public void startAdvertising() {
System.out.println("Start advertising");
if (ContextCompat.checkSelfPermission(activity, Manifest.permission.BLUETOOTH_ADMIN)
!= PackageManager.PERMISSION_GRANTED) {
System.out.println(" doesn't have permission");
} else {
System.out.println(" has permission");
advertiser = bluetoothAdapter.getBluetoothLeAdvertiser();
AdvertiseSettings.Builder settings = new AdvertiseSettings.Builder();
settings.setConnectable(true);
settings.setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_LOW_LATENCY);
settings.setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_HIGH);
settings.setTimeout(120000);
AdvertiseData.Builder data = new AdvertiseData.Builder();
data.addServiceUuid(new ParcelUuid(UUID.fromString(B4UUID)));
data.addServiceData(
new ParcelUuid(UUID.fromString(B4UUID)), "a".getBytes(Charset.forName("UTF-8")));
data.setIncludeDeviceName(true);
advertiseCallback = new AdvertiseBack();
advertiser.startAdvertising(settings.build(), data.build(), advertiseCallback);
isAdvertising = true;
}
}
