我想访问片段中的当前位置，但是我正在使用API 28和android版本3.2.1。我尝试了互联网上的所有教程，但我无法访问我的当前位置，我的代码中没有错误，但是我不知道为什么我无法访问它。当我运行程序时，我只会看到google默认地图，没有标记等。 如果网络提供商不可用，我想通过网络提供商以及gps提供商访问我的位置。 我也在清单中添加权限
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
对于权限访问，我正在使用来自github的库，以及用于lamination和map
implementation 'pub.devrel:easypermissions:2.0.0'
implementation 'com.google.android.gms:play-services-maps:16.0.0'
implementation 'com.google.android.gms:play-services-location:16.0.0'
请检查我的代码，并指导我如何访问我的代码所在的当前位置，在我的代码下面，还有步数计数器代码，但忽略该代码。
这是我的代码
public class HomeActivity extends Fragment implements SensorEventListener, OnMapReadyCallback {
SensorManager sensorManager;
TextView set_steps;
TextView set_calories;
TextView set_distance;
boolean running = false;
private static int steps;
private static int calories;
private static double distance;
private GoogleMap mMap;
LocationManager locationManager;
public static final int Request_User_Location_Code = 99;
GoogleApiClient googleApiClient;
private LocationRequest locationRequest;
private Location lastLocation;
private Marker currentUserLocationMarker;
private final int REQUEST_LOCATION_PERMISSION = 1;
Provider provider;
View view;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
view = inflater.inflate(R.layout.activity_home, container, false);
requestLocationPermission();
stepsCounter();
locationTracker();
return view;
}
void stepsCounter() {
set_steps = (TextView) view.findViewById(R.id.set_steps);
set_calories = (TextView) view.findViewById(R.id.set_calories);
set_distance = (TextView) view.findViewById(R.id.set_distance);
sensorManager = (SensorManager) getActivity().getSystemService(Context.SENSOR_SERVICE);
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void onResume() {
super.onResume();
running = true;
Sensor countSensor = sensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER);
if (countSensor != null) {
sensorManager.registerListener((SensorEventListener) getActivity(), countSensor, SensorManager.SENSOR_DELAY_UI);
} else {
Toast.makeText(getActivity(), "Sensor not Found", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onPause() {
super.onPause();
running = false;
}
@Override
public void onSensorChanged(SensorEvent event) {
if (running) {
steps = (int) event.values[0];
set_steps.setText(steps + "");
caloriesCounter();
distanceCover();
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
void caloriesCounter() {
calories = steps / 20;
set_calories.setText(calories + "");
}
void distanceCover() {
distance = (double) steps * 0.76;
String distanceText = Double.toString(distance);
set_distance.setText(distanceText);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
}
void locationTracker() {
SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);
if ((ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) && (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)) {
}
if (locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, new LocationListener() {
@Override
public void onLocationChanged(Location location) {
double latitude = location.getLatitude();
double longitude = location.getLongitude();
LatLng latLng= new LatLng(latitude,longitude);
Geocoder geocoder=new Geocoder(getActivity().getApplicationContext());
try {
List<Address> addressList = geocoder.getFromLocation(latitude,longitude,1);
String str = addressList.get(0).getLocality()+",";
str+= addressList.get(0).getCountryName();
mMap.addMarker(new MarkerOptions().position(latLng).title(str));
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
});
} else if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, new LocationListener() {
@Override
public void onLocationChanged(Location location) {
double latitude = location.getLatitude();
double longitude = location.getLongitude();
LatLng latLng= new LatLng(latitude,longitude);
Geocoder geocoder=new Geocoder(getActivity().getApplicationContext());
try {
List<Address> addressList = geocoder.getFromLocation(latitude,longitude,1);
String str = addressList.get(0).getLocality()+",";
str+= addressList.get(0).getCountryName();
mMap.addMarker(new MarkerOptions().position(latLng).title(str));
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
});
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
// Forward results to EasyPermissions
EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);
}
@AfterPermissionGranted(REQUEST_LOCATION_PERMISSION)
public void requestLocationPermission() {
String[] perms = {Manifest.permission.ACCESS_FINE_LOCATION};
if(EasyPermissions.hasPermissions(getActivity(), perms)) {
// Toast.makeText(getActivity(), "Permission already granted", Toast.LENGTH_SHORT).show();
}
else {
EasyPermissions.requestPermissions(this, "Please grant the location permission", REQUEST_LOCATION_PERMISSION, perms);
}
}
}
但是请记住我正在使用ApI 28