我正在Android操作系统上开发应用程序。我不知道如何检查位置服务是否已启用。
我需要一个方法,如果启用它们,则返回“ true”,否则未返回“ false”(因此,在最后一种情况下,我可以显示一个对话框来启用它们)。
我正在Android操作系统上开发应用程序。我不知道如何检查位置服务是否已启用。
我需要一个方法,如果启用它们,则返回“ true”,否则未返回“ false”(因此,在最后一种情况下,我可以显示一个对话框来启用它们)。
Answers:
您可以使用以下代码检查是否启用了gps提供程序和网络提供程序。
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();
}
在清单文件中,您需要添加以下权限
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
lm.getAllProviders().contains(LocationManager.GPS_PROVIDER)
或NETWORK_PROVIDER
)将确保您不要将用户扔到没有网络选项的设置页面。
Settings.ACTION_SECURITY_SETTINGS
应该是Settings.ACTION_LOCATION_SOURCE_SETTINGS
我使用以下代码进行检查:
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);
}
}
就像现在的2020年
最新,最好和最短的方法是
public static Boolean isLocationEnabled(Context context)
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
// This is new method provided in API 28
LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
return lm.isLocationEnabled();
} else {
// This is 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);
}
}
LocationManager.class
的getSystemService
方法,因为调用需要API 23 ;-)
您可以使用以下代码将用户定向到“设置”,他们可以在其中启用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();
}
isProviderEnabled()
和getProviders(true)
方法。
isProviderEnabled()
和getProviders(true)
方法响应时启用这样的设置(或禁用,这取决于你如何看待它),我会大为好奇,想知道你遇到了什么。
迁移到Android X并使用
implementation 'androidx.appcompat:appcompat:1.1.0'
并使用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)
}
Before API version LOLLIPOP [API Level 21], this method would throw SecurityException if the location permissions were not sufficient to use the specified provider.
因此,如果您没有网络或gps提供程序的权限,则它可能会引发异常,具体取决于启用了哪个功能。查看源代码以获取更多信息。
解决以上问题的答案,在API 23中,您需要添加“危险”权限检查以及检查系统本身:
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);
}
如果未启用任何提供程序,则“被动”是返回的最佳提供程序。参见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));
}
是的,您可以检查以下代码:
public boolean isGPSEnabled(Context mContext)
{
LocationManager lm = (LocationManager)
mContext.getSystemService(Context.LOCATION_SERVICE);
return lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
}
清单文件中的权限:
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
我认为,此if子句可以轻松检查位置服务是否可用:
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if(!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) && !locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
//All location services are disabled
}
我对NETWORK_PROVIDER使用了这种方法,但是您可以为GPS添加和。
LocationManager locationManager;
在onCreate中,我将
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();
}
和检查方法
protected boolean isLocationEnabled(){
String le = Context.LOCATION_SERVICE;
locationManager = (LocationManager) getSystemService(le);
if(!locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)){
return false;
} else {
return true;
}
}
locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
这是一个非常有用的方法,true
如果Location services
启用,它会返回“ ” :
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;
}
要在android谷歌地图中获取当前地理位置,您应该打开设备位置选项。要检查该位置是否开启,您可以从onCreate()
方法中简单地调用此方法。
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();
}
}
对于科特林
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)
}
对话
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()
}
这样叫
if (!isLocationEnabled(this.context)) {
showLocationIsDisabledAlert()
}
提示:对话框需要以下导入(android studio应该为您处理)
import org.jetbrains.anko.alert
import org.jetbrains.anko.noButton
在清单中,您需要以下权限
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
您可以请求位置更新并一起显示对话框,例如GoogleMaps doas。这是代码:
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,请检查LocationRequest类。
我使用第一个代码开始创建方法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;
}
}
我检查条件是否成功打开地图,然后给与错误的意图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();
}
可以用最简单的方式做
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,请使用以下代码检查位置服务是否已启用:
fun isNetworkServiceEnabled(context: Context) = LocationManagerCompat.isLocationEnabled(context.getSystemService(LocationManager::class.java))
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();
}
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方法检测启用的位置服务。
https://github.com/Polidea/RxAndroidBle/issues/327#页面将提供更多信息,为什么不使用被动提供程序,而是使用位置模式。