Android上的藍牙

Question

我一直在努力通過android建立藍牙連接。

我試圖建立它幾個星期，只有我的代碼的一半工作。

正在工作的部分是：

1. 打開/關閉藍牙;

2. 找到配對的設備;

3. 掃描可用設備。

有人可以通過Bluetoothsocket發給我一個包含連接部分的源代碼嗎？

這將真正幫助我

Answer 1

對通過的BluetoothSocket連接

UUID SERIAL_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb"); 

BluetoothSocket socket = null; 

class UserInterface extends Thread { 
    BluetoothDevice bdDevice; 
    public UserInterface() { 
     bdDevice = your pair device; 

    } 

    @Override 
    public void run() { 
     Looper.prepare(); 
     try { 

      BluetoothDevice device = bluetoothAdapter.getRemoteDevice(bdDevice.getAddress()); 

      if (socket != null && socket.isConnected()) { 
       is1.close(); 
       os1.close(); 
       socket.close(); 

      } 
      try { 
       socket = device.createInsecureRfcommSocketToServiceRecord(SERIAL_UUID); 
      } catch (Exception e) { 
       Log.e("", "Error creating socket"); 
      } 
      if (bluetoothAdapter.isDiscovering()) { 
       bluetoothAdapter.cancelDiscovery(); 
      } 


      try { 
       socket.connect(); 
       Log.e("", "Connected Rfcomm"); 

      } catch (IOException e) { 
       Log.e("", e.getMessage()); 
       try { 
        Log.e("", "trying fallback..."); 

        socket = device.createInsecureRfcommSocketToServiceRecord(SERIAL_UUID); 
        socket.connect(); 
        Log.e("", "Connected serial UDID"); 

       } catch (Exception e2) { 
        Log.e("", "Couldn't establish Bluetooth connection!"); 
       } 
      } 


      if (socket.isConnected()) { 
       dismissProgressDialog(); 
       //code after socket connect 

      } else { 
       dismissProgressDialog(); 
       showProgressDialogToast("Please restart polaroid bluetooth"); 
       closeSocket(); 
       Log.i("TAG", "Socket Disconnected"); 
      } 

      Log.i("Log", "Removed" + bdDevice.getName()); 
     } catch (Exception e) { 
      // TODO Auto-generated catch block 
      Log.i("Log", "Under Catch of thread"); 
      e.printStackTrace(); 
      dismissProgressDialog(); 
     } 
    } 
} 

利用Thread類這樣

UserInterface userInterface = new UserInterface(); 
userInterface.start(); 

Answer 2

對於Android手機異步類，藍牙套接字將一個端口上偵聽一次藍牙打開。你應該創建一個藍牙客戶端連接到藍牙服務器。

Answer 3

要獲得配對設備

mBtAdapter = BluetoothAdapter.getDefaultAdapter(); 
// Get a set of currently paired devices 
Set<BluetoothDevice> pairedDevices = mBtAdapter.getBondedDevices(); 
// If there are paired devices, add each one to the ArrayAdapter 
    if (pairedDevices.size() > 0) 
    { 
    findViewById(R.id.title_paired_devices).setVisibility(View.VISIBLE); 
    for(BluetoothDevice device : pairedDevices) 
    { 
     mPairedDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress()); 
    } 
} 

而讓你有寫廣播接收器監聽發現的設備

private final BroadcastReceiver mReceiver = new BroadcastReceiver() { 
     @Override 
      public void onReceive(Context context, Intent intent) { 
      String action = intent.getAction(); 
      // When discovery finds a device 
      if (BluetoothDevice.ACTION_FOUND.equals(action)) { 
       // Get the BluetoothDevice object from the Intent 
       BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 
       // If it's already paired, skip it, because it's been listed already 
       if (device.getBondState() != BluetoothDevice.BOND_BONDED) { 
        mNewDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress()); 
       } 
       // When discovery is finished, change the Activity title 
      } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) { 
       setProgressBarIndeterminateVisibility(false); 
       setTitle(R.string.select_device); 
       if (mNewDevicesArrayAdapter.getCount() == 0) { 
        String noDevices = getResources().getText(R.string.none_found).toString(); 
        mNewDevicesArrayAdapter.add(noDevices); 
       } 
      } 
     } 
    }; 

註冊發現的藍牙設備的列表清單播放設備時發現

IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND); 
    this.registerReceiver(mReceiver, filter); 
    // Register for broadcasts when discovery has finished 
    filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); 
    this.registerReceiver(mReceiver, filter); 

//請求從BluetoothAdapter發現

mBtAdapter.startDiscovery();