Question

我尝试在按钮点击中获取位置。我写了LocationListener方法，一切正常。这是我的来源

private class MyLocationListener implements LocationListener {

    @Override
    public void onLocationChanged(Location loc) {
        editLocation.setText("");
        pb.setVisibility(View.INVISIBLE);
        Toast.makeText(
                getBaseContext(),
                "Location changed: Lat: " + loc.getLatitude() + " Lng: "
                    + loc.getLongitude(), Toast.LENGTH_SHORT).show();
        String longitude = "Longitude: " + loc.getLongitude();
        Log.v(TAG, longitude);
        String latitude = "Latitude: " + loc.getLatitude();
        Log.v(TAG, latitude);

        /*------- To get city name from coordinates -------- */
        String cityName = null;
        Geocoder gcd = new Geocoder(getBaseContext(), Locale.getDefault());
        List<Address> addresses;
        try {
            addresses = gcd.getFromLocation(loc.getLatitude(),
                    loc.getLongitude(), 1);
            if (addresses.size() > 0) {
                System.out.println(addresses.get(0).getLocality());
                cityName = addresses.get(0).getLocality();
            }
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        String s = longitude + "\n" + latitude + "\n\nMy Current City is: "
            + cityName;
        editLocation.setText(s);
    }

    @Override
    public void onProviderDisabled(String provider) {}

    @Override
    public void onProviderEnabled(String provider) {}

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

我可以使用LocationListener检查纬度和经度，但是如何在按钮点击中获取当前位置？

Answer 1

您是从LocationManager::getLastKnownLocation()

获取的

LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

Answer 2

这是我为我的应用程序工作的代码。您可以尝试获取位置。

int num;
while ((num = stdin.nextInt()) > 0) {
    if (num % 2 == 0) { // <-- stop condition is checked before here.
        System.out.print(num + " ");
    }
}

以及获取数据的方法。

 ro_gps_icon.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
            if (ActivityCompat.checkSelfPermission(RODetailsActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(RODetailsActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                return;
            }           locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 30000, 0, (LocationListener) RODetailsActivity.this);
            Criteria criteria = new Criteria();
            String bestProvider = locationManager.getBestProvider(criteria, true);
            Location location = locationManager.getLastKnownLocation(bestProvider);

            if (location == null) {
                Toast.makeText(getApplicationContext(), "GPS signal not found", Toast.LENGTH_SHORT).show();
            }
            if (location != null) {
                Log.e("locatin", "location--" + location);

                Log.e("latitude at beginning",
                        "@@@@@@@@@@@@@@@" + location.getLatitude());
                onLocationChanged(location);
            }
        }
    });

Android点按钮获取位置

2 个答案: