java - 如何在Onitemclicklistener函数接口(interface)上实现多个按钮？

Question

我在这里不明白如何使用这个界面OnItemClickListener对于多个按钮

package com.mtechviral.musicplayer;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

import java.util.ArrayList;

public class SongAdapter extends RecyclerView.Adapter<SongAdapter.SongHolder> {

    private ArrayList<SongInfo> _songs = new ArrayList<SongInfo>();
    private Context context;
    private OnItemClickListener mOnItemClickListener;

    public SongAdapter(Context context, ArrayList<SongInfo> songs) {
        this.context = context;
        this._songs = songs;
    }

    //getting a error
    public interface OnItemClickListener {
        void onItemClick(Button b ,View view, SongInfo obj, int position);
        //add another button parameter
    }

    public interface OnItemClickListener {
        void onItemClick(Button bt ,View view, SongInfo obj, int position);
        //add another button parameter
    }

    public void setOnItemClickListener(final OnItemClickListener mItemClickListener) {
        this.mOnItemClickListener = mItemClickListener;
    }

    @Override
    public SongHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View myView = LayoutInflater.from(context).inflate(R.layout.row_songs,viewGroup,false);
        return new SongHolder(myView);
    }

    @Override
    public void onBindViewHolder(final SongHolder songHolder, final int i) {
            final SongInfo s = _songs.get(i);
            songHolder.tvSongName.setText(_songs.get(i).getSongname());
            songHolder.tvSongArtist.setText(_songs.get(i).getArtistname());
            songHolder.btnAction.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (mOnItemClickListener != null) {
                        mOnItemClickListener.onItemClick(songHolder.btnAction,v, s, i);
                    }
                }
            });
        songHolder.btnStop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mOnItemClickListener != null) {
                    mOnItemClickListener.onItemClick(songHolder.btnStop,v, s, i);
                }
            }
        });

        //write a function for pause
    }

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

    public class SongHolder extends RecyclerView.ViewHolder {
        TextView tvSongName,tvSongArtist;
        Button btnAction,btnStop;

        //declare a new button............................................
        public SongHolder(View itemView) {
            super(itemView);
            tvSongName = (TextView) itemView.findViewById(R.id.tvSongName);
            tvSongArtist = (TextView) itemView.findViewById(R.id.tvArtistName);
            btnAction = (Button) itemView.findViewById(R.id.btnAction);
            btnStop = (Button) itemView.findViewById(R.id.btnStop);
            //declaraion details
            //....................................................
        }
    }
}

Answer 1

您不需要定义多个接口(interface)来处理多个按钮。您可以仅使用一种方法，也可以在监听器接口(interface)内添加另一种方法来处理这两种单击。在我看来，您应该添加另一种方法来分离处理。像这样的事情:

public class SongAdapter extends RecyclerView.Adapter<SongAdapter.SongHolder> {

  ...

  public interface OnItemClickListener {
    // Only use 2 parameters because you just need them.
    void onActionClicked(SongInfo obj, int position);
    void onStopClicked(SongInfo obj, int position);
  }

  public void setOnItemClickListener(final OnItemClickListener mItemClickListener) {
    this.mOnItemClickListener = mItemClickListener;
  }

  ...

  @Override
  public void onBindViewHolder(final SongHolder songHolder, final int i) {
    ...

    songHolder.btnAction.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        if (mOnItemClickListener != null) {
          mOnItemClickListener.onActionClicked(s, i);
        }
      }
    });

    songHolder.btnStop.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        if (mOnItemClickListener != null) {
          mOnItemClickListener.onStopClicked(s, i);
        }
      }
    });

    //write a function for pause
  }

  ...

}