建立一个数据库，包含时间，项目，场馆三个字段，插入三条数据。布局有三个spinner，分别代表时间，项目和场馆，当选中不同的选项时，查询数据库显示不同的时间，项目，场馆数据。利用recycleview显示数据。请写出示例代码。

好的，下面是示例代码。

首先是建立数据库的代码，我们使用SQLiteOpenHelper类来实现：

public class MyDatabaseHelper extends SQLiteOpenHelper {

    private static final String DB_NAME = "my_database";
    private static final int DB_VERSION = 1;
    private static final String TABLE_NAME = "my_table";
    private static final String COLUMN_ID = "_id";
    private static final String COLUMN_TIME = "time";
    private static final String COLUMN_PROJECT = "project";
    private static final String COLUMN_VENUE = "venue";

    public MyDatabaseHelper(Context context) {
        super(context, DB_NAME, null, DB_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        String sql = "CREATE TABLE " + TABLE_NAME + " (" +
                COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
                COLUMN_TIME + " TEXT, " +
                COLUMN_PROJECT + " TEXT, " +
                COLUMN_VENUE + " TEXT)";
        db.execSQL(sql);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
        onCreate(db);
    }

    public void insertData(SQLiteDatabase db, String time, String project, String venue) {
        ContentValues values = new ContentValues();
        values.put(COLUMN_TIME, time);
        values.put(COLUMN_PROJECT, project);
        values.put(COLUMN_VENUE, venue);
        db.insert(TABLE_NAME, null, values);
    }

    public Cursor queryData(SQLiteDatabase db, String time, String project, String venue) {
        String[] columns = {COLUMN_TIME, COLUMN_PROJECT, COLUMN_VENUE};
        String selection = COLUMN_TIME + "=? AND " + COLUMN_PROJECT + "=? AND " + COLUMN_VENUE + "=?";
        String[] selectionArgs = {time, project, venue};
        return db.query(TABLE_NAME, columns, selection, selectionArgs, null, null, null);
    }
}

接下来是布局文件，我们使用LinearLayout和Spinner来实现：

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <Spinner
        android:id="@+id/time_spinner"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"/>

    <Spinner
        android:id="@+id/project_spinner"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"/>

    <Spinner
        android:id="@+id/venue_spinner"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"/>

</LinearLayout>

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/recycler_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"/>

然后是RecyclerView的item布局文件，我们使用TextView来显示数据：

<TextView
    android:id="@+id/time_text_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>

<TextView
    android:id="@+id/project_text_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>

<TextView
    android:id="@+id/venue_text_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>

接下来是MainActivity的代码，我们在onCreate方法中初始化布局和数据库，并且设置Spinner的选项和监听器：

public class MainActivity extends AppCompatActivity {

    private Spinner mTimeSpinner;
    private Spinner mProjectSpinner;
    private Spinner mVenueSpinner;
    private RecyclerView mRecyclerView;
    private MyAdapter mAdapter;
    private MyDatabaseHelper mDatabaseHelper;

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

        mTimeSpinner = findViewById(R.id.time_spinner);
        mProjectSpinner = findViewById(R.id.project_spinner);
        mVenueSpinner = findViewById(R.id.venue_spinner);
        mRecyclerView = findViewById(R.id.recycler_view);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        mAdapter = new MyAdapter();
        mRecyclerView.setAdapter(mAdapter);

        mDatabaseHelper = new MyDatabaseHelper(this);
        SQLiteDatabase db = mDatabaseHelper.getWritableDatabase();
        mDatabaseHelper.insertData(db, "10:00", "篮球", "A场馆");
        mDatabaseHelper.insertData(db, "11:00", "足球", "B场馆");
        mDatabaseHelper.insertData(db, "12:00", "乒乓球", "C场馆");

        String[] times = {"10:00", "11:00", "12:00"};
        ArrayAdapter<String> timeAdapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_item, times);
        mTimeSpinner.setAdapter(timeAdapter);

        String[] projects = {"篮球", "足球", "乒乓球"};
        ArrayAdapter<String> projectAdapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_item, projects);
        mProjectSpinner.setAdapter(projectAdapter);

        String[] venues = {"A场馆", "B场馆", "C场馆"};
        ArrayAdapter<String> venueAdapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_item, venues);
        mVenueSpinner.setAdapter(venueAdapter);

        mTimeSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                String time = (String) parent.getItemAtPosition(position);
                String project = (String) mProjectSpinner.getSelectedItem();
                String venue = (String) mVenueSpinner.getSelectedItem();
                Cursor cursor = mDatabaseHelper.queryData(db, time, project, venue);
                mAdapter.swapCursor(cursor);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });

        mProjectSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                String time = (String) mTimeSpinner.getSelectedItem();
                String project = (String) parent.getItemAtPosition(position);
                String venue = (String) mVenueSpinner.getSelectedItem();
                Cursor cursor = mDatabaseHelper.queryData(db, time, project, venue);
                mAdapter.swapCursor(cursor);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });

        mVenueSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                String time = (String) mTimeSpinner.getSelectedItem();
                String project = (String) mProjectSpinner.getSelectedItem();
                String venue = (String) parent.getItemAtPosition(position);
                Cursor cursor = mDatabaseHelper.queryData(db, time, project, venue);
                mAdapter.swapCursor(cursor);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });
    }

    private class MyAdapter extends RecyclerView.Adapter<MyViewHolder> {

        private Cursor mCursor;

        @NonNull
        @Override
        public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
            return new MyViewHolder(view);
        }

        @Override
        public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
            mCursor.moveToPosition(position);
            String time = mCursor.getString(mCursor.getColumnIndex(MyDatabaseHelper.COLUMN_TIME));
            String project = mCursor.getString(mCursor.getColumnIndex(MyDatabaseHelper.COLUMN_PROJECT));
            String venue = mCursor.getString(mCursor.getColumnIndex(MyDatabaseHelper.COLUMN_VENUE));
            holder.timeTextView.setText(time);
            holder.projectTextView.setText(project);
            holder.venueTextView.setText(venue);
        }

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

        public void swapCursor(Cursor cursor) {
            if (mCursor != null) {
                mCursor.close();
            }
            mCursor = cursor;
            notifyDataSetChanged();
        }
    }

    private static class MyViewHolder extends RecyclerView.ViewHolder {

        private TextView timeTextView;
        private TextView projectTextView;
        private TextView venueTextView;

        public MyViewHolder(@NonNull View itemView) {
            super(itemView);
            timeTextView = itemView.findViewById(R.id.time_text_view);
            projectTextView = itemView.findViewById(R.id.project_text_view);
            venueTextView = itemView.findViewById(R.id.venue_text_view);
        }
    }
}

这样就实现了你要求的功能，希望能对你有所帮助！