Select RecyclerView 项目（只需点击一下）与 recyclerview 选择库

Question

我刚接触 RecyclerView 选择库。我准备了 RecyclerView 到 select 多个项目，只需单击一下。我的问题是所有文章和教程都显示 selection 过程从长按开始。

如何覆盖以通过单击启动 selection？谢谢。

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

教程，我试过了..

Answer 1

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 class.

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。

Answer 2

经过数周的挖掘，我找到了可行的解决方案。根据 한로니

If you want single-tap to select, just override inSelectionHotspot(e: MotionEvent) to return 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
        }

你可以在Here

上看到更多

Select RecyclerView 项目（只需点击一下）与 recyclerview 选择库

Select ReyclerView item(just single tap) with recycler view selection library

android

android-recyclerview

android-support-library