feat: input zplData

android/src/main/java/id/kalanusa/flutter_zsdk/zplprinthandler/ZplPrintHandler.java

 public class ZplPrintHandler {
 
     public void handle(@NonNull MethodCall call, @NonNull MethodChannel.Result result) {
-        printZplOverBluetooth(result);
+        printZplOverBluetooth(result, call.argument("zplData"));
     }
 
 
-    public void printZplOverBluetooth(@NonNull MethodChannel.Result result) {
+    public void printZplOverBluetooth(@NonNull MethodChannel.Result result, String zplData) {
         new Thread(new Runnable() {
             @Override
             public void run() {
 //                Log.w("From Native (Android)", "isConnected from zplPrinterHandler " + BluetoothConnectionHolder.connection.isConnected() );
                 try {
-                    String zplData = "^XA^PW624^LL800^FO20,20^A0N,25,25^FDThis is a ZPL test.^FS^FO20,60^BQ , 60,10 , , , A ^FD 1234ABC.^FS^XZ";
+//                    String zplData = "^XA^PW624^LL800^FO20,20^A0N,25,25^FDThis is a ZPL test.^FS^FO20,60^BQ , 60,10 , , , A ^FD 1234ABC.^FS^XZ";
                     BluetoothConnectionHolder.connection.write(zplData.getBytes());
                 } catch (ConnectionException e) {
                     Log.w("From Native (Android)", "something went wrong when sending data to printer");

example/lib/main.dart

   Future<void> printZplOverBluetooth() async {
     print('invoked printZplOverBluetooth from dart');
     try {
-      await _flutterZsdkPlugin.printZplOverBluetooth();
+      await _flutterZsdkPlugin.printZplOverBluetooth("^XA^PW624^LL800^FO20,20^A0N,25,25^FDThis is a ZPL test.^FS^FO20,60^BQ ,2,10 , , , A ^FDQA,http://192.168.102.170:4218/?q=IDC4C321S023^FS^^FO20,320^A0N,25,25^FDDart Zpl Test.^FS^XZ");
       print('printZplOverBluetooth successfully from dart');
       
     } on FlutterZsdkException catch (e) {

lib/flutter_zsdk.dart

     return FlutterZsdkPlatform.instance.closeConnection();
   }
 
-  Future<void> printZplOverBluetooth() {
-    return FlutterZsdkPlatform.instance.printZplOverBluetooth();
+  Future<void> printZplOverBluetooth(String zplData) {
+    return FlutterZsdkPlatform.instance.printZplOverBluetooth(zplData);
   }
 }

lib/src/flutter_zsdk_method_channel.dart

   }
 
   @override
-  Future<void> printZplOverBluetooth() async {
+  Future<void> printZplOverBluetooth(String zplData) async {
     try {
-      await methodChannel.invokeMethod('printZplOverBluetooth');
+      await methodChannel.invokeMethod('printZplOverBluetooth', {'zplData': zplData});
     } catch (e) {
       throw FlutterZsdkException("Failed to print ZPL over Bluetooth: $e");
     }

lib/src/flutter_zsdk_platform_interface.dart

     throw UnimplementedError('closeConnection() has not been implemented.');
   }
 
-  Future<void> printZplOverBluetooth() {
+  Future<void> printZplOverBluetooth(String zplData) {
     throw UnimplementedError('printZplOverBluetooth() has not been implemented.');
   }
 }