如何在Onitemclicklistener功能界面上实现多个按钮? [英] How to implement multiple buttons on Onitemclicklistener function interface?

问题描述

我在这里不了解如何对多个按钮使用此接口 OnItemClickListener

I am not understanding here how to use this interface OnItemClickListener for multiple buttons

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
            //....................................................
        }
    }
}

推荐答案

您无需定义用于处理多个按钮的多个接口.您只能使用一种方法，也可以在侦听器界面内添加另一种方法来处理这两次单击.在我看来，您应该添加另一种方法来分开处理.像这样:

You don't need to define multiple interfaces for handling the multiple buttons. You can use only one method or you can add another method inside the listener interface to handle both the click. In my perspective, you should add another method to separate the handling. Something like this:

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
  }

  ...

}

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