如何在Android中通过纬度和经度获取城市名称？

Question

我希望按当前位置的城市名称,但我有纬度和经度.如何获得它？我用按钮点击然后我得到双倍经纬度值.我的代码在下面.请帮助我.

谢谢!!

Button btnShowLocation;

    GPSTracker gps;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        btnShowLocation = (Button) findViewById(R.id.btnShowLocation);

        // show location button click event
        btnShowLocation.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {       
                // create class object
                gps = new GPSTracker(AndroidGPSTrackingActivity.this);

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

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

                    // \n is for new line
                    Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();    
                }else{

                    gps.showSettingsAlert();
                }

            }
        });

我编辑下面的代码,但没有得到cityname请帮助我!

Button btnShowLocation;

    GPSTracker gps;
    String CityName;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        btnShowLocation = (Button) findViewById(R.id.btnShowLocation);

        // show location button click event
        btnShowLocation.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // create class object
                gps = new GPSTracker(AndroidGPSTrackingActivity.this);

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

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

                    Geocoder geocoder = new Geocoder(
                            AndroidGPSTrackingActivity.this, Locale
                                    .getDefault());
                    List<Address> addresses;
                    try {
                        Log.v("log_tag", "latitude" + latitude);
                        Log.v("log_tag", "longitude" + longitude);
                        addresses = geocoder.getFromLocation(latitude,
                                longitude, 1);
                        Log.v("log_tag", "addresses+)_+++" + addresses);
                        CityName = addresses.get(0).getAddressLine(0);
                        Log.v("log_tag", "CityName" + CityName);
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                    // \n is for new line
                    Toast.makeText(
                            getApplicationContext(),
                            "Your Location is - \nLat: " + latitude
                                    + "\nLong: " + longitude, Toast.LENGTH_LONG)
                            .show();
                } else {

                    gps.showSettingsAlert();
                }

            }
        });

但我在下面得到错误::::

03-11 17:01:46.465: W/System.err(27587): java.io.IOException: Service not Available
03-11 17:01:46.465: W/System.err(27587):    at android.location.Geocoder.getFromLocation(Geocoder.java:136)
03-11 17:01:46.465: W/System.err(27587):    at com.example.gpstracking.AndroidGPSTrackingActivity$1.onClick(AndroidGPSTrackingActivity.java:81)
03-11 17:01:46.465: W/System.err(27587):    at android.view.View.performClick(View.java:4191)
03-11 17:01:46.475: W/System.err(27587):    at android.view.View$PerformClick.run(View.java:17229)
03-11 17:01:46.475: W/System.err(27587):    at android.os.Handler.handleCallback(Handler.java:615)
03-11 17:01:46.475: W/System.err(27587):    at android.os.Handler.dispatchMessage(Handler.java:92)
03-11 17:01:46.475: W/System.err(27587):    at android.os.Looper.loop(Looper.java:137)
03-11 17:01:46.475: W/System.err(27587):    at android.app.ActivityThread.main(ActivityThread.java:4960)
03-11 17:01:46.475: W/System.err(27587):    at java.lang.reflect.Method.invokeNative(Native Method)
03-11 17:01:46.475: W/System.err(27587):    at java.lang.reflect.Method.invoke(Method.java:511)
03-11 17:01:46.475: W/System.err(27587):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
03-11 17:01:46.475: W/System.err(27587):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
03-11 17:01:46.475: W/System.err(27587):    at dalvik.system.NativeStart.main(Native Method)
03-11 17:02:21.335: W/IInputConnectionWrapper(27587): getSelectedText on inactive InputConnection
03-11 17:02:21.335: W/IInputConnectionWrapper(27587): setComposingText on inactive InputConnection
03-11 17:02:21.425: W/IInputConnectionWrapper(27587): getExtractedText on inactive InputConnection

Answer 1

用这个:

 Geocoder geocoder = new Geocoder(this, Locale.getDefault());
 List<Address> addresses = geocoder.getFromLocation(MyLat, MyLong, 1);
 String cityName = addresses.get(0).getAddressLine(0);
 String stateName = addresses.get(0).getAddressLine(1);
 String countryName = addresses.get(0).getAddressLine(2);

有关详细的谷歌地图示例,请查看以下链接:http: //www.demoadda.com/demo/android/load-googlemap_107

并为后台位置更新:http: //www.demoadda.com/demo/android/download-android-background-location-update-service-demo_21

Answer 2

在你的onClick上添加:

Geocoder gcd = new Geocoder(AndroidGPSTrackingActivity.this, Locale.getDefault());
List<Address> addresses = gcd.getFromLocation(latitude, longitude, 1);
if (addresses.size() > 0) 
    System.out.println(addresses.get(0).getLocality());

Answer 3

gps = new LocationAddress(getActivity());
if (gps.canGetLocation()) {
  double latitude = gps.getLatitude();
  double longitude = gps.getLongitude();
  Geocoder geocoder = new Geocoder(getActivity(), Locale.getDefault());
  //List<Address> addresses =geocoder.getFromLocation(latitude, longitude, 1);

  try {
    List < Address > addresses = geocoder.getFromLocation(latitude, longitude, 1);
    String address = addresses.get(0).getSubLocality();
    String cityName = addresses.get(0).getLocality();
    String stateName = addresses.get(0).getAdminArea();
    txt_paddress.setText(address);
    txt_city.setText(cityName);
    txt_state.setText(stateName);

  } catch (IOException e) {
    e.printStackTrace();
  }
} else {
  gps.showSettingsAlert();
}

Answer 4

使用它并将您的经纬度值传递给它。

    Geocoder geocoder;
    List<Address> addresses;
    geocoder = new Geocoder(getContext(), Locale.getDefault());

    try {
        addresses = geocoder. getFromLocation(latitude, longitude, 1); // Here 1 represent max location result to returned, by documents it recommended 1 to 5
        String address = addresses.get(0).getAddressLine(0); // If any additional address line present than only, check with max available address lines by getMaxAddressLineIndex()
        String city = addresses.get(0).getLocality();
        String state = addresses.get(0).getAdminArea();
        String country = addresses.get(0).getCountryName();else return NULL
    } catch (IOException e) {
        e.printStackTrace();
    }