Recyclerview内でヘッダーを作成する必要があります

Question

スポーツサイト用のアプリを作成し、カレンダーイベントを作成する必要があります。私が理解できない細部があります：各ゲームの近くで指定されていないトーナメントの名前を表示するためのRecyclerview内のヘッダーの作成方法（画面上の例 "Примера"）。

私の仕事用のライブラリまたはとにかくはありますか？私は多くの静的なRecyclerviewを作成し、アジャイルな方法を見つけることを望んでいません。

もちろん、カレンダーには多くのトーナメントがあるので、ヘッダーは同じにする必要があります。

カレンダーの主なクラス：セッターとゲッターについて

public class FootballResults extends Fragment implements 
View.OnClickListener, DatePickerDialog.OnDateSetListener{ 

private LinearLayoutManager linLM; 
private FootballResultsAdapter adapter; 
private ArrayList<FootballResultsData> dl; 

String today_day; 
String today_month; 
String today_year; 
String mDay; 
String mMonth; 
String mYear; 

Button arrow_left; 
Button arrow_right; 
Button datepicker; 

Switch swLive; 

int n = 0; 
//int n_plus = 1; 

@SuppressLint("SetTextI18n") 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    View rv = inflater.inflate(R.layout.results_football, container, false); 

    RecyclerView footballresults_feed1 = (RecyclerView) rv.findViewById(R.id.rcMatch1); 

    dl = new ArrayList<>(); 

    footballresults_feed1.setLayoutManager(new LinearLayoutManager(getActivity())); 
    adapter = new FootballResultsAdapter(getActivity(), dl); 
    footballresults_feed1.setAdapter(adapter); 

    arrow_left = (Button)rv.findViewById(R.id.arrow_left); 
    arrow_right = (Button)rv.findViewById(R.id.arrow_right); 
    datepicker = (Button)rv.findViewById(R.id.btnDatepick); 
    swLive = (Switch)rv.findViewById(R.id.swLive); 

    arrow_left.setOnClickListener(this); 
    arrow_right.setOnClickListener(this); 

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

    swLive.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { 
     @Override 
     public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { 
      if (isChecked) {swLive.setText("");} 
      else {swLive.setText("");} 
     } 
    }); 

    currenttime(); 
    datepicker.setText(Integer.parseInt(mDay)+" "+TimeFormat.monthDef(Integer.parseInt(mMonth))+" "+mYear); 

    ResultDisplay(); 

    return rv; 
} 

private void ResultDisplay() { 
    @SuppressLint("StaticFieldLeak") AsyncTask<Integer, Void, Void> task = new AsyncTask<Integer, Void, Void>() { 
     @Override 
     protected Void doInBackground(Integer... integers) { 

      ResultFeed(); 

      return null; 
     } 

     @Override 
     protected void onPostExecute(Void aVoid) { 

      adapter.notifyDataSetChanged(); 
     } 
    }; 
    task.execute(); 
} 

void ResultFeed(){ 
    OkHttpClient client = new OkHttpClient(); 
    okhttp3.Request request = new okhttp3.Request.Builder() 
      .url(C.RESULT_API+mYear+"/"+mMonth+"/"+mDay+"?sport_id=1") 
      .build(); 
    try { 
     okhttp3.Response response = client.newCall(request).execute(); 
     JSONObject object = new JSONObject(response.body().string()); 

     dl.clear(); 
     JSONArray sports = object.getJSONArray("sports"); 
     JSONObject tournament0 = sports.getJSONObject(0); 

     JSONArray tournament = tournament0.getJSONArray("tournaments"); 
     for (int i=0; i<tournament.length(); i++){ 
      JSONObject matches1 = tournament.getJSONObject(i); 
      Log.i (C.T, "Турнир: "+matches1.getString("tournament_name")); 
      JSONArray matches0 = matches1.getJSONArray("matches"); 
      for (int j=0; j<matches0.length(); j++) { 
       JSONObject matches = matches0.getJSONObject(j); 

       String match_time = TimeFormat.TimeRadar(matches.getString("date_of_match")); //время начала матча 
       String match_res = matches.getString("ft_value"); 
       String match_status = matches.getString("status"); 

       if (match_res.equals("null")) {match_res = "-:-";} 
       if (match_status.equals("Не начался")) {match_status = "";} 
       if (match_status.equals("null")) {match_status = "";} 

       JSONObject team_home1 = matches.getJSONObject("team_home"); 
       String team_home = team_home1.getString("short_name"); 
       String team_home_logo = team_home1.getString("logo_small"); 

       JSONObject team_away1 = matches.getJSONObject("team_away"); 
       String team_away = team_away1.getString("short_name"); 
       String team_away_logo = team_away1.getString("logo_small"); 

       FootballResultsData data = new FootballResultsData(matches1.getString("tournament_name"), 
         match_time, 
         match_res, 
         team_home, team_away, 
         match_status, 
         team_home_logo, 
         team_away_logo); 
      dl.add(data); 
     }} 

    } catch (IOException e) { 
     e.printStackTrace(); 
    } catch (JSONException e) { 
     e.printStackTrace(); 
    } catch (ParseException e) { 
     e.printStackTrace(); 
    } 
} 

@SuppressLint("SimpleDateFormat") 
void currenttime() { 
    long date_today = System.currentTimeMillis(); 
    today_day = new SimpleDateFormat("dd").format(date_today); 
    today_month = new SimpleDateFormat("MM").format(date_today); 
    today_year = new SimpleDateFormat("yyyy").format(date_today); 
    mDay = today_day; mMonth = today_month; mYear = today_year; 
} 

@SuppressLint("SimpleDateFormat") 
void calendar (String dd, String mm, String yyyy, int day_n) { 
    String sourceDate = yyyy+"-"+mm+"-"+dd; 
    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd"); 
    Date myDate; 
    try { 
     myDate = format.parse(sourceDate); 
     myDate = DateUtil.addDays(myDate, day_n); 
     String mDate = new SimpleDateFormat("dd MM yyyy").format(new SimpleDateFormat("EEE MMM dd kk:mm:ss zzzz yyyy").parse(myDate.toString())); 
     mDay = new SimpleDateFormat("dd").format(new SimpleDateFormat("dd MM yyyy").parse(mDate)); 
     mMonth = new SimpleDateFormat("MM").format(new SimpleDateFormat("dd MM yyyy").parse(mDate)); 
     mYear = new SimpleDateFormat("yyyy").format(new SimpleDateFormat("dd MM yyyy").parse(mDate)); 
     Log.i(C.T, mDate); 
    } catch (ParseException e) { 
     e.printStackTrace(); 
    } 
} 

@SuppressLint("SetTextI18n") 
@Override 
public void onClick(View v) { 
    //currenttime(); 
    switch (v.getId()) { 
     case R.id.arrow_left: {n=n-1; break;} 
     case R.id.arrow_right: {n=n+1; break;} 
     default: break; 
    } 
    calendar(today_day, today_month, today_year, n); 
    datepicker.setText(Integer.parseInt(mDay)+" "+TimeFormat.monthDef(Integer.parseInt(mMonth))+" "+mYear); 
    ResultDisplay(); 
} 

@Override 
public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) { 

} 

void datepickermethod() { 
    DatePickerDialog datepick = new DatePickerDialog(getContext(), new DatePickerDialog.OnDateSetListener() { 
    @SuppressLint("SetTextI18n") 
    @Override 
    public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) { 
     datepicker.setText(dayOfMonth+" "+TimeFormat.monthDef(month+1)+" "+year); 
     mDay = String.valueOf(dayOfMonth); mMonth = String.valueOf(month+1); mYear = String.valueOf(year); 
     n=0; 
     today_day = String.valueOf(dayOfMonth); today_month = String.valueOf(month+1); today_year = String.valueOf(year); 
     ResultDisplay(); 
    } 
     }, Integer.parseInt(today_year), Integer.parseInt(today_month)-1, Integer.parseInt(today_day)); 
    datepick.show(); 
} 
} 

：

class FootballResultsData { 

public FootballResultsData(String tournament_name, String match_time, String match_result, String team_home, String team_away, String match_status, String team_home_logo, String team_away_logo) { 
    this.setTournament_name(tournament_name); 
    this.setMatch_time(match_time); 
    this.setMatch_result(match_result); 
    this.setTeam_home(team_home); 
    this.setTeam_away(team_away); 
    this.setMatch_status(match_status); 
    this.setTeam_home_logo(team_home_logo); 
    this.setTeam_away_logo(team_away_logo); 
} 

private String tournament_name; 
private String match_time; 
private String match_result; 
private String team_home; 
private String team_away; 
private String match_status; 
private String team_home_logo; 
private String team_away_logo; 

public String getMatch_time() { return match_time; } 

public void setMatch_time(String match_time) { 
    this.match_time = match_time; 
} 

public String getTeam_home() { 
    return team_home; 
} 

public void setTeam_home(String team_home) { 
    this.team_home = team_home; 
} 

public String getTeam_away() { 
    return team_away; 
} 

public void setTeam_away(String team_away) { 
    this.team_away = team_away; 
} 

public String getMatch_status() { 
    return match_status; 
} 

public void setMatch_status(String match_status) { 
    this.match_status = match_status; 
} 

public String getMatch_result() { return match_result; } 

public void setMatch_result(String match_result) { this.match_result = match_result; } 

public String getTeam_home_logo() { 
    return team_home_logo; 
} 

public void setTeam_home_logo(String team_home_logo) { 
    this.team_home_logo = team_home_logo; 
} 

public String getTeam_away_logo() { 
    return team_away_logo; 
} 

public void setTeam_away_logo(String team_away_logo) { 
    this.team_away_logo = team_away_logo; 
} 

public String getTournament_name() { 
    return tournament_name; 
} 

public void setTournament_name(String tournament_name) { 
    this.tournament_name = tournament_name; 
} 
} 

Cardview一致の表示のために：

<android.support.v7.widget.CardView 
xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:id="@+id/tournament_result" > 

<RelativeLayout 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingStart="10dp" 
    android:paddingEnd="10dp" 
    android:background="@drawable/newsbody_file"> 

    <TextView 
     android:id="@+id/linebelownews" 
     android:layout_width="match_parent" 
     android:layout_height="1dp" 
     android:background="@color/colorNewsPressed" /> 

    <TextView 
     android:id="@+id/match_time" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_below="@id/linebelownews" 
     android:text="22:00" /> 

    <TextView 
     android:id="@+id/match_status" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentEnd="true" 
     android:layout_alignParentTop="true" 
     android:text="ост." /> 

    <TextView 
     android:id="@+id/match_res" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_centerHorizontal="true" 
     android:layout_below="@id/match_time" 
     android:layout_marginStart="8dp" 
     android:layout_marginEnd="8dp" 
     android:text="2:2" 
     android:textStyle="bold" /> 

    <TextView 
     android:id="@+id/match_th" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_below="@id/match_time" 
     android:layout_marginEnd="5dp" 
     android:layout_toStartOf="@+id/logo_th" 
     android:text="Динамо" 
     android:textAlignment="viewEnd" 
     android:textColor="#000000" /> 

    <TextView 
     android:id="@+id/match_ta" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_marginStart="5dp" 
     android:layout_toEndOf="@+id/logo_ta" 
     android:layout_below="@id/match_time" 
     android:textColor="#000000" 
     android:text="Шахтер" /> 

    <ImageView 
     android:id="@+id/logo_th" 
     android:layout_width="20dp" 
     android:layout_height="20dp" 
     android:layout_toStartOf="@id/match_res" 
     android:layout_below="@+id/match_time" 
     android:contentDescription="logo_th" 
     app:srcCompat="@drawable/author_file" /> 

    <ImageView 
     android:id="@+id/logo_ta" 
     android:layout_width="20dp" 
     android:layout_height="20dp" 
     android:layout_below="@id/match_time" 
     app:srcCompat="@drawable/author_file" 
     android:layout_toEndOf="@id/match_res" 
     android:layout_marginBottom="5dp" 
     android:contentDescription="logo_th" /> 

    <TextView 
     android:id="@+id/tournament_n" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignBottom="@+id/match_status" 
     android:layout_centerHorizontal="true" 
     android:text="@string/name_tournament" /> 
</RelativeLayout> 
</android.support.v7.widget.CardView> 

Recyclerviewと

メインレイアウト：

<RelativeLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:id="@+id/tournament_result"> 

<android.support.v7.widget.RecyclerView 
android:id="@+id/rcMatch1" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" /> 


<RelativeLayout 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:id="@+id/lCalendar"> 
    <Button 
     android:id="@+id/arrow_left" 
     android:layout_width="40dp" 
     android:layout_height="40dp" 
     android:layout_marginTop="5dp" 
     android:layout_toStartOf="@+id/btnDatepick" 
     android:background="@drawable/ic_arrow_left" /> 
    <Button 
     android:id="@+id/arrow_right" 
     android:layout_width="40dp" 
     android:layout_height="40dp" 
     android:layout_marginTop="5dp" 
     android:layout_marginBottom="5dp" 
     android:layout_toEndOf="@+id/btnDatepick" 
     android:background="@drawable/ic_arrow_right" /> 
    <Button 
     android:id="@+id/btnDatepick" 
     android:layout_width="wrap_content" 
     android:layout_height="40dp" 
     android:layout_marginTop="5dp" 
     android:layout_marginBottom="5dp" 
     android:paddingStart="8dp" 
     android:paddingEnd="8dp" 
     android:layout_alignParentTop="true" 
     android:layout_centerHorizontal="true" /> 
    <Switch 
     android:id="@+id/swLive" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentStart="true" 
     android:layout_centerVertical="true" 
     android:layout_marginStart="16dp" /> 
</RelativeLayout> 

</RelativeLayout> 

EDIT

アダプタ：

class FootballResultsAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { 
private Context context; 
private ArrayList<FootballResultsData> footballresults_data = new ArrayList<FootballResultsData>(); 

private static int View_Header = 0; 
private static int View_Item = 1; 

public FootballResultsAdapter(Context context, ArrayList<FootballResultsData> footballresults_data) { 
    this.context = context; 
    this.footballresults_data = footballresults_data; 
} 

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

    RecyclerView.ViewHolder holder = null; 
    if(viewType == View_Item) { 
     View view = LayoutInflater.from(parent.getContext()) 
       .inflate(R.layout.card_match, parent, false); 
     holder = new ViewHolder_item(view); 
    } 
    else if(viewType == View_Header) { 
     View view = LayoutInflater.from(parent.getContext()) 
       .inflate(R.layout.card_tournament, parent, false); 
     holder = new ViewHolder_header(view); 
    } 
    return holder; 
} 

@Override 
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 

    FootballResultsData NFD = footballresults_data.get(position); 
    if (holder instanceof ViewHolder_item) { 
     ((ViewHolder_item) holder).match_time.setText(NFD.getMatch_time()); 
     ((ViewHolder_item) holder).match_result.setText(NFD.getMatch_result()); 
     ((ViewHolder_item) holder).team_home.setText(NFD.getTeam_home()); 
     ((ViewHolder_item) holder).team_away.setText(NFD.getTeam_away()); 
     ((ViewHolder_item) holder).match_status.setText(NFD.getMatch_status()); 
     Glide.with(context).load(NFD.getTeam_home_logo()).into( ((ViewHolder_item) holder).team_home_logo); 
     Glide.with(context).load(NFD.getTeam_away_logo()).into( ((ViewHolder_item) holder).team_away_logo); 
    } 
    else if (holder instanceof ViewHolder_header) { 
     ((ViewHolder_header) holder).tournament_name.setText(NFD.getTournament_name()); 
    } 
} 

@Override 
public int getItemViewType(int position) { 
    super.getItemViewType(position); 
    if(position == 0) { 
     return View_Header; 
    }else { 
     return View_Item; 
    } 
} 

@Override 
public int getItemCount() { 
    return footballresults_data.size()+1; 
} 

public static class ViewHolder_item extends RecyclerView.ViewHolder { 

    public TextView match_time; 
    public TextView match_result; 
    public TextView team_home; 
    public TextView team_away; 
    public TextView match_status; 
    public ImageView team_home_logo; 
    public ImageView team_away_logo; 

    public ViewHolder_item(View itemView) { 
     super(itemView); 
     match_time = (TextView)itemView.findViewById(R.id.match_time); 
     match_result = (TextView)itemView.findViewById(R.id.match_res); 
     team_home = (TextView)itemView.findViewById(R.id.match_th); 
     team_away = (TextView)itemView.findViewById(R.id.match_ta); 
     match_status = (TextView)itemView.findViewById(R.id.match_status); 
     team_home_logo = (ImageView)itemView.findViewById(R.id.logo_th); 
     team_away_logo = (ImageView)itemView.findViewById(R.id.logo_ta); 
    } 
} 

public static class ViewHolder_header extends RecyclerView.ViewHolder { 

    public TextView tournament_name; 

    public ViewHolder_header(View itemView) { 
     super(itemView); 
     tournament_name = (TextView)itemView.findViewById(R.id.tournament_n); 
    } 
} 
} 

Answer 1

上書き位置に基づいて、適切な型を返すと、異なるレイアウトを膨張getItemViewType (int position) onCreateViewHolderのヘッダー用です。アダプタ内

private static int View_Header =0; 
private static int View_Item = 1; 

そして

@Override 
public int getItemViewType (int position) { 
    // position 0 return header type 
    if(position == 0) { 

     return View_Header; 

    }else { 

     return View_Item; 
    } 

} 

そして

// add 1 to the list 
// total items is item in list + 1 for header 
@Override 
public int getItemCount() { 
    return footballresults_data.size()+1; 
} 

そして

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

    RecyclerView.ViewHolder holder = null; 
    if(viewType == View_Item) { 
     View view = LayoutInflater.from(parent.getContext()) 
       .inflate(R.layout.card_match, parent, false); 
     holder = new ViewHolder_Item(view); 

    }else if(viewType == View_Header) { 
     // inflate header layout 
     View view = LayoutInflater.from(parent.getContext()) 
       .inflate(R.layout.header_layout, parent, false); 
     holder = new ViewHolder_header(view); 

    } 
return holder; 
} 

その後

@Override 
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 

    if (holder instanceof ViewHolder) { 
     // bind row items items 

    } 
    // create a separate viewholder class for header 
    else if(holder instanceof ViewHolder_header){ 
     // bind header item 
    } 

あなたは（ヘッダーの下のアイテムをグループ化する）ヘッダーとサブ項目を探しているならhttps://stackoverflow.com/a/42976078/653856を見ています。行に：FootballResultsData NFDは= footballresults_data.get（位置） I：しかし論理は、（無効なインデックス0、サイズが0であるjava.lang.IndexOutOfBoundsException）私はあなたの方法で作ってみましたが、エラーが起こった