【问题标题】:how to show markers list in google map如何在谷歌地图中显示标记列表
【发布时间】:2017-05-24 12:17:32
【问题描述】:

我试过这段代码,但它显示了用户的当前位置


public class DeveloperAdress extends Fragment implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks,GoogleApiClient.OnConnectionFailedListener,LocationListener {

private static final String var= Config.PORT_CONX;
private static final String TAG = DeveloperAdress.class.getSimpleName();
private static final String url =var+ "listeAddress";
private ProgressDialog pDialog;
private GoogleMap mMap;
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
LocationRequest mLocationRequest;
Marker mCurrLocationMarker;
List<Address> adresss;
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;

public DeveloperAdress() {

}


public static DeveloperAdress newInstance() {
    DeveloperAdress fragment = new DeveloperAdress();
    Bundle args = new Bundle();

    fragment.setArguments(args);
    return fragment;
}

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




}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view= inflater.inflate(R.layout.developer_adress, container, false);
    SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager()
            .findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);


    for(Address address:addresss) {
      //  mMap.addMarker(new MarkerOptions().position(new LatLng(address.getLatitude(), address.getLongitude())));

        markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
        Marker markert = mMap.addMarker(markerOptions);
    }
    return  view;
}

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

    mMap.getUiSettings().setZoomControlsEnabled(true);




    if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (ContextCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
            buildGoogleApiClient();
            mMap.setMyLocationEnabled(true);
        }
    }
    else {
        buildGoogleApiClient();
        mMap.setMyLocationEnabled(true);
    }
}

protected synchronized void buildGoogleApiClient() {
    mGoogleApiClient = new GoogleApiClient.Builder(getContext()).addConnectionCallbacks(this).addOnConnectionFailedListener(this).addApi(LocationServices.API).build();
    mGoogleApiClient.connect();
}
@Override
public void onConnected(Bundle bundle) {
    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(1000);
    mLocationRequest.setFastestInterval(1000);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
    if (ContextCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
    }
}

@Override
public void onConnectionSuspended(int i) {

}

@Override
public void onLocationChanged(Location location) {
    mLastLocation = location;
    if (mCurrLocationMarker != null) {
        mCurrLocationMarker.remove();
    }

    //Place current location marker
    LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
    MarkerOptions markerOptions = new MarkerOptions();
    markerOptions.position(latLng);
    markerOptions.title("Current Position");
    markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
    mCurrLocationMarker = mMap.addMarker(markerOptions);

    mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
    mMap.animateCamera(CameraUpdateFactory.zoomTo(11));

    //stop location updates
    if (mGoogleApiClient != null) {
        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
    }


}


@Override
public void onConnectionFailed(ConnectionResult connectionResult) {

}



@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case MY_PERMISSIONS_REQUEST_LOCATION: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                // Permission was granted.
                if (ContextCompat.checkSelfPermission(getContext(),
                        Manifest.permission.ACCESS_FINE_LOCATION)
                        == PackageManager.PERMISSION_GRANTED) {

                    if (mGoogleApiClient == null) {
                        buildGoogleApiClient();
                    }
                    mMap.setMyLocationEnabled(true);
                }

            } else {

                // Permission denied, Disable the functionality that depends on this permission.
                Toast.makeText(getContext(), "permission denied", Toast.LENGTH_LONG).show();
            }
            return;
        }


    }
}
public boolean checkLocationPermission(){
    if (ContextCompat.checkSelfPermission(getContext(),
            Manifest.permission.ACCESS_FINE_LOCATION)
            != PackageManager.PERMISSION_GRANTED) {

        // Asking user if explanation is needed
        if (ActivityCompat.shouldShowRequestPermissionRationale(getActivity(),
                Manifest.permission.ACCESS_FINE_LOCATION)) {


            ActivityCompat.requestPermissions(getActivity(),
                    new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                    MY_PERMISSIONS_REQUEST_LOCATION);


        } else {
            ActivityCompat.requestPermissions(getActivity(),
                    new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                    MY_PERMISSIONS_REQUEST_LOCATION);
        }
        return false;
    } else {
        return true;
    }
}



public List<Address> getAllAddresss(){

    final List<Address> addresss = new ArrayList<Address>();

    JsonArrayRequest prodReq = new JsonArrayRequest(url,
            new Response.Listener<JSONArray>() {
                @Override
                public void onResponse(JSONArray response) {
                    Log.d(TAG, response.toString());
                    hidePDialog();

                    // Parsing json
                    for (int i = 0; i < response.length(); i++) {
                        try {

                            JSONObject obj = response.getJSONObject(i);
                            Address address = new Address();
                            address.setId(obj.getInt("id"));
                                         address.setLongitude(obj.getDouble("longitude"));
                            address.setLatitude(obj.getDouble("latitude"));

                            addresss.add(address);

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

                    }



                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            VolleyLog.d(TAG, "connexion impossible !!");
            hidePDialog();

        }
    });

    AppController.getInstance().addToRequestQueue(prodReq);

    return addresss;

}
private void hidePDialog() {
    if (pDialog != null) {
        pDialog.dismiss();
        pDialog = null;
    }

}




@Override
public void onResume() {
    super.onResume();

}
}

【问题讨论】:

  • 你到底想要什么?请详细说明问题。
  • 谢谢各位,我找到了解决办法:只需检索上一个片段中的地址列表,然后在这个片段的构造函数中传递该列表

标签: android google-maps google-maps-markers


【解决方案1】:

试试这个:

googleMap.addMarker(new MarkerOptions()
            .position(new LatLng(28.7750, 77.4183))
            .title("Marker in India")
            .icon(BitmapDescriptorFactory
            .defaultMarker(BitmapDescriptorFactory.HUE_GREEN))
            .snippet("kochi").draggable(true));

您的onMapReady(GoogleMap googleMap) 未被调用。 您需要在地图片段上调用getMapAsync 来设置OnMapReadyCallback

来自the documentation

public void getMapAsync(OnMapReadyCallback 回调)

设置一个回调对象,当 GoogleMap 实例已准备好使用。

onCreate 函数的末尾添加此代码:

MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);

使用 Marker

放置在地图表面上特定点的图标。标记图标是针对设备屏幕而不是地图表面绘制的;即,它不一定会因地图旋转、倾斜或缩放而改变方向。

标记具有以下属性:

锚点

图像上将放置在标记的 LatLng 位置的点。这默认为图像左侧和图像底部的 50%。

位置

标记在地图上的位置的 LatLng 值。如果要移动标记,可以随时更改此值。

标题

当用户点击标记时显示在信息窗口中的文本字符串。您可以随时更改此值。

片段

显示在标题下方的附加文本。您可以随时更改此值。

图标

为标记显示的位图。如果未设置图标,则会显示默认图标。您可以使用 defaultMarker(float) 指定默认图标的替代颜色。创建标记后,您将无法更改图标。

拖动状态

如果要允许用户拖动标记,请将此属性设置为 true。您可以随时更改此值。默认为真。

可见性

默认情况下,标记是可见的。要使标记不可见,请将此属性设置为 false。您可以随时更改此值。

【讨论】:

    【解决方案2】:

    https://github.com/anandvardhan1991/GoogleMaps-Web-API-Demo

    查看此演示以了解 Google Web Places API。

    【讨论】:

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