Question

这是更新的东西，需要用不同的方法或其他方法完成吗？

我想在谷歌地图上获取我当前正在做的事情如下所示。

创建GoogleMaps活动，从Android SDK Manager下载GooglePlay服务，在AndroidManifest中为Internet和位置授予权限，

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

授予在OnMapReady

中使用我的位置的权限

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

    mMap.setMapType(googleMap.MAP_TYPE_TERRAIN);

    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        return;
    }
    mMap.setMyLocationEnabled(true);
}

当我尝试在我的设备LG Spirit H440上运行此代码时，我没有得到我期望得到的内容，它应该让我可以选择在地图上用蓝点获取当前位置。

我还在Google API的控制台中创建了API KEY。

我做错了什么？

Answer 1

尝试使用此代码

public void onMapReady(GoogleMap googleMap) {
            mMap = googleMap;


            locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
            locationListener = new LocationListener() {
                @Override
                public void onLocationChanged(Location location) {
                    mMap.clear();
                    LatLng userLocation = new LatLng(location.getLatitude(), location.getLongitude());
                    mMap.addMarker(new MarkerOptions().position(userLocation).title("Your Location"));
                    mMap.moveCamera(CameraUpdateFactory.newLatLng(userLocation));
                }

                @Override
                public void onStatusChanged(String s, int i, Bundle bundle) {

                }

                @Override
                public void onProviderEnabled(String s) {

                }

                @Override
                public void onProviderDisabled(String s) {

                }
            };

if (ContextCompat.checkSelfPermission(this,Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION},1);
            } else {
                locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
                Location lastKnownLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

                mMap.clear();
                LatLng userLocation = new LatLng(lastKnownLocation.getLatitude(), lastKnownLocation.getLongitude());
                mMap.addMarker(new MarkerOptions().position(userLocation).title("Your Location"));
                mMap.moveCamera(CameraUpdateFactory.newLatLng(userLocation));
            }

onRequestPermissionsResult：

public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        if (requestCode == 1) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
                    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
                }
            }
        }
    }

另外，当您创建API密钥时，我相信您已将其包含在AndroidManifest中。

Source Rob Percival / Nick Walter。

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