我如何在标记中显示地点的名称？

Question

我在试着在Marker里显示那个地方的名字。我正在应用某人的代码，并想改变价格到名称。

我试着改变一些台词，但结果不是我想要的。

>

MarkerFromlatLong2.java

 public class MarkerFromLatLong2 extends FragmentActivity implements   OnMapReadyCallback, GoogleMap.OnMarkerClickListener, GoogleMap.OnMapClickListener {


String myJSON;
public static final String TAG_RESULTS = "result";
public static final String TAG_LAT = "lat";
public static final String TAG_LON = "lon";
String lat;
String lon;
String price;
char a, b, c, d, e;

JSONArray reservedtimes = null;

ArrayList<HashMap<String, String>> latlonList;

Marker selectedMarker;
View marker_root_view;
TextView tv_marker;
public GoogleMap mMap;
final Context context = this;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_maps);
    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);

    lat = new String();
    lon = new String();
    myJSON = new String();
    latlonList = new ArrayList<HashMap<String, String>>();
    getData("http://MY ADDRESS/getdata.php");
}

public void getData(String url) {
    class GetDataJSON extends AsyncTask<String, Void, String> {

        @Override
        public String doInBackground(String... params) {

            String uri = params[0];

            BufferedReader bufferedReader = null;
            try {
                URL url = new URL(uri);
                HttpURLConnection con = (HttpURLConnection) url.openConnection();
                StringBuilder sb = new StringBuilder();

                bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));

                String json;
                while ((json = bufferedReader.readLine()) != null) {
                    sb.append(json + "\n");
                }

                return sb.toString().trim();

            } catch (Exception e) {
                return null;
            }
        }

        @Override
        public void onPostExecute(String result) {
            myJSON = result;
            showList();
        }
    }
    GetDataJSON g = new GetDataJSON();
    g.execute(url);
}


public void showList() {
    try {
        JSONObject jsonObj = new JSONObject(myJSON);
        reservedtimes = jsonObj.getJSONArray(TAG_RESULTS);

        for (int i = 0; i < reservedtimes.length(); i++) {
            JSONObject c = reservedtimes.getJSONObject(i);
            lat = c.getString(TAG_LAT);
            lon = c.getString(TAG_LON);

            HashMap<String, String> location = new HashMap<>();

            location.put(TAG_LAT, lat);
            location.put(TAG_LON, lon);

            latlonList.add(location);

        }
    } catch (JSONException e) {
        e.printStackTrace();
    }
}//여기까지

@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;

    mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(37.546167, 126.964673), 16));
    mMap.setOnMarkerClickListener(this);
    mMap.setOnMapClickListener(this);

    setCustomMarkerView();
    getSampleMarkerItems();
}


public void setCustomMarkerView() {
    marker_root_view = LayoutInflater.from(this).inflate(R.layout.marker_layout, null);
    tv_marker = (TextView) marker_root_view.findViewById(R.id.tv_marker);
}

public void getSampleMarkerItems() {
    ArrayList<MarkerItem> sampleList = new ArrayList();

    /*sampleList.add(new MarkerItem(Double.valueOf(lat), Double.valueOf(lon), 1906));

    sampleList.add(new MarkerItem(37.546167, 126.96568, 1906));
    sampleList.add(new MarkerItem(37.538523, 126.96568, 2500000));
    sampleList.add(new MarkerItem(37.527523, 126.96568, 100000));
    sampleList.add(new MarkerItem(37.549523, 126.96568, 15000));
    sampleList.add(new MarkerItem(37.538523, 126.95768, 5000));*/

    Intent intent = getIntent();

    Double latitude = intent.getDoubleExtra("lat", 000.000000D);
    Double longitude = intent.getDoubleExtra("lon", 000.000000D);
    Character price = intent.getCharExtra("price", (char) 123);

    sampleList.add(new MarkerItem(latitude, longitude, price));

    //sampleList.add(new MarkerItem(37.546167, 126.964673, 1906));
    sampleList.add(new MarkerItem(37.538523, 126.96568, b));
    sampleList.add(new MarkerItem(37.527523, 126.96568, c));
    sampleList.add(new MarkerItem(37.549523, 126.96568, d));
    sampleList.add(new MarkerItem(37.538523, 126.95768, e));

    for (MarkerItem markerItem : sampleList) {
        addMarker(markerItem, false);
    }
}
//get the lat and lon in order
//


public Marker addMarker(MarkerItem markerItem, boolean isSelectedMarker) {

    LatLng position = new LatLng(markerItem.getLat(), markerItem.getLon());

    char price = markerItem.getPrice();
    //String formatted = NumberFormat.getInstance().format((price)); //only shows 0(zero)
    //String formatted = String.format(String.valueOf(price)); //shows nothing(blank) in marker
    String formatted = NumberFormat.getInstance().format((price)); //only shows 0(zero)

    tv_marker.setText(formatted);

    if (isSelectedMarker) {
        tv_marker.setBackgroundResource(R.drawable.ic_marker_phone_blue);
        tv_marker.setTextColor(Color.WHITE);
    } else {
        tv_marker.setBackgroundResource(R.drawable.ic_marker_phone);
        tv_marker.setTextColor(Color.BLACK);
    }

    MarkerOptions markerOptions = new MarkerOptions();
    //markerOptions.title(Integer.toString(price)); // If I delete or change the code, the app stops after I click the marker.
    markerOptions.title(Integer.toString(price)); // If I delete or change the code, the app stops after I click the marker.
    markerOptions.position(position);
    markerOptions.icon(BitmapDescriptorFactory.fromBitmap(createDrawableFromView(this, marker_root_view)));

    return mMap.addMarker(markerOptions);

}


// change the View to Bitmap
public Bitmap createDrawableFromView(Context context, View view) {

    DisplayMetrics displayMetrics = new DisplayMetrics();
    ((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
    view.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
    view.measure(displayMetrics.widthPixels, displayMetrics.heightPixels);
    view.layout(0, 0, displayMetrics.widthPixels, displayMetrics.heightPixels);
    view.buildDrawingCache();
    Bitmap bitmap = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(), Bitmap.Config.ARGB_8888);

    Canvas canvas = new Canvas(bitmap);
    view.draw(canvas);

    return bitmap;
}

public Marker addMarker(Marker marker, boolean isSelectedMarker) {
    double lat = marker.getPosition().latitude;
    double lon = marker.getPosition().longitude;
    char price = (char) Integer.parseInt(marker.getTitle());
    MarkerItem temp = new MarkerItem(lat, lon, price);
    return addMarker(temp, isSelectedMarker);

}

@Override
public boolean onMarkerClick(Marker marker) { //If I click a marker, move my center position to equal the marker's position.

    CameraUpdate center = CameraUpdateFactory.newLatLng(marker.getPosition());
    mMap.animateCamera(center);

    changeSelectedMarker(marker);

    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
    alertDialogBuilder.setTitle("SP #1")
            .setMessage("Want to reserve?\n")
            .setCancelable(false)
            .setPositiveButton("Reserve",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            //Moving to the reservation screen
                            Intent intent = new Intent(MarkerFromLatLong2.this, ReserveActivity.class);
                            startActivity(intent);
                        }
                    })
            .setNegativeButton("Cancel",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            //cancel the dialog
                            dialog.cancel();
                        }
                    });
    //make a dialog
    AlertDialog alertDialog = alertDialogBuilder.create();
    alertDialog.show();
    return true;
}

public void changeSelectedMarker(Marker marker) {
    // return the marker which was selected by user
    if (selectedMarker != null) {
        addMarker(selectedMarker, false);
        selectedMarker.remove();
    }

    // point the marker selected
    if (marker != null) {
        selectedMarker = addMarker(marker, true);
        marker.remove();
    }
}

@Override
public void onMapClick(LatLng latLng) {
    changeSelectedMarker(null);
}
} //If user clicks the map where the marker doesn't exist, the map turns back to the starting status.

public class MarkerItem {
 double lat;
double lon;
char price;

public MarkerItem(double lat, double lon, char price) {
    this.lat = lat;
    this.lon = lon;
    this.price = price;
}

public double getLat() {
    return lat;
}

public void setLat(double lat) {
    this.lat = lat;
}

public double getLon() {
    return lon;
}

public void setLon(double lon) {
    this.lon = lon;
}

public char getPrice() {
    return price;
}

public void setPrice(char price) {
    this.price = price;
}


 }

Answer 1

我想这会对你有用的链接。您可以简单地实现接口Google.InfoWindowAdapter，该接口具有名为getInfoContents（Marker Marker）的方法。在这个方法中，膨胀布局，在其中你要放关于所选标记的信息。

我在很多项目中都用过这个。

p.s.对不起，英语不好