xprinter_android 0.0.4 
xprinter_android: ^0.0.4 copied to clipboard
A Flutter plugin for controlling XPrinter thermal printers on Android. This plugin allows communication with XPrinter devices over Bluetooth for printing images.
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:xprinter/xprinter.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatefulWidget {
const MyApp({super.key});
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
final Xprinter _xprinterPlugin = Xprinter();
final ImagePicker _imagePicker = ImagePicker();
List<BluetoothPrinterDevice> _devices = [];
String _status = 'Disconnected';
bool _isConnected = false;
XFile? _selectedImage;
double _imageWidth = 460.0;
@override
void initState() {
super.initState();
_initializePrinterSDK();
}
Future<void> _initializePrinterSDK() async {
try {
final initialized = await _xprinterPlugin.initialize();
setState(() {
_status = initialized ? 'SDK initialized' : 'Failed to initialize SDK';
});
} catch (e) {
setState(() {
_status = 'Error initializing SDK: $e';
});
}
}
Future<void> _requestPermissions() async {
try {
final hasPermissions = await _xprinterPlugin.hasBluetoothPermissions();
if (!hasPermissions) {
final granted = await _xprinterPlugin.requestBluetoothPermissions();
setState(() {
_status = granted ? 'Permissions granted' : 'Permissions denied';
});
} else {
setState(() {
_status = 'Permissions already granted';
});
}
} catch (e) {
setState(() {
_status = 'Error requesting permissions: $e';
});
}
}
Future<void> _getBluetoothDevices() async {
try {
final devices = await _xprinterPlugin.getBluetoothDevices();
setState(() {
_devices = devices;
_status = 'Found ${devices.length} devices';
});
} catch (e) {
setState(() {
_status = 'Error getting devices: $e';
});
}
}
Future<void> _connectToPrinter(String macAddress) async {
try {
setState(() {
_status = 'Connecting...';
});
final connected = await _xprinterPlugin.connectToPrinter(macAddress);
setState(() {
_isConnected = connected;
_status = connected ? 'Connected' : 'Failed to connect';
});
} catch (e) {
setState(() {
_status = 'Error connecting: $e';
});
}
}
Future<void> _pickImageFromGallery() async {
try {
final XFile? image = await _imagePicker.pickImage(
source: ImageSource.gallery,
maxWidth: 800,
maxHeight: 800,
imageQuality: 85,
);
if (image != null) {
setState(() {
_selectedImage = image;
_status = 'Image selected: ${image.name}';
});
}
} catch (e) {
setState(() {
_status = 'Error picking image: $e';
});
}
}
Future<void> _pickImageFromCamera() async {
try {
final XFile? image = await _imagePicker.pickImage(
source: ImageSource.camera,
maxWidth: 800,
maxHeight: 800,
imageQuality: 85,
);
if (image != null) {
setState(() {
_selectedImage = image;
_status = 'Image captured: ${image.name}';
});
}
} catch (e) {
setState(() {
_status = 'Error capturing image: $e';
});
}
}
// Future<String> _convertImageToBase64(XFile imageFile) async {
// try {
// final Uint8List imageBytes = await imageFile.readAsBytes();
// final String base64String = base64Encode(imageBytes);
// return base64String;
// } catch (e) {
// throw Exception('Failed to convert image to base64: $e');
// }
// }
Future<void> _printSelectedImage() async {
if (!_isConnected) {
setState(() {
_status = 'Printer not connected';
});
return;
}
if (_selectedImage == null) {
setState(() {
_status = 'No image selected';
});
return;
}
try {
setState(() {
_status = 'Converting image...';
});
// Convert image to base64
// final String base64Image = await _convertImageToBase64(_selectedImage!);
setState(() {
_status = 'Printing image...';
});
// data['data']['labels'];
// Print the base64 image
// final success = await _xprinterPlugin.printImage(
// base64Image,
// width: _imageWidth,
// );
// setState(() {
// _status = success ? 'Print successful!' : 'Print failed';
// });
} catch (e) {
setState(() {
_status = 'Error printing image: $e';
});
}
}
Future<void> _printTestImage() async {
if (!_isConnected) {
setState(() {
_status = 'Printer not connected';
});
return;
}
try {
setState(() {
_status = 'Printing test image...';
});
// Create a simple test image (1x1 pixel PNG in base64)
final String testImageBase64 =
'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNkYPhfDwAChwGA60e6kgAAAABJRU5ErkJggg==';
final success = await _xprinterPlugin.printImage(
testImageBase64,
width: _imageWidth,
);
setState(() {
_status = success ? 'Test print successful!' : 'Test print failed';
});
} catch (e) {
setState(() {
_status = 'Error printing test image: $e';
});
}
}
Future<void> _disconnectPrinter() async {
try {
await _xprinterPlugin.close();
setState(() {
_isConnected = false;
_status = 'Disconnected';
});
} catch (e) {
setState(() {
_status = 'Error disconnecting: $e';
});
}
}
@override
void dispose() {
_xprinterPlugin.exitSdk();
super.dispose();
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Builder(builder: (context) {
return Scaffold(
appBar: AppBar(
title: const Text('XPrinter Image Example'),
backgroundColor: Colors.blue,
foregroundColor: Colors.white),
body: SingleChildScrollView(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
// Status Card
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Status: $_status',
style: const TextStyle(
fontSize: 16,
fontWeight: FontWeight.bold,
),
),
const SizedBox(height: 8),
Text(
'Connected: ${_isConnected ? "Yes" : "No"}',
style: TextStyle(
color: _isConnected ? Colors.green : Colors.red,
fontWeight: FontWeight.w500,
),
),
],
),
),
),
const SizedBox(height: 16),
// Image Selection Section
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
'Image Selection',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold,
),
),
const SizedBox(height: 12),
if (_selectedImage != null) ...[
Container(
height: 200,
width: double.infinity,
decoration: BoxDecoration(
border: Border.all(color: Colors.grey),
borderRadius: BorderRadius.circular(8),
),
child: ClipRRect(
borderRadius: BorderRadius.circular(8),
child: Image.file(
File(_selectedImage!.path),
fit: BoxFit.contain,
),
),
),
const SizedBox(height: 8),
Text(
'Selected: ${_selectedImage!.name}',
style: const TextStyle(fontSize: 12),
),
const SizedBox(height: 12),
],
Row(
children: [
Expanded(
child: ElevatedButton.icon(
onPressed: _pickImageFromGallery,
icon: const Icon(Icons.photo_library),
label: const Text('Gallery'),
),
),
const SizedBox(width: 8),
Expanded(
child: ElevatedButton.icon(
onPressed: _pickImageFromCamera,
icon: const Icon(Icons.camera_alt),
label: const Text('Camera'),
),
),
],
),
],
),
),
),
const SizedBox(height: 16),
// Print Settings
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
'Print Settings',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold,
),
),
const SizedBox(height: 12),
Text('Image Width: ${_imageWidth.toInt()}px'),
Slider(
value: _imageWidth,
min: 200,
max: 600,
divisions: 20,
label: '${_imageWidth.toInt()}px',
onChanged: (value) {
setState(() {
_imageWidth = value;
});
},
),
],
),
),
),
const SizedBox(height: 16),
// Printer Setup Section
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
'Printer Setup',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold,
),
),
const SizedBox(height: 12),
ElevatedButton(
onPressed: _requestPermissions,
child: const Text('Request Permissions'),
),
const SizedBox(height: 8),
ElevatedButton(
onPressed: _getBluetoothDevices,
child: const Text('Get Bluetooth Devices'),
),
],
),
),
),
const SizedBox(height: 16),
// Device List
if (_devices.isNotEmpty) ...[
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
'Available Printers',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold,
),
),
const SizedBox(height: 12),
SizedBox(
height: 200,
child: ListView.builder(
itemCount: _devices.length,
itemBuilder: (context, index) {
final device = _devices[index];
return Card(
margin: const EdgeInsets.only(bottom: 8),
child: ListTile(
leading: const Icon(Icons.print),
title: Text(device.name),
subtitle: Text(device.address),
trailing: ElevatedButton(
onPressed: () =>
_connectToPrinter(device.address),
child: const Text('Connect'),
),
),
);
},
),
),
],
),
),
),
const SizedBox(height: 16),
],
// Print Actions
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
'Print Actions',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold,
),
),
const SizedBox(height: 12),
Row(
children: [
Expanded(
child: ElevatedButton.icon(
onPressed:
_isConnected ? _printSelectedImage : null,
icon: const Icon(Icons.print),
label: const Text('Print Selected'),
style: ElevatedButton.styleFrom(
backgroundColor: Colors.green,
foregroundColor: Colors.white,
),
),
),
const SizedBox(width: 8),
Expanded(
child: ElevatedButton.icon(
onPressed:
_isConnected ? _printTestImage : null,
icon: const Icon(Icons.bug_report),
label: const Text('Test Print'),
style: ElevatedButton.styleFrom(
backgroundColor: Colors.orange,
foregroundColor: Colors.white,
),
),
),
],
),
const SizedBox(height: 8),
SizedBox(
width: double.infinity,
child: ElevatedButton.icon(
onPressed: _isConnected ? _disconnectPrinter : null,
icon: const Icon(Icons.close),
label: const Text('Disconnect'),
style: ElevatedButton.styleFrom(
backgroundColor: Colors.red,
foregroundColor: Colors.white,
),
),
),
],
),
),
),
],
),
),
);
}),
);
}
}Metadata
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Metadata
A Flutter plugin for controlling XPrinter thermal printers on Android. This plugin allows communication with XPrinter devices over Bluetooth for printing images.
Repository (GitHub)
View/report issues
Documentation
License
MIT (license)
Dependencies
flutter, image_picker, plugin_platform_interface
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Packages that implement xprinter_android
