/// <summary>
/// Ativa o bluetooth
/// </summary>
/// <param name="enable">Ativar (true) | Desativar (false)</param>
/// <returns></returns>
public static bool TurnOnBluetooth(bool enable)
{
try
{
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.DefaultAdapter;
if (bluetoothAdapter == null)
{
return(false);
}
if (enable && !bluetoothAdapter.IsEnabled)
{
return(bluetoothAdapter.Enable());
}
else if (!enable && bluetoothAdapter.IsEnabled)
{
return(bluetoothAdapter.Disable());
}
return(true);
}
catch
{
return(false);
}
}
public void DisableBluetooth()
{
if (_btAdapter.IsEnabled)
{
_btAdapter.Disable();
}
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Connection);
btnstart = FindViewById <Button>(Resource.Id.startButton);
btnstart.Click += Btnstart_Click;
btnstop = FindViewById <Button>(Resource.Id.stopButton);
btnstop.Click += Btnstop_Click;
//Debug
txtDebug = FindViewById <TextView>(Resource.Id.debugLog);
Button backToMain = FindViewById <Button>(Resource.Id.backToMainFromConnection);
backToMain.Click += (sender, e) =>
{
try {
BluetoothAdapter defaultAdapter = BluetoothAdapter.DefaultAdapter;
if (defaultAdapter.IsEnabled)
{
defaultAdapter.Disable();
}
var intent = new Intent(this, typeof(MainActivity));
StartActivity(intent);
} catch (Exception exc)
{
Console.WriteLine(exc);
}
};
}
private void Button_BT_TurnOff(object sender, EventArgs e)
{
if (_manager.IsEnabled)
{
_manager.Disable();
}
}
public override void OnBackPressed()
{
base.OnBackPressed();
if (!_wasBluetoothEnabled)
{
_bluetoothAdapter.Disable();
}
}
private void Btnstop_Click(object sender, EventArgs e)
{
BluetoothAdapter defaultAdapter = BluetoothAdapter.DefaultAdapter;
if (defaultAdapter.IsEnabled)
{
defaultAdapter.Disable();
}
}
public int DisableBluetooth()
{
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.DefaultAdapter;
if (mBluetoothAdapter.IsEnabled)
{
mBluetoothAdapter.Disable();
}
return(1);
}
//returns the current state of the Bluetooth adapter
public bool TurnOff()
{
BluetoothAdapter b = BluetoothAdapter.DefaultAdapter;
if (!b.IsEnabled)
{
return(false); //Bluetooth was off
}
b.Disable();
return(true);
}
public void Disconnect()
{
BluetoothAdapter defaultAdapter = BluetoothAdapter.DefaultAdapter;
if (defaultAdapter.IsEnabled)
{
ProgressAction("Bluetooth disconnecting");
defaultAdapter.Disable();
ProgressAction("Bluetooth disconnected");
}
}
public void OnClick(View v)
{
switch (v.Id)
{
case Resource.Id.onB:
if (!blue.Enable())
{
Intent o = new Intent(BluetoothAdapter.ActionRequestEnable);
StartActivityForResult(o, 0);
}
Toast.MakeText(this, "Enable", ToastLength.Short).Show();
break;
case Resource.Id.offB:
if (blue.Enable())
{
blue.Disable();
Toast.MakeText(this, "Bluetooth Disable", ToastLength.Short).Show();
}
break;
// case Resource.Id.visibleD:
// Intent visible = new Intent(BluetoothAdapter.ActionsRequestDiscoverable)'
// StartActivityForResult(visible, 0);
//break;
case Resource.Id.pairD:
ArrayList list = new ArrayList();
foreach (BluetoothDevice bt in blue.BondedDevices)
{
list.Add(bt.Name);
}
ArrayAdapter adapter = new ArrayAdapter(this, Android.Resource.Layout.SimpleListItem1, list);
list_Of_Devices.SetAdapter(adapter);
break;
//case Resource.Id.nameBtn:
// if (!bluetoothName.Text.ToString().Equals(""))
// {
// String n = bluetoothName.Text.Tostring();
// blue.SetName(n);
// }
// else
// {
// Toast.MakeText(this, "Please enter name", ToastLength.Short).Show();
// }
// break;
case Resource.Id.showName:
Toast.MakeText(this, blue.Name.ToString(), ToastLength.Short).Show();
break;
}
}
public async void DoTurnOff()
{
if (_btAdapter.IsEnabled || _btSocket.IsConnected)
{
await DoCloseDispose(_btAdapter);
await DoCloseDispose(_btSocket);
_btAdapter.Disable();
_btSocket.Close();
await _page.DisplayAlert("Action", "Socket and Bluetooth turned Off", "OK");
}
}
public void Cancel()
{
try
{
mSocket.Close();
btAdapter.Disable();
//streamList.Clear();
//deviceList.Clear();
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("Could not close the connect socket", ex);
}
}
public void TrySetBleEnabled(bool enabled)
{
if (bluetoothAdapter.IsEnabled != enabled)
{
if (enabled == false)
{
bluetoothAdapter.Disable();
}
else
{
bluetoothAdapter.Enable();
}
}
}
private void _bTSwitch_CheckedChange(object sender, CompoundButton.CheckedChangeEventArgs e)
{
if (e.IsChecked)
{
if (!_bluetoothAdapter.IsEnabled)
{
_bluetoothAdapter.Enable();
}
}
else
{
StopSearch();
_bluetoothAdapter.Disable();
AccessReadBtn.Enabled = false;
}
}
private void SetMode(RadioMode value)
{
switch (value)
{
case RadioMode.PowerOff:
_adapter.Disable();
break;
default:
// TODO: Determine if setting ScanMode is possible
if (!_adapter.IsEnabled)
{
_adapter.Enable();
}
break;
}
}
private void TurnOffBluetooth()
{
btSwitch.Text = "Turn Bluetooth On";
if (btAdapter == null)
{
// message tayo dito device doesn't support bluetooth
Logger.Log("Device doesn't support Bluetooth");
return;
}
// enabled, so we turn it off
if (btAdapter.IsEnabled)
{
btAdapter.Disable();
Intent enableIntent = new Intent(BluetoothAdapter.ActionRequestEnable);
StartActivityForResult(enableIntent, REQUEST_ENABLE_BT);
}
}
protected override void OnCreate(Bundle savedInstanceState)
{
TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;
base.OnCreate(savedInstanceState);
Xamarin.Essentials.Platform.Init(this, savedInstanceState);
global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
LoadApplication(new App());
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.DefaultAdapter;
if (bluetoothAdapter.IsEnabled == false)
{
bluetoothAdapter.Enable();
}
else
{
bluetoothAdapter.Disable();
}
}
// @see https://stackoverflow.com/a/43754366/11615696
public bool enableBluetooth(bool flag)
{
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.DefaultAdapter;
var enabled = bluetoothAdapter.IsEnabled;
if (flag == enabled)
{
logger.debug($"enableBluetooth: naught to do! ({flag})");
return(true);
}
logger.debug($"enableBluetooth: setting {flag}");
if (flag)
{
bluetoothAdapter.Enable();
}
else
{
bluetoothAdapter.Disable();
}
return(true);
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.DefaultAdapter;
if (mBluetoothAdapter == null)
{
// Device does not support Bluetooth
}
if (!mBluetoothAdapter.IsEnabled)
{
Intent enableBtIntent = new Intent(BluetoothAdapter.ActionRequestEnable);
int REQUEST_ENABLE_BT = 0;
StartActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
// Register for broadcasts when a device is discovered
receiver = new Receiver(this);
var filter = new IntentFilter(BluetoothDevice.ActionFound);
RegisterReceiver(receiver, filter);
// Register for broadcasts when discovery has finished
filter = new IntentFilter(BluetoothAdapter.ActionDiscoveryFinished);
RegisterReceiver(receiver, filter);
// Register for broadcasts when a device tries to pair
filter = new IntentFilter(BluetoothDevice.ActionPairingRequest);
RegisterReceiver(receiver, filter);
// Get the local Bluetooth adapter
btAdapter = BluetoothAdapter.DefaultAdapter;
var scanButton = FindViewById <Button>(Resource.Id.button1);
scanButton.Click += (sender, e) =>
{
char[] blank = new char[1];
FindViewById <TextView>(Resource.Id.textView2).SetText(blank, 0, 0);
receiver.HC05Found = false;
DoDiscovery();
};
var aboutButton = FindViewById <Button>(Resource.Id.button2);
aboutButton.Click += (sender, e) =>
{
About(this);
};
var closeButton = FindViewById <Button>(Resource.Id.button3);
closeButton.Click += (sender, e) =>
{
mBluetoothAdapter.Disable();
this.FinishAffinity();
};
}
public override bool DisableBluetooth(bool reenable, bool lowEnergy = true, string rationale = null)
{
base.DisableBluetooth(reenable, lowEnergy, rationale);
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.DefaultAdapter;
// check whether bluetooth is enabled
if (bluetoothAdapter?.IsEnabled ?? false)
{
ManualResetEvent disableWait = new ManualResetEvent(false);
ManualResetEvent enableWait = new ManualResetEvent(false);
EventHandler <global::Android.Bluetooth.State> StateChangedHandler = (sender, newState) =>
{
if (newState == global::Android.Bluetooth.State.Off)
{
disableWait.Set();
}
else if (newState == global::Android.Bluetooth.State.On)
{
enableWait.Set();
}
};
AndroidBluetoothBroadcastReceiver.STATE_CHANGED += StateChangedHandler;
try
{
if (!bluetoothAdapter.Disable())
{
disableWait.Set();
}
}
catch (Exception)
{
disableWait.Set();
}
disableWait.WaitOne(5000);
if (reenable)
{
try
{
if (!bluetoothAdapter.Enable())
{
enableWait.Set();
}
}
catch (Exception)
{
enableWait.Set();
}
enableWait.WaitOne(5000);
}
AndroidBluetoothBroadcastReceiver.STATE_CHANGED -= StateChangedHandler;
}
bool isEnabled = bluetoothAdapter?.IsEnabled ?? false;
// dispatch an intent to reenable bluetooth, which will require user interaction.
if (reenable && !isEnabled)
{
return(EnableBluetooth(lowEnergy, rationale));
}
else
{
return(isEnabled);
}
}
public static void Disable()
{
adapter.Disable();
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
Xamarin.Essentials.Platform.Init(this, savedInstanceState);
SetContentView(Resource.Layout.activity_main);
mStatusTv = (TextView)FindViewById(Resource.Id.tv_status);
mActivateBtn = (Button)FindViewById(Resource.Id.btn_enable);
mPairedBtn = (Button)FindViewById(Resource.Id.btn_view_paired);
mScanBtn = (Button)FindViewById(Resource.Id.btn_scan);
mBluetoothAdapter = BluetoothAdapter.DefaultAdapter;
mProgressDlg = new ProgressDialog(this);
mProgressDlg.SetMessage("Scanning...");
mProgressDlg.SetCancelable(false);
IntentFilter filter = new IntentFilter();
filter.AddAction(BluetoothAdapter.ActionStateChanged);
filter.AddAction(BluetoothDevice.ActionFound);
filter.AddAction(BluetoothAdapter.ActionDiscoveryStarted);
filter.AddAction(BluetoothAdapter.ActionDiscoveryFinished);
broadcastReceiver = new BluetoothBroadcastReceiver(() =>
{
showToast("Enabled");
showEnabled();
}, () => { mProgressDlg.Show(); }, mDeviceList);
RegisterReceiver(broadcastReceiver, filter);
if (mBluetoothAdapter == null)
{
showUnsupported();
}
else
{
mPairedBtn.Click += (sender, e) =>
{
var pairedDevices = mBluetoothAdapter.BondedDevices;
if (pairedDevices == null || pairedDevices.Count == 0)
{
showToast("No Paired Devices Found");
}
else
{
IList <IParcelable> list = new List <IParcelable>();
foreach (var device in pairedDevices)
{
list.Add(device);
}
Intent intent = new Intent(this, typeof(DeviceListActivity));
intent.PutParcelableArrayListExtra("device.list", list);
StartActivity(intent);
}
};
mScanBtn.Click += (sender, e) =>
{
if (mBluetoothAdapter.IsDiscovering)
{
// cancel the discovery if it has already started
mBluetoothAdapter.CancelDiscovery();
}
if (mBluetoothAdapter.StartDiscovery())
{
// bluetooth has started discovery
}
};
mActivateBtn.Click += (sender, e) =>
{
if (mBluetoothAdapter.IsEnabled)
{
mBluetoothAdapter.Disable();
showDisabled();
}
else
{
Intent intent = new Intent(BluetoothAdapter.ActionRequestEnable);
StartActivityForResult(intent, 1000);
}
};
if (mBluetoothAdapter.IsEnabled)
{
showEnabled();
}
else
{
showDisabled();
}
}
}
private async void Request_AccessAsync(object sender, EventArgs e)
{
byte[] buffer = new byte[256];
MySqlConnection myConn = new MySqlConnection(Resources.GetString(Resource.String.myConnectionString));
if (myConn.State == System.Data.ConnectionState.Closed)
{
myConn.Open(); // connection timeout is set to 60 ,check strings.xml
}
string access_code = Login.GetPass(); //storing password in order to check the access code with arduino
string numberCar = Login.GetNumberCar(); // this will be set if the user has a car
//check if bluetooth is on
if (!(adapter.IsEnabled))
{
Console.WriteLine("Enabling bluetooth");
Toast.MakeText(ApplicationContext, "Enabling bluetooth first", ToastLength.Long).Show();
adapter.Enable();
Thread.Sleep(2000); // if bluetooth is not up
}
// this will connect to bluetooth
if (adapter == null)
{
throw new Exception("No bluetooth adapter found.");
}
if (!adapter.IsEnabled)
{
throw new Exception("Bluetooth adapter is not enabled");
}
BluetoothDevice device = (from bd in this.adapter.BondedDevices
where bd.Name == "HC-05"
select bd).FirstOrDefault();
Console.WriteLine("\n\n" + device.Name);
if (device == null)
{
throw new Exception("Named device not found.");
}
_socket = CreateRfcommSocket(device); // used another function for creating the socket
Console.WriteLine(device.GetUuids().ToString());
string InsertSql = "Update Angajat_Intrare SET Marca=@marca, Nume=@nume, Prenume=@prenume, Poza=@poza, Divizia=@divizie";
MySqlCommand cmdInsert = new MySqlCommand(InsertSql, myConn);
cmdInsert.Parameters.AddWithValue("@marca", Login.GetUser());
cmdInsert.Parameters.AddWithValue("@nume", Login.GetNume());
cmdInsert.Parameters.AddWithValue("@prenume", Login.GetPrenume());
cmdInsert.Parameters.AddWithValue("@poza", null);
cmdInsert.Parameters.AddWithValue("@divizie", Login.GetDivizie());
cmdInsert.ExecuteNonQuery();
cmdInsert.Dispose();
try
{
await _socket.ConnectAsync();
Toast.MakeText(ApplicationContext, "Connected with bluetooth", ToastLength.Short).Show();
// Write data to the device
await _socket.OutputStream.WriteAsync(Encoding.ASCII.GetBytes(access_code)); //send Marca
Console.WriteLine("Access code sent...");
//var receivedString = Encoding.UTF8.GetString(buffer); //convert the bytes received to string
//Console.WriteLine($"Converted string is {receivedString}");
//if(receivedString.Equals("Yes"))
// Toast.MakeText(ApplicationContext, "Access Granted", ToastLength.Short).Show(); //arduino will lift the barrier
}
catch (Exception ex)
{
Toast.MakeText(ApplicationContext, "couldn't connect with bluetooth", ToastLength.Short).Show();
Console.WriteLine("\n\n Error is -- " + ex.ToString() + "\n\n");
// this is the function that overwrites the socket in case of failure
}
finally
{
adapter.Disable(); // disable bluetooth
_socket.Close(); //closing communication socket
}
}
public override async Task <bool> DisableBluetoothAsync(bool reenable, bool lowEnergy = true, string rationale = null)
{
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.DefaultAdapter;
// check whether bluetooth is enabled
if (bluetoothAdapter?.IsEnabled ?? false)
{
TaskCompletionSource <State> bluetoothStateChangedCompletionSource = new TaskCompletionSource <State>();
EventHandler <State> StateChangedHandler = (sender, newState) =>
{
if (newState == State.On || newState == State.Off)
{
bluetoothStateChangedCompletionSource.TrySetResult(newState);
}
};
AndroidBluetoothBroadcastReceiver.STATE_CHANGED += StateChangedHandler;
try
{
if (!bluetoothAdapter.Disable())
{
bluetoothStateChangedCompletionSource.TrySetResult(State.On);
}
}
catch (Exception)
{
bluetoothStateChangedCompletionSource.TrySetResult(State.On);
}
await bluetoothStateChangedCompletionSource.Task;
// try to reenable without user interaction -- may not be allowed.
if (reenable)
{
bluetoothStateChangedCompletionSource = new TaskCompletionSource <State>();
try
{
if (!bluetoothAdapter.Enable())
{
bluetoothStateChangedCompletionSource.TrySetResult(State.Off);
}
}
catch (Exception)
{
bluetoothStateChangedCompletionSource.TrySetResult(State.Off);
}
await bluetoothStateChangedCompletionSource.Task;
}
AndroidBluetoothBroadcastReceiver.STATE_CHANGED -= StateChangedHandler;
}
bool isEnabled = bluetoothAdapter?.IsEnabled ?? false;
// dispatch an intent to reenable bluetooth, which will require user interaction.
if (reenable && !isEnabled)
{
return(await EnableBluetoothAsync(lowEnergy, rationale));
}
else
{
return(isEnabled);
}
}
public async Task <List <BluetoothDevice> > FetchResultsAsync()
{
var running = true;
var discoveryCanceled = false;
while (running)
{
await new Select {
Case(ChannelFactory.Timeout(TimeSpan.FromSeconds(30)), async() => {
Console.WriteLine("Watchdog timeout at discovery!");
adapter.CancelDiscovery();
Console.WriteLine("Adapter enabled: " + adapter.IsEnabled);
Console.WriteLine("Disabling adapter...");
adapter.Disable();
await Task.Delay(5000);
Console.WriteLine("Enabling adapter...");
adapter.Enable();
await Task.Delay(10000);
running = false;
}),
Case(intentChannel, intent => {
Console.WriteLine($"GOT INTENT: " + intent.Action);
var device = (BluetoothDevice)intent.GetParcelableExtra(BluetoothDevice.ExtraDevice);
switch (intent.Action)
{
case BluetoothAdapter.ActionDiscoveryStarted:
if (state != 0)
{
Console.WriteLine("WARN: STATE IS " + state + " NOT 0");
}
state = 1;
Console.WriteLine($"Started Discovery");
break;
case BluetoothDevice.ActionFound:
if (state != 1 && state != 2)
{
Console.WriteLine("WARN: STATE IS " + state + " NOT 1 or 2");
}
state = 2;
Console.WriteLine($"Found: {device.Address} {device.Name ?? "[no name]"}");
if (device.Name == null)
{
Console.WriteLine("Skip as no name!");
return;
}
allDiscoveredDevicesByMac.TryAdd(device.Address, device);
break;
case BluetoothAdapter.ActionDiscoveryFinished:
if (state != 2)
{
Console.WriteLine("WARN: STATE IS " + state + " NOT 2");
return;
}
state = 3;
Console.WriteLine($"Finished Discovery, Performing Service Discovery for Filtering");
adapter.CancelDiscovery();
allDiscoveredDevicesByMac.ForEach(kvp => pendingServiceDiscoveryDevices.AddOrThrow(kvp.Value));
running = TriggerNextServiceDiscoveryElseCompletion();
break;
case BluetoothDevice.ActionUuid:
if (state != 3 && state != 4)
{
Console.WriteLine("WARN: STATE IS " + state + " NOT 3 or 4");
}
state = 4;
Console.WriteLine($"Got UUIDs of device {device.Address} {device.Name ?? "[no name]"}");
var uuidObjects = intent.GetParcelableArrayExtra(BluetoothDevice.ExtraUuid);
if (uuidObjects != null)
{
var uuids = uuidObjects.Cast <ParcelUuid>().ToArray();
uuids.ForEach(Console.WriteLine);
// Equality isn't implemented by uuid, so compare tostrings...
if (uuids.Any(uuid => uuid.ToString().Equals(CampfireNetBluetoothConstants.APP_UUID.ToString())) ||
uuids.Any(uuid => uuid.ToString().Equals(CampfireNetBluetoothConstants.FIRMWARE_BUG_REVERSE_APP_UUID.ToString())))
{
Console.WriteLine($"Found CampfireNet device {device.Address} {device.Name ?? "[no name]"}");
BluetoothDevice existing;
if (discoveredCampfireNetDevices.TryGetValue(device.Address, out existing))
{
Console.WriteLine("Device already discovered!");
}
else
{
discoveredCampfireNetDevices.TryAdd(device.Address, device);
}
}
}
if (!allDiscoveredDevicesByMac.ContainsKey(device.Address))
{
Console.WriteLine("Unrequested UUID, so tossing");
return;
}
if (serviceDiscoveredDevicesByMac.TryAdd(device.Address, device))
{
running = TriggerNextServiceDiscoveryElseCompletion();
}
break;
default:
throw new NotImplementedException($"Unhandled intent action: {intent.Action}");
}
})
}.ConfigureAwait(false);
}
Console.WriteLine("Returning discovered list. Count: " + discoveredCampfireNetDevices.Values.ToList().Count);
return(discoveredCampfireNetDevices.Values.ToList());
}
public void Disable() => _bluetoothAdapter?.Disable();
