Question

我基本上要做的是让在回收站视图中显示的对象可以点击某个TextView ID，因为我制作了一个显示专辑封面及其旁边标题的程序在列表中。我需要能够点击回收者视图所做的每一个方框，并在点击时弹出带有其他信息（作者，发布日期，热门歌曲等）的TextView，然后再按一个后退按钮（如果可以）回到专辑列表。我已经看了好几个小时了，无法弄清楚如何让OnclickListener为它工作。如果您知道如何或有任何建议，我很高兴听到他们。谢谢！

package com.albumlist.albumlist;

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 android.widget.Toast;

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private AlbumData[] itemsData;

    public MyAdapter(AlbumData[] itemsData){
        this.itemsData = itemsData;
    }

    public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

        private TextView txtViewTitle;
        private ImageView imgViewIcon;

        public ViewHolder(View itemLayoutView) {
            super(itemLayoutView);
            itemLayoutView.setOnClickListener(this);
            txtViewTitle = (TextView) itemLayoutView.findViewById(R.id.album_title);
            imgViewIcon = (ImageView) itemLayoutView.findViewById(R.id.album_icon);
        }

        @Override
        public void onClick(View v) {

        }
    }

    @Override
    public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {

        View itemLayoutView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.data_layout, null);

        ViewHolder viewHolder = new ViewHolder(itemLayoutView);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(ViewHolder viewHolder, int position) {

        viewHolder.txtViewTitle.setText(itemsData[position].getTitle());
        viewHolder.imgViewIcon.setImageResource(itemsData[position].getImageUrl());
    }

    @Override
    public int getItemCount() {
        return itemsData.length;
    }

}

Answer 1

评论中 Xaver Kapeller 总结了这个概念。如果您正在寻找一种管理RecyclerView互动的简单方法，类似于ListView的传统互动，请查看GitHub上的BigNerdRanch's recyclerview-multiselect库。他们有一个您可以探索的示例应用，它实现了OnClickListeners和OnLongClickListeners系列，并增加了多项选择功能。

以下是BigNerdRanch如何在Fragment和Adapter之间的ViewHolder中实现侦听器的片段，在这种情况下，它实际上是图书馆自己的SwappingHolder.的扩展

public CrimeHolder(View itemView) {
        super(itemView, mMultiSelector);

        mTitleTextView = (TextView) itemView.findViewById(R.id.crime_list_item_titleTextView);
        mDateTextView = (TextView) itemView.findViewById(R.id.crime_list_item_dateTextView);
        mSolvedCheckBox = (CheckBox) itemView.findViewById(R.id.crime_list_item_solvedCheckBox);
        itemView.setOnClickListener(this);
        itemView.setLongClickable(true);
        itemView.setOnLongClickListener(this);
    }

    public void bindCrime(Crime crime) {
        mCrime = crime;
        mTitleTextView.setText(crime.getTitle());
        mDateTextView.setText(crime.getDate().toString());
        mSolvedCheckBox.setChecked(crime.isSolved());
    }

    @Override
    public void onClick(View v) {

        if (mCrime == null) {
            return;
        }
        if (!mMultiSelector.tapSelection(this)) {
            selectCrime(mCrime);
        }

    }


    @Override
    public boolean onLongClick(View v) {

        ((AppCompatActivity) getActivity()).startSupportActionMode(mDeleteMode);
        mMultiSelector.setSelected(this, true);
        return true;
    }


}


private class CrimeAdapter extends RecyclerView.Adapter<CrimeHolder> {
    @Override
    public CrimeHolder onCreateViewHolder(ViewGroup parent, int pos) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.list_item_crime, parent, false);
        return new CrimeHolder(view);
    }

    @Override
    public void onBindViewHolder(CrimeHolder holder, int pos) {
        Crime crime = mCrimes.get(pos);
        holder.bindCrime(crime);
        Log.d(TAG, "binding crime" + crime + "at position" + pos);
    }

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

如何在回收站视图中使用OnClickListener？

1 个答案: