本篇實作adapter，共有2個adapter，可寫在同一個class中，也可實作在其他的class

首先實作item，分為待選擇清單中的item，以及已選擇清單中的item

musiclist_recyclerview_item.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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="50dp"
    android:background="@drawable/brownline">

    <HorizontalScrollView
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@drawable/brownline"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/guideline142"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <TextView
            android:id="@+id/tv_music_item"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:gravity="center"
            android:text=""
            android:textColor="@color/black"
            android:textStyle="bold" />
    </HorizontalScrollView>

    <Button
        android:id="@+id/btn_music_item"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@drawable/red_right"
        android:gravity="center"
        android:textColor="@color/white"
        android:textStyle="bold"
        app:backgroundTint="@null"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="@+id/guideline142"
        app:layout_constraintTop_toTopOf="parent" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline142"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.75" />

</androidx.constraintlayout.widget.ConstraintLayout>

select_musiclist_recyclerview_item.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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="50dp"
    android:background="@drawable/brownline">

    <HorizontalScrollView
        android:id="@+id/horizontalScrollView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@drawable/brownline"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/guideline139"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <TextView
            android:id="@+id/tv_music_item"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:text=""
            android:textColor="@color/black"
            android:textStyle="bold" />
    </HorizontalScrollView>

    <Button
        android:id="@+id/btn_music_item"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@drawable/red_left"
        android:gravity="center"
        android:textColor="@color/white"
        android:textStyle="bold"
        app:backgroundTint="@null"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="@+id/guideline139"
        app:layout_constraintTop_toTopOf="parent" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline139"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.75" />
</androidx.constraintlayout.widget.ConstraintLayout>

MusicListAdapter

使用setAllMusicList()及setSelectMusicList()刷新介面

public class MusicListAdapter extends RecyclerView.Adapter<MusicListAdapter.MusicListViewHolder> {
        @NonNull
        @Override
        public MusicListAdapter.MusicListViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.musiclist_recyclerview_item, parent, false);
            return new MusicListViewHolder(view);
        }

        @Override
        public void onBindViewHolder(@NonNull MusicListAdapter.MusicListViewHolder holder, int position) {
            holder.tv_music_item.setText(String.valueOf(musicData.musicName[position]));

            if(musicList.contains(position)){
                holder.btn_music_item.setVisibility(View.INVISIBLE);
            }else{
                holder.btn_music_item.setVisibility(View.VISIBLE);
            }

            holder.btn_music_item.setOnClickListener(v ->{
                musicList.add(position);
                holder.btn_music_item.setEnabled(false);
                setAllMusicList();
                setSelectMusicList();
            });
        }

        @Override
        public int getItemCount() {
            return musicData.musicName.length;
        }

        public class MusicListViewHolder extends RecyclerView.ViewHolder {
            private TextView tv_music_item;
            private Button btn_music_item;
            public MusicListViewHolder(@NonNull View itemView) {
                super(itemView);
                tv_music_item = itemView.findViewById(R.id.tv_music_item);
                btn_music_item = itemView.findViewById(R.id.btn_music_item);
            }
        }
    }

SelectMusicListAdapter

public class SelectMusicListAdapter extends RecyclerView.Adapter<SelectMusicListAdapter.SelectMusicListViewHolder> {
        @NonNull
        @Override
        public SelectMusicListAdapter.SelectMusicListViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.select_musiclist_recyclerview_item, parent, false);
            return new SelectMusicListAdapter.SelectMusicListViewHolder(view);
        }

        @Override
        public void onBindViewHolder(@NonNull SelectMusicListAdapter.SelectMusicListViewHolder holder, int position) {
            if (musicList.size() != 0 && musicList != null) {
                holder.tv_music_item.setText(String.valueOf(musicData.musicName[(int) musicList.get(position)]));
                holder.btn_music_item.setOnClickListener(v ->{
                    musicList.remove(position);
                    setAllMusicList();
                    setSelectMusicList();
                });
            }
        }

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

        public class SelectMusicListViewHolder extends RecyclerView.ViewHolder {
            private TextView tv_music_item;
            private Button btn_music_item;

            public SelectMusicListViewHolder(@NonNull View itemView) {
                super(itemView);
                tv_music_item = itemView.findViewById(R.id.tv_music_item);
                btn_music_item = itemView.findViewById(R.id.btn_music_item);
            }
        }
    }

再來就是增加棋盤顏色及音樂到專案中，分為ColorData及MusicData

ColorData

這裡的board1、2、3是整張棋盤的圖片，建議可使用像素圖生成網站繪製

public class ColorData {
    public int[] light_color = {
            R.drawable.lightbrownbackground_grayline,
            R.drawable.lightgreenbackground_grayline,
            R.drawable.lightbluebackground_grayline
    };
    public int[] dark_color = {
            R.drawable.darkbrownbackground_grayline,
            R.drawable.darkgreenbackground_grayline,
            R.drawable.darkbluebackground_grayline
    };
    public int[] colorImage = {
            R.drawable.board1,
            R.drawable.board2,
            R.drawable.board3
    };
}

MusicData

public class MusicData {
    public int[] music = {
            R.raw.spring, //四季小提琴協奏曲<春>
            R.raw.summer, //四季小提琴協奏曲<夏>
            R.raw.autumn, //四季小提琴協奏曲<秋>
            R.raw.winter  //四季小提琴協奏曲<冬>
    };
    public String[] musicName = {
            "四季小提琴協奏曲<春>",
            "四季小提琴協奏曲<夏>",
            "四季小提琴協奏曲<秋>",
            "四季小提琴協奏曲<冬>"
    };
}

添加音訊

值得注意的是，我們需要自行增添.mp3檔在raw資料夾中，才能抓取到音訊資料

這樣就可以正常選擇音樂及顏色並傳值到其他頁面了

成果: