android - 如何在Android中以编程方式获取当前GPS位置？(How do I get the current GPS location programmatically in Android?)

Question

I need to get my current location using GPS programmatically.

(我需要以编程方式使用GPS获取当前位置。)

How can i achieve it?

(我该如何实现？)

  ask by mudit translate from so

Answer 1

I have created a small application with step by step description to get current location's GPS coordinates.

(我创建了一个带有逐步说明的小型应用程序，以获取当前位置的GPS坐标。)

Complete example source code is in Get Current Location coordinates , City name - in Android .

(完整的示例源代码位于Android中的“ 获取当前位置”坐标中，“城市名称”中 。)

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See how it works:

(看看它怎么运作：)

• All we need to do is add this permission in the manifest file:

  (我们需要做的就是在清单文件中添加此权限：)

   <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 

• And create a LocationManager instance like this:

  (并创建一个LocationManager实例，如下所示：)

   LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 

• Check if GPS is enabled or not.

  (检查是否启用了GPS。)

• And then implement LocationListener and get coordinates:

  (然后实现LocationListener并获取坐标：)

   LocationListener locationListener = new MyLocationListener(); locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 5000, 10, locationListener); 

• Here is the sample code to do so

  (这是这样做的示例代码)

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/*---------- Listener class to get coordinates ------------- */
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 + "
" + latitude + "

My 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) {}
}

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