클릭 된 항목과 RecyclerView에서 해당 위치 가져 오기

클릭 된 항목과 RecyclerView에서 해당 위치 가져 오기

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내를 교체하고 ListView함께 RecyclerView확인을 보여주는 목록,하지만 난 방법과 유사 클릭 된 항목의 위치를 얻는 방법을 알고 싶습니다 OnItemClickListener.onItemClick(AdapterView parent, View v, int position, long id)우리가 사용합니다 ListView.

아이디어 주셔서 감사합니다!

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링크 기반 : RecyclerView에 onItemClickListener ()가없는 이유는 무엇입니까? RecyclerView가 Listview와 어떻게 다른가요? , @Duncan의 일반적인 아이디어도 여기에 내 솔루션을 제공합니다.

• RecyclerViewClickListener어댑터에서 Activity/로 메시지를 전달하기위한 하나의 인터페이스 를 정의하십시오 Fragment.

  public interface RecyclerViewClickListener {
      public void recyclerViewListClicked(View v, int position);
  }
  

• 에서 것은 Activity/ Fragment인터페이스를 구현하고, 또한 어댑터에 리스너를 전달합니다 :

  @Override
  public void recyclerViewListClicked(View v, int position){... ...}
  
  //set up adapter and pass clicked listener this
  myAdapter = new MyRecyclerViewAdapter(context, this);
  

• 에서 Adapter와 ViewHolder:

  public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ItemViewHolder> {
     ... ... 
     private Context context;
     private static RecyclerViewClickListener itemListener;
  
  
     public MyRecyclerViewAdapter(Context context, RecyclerViewClickListener itemListener) {
         this.context = context;
         this.itemListener = itemListener;
         ... ...
     }
  
  
     //ViewHolder class implement OnClickListener, 
     //set clicklistener to itemView and, 
     //send message back to Activity/Fragment 
     public static class ItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
         ... ...
         public ItemViewHolder(View convertView) {
             super(convertView);
             ... ...
             convertView.setOnClickListener(this);
         }
  
         @Override
         public void onClick(View v) {
             itemListener.recyclerViewListClicked(v, this.getPosition());     
  
         }
     }
  }
  

테스트 후 정상적으로 작동합니다.

[ 업데이트 ]

API 22부터는 RecyclerView.ViewHoler.getPosition()더 이상 사용되지 않으므로 대신 getLayoutPosition().

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public class MyRvAdapter extends RecyclerView.Adapter<MyRvAdapter.MyViewHolder>{
    public Context context;
    public ArrayList<RvDataItem> dataItems;

    ...
    constructor
    overrides
    ...

    class MyViewHolder extends RecyclerView.ViewHolder{
        public TextView textView;
        public Context context;

        public MyViewHolder(View itemView, Context context) {
            super(itemView);

            this.context = context;

            this.textView = (TextView)itemView.findViewById(R.id.textView);

            // on item click
            itemView.setOnClickListener(new View.OnClickListener(){
                @Override
                public void onClick(View v) {
                    // get position
                    int pos = getAdapterPosition();

                    // check if item still exists
                    if(pos != RecyclerView.NO_POSITION){
                        RvDataItem clickedDataItem = dataItems.get(pos);
                        Toast.makeText(v.getContext(), "You clicked " + clickedDataItem.getName(), Toast.LENGTH_SHORT).show();
                    }
                }
            });
        }
    }
}

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다음은 클릭 리스너를 설정하는 예입니다.

Adapter extends  RecyclerView.Adapter<MessageAdapter.MessageViewHolder> {  ...  }

 public static class MessageViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        public TextView     tv_msg;
        public TextView     tv_date;
        public TextView     tv_sendTime;
        public ImageView    sharedFile;
        public ProgressBar sendingProgressBar;

        public MessageViewHolder(View v) {
            super(v);
            tv_msg =  (TextView) v.findViewById(R.id.tv_msg);
            tv_date = (TextView)  v.findViewById(R.id.tv_date);
            tv_sendTime = (TextView)  v.findViewById(R.id.tv_sendTime);
            sendingProgressBar = (ProgressBar) v.findViewById(R.id.sendingProgressBar);
            sharedFile = (ImageView) v.findViewById(R.id.sharedFile);

            sharedFile.setOnClickListener(this);

        }

        @Override
        public void onClick(View view) {
        int position  =   getAdapterPosition();


            switch (view.getId()){
                case R.id.sharedFile:


                    Log.w("", "Selected"+position);


                    break;
            }
        }

    }

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활동에서 리사이클 러 뷰를 정의하는 곳에이 코드를 넣으십시오.

    rv_list.addOnItemTouchListener(
            new RecyclerItemClickListener(activity, new RecyclerItemClickListener.OnItemClickListener() {
                @Override
                public void onItemClick(View v, int position) {

                    Toast.makeText(activity, "" + position, Toast.LENGTH_SHORT).show();
                }
            })
    );

그런 다음 별도의 클래스를 만들고 다음 코드를 넣으십시오.

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {

    private OnItemClickListener mListener;
    public interface OnItemClickListener {
        public void onItemClick(View view, int position);
    }
    GestureDetector mGestureDetector;
    public RecyclerItemClickListener(Context context, OnItemClickListener listener) {
        mListener = listener;
        mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                return true;
            }
        });
    }
    @Override
    public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
        View childView = view.findChildViewUnder(e.getX(), e.getY());
        if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
            mListener.onItemClick(childView, view.getChildAdapterPosition(childView));
        }
        return false;
    }

    @Override
    public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) {
    }

    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

    }
}

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어댑터 대신 활동 / 조각에서 재활용보기의 클릭 이벤트를 원할 경우 다음과 같은 바로 가기 방법을 사용할 수도 있습니다.

recyclerView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                final TextView txtStatusChange = (TextView)v.findViewById(R.id.txt_key_status);
                txtStatusChange.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Log.e(TAG, "hello text " + txtStatusChange.getText().toString() + " TAG " + txtStatusChange.getTag().toString());
                        Util.showToast(CampaignLiveActivity.this,"hello");
                    }
                });
                return false;
            }
        });

인터페이스 사용과 같은 다른 긴 방법을 사용할 수도 있습니다.

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recyclerViewObject.addOnItemTouchListener(
    new RecyclerItemClickListener(
        getContext(),
        recyclerViewObject,
        new RecyclerItemClickListener.OnItemClickListener() {
            @Override public void onItemClick(View view, int position) {
                // view is the clicked view (the one you wanted
                // position is its position in the adapter
            }
            @Override public void onLongItemClick(View view, int position) {
            }
        }
    )
);

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아래 코드로 자바 파일 생성

public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
private OnItemClickListener mListener;

public interface OnItemClickListener {
    public void onItemClick(View view, int position);
}

GestureDetector mGestureDetector;

public RecyclerItemClickListener(Context context, OnItemClickListener listener) {
    mListener = listener;
    mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
        @Override public boolean onSingleTapUp(MotionEvent e) {
            return true;
        }
    });
}

@Override public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
    View childView = view.findChildViewUnder(e.getX(), e.getY());
    if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
        mListener.onItemClick(childView, view.getChildLayoutPosition(childView));
        return true;
    }
    return false;
}

@Override public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) { }

@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

}

RecyclerView 객체에서 리스너를 사용하십시오.

recyclerView.addOnItemTouchListener(  
new RecyclerItemClickListener(context, new RecyclerItemClickListener.OnItemClickListener() {
  @Override public void onItemClick(View view, int position) {
    // TODO Handle item click
  }
}));

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아래 코드를 사용하십시오.

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

...

class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{


    @Override
    public void onClick(View v) {
        // here you use position
        int position = getAdapterPosition();
        ...

    }
}
}

---

RecyclerView는 이러한 방법을 제공하지 않습니다.

RecyclerView에서 클릭 이벤트를 관리하기 위해 ViewHolder를 바인딩 할 때 어댑터에서 onClickListener를 구현하게되었습니다. viewHolder 클릭을 처리하는 데 필요한 정보 (예 : 위치) 및 클릭 리스너와 함께 태그를 설정했습니다.

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//Create below methods into the Activity which contains RecyclerView.


private void createRecyclerView() {

final RecyclerView recyclerView = (RecyclerView)findViewById(R.id.recyclerView);
    recyclerView.setLayoutManager(new LinearLayoutManager(this));
    MyAdapter myAdapter=new MyAdapter(dataAray,MianActivity.this);
    recyclerView.setAdapter(myAdapter);
    recyclerView.setItemAnimator(new DefaultItemAnimator());

    setRecyclerViewClickListner(recyclerView);
}

private void setRecyclerViewClickListner(RecyclerView recyclerView){

    final GestureDetector gestureDetector = new GestureDetector(MainActivity.this,new GestureDetector.SimpleOnGestureListener() {
        @Override public boolean onSingleTapUp(MotionEvent e) {
            return true;
        }
    });


    recyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
        @Override
        public boolean onInterceptTouchEvent(RecyclerView recyclerView, MotionEvent motionEvent) {
            View child =recyclerView.findChildViewUnder(motionEvent.getX(),motionEvent.getY());
            if(child!=null && gestureDetector.onTouchEvent(motionEvent)){
               int position=recyclerView.getChildLayoutPosition(child);
                String name=itemArray.get(position).name;

            return true;
        }

        @Override
        public void onTouchEvent(RecyclerView recyclerView, MotionEvent motionEvent) {

        }

        @Override
        public void onRequestDisallowInterceptTouchEvent(boolean b) {

        }
    });
}

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이런 식으로 시도

어댑터 클래스 :

 public class ContentAdapter extends RecyclerView.Adapter<ContentAdapter.ViewHolder> {

public interface OnItemClickListener {
    void onItemClick(ContentItem item);
}

private final List<ContentItem> items;
private final OnItemClickListener listener;

public ContentAdapter(List<ContentItem> items, OnItemClickListener listener) {
    this.items = items;
    this.listener = listener;
}

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

@Override public void onBindViewHolder(ViewHolder holder, int position) {
    holder.bind(items.get(position), listener);
}

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

static class ViewHolder extends RecyclerView.ViewHolder {

    private TextView name;
    private ImageView image;

    public ViewHolder(View itemView) {
        super(itemView);
        name = (TextView) itemView.findViewById(R.id.name);
        image = (ImageView) itemView.findViewById(R.id.image);
    }

    public void bind(final ContentItem item, final OnItemClickListener listener) {
        name.setText(item.name);
        itemView.setOnClickListener(new View.OnClickListener() {
            @Override public void onClick(View v) {
                listener.onItemClick(item);
            }
        });
    }
}

}

활동 또는 조각에서 :

ContentAdapter adapter = new ContentAdapter(itemList, this);

참고 : 활동 또는 프래그먼트 및 오버라이드 메소드에서 제공 한 컨텍스트를 기반으로 OnItemClickListener를 구현하십시오.

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다른 접근 방식을 사용할 때마다. 사람들은 ViewHolder에 의해 표시되는 개체에 대한 참조를 저장하는 대신보기에 저장하거나 위치를 얻는 것처럼 보입니다.

대신이 방법을 사용하고 onBindViewHolder ()가 호출 될 때 ViewHolder에 저장하고 onViewRecycled ()에서 참조를 null로 설정합니다.

Every time ViewHolder becomes invisible, it's recycled. So this doesn't affect in large memory consumption.

@Override
public void onBindViewHolder(final ItemViewHolder holder, int position) {
    ...
    holder.displayedItem = adapterItemsList.get(i);
    ...
}

@Override
public void onViewRecycled(ItemViewHolder holder) {
    ...
    holder.displayedItem = null;
    ...
}

class ItemViewHolder extends RecyclerView.ViewHolder {
    ...
    MySuperItemObject displayedItem = null;
    ...
}

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Short extension for Kotlin
Method returns absolute position of all items (not the position of only visible items).

fun RecyclerView.getChildPositionAt(x: Float, y: Float): Int {
    return getChildAdapterPosition(findChildViewUnder(x, y))
}

And usage

val position = recyclerView.getChildPositionAt(event.x, event.y)

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Here is the simplest and the easiest way to find the position of the clicked item:

I've also faced the same problem.

I wanted to find of the position of the clicked/selected item of the RecyclerView() and perform some specific operations on that particular item.

getAdapterPosition() method works like a charm for these kind of stuff. I found this method after a day of long research and after trying numerous other methods.

int position = getAdapterPosition();
Toast.makeText(this, "Position is: "+position, Toast.LENGTH_SHORT).show();

You do not have to use any extra method. Just create a global variable named 'position' and initialize it with getAdapterPosition() in any of the major method of the adapter (class or similar).

Here is a brief documentation from this link.

getAdapterPosition added in version 22.1.0 int getAdapterPosition () Returns the Adapter position of the item represented by this ViewHolder. Note that this might be different than the getLayoutPosition() if there are pending adapter updates but a new layout pass has not happened yet. RecyclerView does not handle any adapter updates until the next layout traversal. This may create temporary inconsistencies between what user sees on the screen and what adapter contents have. This inconsistency is not important since it will be less than 16ms but it might be a problem if you want to use ViewHolder position to access the adapter. Sometimes, you may need to get the exact adapter position to do some actions in response to user events. In that case, you should use this method which will calculate the Adapter position of the ViewHolder.

Happy to help. Feel free to ask doubts.

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Use getLayoutPosition() in your custom interface java method. This will return the selected position of an item, check full detail on

https://becody.com/get-clicked-item-and-its-position-in-recyclerview/

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From the designer, you can set the onClick property of the listItem to a method defined with a single parameter. I have an example method defined below. The method getAdapterPosition will give you the index of the selected listItem.

public void exampleOnClickMethod(View view){
    myRecyclerView.getChildViewHolder(view).getAdapterPosition());
}

For information on setting up a RecyclerView, see the documentation here: https://developer.android.com/guide/topics/ui/layout/recyclerview

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In onViewHolder set onClickListiner to any view and in side click use this code :

Toast.makeText(Drawer_bar.this, "position" + position, Toast.LENGTH_SHORT).show();

Replace Drawer_Bar with your Activity name.

참고URL : https://stackoverflow.com/questions/28296708/get-clicked-item-and-its-position-in-recyclerview