我创建了一个项目数组，每个项目代表一种将在地图上显示的机构。
我需要的是根据点击的按钮过滤项目，这就是问题的来源，
因为我必须再次调用onMapReady()方法，我不知道这是不是一个好习惯。
有关详情，请参阅Android Maps API：
https://developers.google.com/maps/documentation/android-api/
...
public void onConnected(@Nullable Bundle bundle) {
...
mMarkers = mockMarkersArray();
markers = new HashMap<>();
mButtonFilter = null;
}
/**
* Draw Google Maps.
*
* @param googleMap
*/
@Override
public void onMapReady(GoogleMap googleMap) {
if (ActivityCompat.checkSelfPermission(getApplicationContext(), android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getApplicationContext(), android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
googleMap.setMyLocationEnabled(true);
googleMap.setOnMarkerClickListener(this);
googleMap.setOnInfoWindowClickListener(this);
googleMap.setOnInfoWindowCloseListener(this);
if (mMarkers.length() > 0) {
mAccomodButton.setOnClickListener(this);
loopMarkers(googleMap, null);
}
//@TODO - Zooming in on the map by focusing on my currently position.
LatLng currentlyPosition = new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude());
googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(currentlyPosition, 18));
}
/**
* Loop of activities with markers.
*
* @param googleMap
*/
private void loopMarkers(GoogleMap googleMap, String filter) {
mGoogleMap = googleMap;
mGoogleMap.clear();
markers.clear();
for (int i = 0; i < mMarkers.length(); i++) {
try {
JSONObject markerObj = mMarkers.getJSONObject(i);
// if (markerObj.getString("type").equals("accomod")) {
Log.d("DEBUG", "============");
Log.d("DEBUG", "Marker title: " + markerObj.getString("title"));
Log.d("DEBUG", "Marker desc: " + markerObj.getString("desc"));
Log.d("DEBUG", "Marker type: " + markerObj.getString("type"));
Log.d("DEBUG", "============");
String[] latLng = markerObj.getString("latLng").split(",");
double lat = Double.parseDouble(latLng[0]);
double lng = Double.parseDouble(latLng[1]);
LatLng position = new LatLng(lat, lng);
MarkerOptions markerOptions = new MarkerOptions()
.title(markerObj.getString("title"))
.snippet(markerObj.getString("desc"))
.position(position);
Marker marker = mGoogleMap.addMarker(markerOptions);
markers.put(marker, mMarkers);
// }
} catch (JSONException e) {
e.printStackTrace();
}
}
}
/**
* @return
* @TODO - Mock markers in maps
*/
private JSONArray mockMarkersArray() {
JSONObject myMarkerOne = new JSONObject();
try {
myMarkerOne.put("id", 1);
myMarkerOne.put("title", "Shopping Estação");
myMarkerOne.put("desc", "Localizado em uma antiga estação ferroviária, foi inaugurado em 1997 e ...");
myMarkerOne.put("type", "shopping");
myMarkerOne.put("latLng", "-25.4381796,-49.2664607");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerTwo = new JSONObject();
try {
myMarkerTwo.put("id", 2);
myMarkerTwo.put("title", "Câmara Municipal de Curitiba");
myMarkerTwo.put("desc", "");
myMarkerTwo.put("type", "administ");
myMarkerTwo.put("latLng", "-25.4362749,-49.2666494");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerThree = new JSONObject();
try {
myMarkerThree.put("id", 3);
myMarkerThree.put("title", "Hostel Roma");
myMarkerThree.put("desc", "Hotel de 1 estrela. Reserve o seu quarto!");
myMarkerThree.put("type", "accomod");
myMarkerThree.put("latLng", "-25.4369412,-49.2659414");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerFour = new JSONObject();
try {
myMarkerFour.put("id", 4);
myMarkerFour.put("title", "Slaviero Conceptual Rockefeller");
myMarkerFour.put("desc", "Classificado entre os 10% dos melhores hotéis desta área.");
myMarkerFour.put("type", "accomod");
myMarkerFour.put("latLng", "-25.4383619,-49.2653989");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerFive = new JSONObject();
try {
myMarkerFive.put("id", 5);
myMarkerFive.put("title", "Queen's Snooker Burger Bar");
myMarkerFive.put("desc", "");
myMarkerFive.put("type", "bar");
myMarkerFive.put("latLng", "-25.4341294,-49.2665008");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerSix = new JSONObject();
try {
myMarkerSix.put("id", 6);
myMarkerSix.put("title", "Bradesco");
myMarkerSix.put("desc", "");
myMarkerSix.put("type", "bank");
myMarkerSix.put("latLng", "-25.4381796,-49.2664607");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerSeven = new JSONObject();
try {
myMarkerSeven.put("id", 7);
myMarkerSeven.put("title", "Veterinária Prado");
myMarkerSeven.put("desc", "");
myMarkerSeven.put("type", "petshop");
myMarkerSeven.put("latLng", "-25.4367331,-49.2649339");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerEight = new JSONObject();
try {
myMarkerEight.put("id", 8);
myMarkerEight.put("title", "Praça Eufrásio Correia");
myMarkerEight.put("desc", "");
myMarkerEight.put("type", "square");
myMarkerEight.put("latLng", "-25.4367893,-49.2670166");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerNine = new JSONObject();
try {
myMarkerNine.put("id", 9);
myMarkerNine.put("title", "CM Shop");
myMarkerNine.put("desc", "");
myMarkerNine.put("type", "techcel");
myMarkerNine.put("latLng", "-25.4372394,-49.2690715");
} catch (JSONException e) {
e.printStackTrace();
}
}
/**
* Button click event.
*
* @param v
*/
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.accomod_button:
loopMarkers(mGoogleMap, "accomod");
break;
}
}
```
此时我试图删除我不想要的项目，但后来我发现第一次点击时并没有删除所有项目，所以我需要创建一个arraylist并添加我需要显示的项目地图。
/**
* @return
* @TODO - Mock markers in maps
*/
private JSONArray mockMarkersArray() {
JSONObject myMarkerOne = new JSONObject();
try {
myMarkerOne.put("id", 1);
myMarkerOne.put("title", "Shopping Estação");
myMarkerOne.put("desc", "Localizado em uma antiga estação ferroviária, foi inaugurado em 1997 e ...");
myMarkerOne.put("type", "shopping");
myMarkerOne.put("latLng", "-25.4381796,-49.2664607");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerTwo = new JSONObject();
try {
myMarkerTwo.put("id", 2);
myMarkerTwo.put("title", "Câmara Municipal de Curitiba");
myMarkerTwo.put("desc", "");
myMarkerTwo.put("type", "administ");
myMarkerTwo.put("latLng", "-25.4362749,-49.2666494");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerThree = new JSONObject();
try {
myMarkerThree.put("id", 3);
myMarkerThree.put("title", "Hostel Roma");
myMarkerThree.put("desc", "Hotel de 1 estrela. Reserve o seu quarto!");
myMarkerThree.put("type", "accomod");
myMarkerThree.put("latLng", "-25.4369412,-49.2659414");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerFour = new JSONObject();
try {
myMarkerFour.put("id", 4);
myMarkerFour.put("title", "Slaviero Conceptual Rockefeller");
myMarkerFour.put("desc", "Classificado entre os 10% dos melhores hotéis desta área.");
myMarkerFour.put("type", "accomod");
myMarkerFour.put("latLng", "-25.4383619,-49.2653989");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerFive = new JSONObject();
try {
myMarkerFive.put("id", 5);
myMarkerFive.put("title", "Queen's Snooker Burger Bar");
myMarkerFive.put("desc", "");
myMarkerFive.put("type", "bar");
myMarkerFive.put("latLng", "-25.4341294,-49.2665008");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerSix = new JSONObject();
try {
myMarkerSix.put("id", 6);
myMarkerSix.put("title", "Bradesco");
myMarkerSix.put("desc", "");
myMarkerSix.put("type", "bank");
myMarkerSix.put("latLng", "-25.4381796,-49.2664607");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerSeven = new JSONObject();
try {
myMarkerSeven.put("id", 7);
myMarkerSeven.put("title", "Veterinária Prado");
myMarkerSeven.put("desc", "");
myMarkerSeven.put("type", "petshop");
myMarkerSeven.put("latLng", "-25.4367331,-49.2649339");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerEight = new JSONObject();
try {
myMarkerEight.put("id", 8);
myMarkerEight.put("title", "Praça Eufrásio Correia");
myMarkerEight.put("desc", "");
myMarkerEight.put("type", "square");
myMarkerEight.put("latLng", "-25.4367893,-49.2670166");
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject myMarkerNine = new JSONObject();
try {
myMarkerNine.put("id", 9);
myMarkerNine.put("title", "CM Shop");
myMarkerNine.put("desc", "");
myMarkerNine.put("type", "techcel");
myMarkerNine.put("latLng", "-25.4372394,-49.2690715");
} catch (JSONException e) {
e.printStackTrace();
}
JSONArray myMarkers = new JSONArray();
try {
myMarkers.put(0, myMarkerOne);
myMarkers.put(1, myMarkerTwo);
myMarkers.put(2, myMarkerThree);
myMarkers.put(3, myMarkerFour);
myMarkers.put(4, myMarkerFive);
myMarkers.put(5, myMarkerSix);
myMarkers.put(6, myMarkerSeven);
myMarkers.put(7, myMarkerEight);
myMarkers.put(8, myMarkerNine);
} catch (JSONException e) {
e.printStackTrace();
}
return myMarkers;
}
```