使用 recyclerview 选择库选择 RecyclerView 项目（只需单击）

Question

我是 RecyclerView 选择库的新手。我准备RecyclerView 只需单击即可选择多个项目。我的问题是所有文章和教程都表明选择过程从长按开始。

如何覆盖以单击开始选择？谢谢。

我正在使用implementation 'androidx.recyclerview:recyclerview-selection:1.0.0'

教程，我试过了..

• https://github.com/guenodz/recyclerview-selection-demo
• https://medium.com/@Dalvin/android-recycler-view-with-multiple-item-selections-b2af90eb5825
• http://androidkt.com/recyclerview-selection-28-0-0/
• https://code.tutsplus.com/tutorials/how-to-add-selection-support-to-a-recyclerview--cms-32175

Answer 1

经过数周的挖掘，我找到了可行的解决方案。 根据한로니

如果您想单击选择，只需覆盖 inSelectionHotspot(e: MotionEvent) 以返回 true

object : ItemDetailsLookup.ItemDetails<Long>() {
        override fun getSelectionKey(): Long? {

            return itemId
        }

        override fun getPosition(): Int {
            return adapterPosition
        }

        override fun inSelectionHotspot(e: MotionEvent): Boolean {
            return true
        }

更多信息请关注Here

Answer 2

我认为最好的方法是你需要使用下面的代码来实现。

  recyclerView.addOnItemTouchListener(new RecyclerItemClickListener(getContext(), new RecyclerItemClickListener.OnItemClickListener() {
            @Override
            public void onItemClick(View view, int position) {
              // Add your selection code here...
            }
        }));

下面是 RecyclerItemClickListener 类。

package com.android.app;

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 {

    GestureDetector mGestureDetector;
    private OnItemClickListener mListener;

    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) {

    }

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

这是 RecyclerView 的自定义 onItemClickListener。