發現並配對藍牙設備

Question

如何使用Java發現並配對Android藍牙設備？任何代碼供我參考？

Answer 1

下面的代碼會發現配對和未配對設備的列表之後，你必須實現客戶端和服務器，它負責配對設備和發送數據到設備，因爲你可以使用BluetoothChatSample這會給你一個想法。

private Set<BluetoothDevice> pairedDevices; 
public static ArrayList<Object> BondedDeviceList; 
public static ArrayList<Object> NewDeviceList; 

public void makeDiscoverable() 
{ 
    discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE); 
    discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300); 
    activity.startActivity(discoverableIntent); 
} 

//It will Add the paired device in the BondedDeviceList 
public void queryPairedDevice(){ 
    pairedDevices = mBluetoothAdapter.getBondedDevices(); 

    // If there are paired devices 
    if(pairedDevices==null) 
    { 
     //No Bonded Devices 

    }else 
    { 
     if (pairedDevices.size() > 0) { 
      // Loop through paired devices 
      for (BluetoothDevice device : pairedDevices) { 
       BondedDeviceList.add(device); 
      } 
      BondedDeviceList.add("End"); 
     } 
    } 
} 

//Broadcast Receiver will find the Available devices and the discovery finished 
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.trim())) { 
      // 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) { 
       NewDeviceList.add(device); 
      } 
      // When discovery is finished, change the Activity title 
     } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) { 
      if (NewDeviceList.isEmpty() == true) { 
       String noDevices = "No Devices"; 
       NewDeviceList.add(noDevices); 
      } 
      System.out.println("Discovery Finished!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"); 
      NewDeviceList.add("End"); 
     } 
    } 
}; 

//This is query for the bluetooth devices 
public void queryDevices(){ 
    actionFoundFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND); 
    activity.registerReceiver(mReceiver, actionFoundFilter); 
    // Don't forget to unregister during onDestroy 

    discoveryFinishedFilter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); 
    activity.registerReceiver(mReceiver, discoveryFinishedFilter); 
    // Don't forget to unregister during onDestroy 
    queryPairedDevice(); 
    mBluetoothAdapter.startDiscovery(); 
} 


//Unregister the receivers 
public void unregisterReceiver() { 
    // Make sure we're not doing discovery anymore 
    if (mBluetoothAdapter != null) { 
      mBluetoothAdapter.cancelDiscovery(); 
    } 
    // Unregister broadcast listeners 
    activity.unregisterReceiver(mReceiver); 
} 

乾杯。