私は現在、ユーザーから最も近い場所を取得し、リスト ビューで並べ替える必要があるプロジェクトに取り組んでいます。
このステップに到達するまで、すべてが順調に進んでいます。ここで 1 週間立ち往生しており、解決方法がわかりません。
プログラムが開始されたときの経度と緯度を取得したい。私はそれにフラグメントを使用しています。ユーザーがフラグメントを開くと、現在のユーザーの位置から緯度と経度が自動的に取得されます。
ここでは、サービスを使用して GPS の緯度と経度を取得します。しかし、それはまったく機能しません。緯度と経度は常に 0 の値で返されます。
これを解決する方法を教えてください。ありがとう。
NB これは私の GPSTracker.java コードです
public class GPSTrackStandAlone extends Service implements LocationListener {
private LocationRequest mLocationRequest;
private GoogleApiClient mGoogleApiClient;
private Context mContext;
private boolean canGetLocation = false;
private Location mLocation;
private double mLatitude;
private double mLongitude;
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATE = 10;
private static final long MIN_TIME_FOR_UPDATE = 60000;
private LocationManager mLocationManager;
private static final long INTERVAL = 1000 * 10;
private static final long FASTEST_INTERVAL = 1000 * 5;
public GPSTrackStandAlone(Context mContext) {
this.mContext = mContext;
}
public Location getLocation() {
try {
LocationManager mLocationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);
/*getting status of the gps*/
Boolean isGpsEnabled = mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
/*getting status of network provider*/
Boolean isNetworkEnabled = mLocationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGpsEnabled && !isNetworkEnabled) {
/*no location provider enabled*/
} else {
this.canGetLocation = true;
/*getting location from network provider*/
if (isNetworkEnabled) {
if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
|| ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
mLocationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_FOR_UPDATE,
MIN_DISTANCE_CHANGE_FOR_UPDATE, this);
Log.d("Perms", "Permission for GPS Granted");
if (mLocationManager != null) {
mLocation = mLocationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (mLocation != null) {
mLatitude = mLocation.getLatitude();
mLongitude = mLocation.getLongitude();
}
}
}
/*if gps is enabled then get location using gps*/
if (isGpsEnabled) {
if (mLocation == null) {
mLocationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_FOR_UPDATE,
MIN_DISTANCE_CHANGE_FOR_UPDATE, this);
Log.d("GPS Enabled", "GPS Enabled");
if (mLocationManager != null) {
mLocation = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (mLocation != null) {
mLatitude = mLocation.getLatitude();
mLongitude = mLocation.getLongitude();
}
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return mLocation;
}
/**
* call this function to stop using gps in your application
*/
public void stopUsingGps() {
if (mLocationManager != null) {
if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
|| ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
mLocationManager.removeUpdates(GPSTrackStandAlone.this);
}
}
}
private boolean isGooglePlayServicesAvailable() {
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (ConnectionResult.SUCCESS == status) {
return true;
} else {
Toast.makeText(GPSTrackStandAlone.this, "isGooglePlayServiceAvailable = False", Toast.LENGTH_SHORT).show();
return false;
}
}
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
public double getLatitude() {
if (mLocation != null) {
mLongitude = mLocation.getLongitude();
Log.d("MGPS", String.valueOf(mLocation.getLatitude()));
}
return mLongitude;
}
public double getLongitude() {
Log.d("function", "getLongitude at GPSTrack");
if (mLocation != null) {
mLongitude = mLocation.getLongitude();
Log.d("MGPS", String.valueOf(mLocation.getLatitude()));
}
return mLongitude;
}
public boolean canGetLocation() {
return this.canGetLocation;
}
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
}
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}