如何在不在 android 中的 Activity 上添加地图片段的情况下获取我的位置？

Question

我获得了位置权限并创建了服务，但是我不知道如何在不添加地图片段的情况下从服务中获取我的位置。我需要获取我的位置并在我的 TextView 上设置文本。 //我不需要在此处获取片段 activity 我需要在 TextView 中使用 post 方法吗？以及如何从服务中获取位置信息？请帮我！谢谢

这是我的 MainActivity.java 扩展 PermissionActivity

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

}

@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
    switch (compoundButton.getId()) {
        case R.id.locationSwitch:
            Constants.checkFineLocationPermission(MainActivity.this);
            if(compoundButton.isChecked()){
                Intent intent = new Intent(MainActivity.this, LocationService.class);
                startService(intent);
            }else {
                Intent intent = new Intent(MainActivity.this, LocationService.class);
                stopService(intent);
            }
            break;
    }

}

这是 PermissionActivity。

    public void onRequestPermissionsResult(int requestCode, String permissions[],int[] grantResults){
        switch (requestCode){
            case MY_PERMISSIONS_REQUEST_FINE_LOCATION:{
                if(grantResults.length>0 && grantResults[0]== PackageManager.PERMISSION_GRANTED){
                    Intent intent = new Intent(getApplicationContext(),getClass());
                    startActivity(intent);
                    finish();
                }else{
                    // Log.d("Permission always denyed");
                    Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS)
                            .setData(Uri.parse("package:"+ getApplicationContext().getPackageName()));
                    startActivity(intent);
                }
                return;
            }

        }
    }

这是服务

private class LocationListener implements android.location.LocationListener
{
    Location mLastLocation;

    public LocationListener(String provider)
    {
        Log.e(TAG, "LocationListener " + provider);
        mLastLocation = new Location(provider);
    }

    @Override
    public void onLocationChanged(Location location)
    {
        Log.e(TAG, "onLocationChanged: " + location);
        mLastLocation.set(location);
    }

    @Override
    public void onProviderDisabled(String provider)
    {
        Log.e(TAG, "onProviderDisabled: " + provider);
    }

    @Override
    public void onProviderEnabled(String provider)
    {
        Log.e(TAG, "onProviderEnabled: " + provider);
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras)
    {
        Log.e(TAG, "onStatusChanged: " + provider);
    }
}

LocationListener[] mLocationListeners = new LocationListener[] {
        new LocationListener(LocationManager.GPS_PROVIDER),
        new LocationListener(LocationManager.NETWORK_PROVIDER)
};

@Override
public IBinder onBind(Intent arg0)
{
    return null;
}

@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
    Log.e(TAG, "onStartCommand");
    super.onStartCommand(intent, flags, startId);
    return START_STICKY;
}

@Override
public void onCreate()
{
    Log.e(TAG, "onCreate");
    initializeLocationManager();
    try {
        mLocationManager.requestLocationUpdates(
                LocationManager.NETWORK_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
                mLocationListeners[1]);
    } catch (java.lang.SecurityException ex) {
        Log.i(TAG, "fail to request location update, ignore", ex);
    } catch (IllegalArgumentException ex) {
        Log.d(TAG, "network provider does not exist, " + ex.getMessage());
    }
    try {
        mLocationManager.requestLocationUpdates(
                LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
                mLocationListeners[0]);
    } catch (java.lang.SecurityException ex) {
        Log.i(TAG, "fail to request location update, ignore", ex);
    } catch (IllegalArgumentException ex) {
        Log.d(TAG, "gps provider does not exist " + ex.getMessage());
    }
}

@Override
public void onDestroy()
{
    Log.e(TAG, "onDestroy");
    super.onDestroy();
    if (mLocationManager != null) {
        for (int i = 0; i < mLocationListeners.length; i++) {
            try {
                mLocationManager.removeUpdates(mLocationListeners[i]);
            } catch (Exception ex) {
                Log.i(TAG, "fail to remove location listners, ignore", ex);
            }
        }
    }
}

private void initializeLocationManager() {
    Log.e(TAG, "initializeLocationManager");
    if (mLocationManager == null) {
        mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
    }
}

}

Answer 1

尝试使用这个class 通过调用

private void getCurrentLocation() {
    GPSTracker gps = new GPSTracker(activity);

    // check if GPS enabled
    if (gps.canGetLocation()) {

        double latitude = gps.getLatitude();
        double longitude = gps.getLongitude();

  // Do What you want to do 
   }
}

public class GPSTracker extends Service implements LocationListener {

    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 = 10; // 10 meters

    // The minimum time between updates in milliseconds
    private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute

    // Declaring a Location Manager
    protected LocationManager locationManager;

    public GPSTracker(Context context) {
        this.mContext = context;
        getLocation();
    }

    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) {
                // no network provider is enabled
            } else {
                this.canGetLocation = true;
                // First get location from Network Provider
                if (isNetworkEnabled) {
                    try {
                        locationManager.requestLocationUpdates(
                                LocationManager.NETWORK_PROVIDER,
                                MIN_TIME_BW_UPDATES,
                                MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                        Log.e("Network", "Network");
                        if (locationManager != null) {
                            location = locationManager
                                    .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                            if (location != null) {
                                latitude = location.getLatitude();
                                longitude = location.getLongitude();
                            }
                        }
                    } catch (SecurityException e) {
                        Log.e("SecurityException", " 1 " + e.toString());
                    }
                }
                // if GPS Enabled get lat/long using GPS Services
                if (isGPSEnabled) {
                    if (location == null) {
                        try {
                            locationManager.requestLocationUpdates(
                                    LocationManager.GPS_PROVIDER,
                                    MIN_TIME_BW_UPDATES,
                                    MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                            Log.e("GPS Enabled", "GPS Enabled");
                            if (locationManager != null) {
                                location = locationManager
                                        .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                                if (location != null) {
                                    latitude = location.getLatitude();
                                    longitude = location.getLongitude();
                                }
                            }
                        } catch (SecurityException e) {
                            Log.e("SecurityException", " 2 " + e.toString());
                        }
                    }
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }

        return location;
    }


    public void stopUsingGPS() {
        if (locationManager != null) {
            try {
                locationManager.removeUpdates(GPSTracker.this);
            } catch (SecurityException e) {
                Log.e("SecurityException", " 3 " + e.toString());
            }

        }
    }


    public double getLatitude() {
        if (location != null) {
            latitude = location.getLatitude();
        }

        // return latitude
        return latitude;
    }

    public double getLongitude() {
        if (location != null) {
            longitude = location.getLongitude();
        }

        // return longitude
        return longitude;
    }


    public boolean canGetLocation() {
        return this.canGetLocation;
    }


    public void showSettingsAlert(final Activity activity) {

        new MaterialDialog.Builder(activity)
                .title(R.string.EnableGPS_st)
                .content(R.string.GPSSittings_st)
                .contentColor(UiConstants.Colors.colorBlack)
                .titleColor(UiConstants.Colors.colorBlack)
                .positiveColor(UiConstants.Colors.colorBlack)
                .negativeColor(UiConstants.Colors.colorBlack)
                .positiveText(R.string.Settings_st)
                .negativeText(R.string.cancel_st)
                .callback(new MaterialDialog.ButtonCallback() {
                    @Override
                    public void onPositive(MaterialDialog dialog) {
                        dialog.dismiss();

                        Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                        activity.startActivity(intent);
                    }
                    @Override
                    public void onNegative(MaterialDialog dialog) {
                        super.onNegative(dialog);
                        dialog.dismiss();
                    }
                }).cancelable(false)
                .show();
    }

    @Override
    public void onLocationChanged(Location location) {

    }

    @Override
    public void onProviderDisabled(String provider) {
    }

    @Override
    public void onProviderEnabled(String provider) {
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
    }

    @Override
    public IBinder onBind(Intent arg0) {
        return null;
    }
}

Answer 2

您应该使用 Google 融合定位服务。它提供了最准确的位置。学习教程 here and here。所以基本上只是把这些东西投入使用。

如何在不在 android 中的 Activity 上添加地图片段的情况下获取我的位置？

How can I get my location without adding Map fragment on Activity in android?

java

gps

android

android-service

android-location