Android 使用长时间单击查看项目选择

我有recycler视图，我解析来自jsonArray的数据并将其显示为列表。现在，我想在长时间单击我已经为长时间单击编码的位置时突出显示该行。如何突出显示所选行。请帮助我

recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getApplicationContext(), recyclerView, new ClickListener() {
                @Override
                public void onClick(View view, int position) {

                }

                @Override
                public void onLongClick(View view, int position) {
                    Toast.makeText(MainActivity.this, "long clicked", Toast.LENGTH_SHORT).show();

                }
            }));

在适配器中执行onBindViewHolder时，我会尝试添加longClick侦听器

---

在您的情况下，如果将longClicked项位置设置为int，并将其自身设置为视图，则可以执行以下操作：

            recyclerView.addOnItemTouchListener(new 

                RecyclerTouchListener(getApplicationContext(), recyclerView, new ClickListener() {
                                @Override
                                public void onClick(View view, int position) {

                                }

                                @Override
                                public void onLongClick(View view, int position) {
                                    view.setTag("Selected"); 
                                    recyclerView.getAdapter().notifyItemChanged(position);
                                    return true;
                                }
                            }));

然后在RecyclerView.Adapter中执行以下操作：

@Override
public void onBindViewHolder(YourViewHolderClass holder, int position) {
          if(holder.getTag().equals("Selected"){
                    //do highlight
                    //for example whit [RecyclerView.ItemDecoration][1]
                }else{
                    //remove highlight
                    //else is mandatory in order to prevent bugs when view is recycled
                }
    });
}

---

试试这个。在适配器中的OnBindViewHolder方法下，如下所示：

@Override
    public void onBindViewHolder(MyViewHolder holder, final int position) {
    holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View v) {
            return false;
           //todo to highlight the row
        }
    });
  }

定义一个类

public class RecyclerViewItemClickListener implements RecyclerView.OnItemTouchListener {

    //GestureDetector to detect touch event.
    private GestureDetector gestureDetector;
    private QueriesListFragment.ClickListener clickListener;

    public RecyclerViewItemClickListener(Context context, final RecyclerView recyclerView, final QueriesListFragment.ClickListener clickListener) {
        this.clickListener = clickListener;
        gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                return true;
            }

            @Override
            public void onLongPress(MotionEvent e) {
                //Find child on x and y position relative to screen
                View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
                if (child != null && clickListener != null) {
                    clickListener.onLongClick(child, recyclerView.getChildLayoutPosition(child));
                }
            }
        });
    }

    @Override
    public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
        //On Touch event
        View child = rv.findChildViewUnder(e.getX(), e.getY());
        if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
            clickListener.onClick(child, rv.getChildLayoutPosition(child));
        }
        return false;
    }

    @Override
    public void onTouchEvent(RecyclerView rv, MotionEvent e) {
    }

    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

    }
}

定义接口

public interface ClickListener {
    void onClick(View view, int position);

    void onLongClick(View view, int position);
}

将此分配给回收器视图

myRecyclerView.addOnItemTouchListener(new RecyclerViewItemClickListener(getActivity(), mQueriesListRecyclerView, new ClickListener() {
        @Override
        public void onClick(View view, int position) {
            //triggers when click
        }

        @Override
        public void onLongClick(View view, int position) {
             //triggers when you long press
        }
    }));

---

您可以存储项目位置并签入适配器，如果项目位置与您存储的位置匹配，则可以更改项目颜色。查看您与适配器的连接位置

myRecyclerView.addOnItemTouchListener(new RecyclerViewItemClickListener(getActivity(), mQueriesListRecyclerView, new ClickListener() {
        @Override
        public void onClick(View view, int position) {
            //triggers when click
        }

        @Override
        public void onLongClick(View view, int position) {
             //triggers when you long press
        }
    }));