java - 如何在 Android 上使用 GPS 输出位置

Question

我正在尝试将位置输出到 TextView 中。我已经使用了 locationManager.toString()，但它只会给我输出 android.location.LocationManager@44ee7718。我想输出位置，例如 Los Angeles, CA 90501。

LocationManager 的代码:

LocationManager lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
    //conversion
    Criteria criteria = new Criteria();
    String bp = lm.getBestProvider(criteria, false);
    Location location = lm.getLastKnownLocation(bp);
    double lat = location.getLatitude();
    double lon = location.getLongitude();
    Geocoder gc = new Geocoder(this, Locale.getDefault());
    List<Address> addresses = null;
        try{
            addresses = gc.getFromLocation(lat, lon, 1);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    Address address = addresses.get(0);
    final String ad = address.getAddressLine(0);
    //ends here

按钮的代码:

Red.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Intent intent = new Intent (Intent.ACTION_VIEW);
            intent.putExtra("sms_body", ad);
            intent.setType("vnd.android-dir/mms-sms");
            startActivity(intent);
        }
    });

Answer 1

尝试以下代码

try {
                // Get the location manager
    locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
                    Criteria criteria = new Criteria();
                    bestProvider = locationManager.getBestProvider(criteria, false);
                    Location location = locationManager
                            .getLastKnownLocation(bestProvider);
                    double lat = location.getLatitude();
                    double lon = location.getLongitude();
                    Geocoder gc = new Geocoder(this);
                    List<Address> lstAdd = gc.getFromLocation(lat, lon, 1);
                    Address ad = lstAdd.get(0);
                    String str = ad.getAddressLine(0);
                Toast tst = Toast.makeText(this, "Your current location is " + str,
                        Toast.LENGTH_LONG);
                tst.show();
} catch (Exception e) {
                Toast tst = Toast.makeText(this,"Please check your gps settings",
                        Toast.LENGTH_LONG);
                tst.show();
}

希望这有帮助。