用android studio 做一个旅游景点介绍完整版代码

以下是一个简单的旅游景点介绍应用程序的完整版代码。请注意，这个应用程序只是一个示例，你可以根据自己的需要进行修改和扩展。

1. MainActivity.java

public class MainActivity extends AppCompatActivity {

    private RecyclerView mRecyclerView;
    private RecyclerView.Adapter mAdapter;
    private RecyclerView.LayoutManager mLayoutManager;
    private List<TouristAttraction> mTouristAttractions;
    private TouristAttractionDBHelper mDBHelper;
    private MenuItem mSearchItem;
    private SearchView mSearchView;

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

        mRecyclerView = findViewById(R.id.recycler_view);
        mRecyclerView.setHasFixedSize(true);

        mLayoutManager = new LinearLayoutManager(this);
        mRecyclerView.setLayoutManager(mLayoutManager);

        mDBHelper = new TouristAttractionDBHelper(this);
        mTouristAttractions = mDBHelper.getAllTouristAttractions();

        mAdapter = new TouristAttractionAdapter(mTouristAttractions);
        mRecyclerView.setAdapter(mAdapter);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);

        mSearchItem = menu.findItem(R.id.action_search);
        mSearchView = (SearchView) mSearchItem.getActionView();
        mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                return false;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                mAdapter.getFilter().filter(newText);
                return true;
            }
        });

        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

2. TouristAttraction.java

public class TouristAttraction {

    private int mId;
    private String mName;
    private String mDescription;
    private double mLatitude;
    private double mLongitude;
    private int mImageResourceId;

    public TouristAttraction(int id, String name, String description, double latitude, double longitude, int imageResourceId) {
        mId = id;
        mName = name;
        mDescription = description;
        mLatitude = latitude;
        mLongitude = longitude;
        mImageResourceId = imageResourceId;
    }

    public int getId() {
        return mId;
    }

    public void setId(int id) {
        mId = id;
    }

    public String getName() {
        return mName;
    }

    public void setName(String name) {
        mName = name;
    }

    public String getDescription() {
        return mDescription;
    }

    public void setDescription(String description) {
        mDescription = description;
    }

    public double getLatitude() {
        return mLatitude;
    }

    public void setLatitude(double latitude) {
        mLatitude = latitude;
    }

    public double getLongitude() {
        return mLongitude;
    }

    public void setLongitude(double longitude) {
        mLongitude = longitude;
    }

    public int getImageResourceId() {
        return mImageResourceId;
    }

    public void setImageResourceId(int imageResourceId) {
        mImageResourceId = imageResourceId;
    }
}

3. TouristAttractionAdapter.java

public class TouristAttractionAdapter extends RecyclerView.Adapter<TouristAttractionAdapter.TouristAttractionViewHolder> implements Filterable {

    private List<TouristAttraction> mTouristAttractions;
    private List<TouristAttraction> mTouristAttractionsFiltered;

    public static class TouristAttractionViewHolder extends RecyclerView.ViewHolder {
        public CardView mCardView;
        public TextView mNameTextView;
        public TextView mDescriptionTextView;
        public ImageView mImageView;

        public TouristAttractionViewHolder(View itemView) {
            super(itemView);
            mCardView = itemView.findViewById(R.id.card_view);
            mNameTextView = itemView.findViewById(R.id.name_text_view);
            mDescriptionTextView = itemView.findViewById(R.id.description_text_view);
            mImageView = itemView.findViewById(R.id.image_view);
        }
    }

    public TouristAttractionAdapter(List<TouristAttraction> touristAttractions) {
        mTouristAttractions = touristAttractions;
        mTouristAttractionsFiltered = touristAttractions;
    }

    @Override
    public TouristAttractionViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_view_layout, parent, false);
        TouristAttractionViewHolder vh = new TouristAttractionViewHolder(v);
        return vh;
    }

    @Override
    public void onBindViewHolder(TouristAttractionViewHolder holder, int position) {
        final TouristAttraction touristAttraction = mTouristAttractionsFiltered.get(position);

        holder.mNameTextView.setText(touristAttraction.getName());
        holder.mDescriptionTextView.setText(touristAttraction.getDescription());
        holder.mImageView.setImageResource(touristAttraction.getImageResourceId());

        holder.mCardView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(v.getContext(), TouristAttractionActivity.class);
                intent.putExtra("id", touristAttraction.getId());
                v.getContext().startActivity(intent);
            }
        });
    }

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

    @Override
    public Filter getFilter() {
        return new Filter() {
            @Override
            protected FilterResults performFiltering(CharSequence constraint) {
                String filterString = constraint.toString().toLowerCase();

                FilterResults results = new FilterResults();

                final List<TouristAttraction> list = mTouristAttractions;

                int count = list.size();
                final ArrayList<TouristAttraction> nlist = new ArrayList<>(count);

                TouristAttraction filterableTouristAttraction;

                for (int i = 0; i < count; i++) {
                    filterableTouristAttraction = list.get(i);
                    if (filterableTouristAttraction.getName().toLowerCase().contains(filterString)) {
                        nlist.add(filterableTouristAttraction);
                    }
                }

                results.values = nlist;
                results.count = nlist.size();

                return results;
            }

            @Override
            protected void publishResults(CharSequence constraint, FilterResults results) {
                mTouristAttractionsFiltered = (ArrayList<TouristAttraction>) results.values;
                notifyDataSetChanged();
            }
        };
    }
}

4. TouristAttractionDBHelper.java

public class TouristAttractionDBHelper extends SQLiteOpenHelper {

    private static final int DATABASE_VERSION = 1;
    private static final String DATABASE_NAME = "TouristAttractionDB";
    private static final String TABLE_NAME = "TouristAttractions";
    private static final String COLUMN_ID = "_id";
    private static final String COLUMN_NAME = "name";
    private static final String COLUMN_DESCRIPTION = "description";
    private static final String COLUMN_LATITUDE = "latitude";
    private static final String COLUMN_LONGITUDE = "longitude";
    private static final String COLUMN_IMAGE_RESOURCE_ID = "image_resource_id";

    private static final String CREATE_TABLE =
            "CREATE TABLE " + TABLE_NAME + " (" +
                    COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
                    COLUMN_NAME + " TEXT, " +
                    COLUMN_DESCRIPTION + " TEXT, " +
                    COLUMN_LATITUDE + " REAL, " +
                    COLUMN_LONGITUDE + " REAL, " +
                    COLUMN_IMAGE_RESOURCE_ID + " INTEGER)";

    private static final String DROP_TABLE =
            "DROP TABLE IF EXISTS " + TABLE_NAME;

    private Context mContext;

    public TouristAttractionDBHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
        mContext = context;
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(CREATE_TABLE);

        Resources res = mContext.getResources();
        String[] names = res.getStringArray(R.array.tourist_attraction_names);
        String[] descriptions = res.getStringArray(R.array.tourist_attraction_descriptions);
        double[] latitudes = res.getFloatArray(R.array.tourist_attraction_latitudes);
        double[] longitudes = res.getFloatArray(R.array.tourist_attraction_longitudes);
        TypedArray imageResourceIds = res.obtainTypedArray(R.array.tourist_attraction_image_resource_ids);

        ContentValues contentValues = new ContentValues();

        for (int i = 0; i < names.length; i++) {
            contentValues.put(COLUMN_NAME, names[i]);
            contentValues.put(COLUMN_DESCRIPTION, descriptions[i]);
            contentValues.put(COLUMN_LATITUDE, latitudes[i]);
            contentValues.put(COLUMN_LONGITUDE, longitudes[i]);
            contentValues.put(COLUMN_IMAGE_RESOURCE_ID, imageResourceIds.getResourceId(i, -1));

            db.insert(TABLE_NAME, null, contentValues);
        }

        imageResourceIds.recycle();
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL(DROP_TABLE);
        onCreate(db);
    }

    public List<TouristAttraction> getAllTouristAttractions() {
        List<TouristAttraction> touristAttractions = new ArrayList<>();

        SQLiteDatabase db = this.getReadableDatabase();

        Cursor cursor = db.query(TABLE_NAME, null, null, null, null, null, null);

        if (cursor.moveToFirst()) {
            do {
                int id = cursor.getInt(cursor.getColumnIndex(COLUMN_ID));
                String name = cursor.getString(cursor.getColumnIndex(COLUMN_NAME));
                String description = cursor.getString(cursor.getColumnIndex(COLUMN_DESCRIPTION));
                double latitude = cursor.getDouble(cursor.getColumnIndex(COLUMN_LATITUDE));
                double longitude = cursor.getDouble(cursor.getColumnIndex(COLUMN_LONGITUDE));
                int imageResourceId = cursor.getInt(cursor.getColumnIndex(COLUMN_IMAGE_RESOURCE_ID));

                touristAttractions.add(new TouristAttraction(id, name, description, latitude, longitude, imageResourceId));
            } while (cursor.moveToNext());
        }

        cursor.close();
        db.close();

        return touristAttractions;
    }

    public TouristAttraction getTouristAttractionById(int id) {
        TouristAttraction touristAttraction = null;

        SQLiteDatabase db = this.getReadableDatabase();

        Cursor cursor = db.query(TABLE_NAME, null, COLUMN_ID + " = ?", new String[]{String.valueOf(id)}, null, null, null);

        if (cursor.moveToFirst()) {
            String name = cursor.getString(cursor.getColumnIndex(COLUMN_NAME));
            String description = cursor.getString(cursor.getColumnIndex(COLUMN_DESCRIPTION));
            double latitude = cursor.getDouble(cursor.getColumnIndex(COLUMN_LATITUDE));
            double longitude = cursor.getDouble(cursor.getColumnIndex(COLUMN_LONGITUDE));
            int imageResourceId = cursor.getInt(cursor.getColumnIndex(COLUMN_IMAGE_RESOURCE_ID));

            touristAttraction = new TouristAttraction(id, name, description, latitude, longitude, imageResourceId);
        }

        cursor.close();
        db.close();

        return touristAttraction;
    }
}

5. TouristAttractionActivity.java

public class TouristAttractionActivity extends AppCompatActivity {

    private TouristAttractionDBHelper mDBHelper;
    private TouristAttraction mTouristAttraction;

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

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        int id = getIntent().getIntExtra("id", -1);

        mDBHelper = new TouristAttractionDBHelper(this);
        mTouristAttraction = mDBHelper.getTouristAttractionById(id);

        ImageView imageView = findViewById(R.id.image_view);
        TextView nameTextView = findViewById(R.id.name_text_view);
        TextView descriptionTextView = findViewById(R.id.description_text_view);

        imageView.setImageResource(mTouristAttraction.getImageResourceId());
        nameTextView.setText(mTouristAttraction.getName());
        descriptionTextView.setText(mTouristAttraction.getDescription());

        MapView mapView = findViewById(R.id.map_view);
        mapView.onCreate(savedInstanceState);
        mapView.getMapAsync(new OnMapReadyCallback() {
            @Override
            public void onMapReady(GoogleMap googleMap) {
                LatLng location = new LatLng(mTouristAttraction.getLatitude(), mTouristAttraction.getLongitude());
                googleMap.addMarker(new MarkerOptions().position(location).title(mTouristAttraction.getName()));
                googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(location, 16));
            }
        });
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        if (id == android.R.id.home) {
            onBackPressed();
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onResume() {
        super.onResume();
        MapView mapView = findViewById(R.id.map_view);
        mapView.onResume();
    }

    @Override
    public void onPause() {
        super.onPause();
        MapView mapView = findViewById(R.id.map_view);
        mapView.onPause();
    }

    @Override
    public void