谷歌地图：当用户足够近时，如何使标记仅可点击？
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【中文标题】谷歌地图：当用户足够近时，如何使标记仅可点击？【英文标题】：Google Maps: How to make a marker only clickable when the user is close enough? 【发布时间】：2020-03-30 14:10:46 【问题描述】：简而言之，我有一张地图，上面有很多标记，目前，如果您单击其中一个标记，它会显示有关该位置的信息页面。现在我需要这些标记只有在用户离它们足够近时才能被点击。目前标记上的 onClickListener 看起来像这样：
if (marker.getTitle().equals("Hal A"))
Intent halaIntent = new Intent(MapS.this, activity_hala.class);
startActivity(halaIntent);
例如，现在我将使用 (distanceEcolab < 5) 放置另一个 if 语句，然后使用 SphericalUtil.computeDistanceBetween 工具计算距离。
现在我这样做：
final LocationRequest locationRequest = LocationRequest.create();
locationRequest.setInterval(2000);
locationRequest.setFastestInterval(1000);
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationCallback = new LocationCallback()
@Override
public void onLocationResult(LocationResult locationResult)
super.onLocationResult(locationResult);
if (locationResult == null)
return;
mLastKnownLocation = locationResult.getLastLocation();
LatLng lastKnownLatLng = new LatLng(mLastKnownLocation.getLatitude(), mLastKnownLocation.getLongitude());
distanceHala = SphericalUtil.computeDistanceBetween(lastKnownLatLng, HalA);
mFusedLocationProviderClient.removeLocationUpdates(locationCallback);
;
现在我尝试了这个，我没有收到任何错误，应用程序也没有崩溃，但即使我离标记不够近，我仍然可以单击标记。 这是我第一次使用 android Studio 和 Java，所以像我 10 岁一样解释它。 顺便说一句，我什至不确定问题出在我刚刚展示的代码中。
完整代码：
package com.example.discoverkoelak;
import ...
import static com.google.maps.android.SphericalUtil.computeDistanceBetween;
public class MapS extends AppCompatActivity implements OnMapReadyCallback
private double distanceHala;
private GoogleMap mMap;
private FusedLocationProviderClient mFusedLocationProviderClient;
private List<AutocompletePrediction> predictionList;
private Location mLastKnownLocation;
private LocationCallback locationCallback;
private final float DEFAULT_ZOOM = 18;
private View mapView;
private Marker kaka;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_map);
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.MapS);
mapFragment.getMapAsync(this);
mapView = mapFragment.getView();
mFusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(MapS.this);
Places.initialize(MapS.this, ("MY_API_KEY"));
ImageView legendeBtn = (ImageView) findViewById(R.id.merkar);
legendeBtn.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
Intent maptoLegende = new Intent(getApplicationContext(), activity_legende.class);
startActivity(maptoLegende);
);
final AutocompleteSessionToken token = AutocompleteSessionToken.newInstance();
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data)
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 51)
if (resultCode == RESULT_OK)
getDeviceLocation();
@SuppressLint("MissingPermission")
private void getDeviceLocation()
mFusedLocationProviderClient.getLastLocation()
.addOnCompleteListener(new OnCompleteListener<Location>()
@Override
public void onComplete(@NonNull Task<Location> task)
if (task.isSuccessful())
mLastKnownLocation = task.getResult();
if (mLastKnownLocation != null)
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(mLastKnownLocation.getLatitude(), mLastKnownLocation.getLongitude()), DEFAULT_ZOOM));
else
final LocationRequest locationRequest = LocationRequest.create();
locationRequest.setInterval(2000);
locationRequest.setFastestInterval(1000);
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationCallback = new LocationCallback()
@Override
public void onLocationResult(LocationResult locationResult)
super.onLocationResult(locationResult);
if (locationResult == null)
return;
mLastKnownLocation = locationResult.getLastLocation();
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(mLastKnownLocation.getLatitude(), mLastKnownLocation.getLongitude()), DEFAULT_ZOOM));
mFusedLocationProviderClient.removeLocationUpdates(locationCallback);
;
mFusedLocationProviderClient.requestLocationUpdates(locationRequest, locationCallback, null);
else
Toast.makeText(MapS.this, "Laatste gekende locatie kan niet worden ontvangen", Toast.LENGTH_SHORT).show();
);
@Override
public void onMapReady(GoogleMap googleMap)
int height = 120;
int width = 90;
BitmapDrawable bitmapdraw=(BitmapDrawable)getResources().getDrawable(R.drawable.marker_dark);
BitmapDrawable bitmapdraw2=(BitmapDrawable)getResources().getDrawable(R.drawable.marker_aula_0);
BitmapDrawable bitmapdraw3=(BitmapDrawable)getResources().getDrawable(R.drawable.marker_research_0);
BitmapDrawable bitmapdraw4=(BitmapDrawable)getResources().getDrawable(R.drawable.marker_residentie);
BitmapDrawable bitmapdraw5=(BitmapDrawable)getResources().getDrawable(R.drawable.marker_ontspanning);
BitmapDrawable bitmapdraw6=(BitmapDrawable)getResources().getDrawable(R.drawable.marker_mobiliteit_1);
BitmapDrawable bitmapdraw7=(BitmapDrawable)getResources().getDrawable(R.drawable.marker_research_1);
BitmapDrawable bitmapdraw8=(BitmapDrawable)getResources().getDrawable(R.drawable.marker_mobiliteit_0);
BitmapDrawable bitmapdraw9=(BitmapDrawable)getResources().getDrawable(R.drawable.marker_administratie);
Bitmap b=bitmapdraw.getBitmap();
Bitmap b2=bitmapdraw2.getBitmap();
Bitmap b3=bitmapdraw3.getBitmap();
Bitmap b4=bitmapdraw4.getBitmap();
Bitmap b5=bitmapdraw5.getBitmap();
Bitmap b6=bitmapdraw6.getBitmap();
Bitmap b7=bitmapdraw7.getBitmap();
Bitmap b8=bitmapdraw8.getBitmap();
Bitmap b9=bitmapdraw9.getBitmap();
Bitmap smallMarker = Bitmap.createScaledBitmap(b, width, height, false);
Bitmap aulas = Bitmap.createScaledBitmap(b2, width, height, false);
Bitmap research = Bitmap.createScaledBitmap(b3, width, height, false);
Bitmap residenties = Bitmap.createScaledBitmap(b4, width, height, false);
Bitmap ontspanning = Bitmap.createScaledBitmap(b5, width, height, false);
Bitmap mobiliteitU = Bitmap.createScaledBitmap(b6, width, height, false);
Bitmap researchU = Bitmap.createScaledBitmap(b7, width, height, false);
Bitmap mobiliteit = Bitmap.createScaledBitmap(b8, width, height, false);
Bitmap administratie = Bitmap.createScaledBitmap(b9, width, height, false);
mMap = googleMap;
mMap.setMyLocationEnabled(true);
mMap.getUiSettings().setMyLocationButtonEnabled(true);
mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
HERE I STATE THE COORDINATES OF ALL THE MARKERS LIKE THIS:
final LatLng HalA = new LatLng(... , ...);
//Code die markers zet en ze klikbaar maakt.
//Hal A
googleMap.addMarker(new MarkerOptions().position(HalA)
.title("Hal A")
.icon(BitmapDescriptorFactory.fromBitmap(ontspanning)));
mMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener()
@Override
public boolean onMarkerClick(final Marker marker)
if (marker.getTitle().equals("Hal A"))
Intent halaIntent = new Intent(MapS.this, hala.class);
startActivity(halaIntent);
return false;
return false;
);
googleMap.addMarker(new MarkerOptions().position(stuvo)
.title("Stuvo")
.icon(BitmapDescriptorFactory.fromBitmap(administratie)));
googleMap.addMarker(new MarkerOptions().position(bib)
.title("Bib")
.icon(BitmapDescriptorFactory.fromBitmap(administratie)));
googleMap.addMarker(new MarkerOptions().position(acco)
.title("Acco boekenhandel")
.icon(BitmapDescriptorFactory.fromBitmap(administratie)));
googleMap.addMarker(new MarkerOptions().position(rectoraat)
.title("Hal Rectoraat")
.icon(BitmapDescriptorFactory.fromBitmap(administratie)));
googleMap.addMarker(new MarkerOptions().position(spina)
.title("Spina")
.icon(BitmapDescriptorFactory.fromBitmap(mobiliteit)));
googleMap.addMarker(new MarkerOptions().position(stilleRuimte)
.title("Stille ruimte")
.icon(BitmapDescriptorFactory.fromBitmap(ontspanning)));
googleMap.addMarker(new MarkerOptions().position(A301)
.title("Aula Stijn Streuvels (A301)")
.icon(BitmapDescriptorFactory.fromBitmap(aulas)));
googleMap.addMarker(new MarkerOptions().position(weetkelder)
.title("Weetkelder")
.icon(BitmapDescriptorFactory.fromBitmap(researchU)));
googleMap.addMarker(new MarkerOptions().position(fietsena)
.title("FietsenA")
.icon(BitmapDescriptorFactory.fromBitmap(mobiliteitU)));
googleMap.addMarker(new MarkerOptions().position(labos)
.title("Labo's (gang 3)")
.icon(BitmapDescriptorFactory.fromBitmap(research)));
//gebouw B
googleMap.addMarker(new MarkerOptions().position(B422)
.title("B422")
.icon(BitmapDescriptorFactory.fromBitmap(aulas)));
googleMap.addMarker(new MarkerOptions().position(puc)
.title("puc")
.icon(BitmapDescriptorFactory.fromBitmap(research)));
//gebouw c
googleMap.addMarker(new MarkerOptions().position(C611)
.title("C611")
.icon(BitmapDescriptorFactory.fromBitmap(aulas)));
googleMap.addMarker(new MarkerOptions().position(gang7)
.title("Gang 7")
.icon(BitmapDescriptorFactory.fromBitmap(research)));
//gebouw E
googleMap.addMarker(new MarkerOptions().position(E1001)
.title("Aula Andreas Vesalius (E1001)")
.icon(BitmapDescriptorFactory.fromBitmap(aulas)));
googleMap.addMarker(new MarkerOptions().position(vaardigheidscentrum)
.title("Vaardigheidscentrum")
.icon(BitmapDescriptorFactory.fromBitmap(research)));
googleMap.addMarker(new MarkerOptions().position(IRF)
.title("IRF")
.icon(BitmapDescriptorFactory.fromBitmap(research)));
googleMap.addMarker(new MarkerOptions().position(fietsene)
.title("fietsene")
.icon(BitmapDescriptorFactory.fromBitmap(mobiliteitU)));
//residenties
googleMap.addMarker(new MarkerOptions().position(spoelberg)
.title("Spoelberg")
.icon(BitmapDescriptorFactory.fromBitmap(residenties)));
googleMap.addMarker(new MarkerOptions().position(studentendorp)
.title("Studentendorp")
.icon(BitmapDescriptorFactory.fromBitmap(residenties)));
googleMap.addMarker(new MarkerOptions().position(corona)
.title("Corona")
.icon(BitmapDescriptorFactory.fromBitmap(residenties)));
//andere
googleMap.addMarker(new MarkerOptions().position(IICK)
.title("IICK")
.icon(BitmapDescriptorFactory.fromBitmap(research)));
googleMap.addMarker(new MarkerOptions().position(almaZweetkelder)
.title("Alma & Cantor en Zweetkelder")
.icon(BitmapDescriptorFactory.fromBitmap(ontspanning)));
googleMap.addMarker(new MarkerOptions().position(ecolab)
.title("Ecolab")
.icon(BitmapDescriptorFactory.fromBitmap(ontspanning)));
//Afstand berekenen tussen laatst gekende locatie en PoI's
// LatLng lastKnownLatLng = new LatLng(mLastKnownLocation.getLatitude(), mLastKnownLocation.getLongitude());
// final double distanceEcolab = SphericalUtil.computeDistanceBetween(lastKnownLatLng, ecolab);
// final double distanceHala = SphericalUtil.computeDistanceBetween(lastKnownLatLng, HalA);
final LocationRequest locationRequest = LocationRequest.create();
locationRequest.setInterval(2000);
locationRequest.setFastestInterval(1000);
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationCallback = new LocationCallback()
@Override
public void onLocationResult(LocationResult locationResult)
super.onLocationResult(locationResult);
if (locationResult == null)
return;
mLastKnownLocation = locationResult.getLastLocation();
LatLng lastKnownLatLng = new LatLng(mLastKnownLocation.getLatitude(), mLastKnownLocation.getLongitude());
distanceHala = SphericalUtil.computeDistanceBetween(lastKnownLatLng, HalA);
mFusedLocationProviderClient.removeLocationUpdates(locationCallback);
;
mMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener()
@Override
public boolean onMarkerClick(final Marker marker)
if (marker.getTitle().equals("Ecolab"))
Intent ecolabIntent = new Intent(MapS.this, activity_ecolab.class);
startActivity(ecolabIntent);
else if (marker.getTitle().equals("Alma & Cantor en Zweetkelder"))
Intent AlmaIntent = new Intent(MapS.this, activity_acz.class);
startActivity(AlmaIntent);
else if (marker.getTitle().equals("IICK"))
Intent IICKIntent = new Intent(MapS.this, activity_iick.class);
startActivity(IICKIntent);
else if (marker.getTitle().equals("Corona"))
Intent coronaIntent = new Intent(MapS.this, activity_corona.class);
startActivity(coronaIntent);
else if (marker.getTitle().equals("Studentendorp"))
Intent studentendorpIntent = new Intent(MapS.this, activity_studentendorp.class);
startActivity(studentendorpIntent);
else if (marker.getTitle().equals("Spoelberg"))
Intent spoelbergIntent = new Intent(MapS.this, activity_spoelberg.class);
startActivity(spoelbergIntent);
else if (marker.getTitle().equals("fietsene"))
Intent fietseneIntent = new Intent(MapS.this, activity_fietsene.class);
startActivity(fietseneIntent);
else if (marker.getTitle().equals("IRF"))
Intent IRFIntent = new Intent(MapS.this, activity_irf.class);
startActivity(IRFIntent);
else if (marker.getTitle().equals("Vaardigheidscentrum"))
Intent vaardigheidscentrumIntent = new Intent(MapS.this, activity_vaardigheid.class);
startActivity(vaardigheidscentrumIntent);
else if (marker.getTitle().equals("Aula Andreas Vesalius (E1001)"))
Intent E1001Intent = new Intent(MapS.this, activity_e1001.class);
startActivity(E1001Intent);
else if (marker.getTitle().equals("Gang 7"))
Intent gang7Intent = new Intent(MapS.this, activity_kantoren.class);
startActivity(gang7Intent);
else if (marker.getTitle().equals("C611"))
Intent C611Intent = new Intent(MapS.this, activity_c611.class);
startActivity(C611Intent);
else if (marker.getTitle().equals("puc"))
Intent pucIntent = new Intent(MapS.this, activity_puc.class);
startActivity(pucIntent);
else if (marker.getTitle().equals("B422"))
Intent B422Intent = new Intent(MapS.this, activity_b422.class);
startActivity(B422Intent);
else if (marker.getTitle().equals("Labo's (gang 3)"))
Intent labosIntent = new Intent(MapS.this, activity_labo.class);
startActivity(labosIntent);
else if (marker.getTitle().equals("FietsenA"))
Intent fietsenaIntent = new Intent(MapS.this, activity_fietsena.class);
startActivity(fietsenaIntent);
else if (marker.getTitle().equals("Weetkelder"))
Intent weetkelderIntent = new Intent(MapS.this, activity_weetkelder.class);
startActivity(weetkelderIntent);
else if (marker.getTitle().equals("Aula Stijn Streuvels (A301)"))
Intent A301Intent = new Intent(MapS.this, activity_A301.class);
startActivity(A301Intent);
else if (marker.getTitle().equals("Stille ruimte"))
Intent stilIntent = new Intent(MapS.this, activity_stil.class);
startActivity(stilIntent);
else if (marker.getTitle().equals("Spina"))
Intent spinaIntent = new Intent(MapS.this, activity_spina.class);
startActivity(spinaIntent);
else if (marker.getTitle().equals("Hal Rectoraat"))
Intent rectoraatIntent = new Intent(MapS.this, activity_rectoraat.class);
startActivity(rectoraatIntent);
else if (marker.getTitle().equals("Acco boekenhandel"))
Intent accoIntent = new Intent(MapS.this, activity_acco.class);
startActivity(accoIntent);
else if (marker.getTitle().equals("Bib"))
Intent bibIntent = new Intent(MapS.this, activity_onthaalbib.class);
startActivity(bibIntent);
else if (marker.getTitle().equals("Stuvo"))
Intent stuvoIntent = new Intent(MapS.this, activity_secstuvo.class);
startActivity(stuvoIntent);
else if (marker.getTitle().equals("Hal A"))
if (distanceHala < 5)
Intent halaIntent = new Intent(MapS.this, hala.class);
startActivity(halaIntent);
return true;
);
if(mapView != null && mapView.findViewById(Integer.parseInt("1")) != null)
View locationButton = ((View) mapView.findViewById(Integer.parseInt("1")).getParent()).findViewById(Integer.parseInt("2"));
RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) locationButton.getLayoutParams();
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_TOP, 0);
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
layoutParams.setMargins(0,0,40,180);
// kijken of gps signaal aanstaat
// LocationRequest locationRequest = LocationRequest.create();
// locationRequest.setInterval(10000);
// locationRequest.setFastestInterval(5000);
// locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder().addLocationRequest(locationRequest);
SettingsClient settingsClient = LocationServices.getSettingsClient(MapS.this);
Task<LocationSettingsResponse> task = settingsClient.checkLocationSettings(builder.build());
task.addOnSuccessListener(MapS.this, new OnSuccessListener<LocationSettingsResponse>()
@Override
public void onSuccess(LocationSettingsResponse locationSettingsResponse)
getDeviceLocation();
);
task.addOnFailureListener(MapS.this, new OnFailureListener()
@Override
public void onFailure(@NonNull Exception e)
if(e instanceof ResolvableApiException)
ResolvableApiException resolvable = (ResolvableApiException) e;
try
resolvable.startResolutionForResult(MapS.this, 51);
catch (IntentSender.SendIntentException e1)
e1.printStackTrace();
);
【问题讨论】：
【参考方案1】：只需在onMarkerClick() 中添加距离检查，就像这样：
...
@Override
public boolean onMarkerClick(final Marker marker)
double distancetoMarker = SphericalUtil.computeDistanceBetween(lastKnownLatLng, marker.getPosition());
if (distancetoMarker > MAX_DISTANCE_TO_CLICKED_MARKER)
return;
if (marker.getTitle().equals("Ecolab"))
Intent ecolabIntent = new Intent(MapS.this, activity_ecolab.class);
startActivity(ecolabIntent);
...
【讨论】：
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