.putExtra("CatName",catagory.getName()); 
      this.mContext.startActivity(intent); 


     } 
    } 

} 

和我Catatgory.java

public class Catagory { 
    private String name; 
    private int numOfVend; 
    private int thumbnail; 
    private int VendId; 

    public Catagory() { 
    } 

    public Catagory(String name, int numOfVend, int VendId , int thumbnail) { 
     this.name = name; 
     this.VendId = VendId; 
     this.numOfVend = numOfVend; 
     this.thumbnail = thumbnail; 

    } 

    public String getName() { 
     return name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    public int getNumOfVend() { 
     return numOfVend; 
    } 

    public void setNumOfVend(int numOfVend) { 
     this.numOfVend = numOfVend; 
    } 

    public int getThumbnail() { 
     return thumbnail; 
    } 

    public void setThumbnail(int thumbnail) { 
     this.thumbnail = thumbnail; 
    } 

    public int getVendId() { 
     return VendId; 
    } 

    public void setVendId(int VendId) { 
     this.VendId = VendId; 
    } 
} 

和我的片段

import android.content.Intent; 
import android.content.res.Resources; 
import android.graphics.Rect; 
import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.v4.app.Fragment; 
import android.support.v7.widget.DefaultItemAnimator; 
import android.support.v7.widget.GridLayoutManager; 
import android.support.v7.widget.RecyclerView; 
import android.util.TypedValue; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import java.util.ArrayList; 

import zesteve.com.myapplication.adapter.CatagoryAdapter; 

/** 
* Created by Ratan on 7/29/2015. 
*/ 
public class PrimaryFragment extends Fragment { 

    FloatingActionButton fab; 

    private RecyclerView recyclerView; 
    private CatagoryAdapter adapter; 
    private ArrayList<Catagory> catagoryList; 

    @Override 
    public View onCreateView(final LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     View root = inflater.inflate(R.layout.primary_layout,container,false); 

     recyclerView = (RecyclerView) root.findViewById(R.id.recycler_view); 

     fab = (FloatingActionButton) root.findViewById(R.id.post_new_event); 

     catagoryList = new ArrayList<>(); 
     adapter = new CatagoryAdapter(getActivity(), catagoryList); 

     RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(getActivity(), 2); 
     recyclerView.setLayoutManager(mLayoutManager); 
     recyclerView.addItemDecoration(new GridSpacingItemDecoration(2, dpToPx(10), true)); 
     recyclerView.setItemAnimator(new DefaultItemAnimator()); 
     recyclerView.setAdapter(adapter); 

     prepareCatagory(); 

     fab.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       Intent intent = new Intent(getActivity(),PostNewEvent.class); 
       startActivity(intent); 
      } 
     }); 
     return root; 
    } 

    private void prepareCatagory() { 
     int[] covers = new int[]{ 
       R.drawable.album1, 
       R.drawable.album2, 
       R.drawable.album3, 
       R.drawable.album4, 
       R.drawable.album5, 
       R.drawable.album6, 
       R.drawable.album7, 
       R.drawable.album8, 
       R.drawable.album9, 
       R.drawable.album10, 
       R.drawable.album11 
     }; 

     Catagory a = new Catagory("True Romance", 13, 1, covers[0]); 
     catagoryList.add(a); 

     a = new Catagory("Xscpae", 8, 2 ,covers[1]); 
     catagoryList.add(a); 

     a = new Catagory("Maroon 5",3 ,11, covers[2]); 
     catagoryList.add(a); 

     a = new Catagory("Born to Die",4, 12, covers[3]); 
     catagoryList.add(a); 

     a = new Catagory("Honeymoon",5, 14, covers[4]); 
     catagoryList.add(a); 

     a = new Catagory("I Need a Doctor",6, 1, covers[5]); 
     catagoryList.add(a); 

     a = new Catagory("Loud", 11,7, covers[6]); 
     catagoryList.add(a); 

     a = new Catagory("Legend", 14,8, covers[7]); 
     catagoryList.add(a); 

     a = new Catagory("Hello", 11,9, covers[8]); 
     catagoryList.add(a); 

     a = new Catagory("Greatest Hits",10, 17, covers[9]); 
     catagoryList.add(a); 

     adapter.notifyDataSetChanged(); 
    } 

    /** 
    * RecyclerView item decoration - give equal margin around grid item 
    */ 
    public class GridSpacingItemDecoration extends RecyclerView.ItemDecoration { 

     private int spanCount; 
     private int spacing; 
     private boolean includeEdge; 

     public GridSpacingItemDecoration(int spanCount, int spacing, boolean includeEdge) { 
      this.spanCount = spanCount; 
      this.spacing = spacing; 
      this.includeEdge = includeEdge; 
     } 

     @Override 
     public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) { 
      int position = parent.getChildAdapterPosition(view); // item position 
      int column = position % spanCount; // item column 

      if (includeEdge) { 
       outRect.left = spacing - column * spacing/spanCount; // spacing - column * ((1f/spanCount) * spacing) 
       outRect.right = (column + 1) * spacing/spanCount; // (column + 1) * ((1f/spanCount) * spacing) 

       if (position < spanCount) { // top edge 
        outRect.top = spacing; 
       } 
       outRect.bottom = spacing; // item bottom 
      } else { 
       outRect.left = column * spacing/spanCount; // column * ((1f/spanCount) * spacing) 
       outRect.right = spacing - (column + 1) * spacing/spanCount; // spacing - (column + 1) * ((1f/ spanCount) * spacing) 
       if (position >= spanCount) { 
        outRect.top = spacing; // item top 
       } 
      } 
     } 
    } 

    /** 
    * Converting dp to pixel 
    */ 
    private int dpToPx(int dp) { 
     Resources r = getResources(); 
     return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, r.getDisplayMetrics())); 
    } 


} 

當我點擊cardview什麼也沒發生，沒有錯誤消息也。下面是我的應用程序的屏幕截圖

用於任何疑問，請發表評論。

Answer 1

步驟-1：製作的接口象下面的代碼：

public interface RecyclerViewItemClickListener { 
    void onClickListenerForItem(int position); 

    } 

步驟2：實現該接口：

RecyclerViewItemClickListener recyclerItemClickListener = new RecyclerViewItemClickListener() { 

     @Override 
     public void onClickListenerForItem(int tournamentIndex, int matchIndex) { 
//Todo implement your Code here 
      } 
} 

步驟3：發送實現的接口在適配器類如下面的代碼：

mAdapter = new RecyclerViewAdapte(getContext(), recyclerItemClickListener); 

步驟4：在適配器類工具位置的回調：

private final RecyclerViewItemClickListener mListener; 
public RecyclerViewAdapter(Context context, RecyclerViewItemClickListener mListener) { 
     this.context = context; 
     this.mListener = mListener; 

    } 

第五步：在OnBindViewHolder（） finaly設置位置：

holder.itemView.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      mListener.onClickListenerForItem(position); 
     } 
    });