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Android 13 Scan issue

See original GitHub issue

After install Android 13, SDK 33, There is no results in DeveceDiscovered.

I`m sure device is available for scaning and it near me. I can see it from phone bluetooth settings/ Device is ble. Bluetooth is On and permissions are done in manifest and runtime. Bluetooth.Scan/advertize/admin/previleged/connect.Location permissions, nearby devices/hardware.bluetooth_le etc.

Anybody implement it on Android 13? Where can be a problem

Issue Analytics

State:
Created 8 months ago
Comments:9 (2 by maintainers)

Top GitHub Comments

1reaction

88soulscommented, Mar 16, 2023

Manifest: android:minSdkVersion=“28” android:targetSdkVersion=“33” android.permission.ACCESS_NETWORK_STATE" android.permission.INTERNET" android.permission.BLUETOOTH" android:maxSdkVersion=“30” android.permission.BLUETOOTH_ADMIN" android:maxSdkVersion=“30” android.permission.BLUETOOTH_PRIVILEGED" android.permission.BLUETOOTH_CONNECT" android.permission.BLUETOOTH_ADVERTISE" android.permission.BLUETOOTH_SCAN" android:usesPermissionFlags=“neverForLocation” android.permission.ACCESS_COARSE_LOCATION" android.permission.ACCESS_FINE_LOCATION" uses-feature android:name=“android.hardware.bluetooth” android:required=“true” uses-feature android:name=“android.hardware.bluetooth_le” android:required=“true” uses-feature android:name=“android.software.companion_device_setup” uses-feature android:name=“android.hardware.location” android:required=“false”

0reactions

88soulscommented, Mar 16, 2023

So i fix this in my code, here is some things i did:

Manifest: <uses-permission android:name="android.permission.BLUETOOTH" android:maxSdkVersion="30" /> <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" android:maxSdkVersion="30" /> <uses-permission android:name="android.permission.BLUETOOTH_PRIVILEGED" /> <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" /> <uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" /> <uses-permission android:name="android.permission.BLUETOOTH_SCAN" android:usesPermissionFlags="neverForLocation" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-feature android:name="android.hardware.bluetooth" android:required="true" /> <uses-feature android:name="android.hardware.bluetooth_le" android:required="true" /> <uses-feature android:name="android.software.companion_device_setup" /> <uses-feature android:name="android.hardware.location" android:required="false" />
Additionaly there is permission called in phone “NEARBY DEVICES”. You should ask user in runtime from ANDROID project, I ask from additional service. Permissions namespace Xamarin.Essensials (From core I use Plugin.Permissions and its ok):

public async Task<PermissionStatus> CheckAndRequestBluetoothPermissions() { PermissionStatus status; if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.S) { status = await Permissions.CheckStatusAsync<BluetoothSPermission>();

            if (status == PermissionStatus.Granted)
                return status;
            AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this._activity);
            alertDialogBuilder.SetTitle(Localization["Permission required"]);
            
            alertDialogBuilder.SetIcon(Resource.Drawable.ic_alert);
            alertDialogBuilder.SetMessage(Localization["BluetoothPermissions"]);
            alertDialogBuilder.SetCancelable(false);
            alertDialogBuilder.SetPositiveButton(Localization["Ok"], async (senderAlert, args) =>
            {
                status = await Permissions.RequestAsync<BluetoothSPermission>();
                alertDialogBuilder.Dispose();
            });
            alertDialogBuilder.SetNegativeButton(Localization["Cancel"], async (senderAlert, args) =>
            {
                alertDialogBuilder.Dispose();
            });

            Dialog diag = alertDialogBuilder.Create();
            
            diag.Show();
            
        }
        else
        {
            status = await Permissions.CheckStatusAsync<Permissions.LocationWhenInUse>();

            if (status == PermissionStatus.Granted)
                return status;

            InvokeOnMainThread(() =>
            {
                AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this._activity);
                alertDialogBuilder.SetTitle(Localization["Permission required"]);
                alertDialogBuilder.SetIcon(Resource.Drawable.ic_alert);
                alertDialogBuilder.SetMessage(Localization["LocationWhenInUse"]);
                alertDialogBuilder.SetCancelable(false);
                alertDialogBuilder.SetPositiveButton(Localization["Ok"], async (senderAlert, args) =>
                {
                    status = await Permissions.RequestAsync<Permissions.LocationWhenInUse>();
                    alertDialogBuilder.Dispose();
                });
                alertDialogBuilder.SetNegativeButton(Localization["Cancel"], async (senderAlert, args) =>
                {
                    alertDialogBuilder.Dispose();
                });
                Dialog diag = alertDialogBuilder.Create();
                diag.Show();
            });
        }
        return status;

After all this things, it starts work. Note if you dont have exeptions, but DeviceDiscovered() and DeviceAdvertised() not starts, its permissions issue. I hope you will be OK with this