我正在尝试创建一个显示每所大学的地图的 Android 应用程序 |该地区/附近的学校。我查看了 SO 和 Google，只找到了有关如何添加标记、添加图块或显示特定 lat/lng 的教程，但是有没有办法根据特定参数显示特定标记？例如，如果我想显示所有大学/学校的每个标记，我将如何将这些参数传递给 MapFragment？我没有尝试过任何东西，因为我没有找到任何甚至暗示如何做到这一点的东西，除了对 web 应用程序 api 的引用，它对 Android 特定的 api 没有帮助。
【问题讨论】：
标签： java android google-maps android-studio google-maps-api-3
希望它有助于它的旅行指南应用程序代码
public class SearchPlaceType extends Activity
{
String[] itemTypeName ={
"airport",
"atm",
"bank",
"bus_station",
"gas_station",
"hospital",
"mosque",
"park",
"restaurant",
"university",
"food"
};
ListView listView;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.search_place_type);
listView = (ListView)findViewById(R.id.typeList);
listView.setAdapter(new PlaceTypeAdapter(SearchPlaceType.this, itemTypeName));
listView.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id)
{
Intent intent = new Intent(SearchPlaceType.this,NearByPlaces.class);
intent.putExtra("positionOfType", (int)position);
startActivity(intent);
}
});
}
}
比班级告诉附近的地方
public class NearByPlaces extends Activity
{
ArrayList<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>();
ListView listView;
int positionOfType = 0;
Context context;
MyLocation myLocation;
double current_location_lat, current_location_lng;
public static String latStr = "";
public static String longStr = "";
public static LatLng myLatLng = null;
public static LatLng destinationLatLng = null;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.near_by_places);
context = NearByPlaces.this;
Bundle extras = getIntent().getExtras();
if(extras!=null)
{
positionOfType = extras.getInt("positionOfType", positionOfType);
}
listView = (ListView)findViewById(R.id.nearbyList);
myLocation = new MyLocation(context);
if (myLocation.isLocationAvailable() && myLocation.getUserLocation() != null)
{
current_location_lat = myLocation.getUserLocation().latitude;
current_location_lng = myLocation.getUserLocation().longitude;
latStr = current_location_lat + "";
longStr = current_location_lng + "";
myLatLng = new LatLng(current_location_lat, current_location_lng);
//url = url_part1 + latStr + "," + longStr + url_part2;
Log.d("LATITUDE", String.valueOf(current_location_lat));
Log.d("LONGITUDE", String.valueOf(current_location_lng));
new PlaceTask(context, positionOfType, latStr, longStr, new onTaskDoneListener()
{
@Override
public void onTaskDone(JSONObject jsonObject)
{
if(jsonObject!=null)
{
try
{
JSONObject obj = jsonObject;//new JSONObject(jsonObject);
String status = obj.getString("status");
if(status.equals("OK"))
{
JSONArray arr = obj.getJSONArray("results");
for(int i = 0; i < arr.length(); i++)
{
double lat = arr.getJSONObject(i).getJSONObject("geometry").getJSONObject("location").getDouble("lat");
double lng = arr.getJSONObject(i).getJSONObject("geometry").getJSONObject("location").getDouble("lng");
String place_name = arr.getJSONObject(i).getString("name");
String vicinity = arr.getJSONObject(i).getString("vicinity");
HashMap<String, String> map = new HashMap<String,String>();
map.put("placeName", place_name);
map.put("vicinity", vicinity);
map.put("lat", String.valueOf(lat));
map.put("lng", String.valueOf(lng));
list.add(map);
}
NearByPlaceAdapter adapter = new NearByPlaceAdapter(context, list);
listView.setAdapter(adapter);
}
}
catch (JSONException e)
{
e.printStackTrace();
}
}
else
{
Toast.makeText(context, "Response is Null", Toast.LENGTH_LONG).show();
}
}
}).execute();
//showSearchDialog(map);
}
else
{
Toast.makeText(context, "Please Enable Location Services and GPS From your Device",
Toast.LENGTH_LONG).show();
}
listView.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id)
{
HashMap<String, String> map = list.get(position);
Intent intent = new Intent(context,DirectionActivity3.class);
destinationLatLng = new LatLng(Double.valueOf(map.get("lat")), Double.valueOf(map.get("lat")));
startActivity(intent);
}
});
}
}
使用这个 MapyPane 类绘制标记
public class MapyPane extends Activity implements OnMapReadyCallback
{
String[] itemTypeName ={
"airport",
"atm",
"bank",
"bus_station",
"gas_station",
"hospital",
"mosque",
"park",
"restaurant",
"university",
"food"
};
Marker myMarker;
GMapV2Direction md;
MyLocation myLocation;
GoogleMap googleMap;
double current_location_lat, current_location_lng;
public static String latStr = "";
public static String longStr = "";
Dialog searchDialog;
ImageView searchDialogIv;
ImageView searchIcon;
EditText searchText;
Context context;
Integer[] imageId = {
R.drawable.school_3,
R.drawable.atm_3,
R.drawable.school_3,
R.drawable.police_station_3,
R.drawable.cng_station_3,//5
R.drawable.hospital_3,
R.drawable.school_3,
R.drawable.hospital_3,//8
R.drawable.hotel_3,
R.drawable.cng_station_3,
R.drawable.hotel_3
};
int positionToFind = 0;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = MapyPane.this;
md = new GMapV2Direction();
MapFragment mapFragment = (MapFragment) getFragmentManager()
.findFragmentById(R.id.fragment_map);
mapFragment.getMapAsync(this);
googleMap = mapFragment.getMap();//my doctory..
Bundle extras = getIntent().getExtras();
if(extras!=null)
{
positionToFind = extras.getInt("positionToFind", positionToFind);
}
searchText = (EditText)findViewById(R.id.search_text);
searchDialogIv = (ImageView)findViewById(R.id.search_dialogIv);
searchDialogIv.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
if(googleMap==null)
{
Toast.makeText(context, "Unable to load Map", Toast.LENGTH_LONG).show();
}
else
{
showSearchDialog(googleMap);
}
}
});
searchIcon = (ImageView)findViewById(R.id.search_icon);
searchIcon.setVisibility(View.GONE);
searchText.setVisibility(View.GONE);
searchIcon.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
//if(sear)
new PlaceTask(context, searchText.getText().toString(), latStr, longStr, new onTaskDoneListener()
{
@Override
public void onTaskDone(JSONObject jsonObject)
{
//drawMarkersOnMap(jsonObject, googleMap,postponeEnterTransition());
}
}).execute();
}
});
}
/*public void drawPathBetween(LatLng sourcePosition,LatLng destPosition,GoogleMap mMap)
{
Document doc = md.getDocument(sourcePosition, destPosition,
GMapV2Direction.MODE_DRIVING);
ArrayList<LatLng> directionPoint = md.getDirection(doc);
PolylineOptions rectLine = new PolylineOptions().width(3).color(
Color.RED);
for (int i = 0; i < directionPoint.size(); i++)
{
rectLine.add(directionPoint.get(i));
}
Polyline polylin = mMap.addPolyline(rectLine);
}*/
@Override
public void onMapReady(GoogleMap map)
{
// check if map is created successfully or not
if (map == null)
{
Toast.makeText(getApplicationContext(),
"Sorry! unable to load maps", Toast.LENGTH_SHORT)
.show();
}
else
{
myLocation = new MyLocation(MapyPane.this, map);
if (myLocation.isLocationAvailable() && myLocation.getUserLocation() != null)
{
current_location_lat = myLocation.getUserLocation().latitude;
current_location_lng = myLocation.getUserLocation().longitude;
latStr = current_location_lat + "";
longStr = current_location_lng + "";
//url = url_part1 + latStr + "," + longStr + url_part2;
Log.d("LATITUDE", String.valueOf(current_location_lat));
Log.d("LONGITUDE", String.valueOf(current_location_lng));
// Showing Current Location
map.setMyLocationEnabled(true);
// Move the camera instantly to hamburg with a zoom of 15.
map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(current_location_lat, current_location_lng), 15));
// Zoom in, animating the camera.
map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
// Moving Camera to a Location with animation
/*CameraPosition cameraPosition = new CameraPosition.Builder().target(
new LatLng(current_location_lat, current_location_lng)).zoom(12).build();
//CameraPosition cameraPosition = new CameraPosition.Builder().target(
//new LatLng( -33.8650, 151.2094)).zoom(12).build();
map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));*/
MarkerOptions markerOptions = new MarkerOptions().title("YourLocation").position(new LatLng(current_location_lat, current_location_lng)).icon(BitmapDescriptorFactory
.fromResource(R.drawable.gas_station));//gas_station
myMarker = map.addMarker(markerOptions);
new PlaceTask(context, positionToFind, latStr, longStr, new onTaskDoneListener() {
@Override
public void onTaskDone(JSONObject jsonObject)
{
}
});
//showSearchDialog(map);
}
else
{
Toast.makeText(MapyPane.this, "Please Enable Location Services and GPS From your Device",
Toast.LENGTH_LONG).show();
}
}
/* LatLng sydney = new LatLng(-33.867, 151.206);
map.setMyLocationEnabled(true);
map.moveCamera(CameraUpdateFactory.newLatLngZoom(sydney, 13));
map.addMarker(new MarkerOptions()
.title("Sydney")
.snippet("The most populous city in Australia.")
.position(sydney));*/
/*map.moveCamera(CameraUpdateFactory.newLatLngZoom(
new LatLng(41.889, -87.622), 16));
// You can customize the marker image using images bundled with
// your app, or dynamically generated bitmaps.
map.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher))
.anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
.position(new LatLng(41.889, -87.622)));*/
}
private void drawMarkersOnMap(JSONObject jsonObject,final GoogleMap googleMap,int posi)
{
if(jsonObject!=null)
{
googleMap.clear();
try
{
JSONObject obj = jsonObject;//new JSONObject(jsonObject);
String status = obj.getString("status");
if(status.equals("OK"))
{
JSONArray arr = obj.getJSONArray("results");
for(int i = 0; i < arr.length(); i++)
{
double lat = arr.getJSONObject(i).getJSONObject("geometry").getJSONObject("location").getDouble("lat");
double lng = arr.getJSONObject(i).getJSONObject("geometry").getJSONObject("location").getDouble("lng");
String food_name = arr.getJSONObject(i).getString("name");
String vicinity = arr.getJSONObject(i).getString("vicinity");
MarkerOptions marker = new MarkerOptions().position(new LatLng(lat, lng)).icon(BitmapDescriptorFactory
.fromResource( imageId[posi]));// R.drawable.ic_launcher));//gas_station
marker.title(food_name);
marker.snippet(vicinity);
final Marker testMarker = googleMap.addMarker(marker);
googleMap.setOnMarkerClickListener(new OnMarkerClickListener()
{
@Override
public boolean onMarkerClick(Marker markker)
{
if(markker.equals(testMarker))
{
//drawPathBetween(myMarker.getPosition(), markker.getPosition(), googleMap);
}
else
{
}
return false;
}
});
}
}
}
catch (JSONException e)
{
e.printStackTrace();
}
}
}
private void showSearchDialog(final GoogleMap map)
{
searchDialog = new Dialog(MapyPane.this);
searchDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
searchDialog.setContentView(R.layout.menu_item_custom_dialog);
searchDialog.setCanceledOnTouchOutside(false);
ListView list;
final String[] web = {
"airport",
"atm",
"bank",
"bus_station",
"gas_station", //department_store ya home_goods_store
"hospital", //health
"mosque",//7
"park",
"restaurant",//instead of hotels
"university",
"Food"
} ;
Integer[] imageId = {
R.drawable.school_3,
R.drawable.atm_3,
R.drawable.school_3,
R.drawable.police_station_3,
R.drawable.cng_station_3,//5
R.drawable.hospital_3,
R.drawable.school_3,
R.drawable.hospital_3,//8
R.drawable.hotel_3,
R.drawable.cng_station_3,
R.drawable.hotel_3
};
CustomList adapter = new
CustomList(MapyPane.this, web, imageId);
list = (ListView) searchDialog.findViewById(R.id.list_location);
list.setAdapter(adapter);
///list.setSelector(R.drawable.list_item_selector);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
final int position, long id) {
//Toast.makeText(MapyPane.this, "You Clicked at " +web[+ position], Toast.LENGTH_SHORT).show();
ConnectivityManager connManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (mWifi.isConnected())
{
if(latStr.equals(""))
{
Toast.makeText(MapyPane.this, " please enable your gps location ", Toast.LENGTH_SHORT).show();
}
else
{
new PlaceTask(MapyPane.this, position, latStr, longStr, new onTaskDoneListener()
{
@Override
public void onTaskDone(JSONObject jsonObject)
{
drawMarkersOnMap(jsonObject, map,position);
}
}).execute();
searchDialog.dismiss();
}
}
else
{
Toast.makeText(MapyPane.this, "Internet is not available", Toast.LENGTH_SHORT).show();
}
}
});
searchDialog.show();
}
}
【讨论】：
那么您的问题的解决方案是 Android Places API....它允许您根据您的选择显示附近的地方...这将帮助您开始...https://developers.google.com/places/android-api/start
【讨论】：