I am working on a file sharing app. I need to turn on local only hotspot of a device programmatically by calling WifiManager.startLocalOnlyHotspot().
According to the android docs on this page - https://developer.android.com/reference/android/net/wifi/WifiManager#startLocalOnlyHotspot(android.net.wifi.WifiManager.LocalOnlyHotspotCallback,%2520android.os.Handler),
Applications need to have the following permissions to start LocalOnlyHotspot: Manifest.permission.CHANGE_WIFI_STATE and ACCESS_FINE_LOCATION. Callers without the permissions will trigger a SecurityException.
I have added both these permissions in my manifest and also granted ACCESS_FINE_LOCATION at runtime (coz it's a runtime permission (dangerous permission)).
But calling startLocalOnlyHotspot() still throws SecurityException in some devices.
Device in which SecurityException is thrown: Samsung Galaxy J7 Max (j7maxlte), Android 8.1
Device in which it works fine without throwing an exception: Redmi Note 7 Pro, Android 9 PKQ1.181203.001
What am I missing?
You need to enable location using GPS.
First of all, add the dependency for gms.
implementation 'com.google.android.gms:play-services-location:16.0.0'
After that, set up Location Services
private void setupLocationServices() {
LocationRequest mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(10);
mLocationRequest.setSmallestDisplacement(10);
mLocationRequest.setFastestInterval(10);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
LocationSettingsRequest.Builder builder = new
LocationSettingsRequest.Builder();
builder.addLocationRequest(mLocationRequest);
task = LocationServices.getSettingsClient(this).checkLocationSettings(builder.build());
locationSettingsResponseBuilder();
}
LocationSettingsResponseBuilder:
private void locationSettingsResponseBuilder() {
task.addOnCompleteListener(task -> {
try {
LocationSettingsResponse response = task.getResult(ApiException.class);
// All location settings are satisfied. The client can initialize location
// requests here.
//Everything is good. You can turn on hotspot here.
//}
} catch (ApiException exception) {
switch (exception.getStatusCode()) {
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
// Location settings are not satisfied. But could be fixed by showing the
// user a dialog.
try {
// Cast to a resolvable exception.
ResolvableApiException resolvable = (ResolvableApiException) exception;
// Show the dialog by calling startResolutionForResult(),
// and check the result in onActivityResult().
resolvable.startResolutionForResult(
MainActivity.this,
101);
} catch (IntentSender.SendIntentException e) {
// Ignore the error.
} catch (ClassCastException e) {
// Ignore, should be an impossible error.
}
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;
}
}
});
}
Add this case to the onActivityResult method.
case 101:
final LocationSettingsStates states = LocationSettingsStates.fromIntent(data);
switch (resultCode) {
case Activity.RESULT_OK:
// All required changes were successfully made
Log.v("case 101", states.isLocationPresent() + "");
//Everything is good. You can turn on hotspot here.
break;
case Activity.RESULT_CANCELED:
// The user was asked to change settings, but chose not to
Log.v("case 101", "Canceled");
break;
default:
break;
}
break;
I recently created a demo app called Spotserve. That turns on wifi hotspot for all devices with API>=15 and hosts a demo server on that hotspot. You can check that for more details. Hope this helps!
