Android 内部蓝牙打印机错误-在PrinterInterface.open上失败
我为wizarhand设备开发了一个应用程序,该设备具有内置蓝牙设备。我可以连接所有外部蓝牙设备,但连接内部设备时会出现以下错误: 在PrinterInterface.open上失败 这是我的代码:Android 内部蓝牙打印机错误-在PrinterInterface.open上失败,android,bluetooth,Android,Bluetooth,我为wizarhand设备开发了一个应用程序,该设备具有内置蓝牙设备。我可以连接所有外部蓝牙设备,但连接内部设备时会出现以下错误: 在PrinterInterface.open上失败 这是我的代码: public BTPrinter(String namePrefix) throws Exception { BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter(); Set pairedDe
public BTPrinter(String namePrefix) throws Exception {
BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter();
Set pairedDevices = btAdapter.getBondedDevices();
String address = null;
Iterator e = pairedDevices.iterator();
BluetoothDevice device;
while(e.hasNext()) {
device = (BluetoothDevice)e.next();
if(device.getName().equals("WizarPOS_Printer")) {
address = device.getAddress();
this.deviceName = device.getName();
break;
}
}
if(address == null) {
Log.d("BTPrinter", "Bluetooth Printer Not Found.");
}
device = btAdapter.getRemoteDevice(address);
try {
if(Build.VERSION.SDK_INT >= 10) {
try {
this.btSocket = device.createInsecureRfcommSocketToServiceRecord(MY_UUID);
} catch (Exception var12) {
;
}
}
if(this.btSocket == null) {
this.btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
}
} catch (IOException var13) {
Log.d("BTPrinter", "Failed to create bluetooth socket.");
}
btAdapter.cancelDiscovery();
try {
this.btSocket.connect();
} catch (Exception var11) {
Log.d("BTPrinter", "Failed to connect to printer.");
try {
this.btSocket.close();
} catch (Exception var10) {
;
}
}
if(!this.btSocket.isConnected()) {
try {
Thread.sleep(400L);
} catch (InterruptedException var8) {
Thread.currentThread().interrupt();
}
throw new Exception("Bluetooth connection issue");
} else {
try {
this.outStream = this.btSocket.getOutputStream();
this.inStream = this.btSocket.getInputStream();
Log.d("BTPrinter", "Connected to " + this.deviceName + ".");
} catch (IOException var9) {
throw new Exception("Bluetooth connection issue");
}
}
}