Android移动设备实际上确实知道它在哪里 - 但有没有办法通过国家代码等方式检索国家?
无需了解确切的GPS位置 - 国家/地区就足够了
我首先考虑使用时区,但实际上我需要更多的信息,因为如果位置是纽约或利马,它会有所不同。
问题的背景:我有一个使用温度值的应用程序,我想将默认单位设置为Celsius或Fahrenheit,具体取决于位置是美国还是外部
答案 0 :(得分:126)
/**
* Get ISO 3166-1 alpha-2 country code for this device (or null if not available)
* @param context Context reference to get the TelephonyManager instance from
* @return country code or null
*/
public static String getUserCountry(Context context) {
try {
final TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
final String simCountry = tm.getSimCountryIso();
if (simCountry != null && simCountry.length() == 2) { // SIM country code is available
return simCountry.toLowerCase(Locale.US);
}
else if (tm.getPhoneType() != TelephonyManager.PHONE_TYPE_CDMA) { // device is not 3G (would be unreliable)
String networkCountry = tm.getNetworkCountryIso();
if (networkCountry != null && networkCountry.length() == 2) { // network country code is available
return networkCountry.toLowerCase(Locale.US);
}
}
}
catch (Exception e) { }
return null;
}
答案 1 :(得分:90)
这将获得country code:
String locale = context.getResources().getConfiguration().locale.getCountry();
还可以用getISO3Country()替换getCountry()以获取该国家/地区的3个字母的ISO代码。这将获得country name:
String locale = context.getResources().getConfiguration().locale.getDisplayCountry();
这似乎比其他方法更容易,并依赖于手机上的本地化设置,所以如果美国用户在国外,他们可能仍然需要华氏温度,这将有效:)
答案 2 :(得分:58)
实际上我发现使用TelephoneManager
的getSimCountryIso()方法还有一种获取国家/地区代码的方法:
TelephonyManager tm = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
String countryCode = tm.getSimCountryIso();
由于它是sim代码,因此在前往其他国家时也不应改变。
答案 3 :(得分:58)
使用此链接http://ip-api.com/json,这将以json的形式提供所有信息。从这个json你可以很容易地到达这个国家。此站点使用您当前的IP工作,它会自动检测IP和发送回复的详细信息。
文档http://ip-api.com/docs/api:json希望它有所帮助。
示例json
{
"status": "success",
"country": "United States",
"countryCode": "US",
"region": "CA",
"regionName": "California",
"city": "San Francisco",
"zip": "94105",
"lat": "37.7898",
"lon": "-122.3942",
"timezone": "America/Los_Angeles",
"isp": "Wikimedia Foundation",
"org": "Wikimedia Foundation",
"as": "AS14907 Wikimedia US network",
"query": "208.80.152.201"
}
注意:由于这是第三方解决方案,只有在其他人无法使用的情况下才能使用。
答案 4 :(得分:34)
首先,获取LocationManager。然后,致电LocationManager.getLastKnownPosition
。然后创建一个GeoCoder并调用GeoCoder.getFromLocation
。这是一个单独的线程!!这将为您提供Address
个对象的列表。致电Address.getCountryName
,你就明白了。
请记住,最后一个已知位置可能有点陈旧,因此如果用户刚刚越过边界,您可能暂时不知道它。
答案 5 :(得分:13)
您可以使用getNetworkCountryIso()
from TelephonyManager
来获取手机当前所在的国家/地区(尽管这显然在CDMA网络上不可靠)。
答案 6 :(得分:13)
以下是基于LocationManager的完整解决方案,以及TelephonyManager和网络提供商位置的后备。我使用@Marco W.的上述答案作为后备部分(很好的答案就是它自己!)。
注意:代码包含PreferencesManager,这是一个帮助类,用于保存和加载SharedPrefrences中的数据。我用它将国家保存到S" P,如果国家是空的,我只能获得该国家。对于我的产品,我并不关心所有边缘情况(用户出国旅行等)。
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答案 7 :(得分:3)
String locale = context.getResources().getConfiguration().locale.getCountry();
已弃用。请改用:
Locale locale;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
locale = context.getResources().getConfiguration().getLocales().get(0);
} else {
locale = context.getResources().getConfiguration().locale;
}
答案 8 :(得分:3)
对于某些设备,如果将默认语言设置为其他语言(印度人可以设置英语(美国)),则
context.getResources().getConfiguration().locale.getDisplayCountry();
将给出错误的值。因此此方法不可靠
此外,TelephonyManager的getNetworkCountryIso()方法在没有SIM卡(WIFI平板电脑)的设备上不起作用。
如果设备没有SIM卡,那么我们可以使用时区获取国家/地区。对于印度这样的国家/地区,这种方法将有效
用于检查国家/地区为印度的示例代码 (时区ID:亚洲/ Calcutta)
private void checkCountry() {
TelephonyManager telMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
if (telMgr == null)
return;
int simState = telMgr.getSimState();
switch (simState) {
//if sim is not available then country is find out using timezone id
case TelephonyManager.SIM_STATE_ABSENT:
TimeZone tz = TimeZone.getDefault();
String timeZoneId = tz.getID();
if (timeZoneId.equalsIgnoreCase(Constants.INDIA_TIME_ZONE_ID)) {
//do something
} else {
//do something
}
break;
//if sim is available then telephony manager network country info is used
case TelephonyManager.SIM_STATE_READY:
TelephonyManager tm = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE);
if (tm != null) {
String countryCodeValue = tm.getNetworkCountryIso();
//check if the network country code is "in"
if (countryCodeValue.equalsIgnoreCase(Constants.NETWORK_INDIA_CODE)) {
//do something
}
else {
//do something
}
}
break;
}
}
答案 9 :(得分:1)
使用具有纬度和经度的GPS,我们可以获得国家代码。
如果我们使用电话,如果我们不使用SIM卡并且在语言环境中,根据语言,它将以错误的方式显示国家/地区代码,则无效。
<强> MainActivity.java:强>
GPSTracker gpsTrack;
public static double latitude = 0;
public static double longitude = 0;
gpsTrack = new GPSTracker(TabHomeActivity.this);
if (gpsTrack.canGetLocation()) {
latitude = gpsParty.getLatitude();
longitude = gpsParty.getLongitude();
Log.e("GPSLat", "" + latitude);
Log.e("GPSLong", "" + longitude);
} else {
gpsTrack.showSettingsAlert();
Log.e("ShowAlert", "ShowAlert");
}
countryCode = getAddress(TabHomeActivity.this, latitude, longitude);
Log.e("countryCode", ""+countryCode);
public String getAddress(Context ctx, double latitude, double longitude) {
String region_code = null;
try {
Geocoder geocoder = new Geocoder(ctx, Locale.getDefault());
List<Address> addresses = geocoder.getFromLocation(latitude, longitude, 1);
if (addresses.size() > 0) {
Address address = addresses.get(0);
region_code = address.getCountryCode();
}
} catch (IOException e) {
Log.e("tag", e.getMessage());
}
return region_code;
}
<强> GPSTracker.java:强>
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.util.Log;
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) {
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS Enabled", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return location;
}
/**
* Stop using GPS listener
* Calling this function will stop using GPS in your app
* */
public void stopUsingGPS(){
if(locationManager != null){
locationManager.removeUpdates(GPSTracker.this);
}
}
/**
* Function to get latitude
* */
public double getLatitude(){
if(location != null){
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
/**
* Function to get longitude
* */
public double getLongitude(){
if(location != null){
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
/**
* Function to check GPS/wifi enabled
* @return boolean
* */
public boolean canGetLocation() {
return this.canGetLocation;
}
public void showSettingsAlert() {
final AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
builder.setMessage("Your GPS seems to be disabled, do you want to enable it?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(@SuppressWarnings("unused") final DialogInterface dialog, @SuppressWarnings("unused") final int id) {
mContext.startActivity(new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS));
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(final DialogInterface dialog, @SuppressWarnings("unused") final int id) {
dialog.cancel();
}
});
final AlertDialog alert = builder.create();
alert.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;
}
}
<强>日志:强>
E / countryCode: IN
修改:使用Fused Location Provider获取纬度和经度更新,以获得更好的结果。
答案 10 :(得分:0)
我使用了GEOIP db并创建了一个函数。您可以直接使用此链接 http://jamhubsoftware.com/geoip/getcountry.php
{"country":["India"],"isoCode":["IN"],"names":[{"de":"Indien","en":"India","es":"India","fr":"Inde","ja":"\u30a4\u30f3\u30c9","pt-BR":"\u00cdndia","ru":"\u0418\u043d\u0434\u0438\u044f","zh-CN":"\u5370\u5ea6"}]}
您可以从https://dev.maxmind.com/geoip/geoip2/geolite2/下载autoload.php和.mmdb文件
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
$ip_address = $_SERVER['REMOTE_ADDR'];
//$ip_address = '3.255.255.255';
require_once 'vendor/autoload.php';
use GeoIp2\Database\Reader;
// This creates the Reader object, which should be reused across
// lookups.
$reader = new Reader('/var/www/html/geoip/GeoLite2-City.mmdb');
// Replace "city" with the appropriate method for your database, e.g.,
// "country".
$record = $reader->city($ip_address);
//print($record->country->isoCode . "\n"); // 'US'
//print($record->country->name . "\n"); // 'United States'
$rows['country'][] = $record->country->name;
$rows['isoCode'][] = $record->country->isoCode;
$rows['names'][] = $record->country->names;
print json_encode($rows);
//print($record->country->names['zh-CN'] . "\n"); // '美国'
//
//print($record->mostSpecificSubdivision->name . "\n"); // 'Minnesota'
//print($record->mostSpecificSubdivision->isoCode . "\n"); // 'MN'
//
//print($record->city->name . "\n"); // 'Minneapolis'
//
//print($record->postal->code . "\n"); // '55455'
//
//print($record->location->latitude . "\n"); // 44.9733
//print($record->location->longitude . "\n"); // -93.2323
?>