如何使用Json从RecyclerView添加下一个和上一个按钮

Question

我创建了一个使用Parse JSON的音乐播放器应用程序。但是我遇到一个问题，如何从JSON数据中创建下一个按钮？

公共类RecyclerViewAdapter扩展了RecyclerView.Adapter {

private Context mContext;
private List<Songs> mData;
RequestOptions option;

public RecyclerViewAdapter(Context mContext, List<Songs> mData) {
    this.mContext = mContext;
    this.mData = mData;

    option = new RequestOptions().centerCrop().placeholder(R.drawable.image).error(R.drawable.image);
}

@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

    View view;
    LayoutInflater inflater = LayoutInflater.from(mContext);
    view = inflater.inflate(R.layout.list_music, parent, false);
    final MyViewHolder myViewHolder = new MyViewHolder(view);
    myViewHolder.c_content.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            Intent i = new Intent(mContext, MusicPlayer.class);
            i.putExtra("wap_judul", mData.get(myViewHolder.getAdapterPosition()).getJudul());
            i.putExtra("wap_artis", mData.get(myViewHolder.getAdapterPosition()).getArtis());
            i.putExtra("wap_lagu", mData.get(myViewHolder.getAdapterPosition()).getLagu());
            i.putExtra("wap_lirik", mData.get(myViewHolder.getAdapterPosition()).getLirik());
            i.putExtra("wap_gambar", mData.get(myViewHolder.getAdapterPosition()).getGambar());

            mContext.startActivity(i);
        }
    });

    return myViewHolder;
}

@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {

    holder.tv_judul.setText(mData.get(position).getJudul());
    holder.tv_artis.setText(mData.get(position).getArtis());

    Glide.with(mContext).load(mData.get(position).getGambar()).apply(option).into(holder.img_gambar);

}

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

public static class MyViewHolder extends RecyclerView.ViewHolder {

    TextView tv_judul;
    TextView tv_artis;
    ImageView img_gambar;
    LinearLayout c_content;

    public MyViewHolder(View itemView) {

        super(itemView);

        c_content = itemView.findViewById(R.id.container);
        tv_judul = itemView.findViewById(R.id.judul_lagu);
        tv_artis = itemView.findViewById(R.id.artis);
        img_gambar = itemView.findViewById(R.id.image_lagu);

    }
}

公共类MainActivity扩展了AppCompatActivity，实现了SwipeRefreshLayout.OnRefreshListener {

private final String URL_Data = "http://koleksiapp.com/coba.json";
private JsonArrayRequest request;
private RequestQueue requestQueue;
public SwipeRefreshLayout swipeRefreshLayout;
private List<Songs> listSongs;
private RecyclerView recyclerView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipedown);
    listSongs = new ArrayList<>();
    recyclerView = findViewById(R.id.recycleviewid);
    swipeRefreshLayout.setColorSchemeResources(R.color.swipe1, R.color.swipe2, R.color.swipe3);
    swipeRefreshLayout.setOnRefreshListener(this);
    swipeRefreshLayout.post(new Runnable() {
        @Override
        public void run() {
            jsonRequest();
        }
    });

}

private void jsonRequest() {

    swipeRefreshLayout.setRefreshing(true);

    request = new JsonArrayRequest(URL_Data, new Response.Listener<JSONArray>() {
        @Override
        public void onResponse(JSONArray response) {
            JSONObject jsonObject = null;

            for (int i = 0; i < response.length(); i++) {

                try {
                    jsonObject = response.getJSONObject(i);
                    Songs songs = new Songs();
                    songs.setJudul(jsonObject.getString("judul"));
                    songs.setArtis(jsonObject.getString("artis"));
                    songs.setLagu(jsonObject.getString("lagu"));
                    songs.setGambar(jsonObject.getString("gambar"));
                    listSongs.add(songs);
                } catch (JSONException e) {
                    e.printStackTrace();
                }

            }

            setRecyclerView(listSongs);
            swipeRefreshLayout.setRefreshing(false);

        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

        }
    });

    requestQueue = Volley.newRequestQueue(MainActivity.this);
    requestQueue.add(request);
}

private void setRecyclerView(List<Songs> listSongs) {

    RecyclerViewAdapter myadapter = new RecyclerViewAdapter(this, listSongs);
    recyclerView.setLayoutManager(new LinearLayoutManager(this));

    recyclerView.setAdapter(myadapter);
}

@Override
public void onRefresh() {
    listSongs.clear();
    jsonRequest();
}

公共类MusicPlayer扩展了AppCompatActivity {

private MediaPlayer playerMusic = null;

private int musicPosition = 0;
private Button buttonplay, buttonnext;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_music_player);

    String judul = getIntent().getExtras().getString("wap_judul");
    String artis = getIntent().getExtras().getString("wap_artis");

    buttonplay = findViewById(R.id.play);
    buttonnext = findViewById(R.id.next);
    TextView tv_judul = findViewById(R.id.judul_lagu);
    TextView tv_artis = findViewById(R.id.artis);

    tv_judul.setText(judul);
    tv_artis.setText(artis);

    buttonnext.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

        }
    });

    buttonplay.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            playpause();
        }
    });

}

private void playpause() {
    if(playerMusic == null){
        playerload();
    }

    if(!playerMusic.isPlaying()) {
        if(musicPosition > 0 ){
            playerMusic.seekTo(musicPosition);
        }
        buttonplay.setBackgroundResource(R.drawable.pause);
        playerMusic.start();
        playlagi();
    } else {
        pausemusic();
    }
}

private void playerload() {
    String lagu = getIntent().getExtras().getString("wap_lagu");
    playerMusic = new MediaPlayer();

    try{
        playerMusic.setAudioStreamType(AudioManager.STREAM_MUSIC);
        playerMusic.setDataSource(lagu);
        playerMusic.prepare();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

private void playlagi() {
    playerMusic.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mediaPlayer) {
            if(playerMusic != null){
                buttonplay.setBackgroundResource(R.drawable.play);
                musicPosition = 0;
                playerMusic.stop();
                playerMusic.release();
                playerMusic = null;
            }
        }
    });
}

private void pausemusic() {
    buttonplay.setBackgroundResource(R.drawable.play);
    playerMusic.pause();
    musicPosition = playerMusic.getCurrentPosition();
}