我正在使用此代码，但无法正常工作。
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
if (locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER))
{
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) !=
PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this,
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;
}
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
0, 0, new LocationListener() {
@Override
public void onLocationChanged(Location location) {
//get latitude
double latitude = location.getLatitude();
//get Longtitude
double longitude = location.getLongitude();
LatLng latLng = new LatLng(latitude, longitude);
// Toast.makeText(getApplicationContext(), latitude+" "+longitude,
Toast.LENGTH_LONG).show();
Geocoder geocoder = new Geocoder(getApplicationContext());
try {
List<Address> addresses = geocoder.getFromLocation(latitude, longitude, 1);
String str = addresses.get(0).getLocality() + ",";
str += addresses.get(0).getCountryName();
mMap.addMarker(new MarkerOptions().position(latLng).title(str));
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, 18));
} 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) {
//get latitude
double latitude = location.getLatitude();
//get Longtitude
double longitude = location.getLongitude();
LatLng latLng = new LatLng(latitude, longitude);
Geocoder geocoder = new Geocoder(getApplicationContext());
try {
List<Address> addresses = geocoder.getFromLocation(latitude,longitude,1);
String str = addresses.get(0).getLocality()+",";
str +=addresses.get(0).getCountryName();
mMap.addMarker(new MarkerOptions().position(latLng).title(str));
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, 18));
} 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) {
}
});
如何解决这个问题？
答案 0 :(得分：0)
清单中是否具有权限？
$datetime = Carbon::parse('2019-03-13T18:07:54.5810814+03:30');
dump($datetime);
// Carbon @1552487874 {#358
// date: 2019-03-13 18:07:54.581081 +03:30
// }
这是我可以使用的代码。 您可以忽略某些评论内容，在我的情况下，我使用片段，因此您可能需要进行一些更改以适应您的需求。
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
以及要在哪里使用它：
import android.Manifest;
import android.app.Activity;
import android.app.Application;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.provider.Settings;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.util.Log;
import android.widget.Button;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
import static android.content.ContentValues.TAG;
import static android.support.v4.app.ActivityCompat.requestPermissions;
public class GPSTracker extends Service implements LocationListener {
boolean asked = false;
public Boolean update = true;
private final Context mContext;
// flag for GPS status
boolean isGPSEnabled = false;
// flag for network status
boolean isNetworkEnabled = false;
// 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 = 100000; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 20; // 1 minute
// Declaring a Location Manager
protected LocationManager locationManager;
private static final int PERMISSION_REQUEST_CODE = 1;
private static final String TAG_RUNTIME_PERMISSION = "TAG_RUNTIME_PERMISSION";
public GPSTracker(Context context) {
this.mContext = context;
if (getUpdate()) {
getLocation();
}
}
public static class LocationAddress {
private static final String TAG = "LocationAddress";
public void getAddressFromLocation(final double latitude, final double longitude,
final Context context, final Handler handler) {
Thread thread = new Thread() {
@Override
public void run() {
Geocoder geocoder = new Geocoder(context, Locale.getDefault());
String result = null;
try {
List<Address> addressList = geocoder.getFromLocation(
latitude, longitude, 1);
if (addressList != null && addressList.size() > 0) {
Address address = addressList.get(0);
StringBuilder sb = new StringBuilder();
for (int i = 0; i < address.getMaxAddressLineIndex(); i++) {
sb.append(address.getAddressLine(i)).append("\n");
}
sb.append(address.getLocality()).append("\n");
sb.append(address.getPostalCode()).append("\n");
sb.append(address.getCountryName());
result = sb.toString();
Log.e("address", result);
}
} catch (IOException e) {
Log.e(TAG, "Unable connect to Geocoder", e);
} finally {
Message message = Message.obtain();
message.setTarget(handler);
if (result != null) {
Dan latlong = new Dan();
float[] izid = new float[1];
// Location.distanceBetween(latitude,longitude,latlong.getBiljeLatitude(), latlong.getBiljeLongtitude(),izid);
// float min=izid[0];
// izid[0] = 0;
// Location.distanceBetween(latitude,longitude,latlong.getLjubljanaLatitude(), latlong.getLjubljanaLongtitude(),izid);
// if(izid[0]>min){Log.e("Krajsa razdalja je min", String.valueOf(min));}
// else Log.e("Krajsa razdalja je izid", String.valueOf(izid[0]));
// Log.e("min - Bilje", String.valueOf(min));
// Log.e("Izid - Lj", String.valueOf(izid[0]));
message.what = 1;
Bundle bundle = new Bundle();
result = "Latitude: " + latitude + " Longitude: " + longitude +
"\n\nAddress:\n" + result;
bundle.putString("address", result);
message.setData(bundle);
} else {
message.what = 1;
Bundle bundle = new Bundle();
result = "Latitude: " + latitude + " Longitude: " + longitude +
"\n Unable to get address for this lat-long.";
bundle.putString("address", result);
message.setData(bundle);
}
message.sendToTarget();
}
}
};
thread.start();
}
}
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 && !isNetworkEnabled) {
showSettingsAlert();
} else {
this.canGetLocation = true;
if (isNetworkEnabled) {
if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
requestRuntimePermission(getApplication(), Manifest.permission.ACCESS_FINE_LOCATION, PERMISSION_REQUEST_CODE);
}
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();
}
}
}
// 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();
setUpdate(false);
}
}
}
}
}
} 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
* */
public double getLongitude(){
if(location != null){
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
public boolean getUpdate(){
return update;
}
public void setUpdate(boolean update){
this.update = update;
}
/**
* Function to check GPS/wifi enabled
* @return boolean
* */
public boolean canGetLocation() {
if(!asked) {
requestRuntimePermission(getApplication(), Manifest.permission.ACCESS_FINE_LOCATION, PERMISSION_REQUEST_CODE);
asked=true;
}
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);
Button positiveButton = ((AlertDialog) dialog).getButton(AlertDialog.BUTTON_POSITIVE);
positiveButton.setBackgroundColor(Color.parseColor("#FFE1FCEA"));
positiveButton.setTextColor(Color.parseColor("#000"));
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
private boolean hasRuntimePermission(Context context, String runtimePermission) {
boolean ret = false;
// Get current android os version.
int currentAndroidVersion = Build.VERSION.SDK_INT;
// Build.VERSION_CODES.M's value is 23.
if (currentAndroidVersion > Build.VERSION_CODES.M) {
// Only android version 23+ need to check runtime permission.
if (ContextCompat.checkSelfPermission(context, runtimePermission) == PackageManager.PERMISSION_GRANTED) {
ret = true;
}
} else {
ret = true;
}
return ret;
}
//
// /* Request app user to allow the needed runtime permission.
// It will popup a confirm dialog , user can click allow or deny. */
private void requestRuntimePermission(Application activity, String runtimePermission, int requestCode) {
Log.e(TAG, "requesting" );
requestPermissions((Activity)mContext, new String[]{runtimePermission}, requestCode);
}
@Override
public void onLocationChanged(Location location) {
setUpdate(true);
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
}
用于测试的布局：
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.provider.Settings;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.app.AlertDialog;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class Tab5Fragment extends Fragment {
TextView tvAddress;
Button btnShowLocation;
GPSTracker gps;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.tab5, container, false);
tvAddress = view.findViewById(R.id.tvAddress);
btnShowLocation = view.findViewById(R.id.btnShowLocation);
// Show location button click event
btnShowLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Create class object
gps = new GPSTracker(getActivity());
// Check if GPS enabled
if (gps.canGetLocation()) {
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();
GPSTracker.LocationAddress locationAddress = new GPSTracker.LocationAddress();
locationAddress.getAddressFromLocation(latitude, longitude,
getContext(), new GeocoderHandler());
// \n is for new line
Toast.makeText(getActivity(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
String result = "Latitude: " + latitude + " Longitude: " + longitude;
tvAddress.setText(result);
} else {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(getActivity());
// Setting DialogHelp Title
alertDialog.setTitle("GPS is settings");
// Setting DialogHelp 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);
getActivity().startActivity(intent);
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
alertDialog.show();
}
}
});
return view;
}
class GeocoderHandler extends Handler {
@Override
public void handleMessage(Message message) {
String locationAddress;
switch (message.what) {
case 1:
Bundle bundle = message.getData();
locationAddress = bundle.getString("address");
break;
default:
locationAddress = null;
}
tvAddress.setText(locationAddress);
}
}
}