如何在没有在Android中的Activity上添加Map片段的情况下获取我的位置?

时间:2017-10-02 06:57:38

标签: java android gps android-service android-location

我获得了位置许可并提供了服务,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TextView上设置Text。 //我不需要在此活动中获得片段 我需要在TextView中使用post方法吗?如何从服务中获取位置? 请帮我!感谢

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);
    }
}

}

2 个答案:

答案 0 :(得分:1)

您应该使用Google Fused Location Service。它提供了最准确的位置。参加教程herehere。所以基本上只是把这些东西投入使用。

答案 1 :(得分:0)

尝试使用此课程 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;
    }
}