我有一个在MapFragment上创建实例的位置类，并且根据创建地图的活动，将删除不同的标记。我还希望地图显示手机当前位置的标记。
我假设我可以做这样的事情，但我无法弄清楚如何获取和更新电话当前坐标并将其分配给myLocation。
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_location);
MapFragment googleMap = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
googleMap.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap nMap){
if(MainMenu.bkSource == true) {
LatLng bkLatLng = new LatLng(54.5816008, -5.9651271);
LatLng myLocation = new LatLng(???);
nMap.addMarker(new MarkerOptions().position(bkLatLng).title("Burger King, Boucher Road"));
nMap.addMarker(new MarkerOptions().position(myLocation).title("You Are Here");
nMap.moveCamera(CameraUpdateFactory.newLatLngZoom(bkLatLng, 15));
nMap.animateCamera(CameraUpdateFactory.zoomTo(18.0f));
}
if(MainMenu.kfcSource == true){
LatLng bkLatLng = new LatLng(54.5771914, -5.9620562);
nMap.addMarker(new MarkerOptions().position(bkLatLng).title("KFC, Boucher Road"));
nMap.moveCamera(CameraUpdateFactory.newLatLngZoom(bkLatLng, 15));
nMap.animateCamera(CameraUpdateFactory.zoomTo(18.0f));
}
if(MainMenu.mcdSource == true){
LatLng bkLatLng = new LatLng(54.5879486, -5.9580009);
nMap.addMarker(new MarkerOptions().position(bkLatLng).title("McDonald's, Boucher Road"));
nMap.moveCamera(CameraUpdateFactory.newLatLngZoom(bkLatLng, 15));
nMap.animateCamera(CameraUpdateFactory.zoomTo(18.0f));
}
}
答案 0 :(得分：1)
在你的片段中实现这个。
implements GoogleMap.InfoWindowAdapter, OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener
然后创建一个全局变量。
private GoogleMap mMap;
private GoogleApiClient mGoogleApiClient;
double curt_lat = 0;
double curt_log = 0;
int Locationtry = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (gps == null)
gps = new GPSTracker(getActivity());
checkPermision();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// 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;
}
Location mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
if (mLastLocation != null) {
Log.e(TAG, "onConnected: " + String.valueOf(mLastLocation.getLatitude()) + ":" + String.valueOf(mLastLocation.getLongitude()));
try {
curt_lat = mLastLocation.getLatitude();
curt_log = mLastLocation.getLongitude();
Log.d(TAG, "OnConnected-" + "" + mLastLocation.getLatitude() + "" + mLastLocation.getLongitude());
selectMapFragment();
} catch (Exception e) {
e.printStackTrace();
}
} else {
getLocationFormGoogleApi(); // OnConnected
((Handler) new Handler()).postDelayed(new Runnable() {
@Override
public void run() {
if (Locationtry < 2) {
Locationtry++;
if (mGoogleApiClient != null) {
mGoogleApiClient.disconnect();
}
mGoogleApiClient = null;
getLocationFormGoogleApi();
// OnConnected
// Consts.displayDialog(MapsActivity.this);
} else {
Locationtry = 0;
// Consts.stopDialog();
// Consts.animationDialog(false, AllRestaurntMapActivity.this, R.layout.activity_all_restaurnt_map);
// isAnimation = false;
}
}
}, 10000);
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.i(TAG, "resultCode: " + resultCode);
if (requestCode == 1) {
if (isGPSEnable()) {
Log.d(TAG, "get GPS Enable");
checkPermision();
getLocationFormGoogleApi();
} else {
isGpsDialogOpen = false;
Log.d(TAG, "GPS NOT Enable");
}
}
super.onActivityResult(requestCode, resultCode, data);
}
public boolean isGPSEnable() {
LocationManager locationManager = (LocationManager) getActivity().getSystemService(LOCATION_SERVICE);
return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
}
public void getLocationFormGoogleApi() {
Log.d(TAG, "getLocationFormGoogleApi");
// Consts.animationDialog(true, AllRestaurntMapActivity.this, R.layout.activity_all_restaurnt_map);
// new Handler().postDelayed(animation, 0);
// Create an instance of GoogleAPIClient.
if (mGoogleApiClient == null) {
Log.d(TAG, "get the LagLog... ");
mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
} else {
Log.d(TAG, "all ready have LagLog... ");
// makeReq(String.valueOf(UserInfo.getLatitude()), String.valueOf(UserInfo.getLongitude()));
Log.d(TAG, "get the LagLog... from permission request accept.. ");
mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
}
@Override
public void onMapReady(GoogleMap googleMap) {
Log.d(TAG, "onMapReady");
if (mMap != null) {
mMap.clear();
}
String url = "";
mMap = googleMap;
mMap.getUiSettings().setMapToolbarEnabled(false);
final LatLngBounds.Builder mapboundbuilder = new LatLngBounds.Builder();
// lat log driver....
Log.d(TAG, "LatLog driver :" + curt_lat + "," + curt_log);
LatLng latLng = new LatLng(curt_lat, curt_log);
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_map_one));
markerOptions.position(latLng);
markerOptions.title("You are Here!");
// markerOptions.snippet("");
mMap.addMarker(markerOptions);
mapboundbuilder.include(latLng);
LatLngBounds tmpbnd = mapboundbuilder.build();
Log.v("connectionurl", url);
LatLng center = tmpbnd.getCenter();
LatLng northEast = Consts.mappointmove(center, 209, 209);
LatLng southWest = Consts.mappointmove(center, 209, 209);
mapboundbuilder.include(southWest);
mapboundbuilder.include(northEast);
LatLngBounds bounds = mapboundbuilder.build();
try {
int width, height;
Display display = getActivity().getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
width = size.x;
height = size.y - 250;
CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, width, height, 100);
googleMap.animateCamera(cu);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* This interface must be implemented by activities that contain this
* fragment to allow an interaction in this fragment to be communicated
* to the activity and potentially other fragments contained in that
* activity.
* <p>
* See the Android Training lesson <a href=
* "http://developer.android.com/training/basics/fragments/communicating.html"
* >Communicating with Other Fragments</a> for more information.
*/
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
@Override
public void onStop() {
if (mGoogleApiClient != null) {
mGoogleApiClient.disconnect();
}
super.onStop();
}
@Override
public void onStart() {
if (mGoogleApiClient != null) {
Log.d(TAG, "Location not Null");
mGoogleApiClient.connect();
}
super.onStart();
}
GPSTracker.java
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.util.Log;
public class GPSTracker extends Service implements LocationListener {
private static final String TAG = GPSTracker.class.getSimpleName();
private final Context mContext;
// flag for GPS status
boolean isGPSEnabled = false;
// flag for network status
boolean isNetworkEnabled = true;
// flag for GPS status
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
// Declaring a Location Manager
protected LocationManager locationManager;
public GPSTracker(Context context) {
this.mContext = context;
getLocation();
}
public Location getLocation() {
try {
locationManager = (LocationManager) mContext
.getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled) {
} else {
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
canGetLocation = true;
Log.d("GPS Enabled", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
// SharedPreferenceUtil.putValue(Preferences.TAG_LATITUDE,""+latitude);
// SharedPreferenceUtil.putValue(Preferences.TAG_LONGITUDE,""+longitude);
// SharedPreferenceUtil.save();
// Preferences.TAG_G_L = "G";
Log.d("gps", latitude + "," + longitude);
}
}
} else {
canGetLocation = false;
Log.d("gps", "GPS Disable");
}
}
}
if (!isNetworkEnabled) {
// no network provider is enabled
} else {
if (isNetworkEnabled) {
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
// Preferences.TAG_G_L = "L";
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
// SharedPreferenceUtil.putValue(Preferences.TAG_LATITUDE,""+latitude);
// SharedPreferenceUtil.putValue(Preferences.TAG_LONGITUDE,""+longitude);
// SharedPreferenceUtil.save();
Log.d("network", latitude + "," + longitude);
}
}
Log.d("network", latitude + "," + longitude);
}
}
/* if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled
} else {
this.canGetLocation = true;
// First get location from Network Provider
if (isNetworkEnabled) {
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
SharedPreferenceUtil.putValue(Preferences.TAG_LATITUDE,""+latitude);
SharedPreferenceUtil.putValue(Preferences.TAG_LONGITUDE,""+longitude);
SharedPreferenceUtil.save();
Log.d("gps",latitude+","+longitude);
}
}
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS Enabled", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
SharedPreferenceUtil.putValue(Preferences.TAG_LATITUDE,""+latitude);
SharedPreferenceUtil.putValue(Preferences.TAG_LONGITUDE,""+longitude);
SharedPreferenceUtil.save();
Log.d("gps",latitude+","+longitude);
}
}
}
}
}*/
} catch (Exception e) {
e.printStackTrace();
}
return location;
}
/**
* Stop using GPS listener
* Calling this function will stop using GPS in your app
*/
public void stopUsingGPS() {
if (locationManager != null) {
locationManager.removeUpdates(GPSTracker.this);
}
}
/**
* Function to get latitude
*/
public double getLatitude() {
if (location != null) {
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
/**
* function to get longitude
*
* @return double
*/
public double getLongitude() {
if (location != null) {
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
/**
* Function to check GPS/wifi enabled
*
* @return boolean
*/
public boolean canGetLocation() {
return this.canGetLocation;
}
/**
* Function to show settings alert dialog
* On pressing Settings button will lauch Settings Options
*/
public void showSettingsAlert() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
alertDialog.setTitle("GPS is settings");
// Setting Dialog Message
alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
// On pressing Settings button
alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
@Override
public void onLocationChanged(Location location) {
Log.e(TAG, "onLocationChanged: " + location.toString());
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}
}
答案 1 :(得分：0)
以下是扩展SupportMapFragment的示例片段，在启动时它将获取用户的当前位置，放置标记并放大：
public class MapFragment extends SupportMapFragment
implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener {
GoogleMap mGoogleMap;
SupportMapFragment mapFrag;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
Marker mCurrLocationMarker;
@Override
public void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
if (mGoogleMap == null) {
getMapAsync(this);
}
}
@Override
public void onPause() {
super.onPause();
//stop location updates when Activity is no longer active
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
@Override
public void onMapReady(GoogleMap googleMap)
{
mGoogleMap=googleMap;
mGoogleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
//Initialize Google Play Services
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
//Location Permission already granted
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
} else {
//Request Location Permission
checkLocationPermission();
}
}
else {
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
}
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
.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(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
}
@Override
public void onConnectionSuspended(int i) {}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {}
@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 = mGoogleMap.addMarker(markerOptions);
//move map camera
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng,11));
}
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
private void checkLocationPermission() {
if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION)) {
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
new AlertDialog.Builder(getActivity())
.setTitle("Location Permission Needed")
.setMessage("This app needs the Location permission, please accept to use location functionality")
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
//Prompt the user once explanation has been shown
ActivityCompat.requestPermissions(getActivity(),
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
})
.create()
.show();
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(getActivity(),
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
}
}
@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, yay! Do the
// location-related task you need to do.
if (ContextCompat.checkSelfPermission(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
if (mGoogleApiClient == null) {
buildGoogleApiClient();
}
mGoogleMap.setMyLocationEnabled(true);
}
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(getActivity(), "permission denied", Toast.LENGTH_LONG).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
}
由于Location权限请求需要通过Activity，因此您需要将Activity中的结果路由到Fragment的onRequestPermissionsResult（）方法：
公共类MainActivity扩展了AppCompatActivity {
MapFragment mapFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mapFragment = new MapFragment();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.add(R.id.mapframe, mapFragment);
transaction.commit();
}
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
if (requestCode == MapFragment.MY_PERMISSIONS_REQUEST_LOCATION){
mapFragment.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
else {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
}
布局只包含MapFragment所在的FrameLayout。
activity_main.xml中：
答案 2 :(得分：0)
使用以下代码获取当前位置：
@Override
public void onMapReady(GoogleMap googleMap) {
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, 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;
}
mMap.setMyLocationEnabled(true);
}
如果您想在当前位置添加标记，请尝试：
1.在您的活动中实施LocationListener。
2.Update LocationRequest：
LocationRequest mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(5000); //5 seconds
mLocationRequest.setFastestInterval(3000); //3 seconds
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
3.在onLocationChanged(Location location)
Geocoder geocoder;
List<Address> addresses;
geocoder = new Geocoder(this, Locale.getDefault());
//place marker at current position
//mGoogleMap.clear();
Marker currLocationMarker;
if (currLocationMarker != null) {
currLocationMarker.remove();
}
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));
currLocationMarker = mMap.addMarker(markerOptions);
}
}