Android实现播放音乐列表

首先我们看下QQ音乐，酷我音乐的列表图





网易云音乐也是这种列表，下面展示下网易云音乐的音乐列表gif图



总结下播放列表播放音乐的逻辑：

1 点击某一首歌，就开始播放

2 当其他歌曲在播放的时候，点击新的一首歌，原先播放的暂停，新的歌曲播放

3 当前有一首歌在播放，即使列表滑出了屏幕当再次回到屏幕的时候还是显示这首歌在播放

下面开始撸代码：

package com.smartrefesh.listplayer;

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.TextView;

import com.smartrefesh.R;
import com.smartrefesh.model.MusicModel;

import java.util.List;

/**
* Description  音乐播放列表的Adapter
* Created by Administrator
* Time 2018/1/21  15:13
*/

public class ListPlayerAdapter extends RecyclerView.Adapter<ListPlayerAdapter.MusicItemHolder> {
private Context context;
private List<MusicModel> list;
public ListPlayerAdapter(Context context, List<MusicModel> list) {
this.context = context;
this.list = list;
}

@Override
public MusicItemHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new MusicItemHolder(LayoutInflater.from(context).inflate(R.layout.item_text, parent, false));
}

@Override
public void onBindViewHolder(MusicItemHolder holder, int position, List<Object> payloads) {
if(payloads==null||payloads.size()==0){
onBindViewHolder(holder, position);
}else {
holder.musicName.setTextColor(context.getResources().getColor(R.color.black));
}
}

@Override
public void onBindViewHolder(final MusicItemHolder holder, final int position) {
final MusicModel musicModel = list.get(position);
holder.musicName.setText(musicModel.getMusicName());
int playPosition = MusicPlayer.getInstance().getLastPosition();//获取历史播放位置
if(playPosition==position&&MusicPlayer.getInstance().isPlaying()){
holder.musicName.setTextColor(context.getResources().getColor(R.color.colorPrimary));
}else {
holder.musicName.setTextColor(context.getResources().getColor(R.color.black));
}

holder.musicName.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int playPosition = MusicPlayer.getInstance().getLastPosition();//点击切换更换了历史播放位置所以需要重新获取
if(playPosition==position){
if(MusicPlayer.getInstance().isPlaying()){
MusicPlayer.getInstance().pause(position);
holder.musicName.setTextColor(context.getResources().getColor(R.color.black));
}else {
MusicPlayer.getInstance().playUrl(musicModel.getUrl(),position);
holder.musicName.setTextColor(context.getResources().getColor(R.color.colorPrimary));
}
}else {
notifyItemChanged(playPosition,"1");
MusicPlayer.getInstance().playUrl(musicModel.getUrl(),position);
holder.musicName.setTextColor(context.getResources().getColor(R.color.colorPrimary));
}
}
});
}

@Override
public int getItemCount() {
return list==null?0:list.size();
}

static class MusicItemHolder extends RecyclerView.ViewHolder{
private TextView musicName;
public MusicItemHolder(View itemView) {
super(itemView);
musicName = itemView.findViewById(R.id.music_name);
}
}

}

public interface IPlayer {
void playUrl(String url, int currentPosition);
void pause(int currentPosition);
boolean isPlaying();
int getLastPosition();
}

最后看下效果图：