[英]How to check if Location Services are enabled?
我正在 Android 操作系統上開發應用程序。 我不知道如何檢查定位服務是否啟用。
我需要一個方法，如果它們被啟用則返回“true”，如果沒有則返回“false”（所以在最后一種情況下我可以顯示一個對話框來啟用它們）。
您可以使用以下代碼來檢查是否啟用了 GPS 提供商和網絡提供商。
LocationManager lm = (LocationManager)context.getSystemService(Context.LOCATION_SERVICE);
boolean gps_enabled = false;
boolean network_enabled = false;
try {
gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
} catch(Exception ex) {}
try {
network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
} catch(Exception ex) {}
if(!gps_enabled && !network_enabled) {
// notify user
new AlertDialog.Builder(context)
.setMessage(R.string.gps_network_not_enabled)
.setPositiveButton(R.string.open_location_settings, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface paramDialogInterface, int paramInt) {
context.startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
}
})
.setNegativeButton(R.string.Cancel,null)
.show();
}
並且在清單文件中，您需要添加以下權限
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
我使用此代碼進行檢查：
public static boolean isLocationEnabled(Context context) {
int locationMode = 0;
String locationProviders;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
try {
locationMode = Settings.Secure.getInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE);
} catch (SettingNotFoundException e) {
e.printStackTrace();
return false;
}
return locationMode != Settings.Secure.LOCATION_MODE_OFF;
}else{
locationProviders = Settings.Secure.getString(context.getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
return !TextUtils.isEmpty(locationProviders);
}
}
就像現在在 2020 年
最新、最好和最短的方法是
@SuppressWarnings("deprecation")
public static Boolean isLocationEnabled(Context context) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
// This is a new method provided in API 28
LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
return lm.isLocationEnabled();
} else {
// This was deprecated in API 28
int mode = Settings.Secure.getInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE,
Settings.Secure.LOCATION_MODE_OFF);
return (mode != Settings.Secure.LOCATION_MODE_OFF);
}
}
遷移到 AndroidX 並使用
implementation 'androidx.appcompat:appcompat:1.3.0'
並使用 LocationManagerCompat
在 Java 中
private boolean isLocationEnabled(Context context) {
LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
return LocationManagerCompat.isLocationEnabled(locationManager);
}
在科特林
private fun isLocationEnabled(context: Context): Boolean {
val locationManager = context.getSystemService(Context.LOCATION_SERVICE) as LocationManager
return LocationManagerCompat.isLocationEnabled(locationManager)
}
您可以使用此代碼將用戶引導至設置，他們可以在其中啟用 GPS：
locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
if( !locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) ) {
new AlertDialog.Builder(context)
.setTitle(R.string.gps_not_found_title) // GPS not found
.setMessage(R.string.gps_not_found_message) // Want to enable?
.setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialogInterface, int i) {
owner.startActivity(new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS));
}
})
.setNegativeButton(R.string.no, null)
.show();
}
解決上面的答案，在 API 23 中，您需要添加“危險”權限檢查以及檢查系統本身：
public static boolean isLocationServicesAvailable(Context context) {
int locationMode = 0;
String locationProviders;
boolean isAvailable = false;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
try {
locationMode = Settings.Secure.getInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE);
} catch (Settings.SettingNotFoundException e) {
e.printStackTrace();
}
isAvailable = (locationMode != Settings.Secure.LOCATION_MODE_OFF);
} else {
locationProviders = Settings.Secure.getString(context.getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
isAvailable = !TextUtils.isEmpty(locationProviders);
}
boolean coarsePermissionCheck = (ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED);
boolean finePermissionCheck = (ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED);
return isAvailable && (coarsePermissionCheck || finePermissionCheck);
}
是的，您可以查看以下代碼：
public boolean isGPSEnabled(Context mContext)
{
LocationManager lm = (LocationManager)
mContext.getSystemService(Context.LOCATION_SERVICE);
return lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
}
具有清單文件中的權限：
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
如果未啟用提供程序，則“被動”是返回的最佳提供程序。 見https://stackoverflow.com/a/4519414/621690
public boolean isLocationServiceEnabled() {
LocationManager lm = (LocationManager)
this.getSystemService(Context.LOCATION_SERVICE);
String provider = lm.getBestProvider(new Criteria(), true);
return (StringUtils.isNotBlank(provider) &&
!LocationManager.PASSIVE_PROVIDER.equals(provider));
}
在我看來，這個 if 子句很容易檢查定位服務是否可用：
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if(!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) && !locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
//All location services are disabled
}
要在 android 谷歌地圖中獲取當前地理位置，您應該打開您的設備位置選項。要檢查位置是否打開，您可以簡單地從您的onCreate()方法調用此方法。
private void checkGPSStatus() {
LocationManager locationManager = null;
boolean gps_enabled = false;
boolean network_enabled = false;
if ( locationManager == null ) {
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
}
try {
gps_enabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
} catch (Exception ex){}
try {
network_enabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
} catch (Exception ex){}
if ( !gps_enabled && !network_enabled ){
AlertDialog.Builder dialog = new AlertDialog.Builder(MyActivity.this);
dialog.setMessage("GPS not enabled");
dialog.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//this will navigate user to the device location settings screen
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
});
AlertDialog alert = dialog.create();
alert.show();
}
}
我將這種方式用於NETWORK_PROVIDER但您可以添加 和 用於GPS 。
LocationManager locationManager;
在onCreate我把
isLocationEnabled();
if(!isLocationEnabled()) {
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle(R.string.network_not_enabled)
.setMessage(R.string.open_location_settings)
.setPositiveButton(R.string.yes,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
}
})
.setNegativeButton(R.string.cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
和檢查方法
protected boolean isLocationEnabled(){
String le = Context.LOCATION_SERVICE;
locationManager = (LocationManager) getSystemService(le);
if(!locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)){
return false;
} else {
return true;
}
}
正如彼得·麥克萊南（Peter McClennan）所指出的，谷歌有一個API與新的融合位置提供程序非常兼容。 Github的Google示例代碼中提供了一個完整的示例，您無需編寫用戶對話框來要求他們更改設置，因為它是由API自動完成的。
這是一個非常有用的方法，如果啟用了Location services ，它會返回“ true ”：
public static boolean locationServicesEnabled(Context context) {
LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
boolean gps_enabled = false;
boolean net_enabled = false;
try {
gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
} catch (Exception ex) {
Log.e(TAG,"Exception gps_enabled");
}
try {
net_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
} catch (Exception ex) {
Log.e(TAG,"Exception network_enabled");
}
return gps_enabled || net_enabled;
}
對於科特林
private fun isLocationEnabled(mContext: Context): Boolean {
val lm = mContext.getSystemService(Context.LOCATION_SERVICE) as LocationManager
return lm.isProviderEnabled(LocationManager.GPS_PROVIDER) || lm.isProviderEnabled(
LocationManager.NETWORK_PROVIDER)
}
對話
private fun showLocationIsDisabledAlert() {
alert("We can't show your position because you generally disabled the location service for your device.") {
yesButton {
}
neutralPressed("Settings") {
startActivity(Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS))
}
}.show()
}
像這樣打電話
if (!isLocationEnabled(this.context)) {
showLocationIsDisabledAlert()
}
提示：對話框需要以下導入（android studio 應該為您處理）
import org.jetbrains.anko.alert
import org.jetbrains.anko.noButton
在清單中，您需要以下權限
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
我使用第一個代碼開始創建方法 isLocationEnabled
private LocationManager locationManager ;
protected boolean isLocationEnabled(){
String le = Context.LOCATION_SERVICE;
locationManager = (LocationManager) getSystemService(le);
if(!locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)){
return false;
} else {
return true;
}
}
我檢查條件是否打開地圖並錯誤給出意圖 ACTION_LOCATION_SOURCE_SETTINGS
if (isLocationEnabled()) {
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
locationClient = getFusedLocationProviderClient(this);
locationClient.getLastLocation()
.addOnSuccessListener(new OnSuccessListener<Location>() {
@Override
public void onSuccess(Location location) {
// GPS location can be null if GPS is switched off
if (location != null) {
onLocationChanged(location);
Log.e("location", String.valueOf(location.getLongitude()));
}
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Log.e("MapDemoActivity", e.toString());
e.printStackTrace();
}
});
startLocationUpdates();
}
else {
new AlertDialog.Builder(this)
.setTitle("Please activate location")
.setMessage("Click ok to goto settings else exit.")
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
})
.setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
System.exit(0);
}
})
.show();
}
private boolean isGpsEnabled()
{
LocationManager service = (LocationManager) getSystemService(LOCATION_SERVICE);
return service.isProviderEnabled(LocationManager.GPS_PROVIDER)&&service.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
}
您可以請求位置更新並一起顯示對話框，就像 GoogleMaps doas 一樣。 這是代碼：
googleApiClient = new GoogleApiClient.Builder(getActivity())
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this).build();
googleApiClient.connect();
LocationRequest locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationRequest.setInterval(30 * 1000);
locationRequest.setFastestInterval(5 * 1000);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(locationRequest);
builder.setAlwaysShow(true); //this is the key ingredient
PendingResult<LocationSettingsResult> result = LocationServices.SettingsApi.checkLocationSettings(googleApiClient, builder.build());
result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
@Override
public void onResult(LocationSettingsResult result) {
final Status status = result.getStatus();
final LocationSettingsStates state = result.getLocationSettingsStates();
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS:
// All location settings are satisfied. The client can initialize location
// requests here.
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
// Location settings are not satisfied. But could be fixed by showing the user
// a dialog.
try {
// Show the dialog by calling startResolutionForResult(),
// and check the result in onActivityResult().
status.startResolutionForResult(getActivity(), 1000);
} catch (IntentSender.SendIntentException ignored) {}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
// Location settings are not satisfied. However, we have no way to fix the
// settings so we won't show the dialog.
break;
}
}
});
}
如果您需要更多信息，請查看LocationRequest類。
可以用最簡單的方式做
private boolean isLocationEnabled(Context context){
int mode =Settings.Secure.getInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE,
Settings.Secure.LOCATION_MODE_OFF);
final boolean enabled = (mode != android.provider.Settings.Secure.LOCATION_MODE_OFF);
return enabled;
}
如果您使用的是 AndroidX，請使用以下代碼檢查位置服務是否啟用：
fun isNetworkServiceEnabled(context: Context) = LocationManagerCompat.isLocationEnabled(context.getSystemService(LocationManager::class.java))
public class LocationUtil {
private static final String TAG = LocationUtil.class.getSimpleName();
public static LocationManager getLocationManager(final Context context) {
return (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
}
public static boolean isNetworkProviderEnabled(final Context context) {
return getLocationManager(context).isProviderEnabled(LocationManager.NETWORK_PROVIDER);
}
public static boolean isGpsProviderEnabled(final Context context) {
return getLocationManager(context).isProviderEnabled(LocationManager.GPS_PROVIDER);
}
// Returns true even if the location services are disabled. Do not use this method to detect location services are enabled.
private static boolean isPassiveProviderEnabled(final Context context) {
return getLocationManager(context).isProviderEnabled(LocationManager.PASSIVE_PROVIDER);
}
public static boolean isLocationModeOn(final Context context) throws Exception {
int locationMode = Settings.Secure.getInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE);
return locationMode != Settings.Secure.LOCATION_MODE_OFF;
}
public static boolean isLocationEnabled(final Context context) {
try {
return isNetworkProviderEnabled(context) || isGpsProviderEnabled(context) || isLocationModeOn(context);
} catch (Exception e) {
Log.e(TAG, "[isLocationEnabled] error:", e);
}
return false;
}
public static void gotoLocationSettings(final Activity activity, final int requestCode) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
activity.startActivityForResult(intent, requestCode);
}
public static String getEnabledProvidersLogMessage(final Context context){
try{
return "[getEnabledProvidersLogMessage] isNetworkProviderEnabled:"+isNetworkProviderEnabled(context) +
", isGpsProviderEnabled:" + isGpsProviderEnabled(context) +
", isLocationModeOn:" + isLocationModeOn(context) +
", isPassiveProviderEnabled(ignored):" + isPassiveProviderEnabled(context);
}catch (Exception e){
Log.e(TAG, "[getEnabledProvidersLogMessage] error:", e);
return "provider error";
}
}
}
使用 isLocationEnabled 方法來檢測位置服務是否已啟用。
https://github.com/Polidea/RxAndroidBle/issues/327#頁面將提供更多信息，為什么不使用被動提供程序，而是使用位置模式。
在 Android 8.1 或更低版本上，用戶可以從
Settings > Location > Mode > Battery Saving 。
此模式僅使用WiFi, Bluetooth or mobile data而不是 GPS 來確定用戶位置。
這就是為什么您必須檢查網絡提供商是否已啟用並且locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)是不夠的。
如果您使用的是androidx此代碼將檢查您正在運行的 SDK 版本並調用相應的提供程序：
public boolean isLocationEnabled(Context context) {
LocationManager manager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
return manager != null ? LocationManagerCompat.isLocationEnabled(manager) : false;
}
要檢查網絡提供商，如果您檢查 GPS 提供商和網絡提供商的返回值，您只需要將傳遞給 isProviderEnabled 的字符串更改為 LocationManager.NETWORK_PROVIDER - 兩者都為 false 表示沒有位置服務
我只是使用FusedLocationProviderClient 。
implementation 'com.google.android.gms:play-services-location:$gms_version'
val locationClient = LocationServices.getFusedLocationProviderClient(requireContext())
val isLocationAvailable = locationClient.locationAvailability.isSuccessful
LocationManager lm = (LocationManager)this.getSystemService(Context.LOCATION_SERVICE);
boolean gps_enabled = false;
boolean network_enabled = false;
try {
gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
} catch(Exception e){
e.printStackTrace();
}
try {
network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
} catch(Exception e){
e.printStackTrace();
}
if(!gps_enabled && !network_enabled) {
// notify user
new AlertDialog.Builder(this)
.setMessage("Please turn on Location to continue")
.setPositiveButton("Open Location Settings", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface paramDialogInterface, int paramInt) {
startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
}
}).
setNegativeButton("Cancel",null)
.show();
}
You can also use extension function.
------------------------------------
fun Context.isLocationEnabled(): Boolean{
val locationManager = getSystemService(Context.LOCATION_SERVICE) as LocationManager
return LocationManagerCompat.isLocationEnabled(locationManager)}
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