feat: change bluetooth printer connection

android/src/main/java/id/kalanusa/flutter_zsdk/bluetoothconnectionhandler/BluetoothConnectionHandler.java

@@ -19,11 +19,25 @@ public class BluetoothConnectionHandler {
 
         switch (call.method) {
             case "bluetoothOpenConnection":
-                if (BluetoothConnectionHolder.connection == null) {
-                    BluetoothConnectionHolder.updateConnection(new BluetoothConnectionInsecure(call.argument("macAddress")));
+                String macAddressArgument = call.argument("macAddress");
+
+                if (BluetoothConnectionHolder.connection != null) {
+                    String connectionInfo = BluetoothConnectionHolder.connection.getSimpleConnectionName();
+                    String currentConnectionMacAddress = connectionInfo.substring(0, 17);
+
+                    if (currentConnectionMacAddress != macAddressArgument) {
+                        closeAndReopenConnection(result, macAddressArgument);
+
+                    }
+                    break;
                 }
 
-                openConnection(result);
+                if (BluetoothConnectionHolder.connection == null) {
+                    BluetoothConnectionHolder.updateConnection(new BluetoothConnectionInsecure(macAddressArgument));
+
+                    openConnection(result);
+
+                }
                 break;
 
             case "isConnected":
@@ -54,10 +68,31 @@ public class BluetoothConnectionHandler {
         }).start();
     }
 
+    public void closeAndReopenConnection(@NonNull MethodChannel.Result result, String newMacAddress) {
+        new Thread(new Runnable() {
+            @Override
+            public void run() {
+                try {
+                    Looper.prepare();
+                    BluetoothConnectionHolder.connection.close();
+                    BluetoothConnectionHolder.updateConnection(new BluetoothConnectionInsecure(newMacAddress));
+                    BluetoothConnectionHolder.connection.open();
+                    Looper.myLooper().quit();
+                    result.success(null);
+                    Log.w("From Native (Android)", "close and reopen connection finished");
+                } catch (ConnectionException e) {
+                    Log.w("From Native (Android)", "Connection Exception threw " + e);
+                    result.error("CLOSE_AND_REOPEN_CONNECTION_ERROR", "Cant close and connect to new printers", e.getMessage());
+                }
+            }
+        }).start();
+    }
+
     public void checkConnection(@NonNull MethodChannel.Result result) {
         new Thread(new Runnable() {
             @Override
             public void run() {
+                BluetoothConnectionHolder.getSimpleConnectionName();
                 boolean isConnected = BluetoothConnectionHolder.connection.isConnected();
 
                 result.success(isConnected);

android/src/main/java/id/kalanusa/flutter_zsdk/bluetoothconnectionhandler/BluetoothConnectionHolder.java

@@ -4,6 +4,8 @@ import androidx.annotation.NonNull;
 
 import com.zebra.sdk.comm.Connection;
 
+import io.flutter.Log;
+
 public class BluetoothConnectionHolder {
     static public Connection connection;
 
@@ -14,4 +16,13 @@ public class BluetoothConnectionHolder {
     static public void updateConnection(@NonNull Connection connection) {
         BluetoothConnectionHolder.connection = connection;
     }
+
+    static public void getSimpleConnectionName() {
+        String simpleConnectionName = BluetoothConnectionHolder.connection.getSimpleConnectionName();
+        String macAddressFromSimpleConnectionName = simpleConnectionName.substring(0, 17);
+
+
+        Log.w("From Native (Android)", "SimpleConnectioName: " + BluetoothConnectionHolder.connection.getSimpleConnectionName());
+        Log.w("From Native (Android)", "MacAddressFromSimpleConnectionName: " + macAddressFromSimpleConnectionName);
+    }
 }

example/lib/main.dart

@@ -186,7 +186,7 @@ class _MyAppState extends State<MyApp> {
         
             ElevatedButton(
               child: Text('Connect to $_selectedBluetoothPrinterMacAddress'),
-              onPressed: _selectedBluetoothPrinterMacAddress == null || _connectedPrinter != null ? null : openConnection,
+              onPressed: _selectedBluetoothPrinterMacAddress == null ? null : openConnection,
             ),
             SizedBox(height: 20),