Android 安卓设备已经与打印机配对,但仍不断要求输入pin码
我通常通过Android设置菜单将设备配对,然后尝试以编程方式将其连接到打印机。我搜索配对设备,尝试连接,然后它再次提示我输入pin。我试图避免每次建立连接时都必须键入密码 以下是相关代码:Android 安卓设备已经与打印机配对,但仍不断要求输入pin码,android,bluetooth,Android,Bluetooth,我通常通过Android设置菜单将设备配对,然后尝试以编程方式将其连接到打印机。我搜索配对设备,尝试连接,然后它再次提示我输入pin。我试图避免每次建立连接时都必须键入密码 以下是相关代码: BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedD
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
String defaultPrinter = UserSession.getDefaultPrinter( context );
BluetoothDevice preferredDevice = null;
if ( defaultPrinter == null ) {
//start activity regarding selecting a default printer
}
else {
for (BluetoothDevice device : pairedDevices)
if ( device.getAddress().equals( defaultPrinter ) ) {
preferredDevice = device;
break;
}
}
UUID id = UUID.fromString( BLUE_TOOTH_UUID );
try {
selectedDeviceSocket = preferredDevice.createRfcommSocketToServiceRecord( id );
selectedDeviceSocket.connect();
isConnected = true;
return selectedDeviceSocket.getOutputStream();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
BluetoothAdapter mBluetoothAdapter=BluetoothAdapter.getDefaultAdapter();
设置pairedDevices=mBluetoothAdapter.getBondedDevices();
字符串defaultPrinter=UserSession.getDefaultPrinter(上下文);
BluetoothDevice preferredDevice=null;
如果(defaultPrinter==null){
//启动有关选择默认打印机的活动
}
否则{
用于(蓝牙设备:pairedDevices)
if(device.getAddress().equals(defaultPrinter)){
首选设备=设备;
打破
}
}
UUID id=UUID.fromString(蓝牙);
试一试{
selectedDeviceSocket=preferredDevice.createRfcommSocketToServiceRecord(id);
选择DeviceSocket.connect();
断开连接=正确;
返回selectedDeviceSocket.getOutputStream();
}
捕获(IOE异常){
//TODO自动生成的捕捉块
e、 printStackTrace();
}
只有重新输入正确的pin码,才会发生连接。尝试生成您自己的UUID:
private UUID generateUuid() {
String android_id = Secure.getString(getApplicationContext()
.getContentResolver(), Secure.ANDROID_ID);
Log.i("System out", "android_id : " + android_id);
final TelephonyManager tm = (TelephonyManager) getBaseContext()
.getSystemService(Context.TELEPHONY_SERVICE);
final String tmDevice, tmSerial, androidId;
tmDevice = "" + tm.getDeviceId();
Log.i("System out", "tmDevice : " + tmDevice);
tmSerial = "" + tm.getSimSerialNumber();
Log.i("System out", "tmSerial : " + tmSerial);
androidId = ""
+ android.provider.Settings.Secure.getString(
getContentResolver(),
android.provider.Settings.Secure.ANDROID_ID);
UUID deviceUuid = new UUID(androidId.hashCode(),
((long) tmDevice.hashCode() << 32) | tmSerial.hashCode());
return deviceUuid;
}
*需要读取\u电话\u状态权限
selectedDeviceSocket = preferredDevice.createRfcommSocketToServiceRecord( generateUuid() );