在谷歌地图android中使用gps移动标记答案

【问题标题】：Move marker with gps in google map android在谷歌地图android中使用gps移动标记
【发布时间】：2017-07-23 10:12:11
【问题描述】：

我想移动GOOGLE MAP 中的标记，同时gps 位置发生变化，就像在UBER 应用程序中一样。我找到了一些解决方案，但无法解决我的问题。解决方案是1 和2

下面是我的onLocationChange()方法

public void onLocationChanged(Location location) {

    double lattitude = location.getLatitude();
    double longitude = location.getLongitude();

    mLastLocation = location;
    if (mCurrLocationMarker != null) {
        mCurrLocationMarker.remove();
    }
    //Place current location marker
    LatLng latLng = new LatLng(lattitude, longitude);
    MarkerOptions markerOptions = new MarkerOptions();
    markerOptions.position(latLng);
    markerOptions.title("I am here");
    markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));

    mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);

    tv_loc.append("Lattitude: " + lattitude + "  Longitude: " + longitude);

    //move map camera
    mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
    mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(15));

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

}

更新 1（重新编辑）

为了更好地理解，我添加了更多代码，但首先我想告诉我我在我的应用程序中使用标签。第一个tab 是我的地图。所以我正在使用片段。

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

GoogleMap mGoogleMap;
SupportMapFragment mapFrag;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
Marker mCurrLocationMarker=null;
TextView tv_loc;
private static View view;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    if(view != null)
    {
        ViewGroup viewGroupParent = (ViewGroup)view.getParent();
        if(viewGroupParent !=null)
        {
            viewGroupParent.removeView(viewGroupParent);
        }
    }
    try{
        view = inflater.inflate(R.layout.my_location,container, false);
    }catch (Exception e)
    {
         /* map is already there, just return view as it is */
        return  view;
    }

    // inflat and return the layout
    //View rootView = inflater.inflate(R.layout.my_location, container, false);

    tv_loc = (TextView)view.findViewById(R.id.textView);
    mapFrag = (SupportMapFragment)getChildFragmentManager().findFragmentById(R.id.map);
    mapFrag.getMapAsync(this);

    return view;

}

@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_NORMAL);

    //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 onLocationChanged(Location location) {

    double lattitude = location.getLatitude();
    double longitude = location.getLongitude();

    //Place current location marker
    LatLng latLng = new LatLng(lattitude, longitude);


    if(mCurrLocationMarker!=null){
        mCurrLocationMarker.setPosition(latLng);
    }else{
        mCurrLocationMarker = mGoogleMap.addMarker(new MarkerOptions()
                .position(latLng)
                .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED))
                .title("I am here"));
    }

    tv_loc.append("Lattitude: " + lattitude + "  Longitude: " + longitude);
    mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 15));

    //stop location updates
    if (mGoogleApiClient != null) {
        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
    }
    /*double lattitude = location.getLatitude();
    double longitude = location.getLongitude();

    mLastLocation = location;
    if (mCurrLocationMarker != null) {
        //mGoogleMap.clear();
        mCurrLocationMarker.remove();
    }
    //Place current location marker
    LatLng latLng = new LatLng(lattitude, longitude);
    MarkerOptions markerOptions = new MarkerOptions();
    markerOptions.position(latLng);
    markerOptions.title("I am here");
    markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)).draggable(true);

    mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
    mCurrLocationMarker.setPosition(new LatLng(lattitude,longitude));

    tv_loc.append("Lattitude: " + lattitude + "  Longitude: " + longitude);

    //move map camera
    mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
    mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(15));

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

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) {

    /*super.onRequestPermissionsResult(requestCode, permissions, 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.
                //finish();
                Toast.makeText(getActivity(), "permission denied", Toast.LENGTH_LONG).show();
            }
            return;
        }
        // other 'case' lines to check for other
        // permissions this app might request
    }
}


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

@Override
public void onDestroy() {
    super.onDestroy();
}

@Override
public void onLowMemory() {
    super.onLowMemory();
}


@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

}}

任何帮助将不胜感激

【问题讨论】：

试试mGoogleMap.clear()而不是mCurrLocationMarker.remove()
试过了，没用
快速提问，这个方法在哪里？在活动、服务、应用程序中？如果在一个活动中，它会在你回到活动之前工作，还是根本不工作？我们需要查看更多代码才能真正帮助您。主要是这个方法所在的地方。
使用这个stackoverflow.com/a/42778943/7399521

标签： android google-maps google-maps-api-3 gps

【解决方案1】：

您可以使用下面的代码来更新标记的位置

public void onLocationChanged(Location location) {

    double lattitude = location.getLatitude();
    double longitude = location.getLongitude();

    //Place current location marker
    LatLng latLng = new LatLng(lattitude, longitude);


    if(mCurrLocationMarker!=null){
        mCurrLocationMarker.setPosition(latLng);
    }else{
        mCurrLocationMarker = mGoogleMap.addMarker(new MarkerOptions()
                                .position(latLng)
                                .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED))
                                .title("I am here");
    }

    tv_loc.append("Lattitude: " + lattitude + "  Longitude: " + longitude);
    gMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 15));

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

}

您不需要每次都清除地图。您可以通过将 Marker 添加到 Map 时返回的 Marker 对象来完成。希望对你有帮助。

【讨论】：

尝试了您的代码，但当蓝点移动时，标记仍然位于同一位置。销钉移动时应设置在蓝点上
你能检查一下你的 onLocationChanged 事件被调用了吗？蓝色引脚也是默认地图，他们可能使用不同的逻辑来更改位置。您可以通过硬编码值来检查 setPostion 方法，并检查位置是否改变。我尝试了同样的方法，它正在改变。
stop location updates 这会停止更新位置，所以我认为这就是不移动标记的原因。我的想法可能是我错了
而且每次都会调用onLocationChange方法。你也可以看到我的更新代码
您能否尝试删除停止位置更新下的代码。然后。如果仍然没有，请尽可能上传您的整个活动代码。将清楚地知道为什么它没有被更新

【解决方案2】：

首先在你的Activity中实现LocationListener，然后

如果您只需要显示一个标记（更新标记的位置），请使用：

private Marker currentPositionMarker = null;

 @Override
    public void onLocationChanged(Location location) {

      LatLng  latLng = new LatLng(location.getLatitude(), location.getLongitude());
        CameraPosition cameraPosition = new CameraPosition.Builder()
                .target(latLng).zoom(14).build();

        // mMap.clear(); // Call if You need To Clear Map
        if (currentPositionMarker == null)
            currentPositionMarker = mMap.addMarker(new MarkerOptions()
                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW))
                    .position(latLng)
                    .zIndex(20));
        else 
            currentPositionMarker.setPosition(latLng);


        mMap.animateCamera(CameraUpdateFactory
                .newCameraPosition(cameraPosition));
    }

或者如果您想每次都添加一个新标记：

 @Override
    public void onLocationChanged(Location location) {

        LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
        CameraPosition cameraPosition = new CameraPosition.Builder()
                .target(latLng).zoom(14).build();

        mMap.addMarker(new MarkerOptions()
                .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW))
                .position(latLng)
                .zIndex(20));

        mMap.animateCamera(CameraUpdateFactory
                .newCameraPosition(cameraPosition));
    }

如果位置快速更改，您的应用需要几秒钟来更新其位置标记

【讨论】：

【解决方案3】：

这可以使用 CameraPosition、googleMap.animateCamera 和使用线性插值器的标记移动动画来完成。

你可以看看这个教程here和各自的githubpage。

本教程使用谷歌地图 v2。希望这会有所帮助。

【讨论】：

【解决方案4】：

使用这个：

在您的地图活动中实现LocationListener ,GoogleMap.OnMyLocationChangeListener，然后使用位置更改监听器

       @Override
    public void onMyLocationChange(Location location) { 
        //mMap.clear //if you want refresh map remove comment
        // Getting latitude of the current location
        double latitude = location.getLatitude();

        // Getting longitude of the current location
        double longitude =location.getLongitude();

        // Creating a LatLng object for the current location
        LatLng latLng = new LatLng(latitude, longitude); //your_text_view.settext(latitude+","+longtitudde)

        // Showing the current location in Google Map
      mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
        mMap.addMarker(new MarkerOptions().icon(BitmapDescriptorFactory.fromResource(R.drawable.destination_marker)).position(latLng).title(maping_status));

        // Zoom in the Google Map
      mMap.animateCamera(CameraUpdateFactory.zoomTo(20));
    }

【讨论】：

试过了，标记确实移动了，每次它移动前一个仍然显示，此外，我使用的文本视图显示当前latitude 和longitude。所以文本视图会继续一个一个地重复，而前一个仍然存在。
您使用像 mMap.clear() 这样的标记清除选项。在从我的位置获取 lat long 之前添加上面的代码。
我希望这会帮助你@faisal1208
并在上面的方法中添加像your_text_view.settext(latitude+","+longtitudde)这样的内部方法在从当前位置获取lat long后添加
我根据你的喜好编辑我的帖子stackoverflow.com/a/42778943/7399521 删除我提到的命令 希望你能理解@faisal1208

【解决方案5】：

为了动画，只需调用此方法 (animateMarker) 与以前的位置和新的位置以及标记对象

private Marker mCurrentMarker;
private float ZOOMLEVEL=18.0f;
private LatLng previousLatLon;
private Handler mLocalHandler;
private GoogleMap mGoogleMap;

public void animateMarker(final Marker marker, final LatLng toPosition,final LatLng fromPosition) {


        final long duration = 500;
        final Interpolator interpolator = new LinearInterpolator();

        mLocalHandler.post(new Runnable() {
            @Override
            public void run() {
                long elapsed = SystemClock.uptimeMillis() - mStartTime;
                float t = interpolator.getInterpolation((float) elapsed
                        / duration);
                marker.setPosition(toPosition);
                marker.setAnchor(Constants.MAPANCHOR, Constants.MAPANCHOR);
                mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(toPosition, ZOOMLEVEL));
                if (t < 1.0) {
                    // Post again 16ms later.
                    mLocalHandler.postDelayed(this, 16);
                } else {
                    marker.setVisible(true);
                }
                }
            }
        });
        previousLatLon=toPosition;// reassign the previous location to current location
    }

【讨论】：

【解决方案6】：

希望这个答案能帮助你。而不是 gps 使用 Google Fused Api Read Documentation Here For Fused Api 并阅读这个答案 how To Make Bus Marker Move

试试这个教程链接以更好地理解Fused Api Example

【讨论】：

【解决方案7】：

在清单中添加这些行

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

然后使用这个类

public class MainActivity extends AppCompatActivity implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {

GoogleMap mgoogleMap;
GoogleApiClient mgoogleApi;
Context context;
Marker marker;
LocationRequest locationrequest;
public static final int map=1111;
public static final int coarse=1112;

@Override
protected void onCreate(Bundle savedInstanceState) {
    if (googleServiceAvalable()) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        context = getApplicationContext();
        checkReadPermission();
        checkCoarsePermission();
        initMap();
    } else {

    }

}
public boolean googleServiceAvalable() {
    GoogleApiAvailability api = GoogleApiAvailability.getInstance();
    int isavailable = api.isGooglePlayServicesAvailable(this);
    if (isavailable == ConnectionResult.SUCCESS) {
        return true;
    } else if (api.isUserResolvableError(isavailable)) {
        Dialog dialog = api.getErrorDialog(this, isavailable, 0);
        dialog.show();
    } else {
        Toast.makeText(this, "cant connect to play services", Toast.LENGTH_LONG).show();
    }
    return false;
}

private void initMap() {
    MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.fragment);
    mapFragment.getMapAsync(this);
}

@Override
public void onMapReady(GoogleMap googleMap) {
    mgoogleMap = googleMap;
    if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.M){
        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;
        }
    }
    mgoogleMap.setMyLocationEnabled(true);

    if(checkCoarsePermission() && checkReadPermission()){
        mgoogleApi = new GoogleApiClient.Builder(this)
                .addApi(LocationServices.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();

        mgoogleApi.connect();
    }else {
        checkReadPermission();
        checkCoarsePermission();
    }
}

private void goToLocation(double latitude, double longitude, int i) {
    LatLng ll = new LatLng(latitude, longitude);
    CameraUpdate update = CameraUpdateFactory.newLatLngZoom(ll, i);
    mgoogleMap.animateCamera(update);

    if(marker !=null){
        marker.remove();
    }

    MarkerOptions options =new MarkerOptions()
            .title("Test")
            .draggable(true)
            .position(new LatLng(latitude,longitude ));
    marker= mgoogleMap.addMarker(options);
}

@Override
public void onConnected(@Nullable Bundle bundle) {
    locationrequest = new LocationRequest().create();
    locationrequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    locationrequest.setInterval(1000);

    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;
    }
    LocationServices.FusedLocationApi.requestLocationUpdates(mgoogleApi, locationrequest, this);
    Toast.makeText(context,"Location Connected and ready to publish",Toast.LENGTH_SHORT).show();
}

@Override
public void onConnectionSuspended(int i) {
    Toast.makeText(context,"Location Connection Suspended",Toast.LENGTH_SHORT);
}

@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
    Toast.makeText(context,"Location Connection Failed"+connectionResult.getErrorMessage(),Toast.LENGTH_SHORT);
}

@Override
public void onLocationChanged(Location location) {
    if(location==null){
        Toast.makeText(context,"Cant Find User Location",Toast.LENGTH_SHORT);
    }else {
        LatLng ll=new LatLng(location.getLatitude(),location.getLongitude());
        goToLocation(ll.latitude,ll.longitude,18);
    }
}

@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public boolean checkReadPermission() {
    int currentAPIVersion = Build.VERSION.SDK_INT;
    if (currentAPIVersion >= android.os.Build.VERSION_CODES.M) {
        if (ContextCompat.checkSelfPermission(getApplicationContext(), android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            if (ActivityCompat.shouldShowRequestPermissionRationale((Activity) MainActivity.this, android.Manifest.permission.ACCESS_FINE_LOCATION)) {
                AlertDialog.Builder alertBuilder = new AlertDialog.Builder(MainActivity.this);
                alertBuilder.setCancelable(true);
                alertBuilder.setTitle("Permission necessary");
                alertBuilder.setMessage("Read Internal Storage permission required to display images!!!");
                alertBuilder.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
                    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
                    public void onClick(DialogInterface dialog, int which) {
                        ActivityCompat.requestPermissions((Activity) MainActivity.this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, map);
                    }
                });
                AlertDialog alert = alertBuilder.create();
                alert.show();
            } else {
                ActivityCompat.requestPermissions((Activity) MainActivity.this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, map);
            }
            return false;
        } else {
            return true;
        }
    } else {
        return true;
    }
}

@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public boolean checkCoarsePermission() {
    int currentAPIVersion = Build.VERSION.SDK_INT;
    if (currentAPIVersion >= android.os.Build.VERSION_CODES.M) {
        if (ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            if (ActivityCompat.shouldShowRequestPermissionRationale((Activity) MainActivity.this, android.Manifest.permission.ACCESS_COARSE_LOCATION)) {
                AlertDialog.Builder alertBuilder = new AlertDialog.Builder(MainActivity.this);
                alertBuilder.setCancelable(true);
                alertBuilder.setTitle("Permission necessary");
                alertBuilder.setMessage("Read Internal Storage permission required to display images!!!");
                alertBuilder.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
                    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
                    public void onClick(DialogInterface dialog, int which) {
                        ActivityCompat.requestPermissions((Activity) MainActivity.this, new String[]{android.Manifest.permission.ACCESS_COARSE_LOCATION}, coarse);
                    }
                });
                AlertDialog alert = alertBuilder.create();
                alert.show();
            } else {
                ActivityCompat.requestPermissions((Activity) MainActivity.this, new String[]{android.Manifest.permission.ACCESS_COARSE_LOCATION}, coarse);
            }
            return false;
        } else {
            return true;
        }
    } else {
        return true;
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions,
                                       int[] grantResults) {
    switch (requestCode) {
        case map:
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

            } else {
                Toast.makeText(context,"You have to give permission",Toast.LENGTH_SHORT).show();
            }
            break;

        case coarse:
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

            } else {
                Toast.makeText(context,"You have to give permission",Toast.LENGTH_SHORT).show();
            }
            break;


    }
}}

【讨论】：

【解决方案8】：

如果您仍在寻找解决方案，希望 https://www.youtube.com/watch?v=WKfZsCKSXVQ 对您有所帮助。我在我的一个应用程序中使用了它，它有助于将标记从一个位置动画化到另一个位置。源码可以在这里https://gist.github.com/broady/6314689获取。

您可能需要为标记添加旋转以显示标记的确切方向。以下是我用来查找方位的代码块。

    private float bearingBetweenLatLngs(LatLng begin, LatLng end) {
        Location beginL = convertLatLngToLocation(begin);
        Location endL = convertLatLngToLocation(end);

        return beginL.bearingTo(endL);
    }

【讨论】：