improved ui and code warnings

lib/objects/bluetooth_object.dart

@@ -16,15 +16,15 @@ class BluetoothObject {
 
   String id = "";
   String _primaryThumbprint = "";
-  String _secondaryThumbprint = "";
+  final String _secondaryThumbprint = "";
 
   late BluetoothConnection? _connection;
   late Stream<Uint8List> _connectionStream;
   late StreamSubscription<Uint8List> _connectionStreamSubscription;
 
-  CloudServiceAPI _cloudServiceAPI = CloudServiceAPI();
+  final CloudServiceAPI _cloudServiceAPI = CloudServiceAPI();
 
-  late Uint8List _messageBufferBits;
+  //late Uint8List _messageBufferBits;
   late String _messageBufferChars = "";
 
   bool _isDisconnecting = false;
@@ -222,8 +222,6 @@ class BluetoothObject {
   Future<void> sendData(String output) async {
     if (_connection == null) return;
     bool nameAvailable = await _cloudServiceAPI.checkNameAvailability(output);
-    // String output = "0123456789 abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ";// !§%&()=?#!?";
-    // String output = "myDevice123";// !§%&()=?#!?";
     if (!nameAvailable) return;
     id = output;
     _connection!.output.add(Uint8List.fromList(const AsciiEncoder().convert("$output \r\n")));

lib/screens/bluetooth_device_settings.dart

@@ -14,8 +14,7 @@ class BluetoothDeviceSettings extends StatefulWidget {
 
 class BluetoothDeviceSettingsState extends State<BluetoothDeviceSettings> {
   late BluetoothObject _bluetoothObject;
-
+  String _textInput = ""; // 0123456789 abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
-  String _messageBuffer = "";
 
   @override
   void initState() {
@@ -23,9 +22,6 @@ class BluetoothDeviceSettingsState extends State<BluetoothDeviceSettings> {
     _bluetoothObject = widget.bluetoothObject;
   }
 
-  String _textInput = "0123456789 abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ";
-  String _textOuput = "";
-
   ButtonStyle buttonStyle = ElevatedButton.styleFrom(
     foregroundColor: Colors.black,
     backgroundColor: const Color(0xFFFDE100), // Text Color (Foreground color)
@@ -59,7 +55,7 @@ class BluetoothDeviceSettingsState extends State<BluetoothDeviceSettings> {
                 ],
               ),
               Padding(
-                  padding: const EdgeInsets.symmetric(horizontal: 16.0),
+                  padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 0.0),
                   child: Row(mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: [
                     // const EdgeInsets defaultContentPadding = EdgeInsets.symmetric(horizontal: 16.0);
                     Expanded(
@@ -85,6 +81,12 @@ class BluetoothDeviceSettingsState extends State<BluetoothDeviceSettings> {
                     ))
                   ])),
               const Divider(),
+              Padding(
+                padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 0.0),
+                child:
+                  SizedBox(
+                    width: double.infinity,
+                    child:
                       ElevatedButton(
                         onPressed: () async {
                           _bluetoothObject.sendData(_textInput);
@@ -92,18 +94,10 @@ class BluetoothDeviceSettingsState extends State<BluetoothDeviceSettings> {
                         style: buttonStyle,
                         child: const Text("Send Data"),
                       ),
-              ElevatedButton(
+                  )
-                onPressed: () async {
-                  setState(() {
-                    _textOuput = "";
-                  });
-                },
-                style: buttonStyle,
-                child: const Text("Clear Output"),
               ),
-              Text(_textOuput),
               Padding(
-                padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 16.0),
+                padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 8.0),
                 child: TextField(
                   decoration: const InputDecoration(
                     border: OutlineInputBorder(),

lib/screens/bluetooth_screen.dart

@@ -50,7 +50,7 @@ class _BluetoothScreen extends State<BluetoothScreen> {
     _activeObject = null;
     _streamSubscription = null;
     if (widget.start) {
-      _startDiscovery();
+      _initAsync();
     }
   }
 
@@ -63,8 +63,13 @@ class _BluetoothScreen extends State<BluetoothScreen> {
     debugPrint("called dispose");
   }
 
+  Future<void> _initAsync() async {
+    await _enablePermissions();
+    await _enableBluetooth();
+    await _startDiscovery();
+  }
+
   Future<void> _enablePermissions() async {
-    debugPrint("Test");
     PermissionStatus bluetoothScan = await Permission.bluetoothScan.request();
     PermissionStatus bluetoothConnect = await Permission.bluetoothConnect.request();
     bool granted = bluetoothScan.isGranted && bluetoothConnect.isGranted;
@@ -74,7 +79,14 @@ class _BluetoothScreen extends State<BluetoothScreen> {
   }
 
   Future<void> _enableBluetooth() async {
-    if (!_enabledPermissions) {
+    if (_enabledBluetooth) {
+      return;
+    }
+    BluetoothState state = await FlutterBluetoothSerial.instance.state;
+    if (state == BluetoothState.STATE_ON) {
+      setState(() {
+        _enabledBluetooth = true;
+      });
       return;
     }
     bool? enabled = await FlutterBluetoothSerial.instance.requestEnable();
@@ -85,7 +97,8 @@ class _BluetoothScreen extends State<BluetoothScreen> {
   }
 
   Future<void> _startDiscovery() async {
-    if (!_enabledPermissions) {
+    debugPrint("enabled: $_enabledPermissions");
+    if (!_enabledPermissions && !_enabledBluetooth) {
       return;
     }
     setState(() => _isDiscovering = true);
@@ -137,9 +150,6 @@ class _BluetoothScreen extends State<BluetoothScreen> {
     _activeObject!.isConnected ? await bluetoothObject.disconnectDevice() : await bluetoothObject.connectDevice();
   }
 
-  //stty -F /dev/service 19200 parenb -parodd -cstopb cs8
-  //cat /dev/service | xargs -n 1 /home/script/automaticcloud.sh
-
   @override
   Widget build(BuildContext context) {
     return Scaffold(