title: Android Bluetooth: Connect()/Disconnect()
body: <p>I currently am designing an app which needs to connect to a device, write/read data, and close the connection reliably.  Currently I have the write/read solid.  My disconnect and then reconnect is terribly unreliable, and often actually crash the phone.. and sometimes Eclipse.  I've been looking through numerous articles trying to figure it out and.. no luck..</p>
  
  <p>****CONNECT FUNCTION**</p>
  
  <pre><code>public boolean connect()
  {
    ConfigData.getInstance();
    BluetoothSocket tmp = null;
    BluetoothDevice device = ConfigData.m_SharedBluetoothDevice;
    Method m;
    try {
  
     tmp = device.createRfcommSocketToServiceRecord(MY_UUID);//(BluetoothSocket)
      m.invoke(device, 1);
    } catch (SecurityException e) { 
     e.printStackTrace();
    } catch (IllegalArgumentException e) {  
     e.printStackTrace();
    } 
    catch (IOException e) {
     e.printStackTrace();
    }
          ConfigData.m_SharedBluetoothSocket = tmp;
          try {
     ConfigData.m_SharedBluetoothSocket.connect();
     ConfigData.bIsBTConnected = true;
    } catch (IOException e) {
     try {
      closeSocket();
      m = device.getClass().getMethod("createRfcommSocket", new Class[] {int.class});
      tmp = (BluetoothSocket) m.invoke(device, 1);
     } catch (SecurityException e1) {
      e1.printStackTrace();
     } catch (NoSuchMethodException e1) {
      e1.printStackTrace();
     } catch (IllegalArgumentException e1) {
      e.printStackTrace();
     } catch (IllegalAccessException e1) {
      e.printStackTrace();
     } catch (InvocationTargetException e1) {
      e.printStackTrace();
     }
     ConfigData.m_SharedBluetoothSocket = tmp;
     try {
      ConfigData.m_SharedBluetoothSocket.connect();
      ConfigData.bIsBTConnected = true;
     } catch (IOException e1) {
      ConfigData.m_BluetoothException += e1.toString();
      ConfigData.bIsBTConnected = false;
      return false;
  
     }
     e.printStackTrace();
     return true;
    }
          return true;
   }
  </code></pre>
  
  <p>****Disconnect Function**</p>
  
  <pre><code> public void destroySocket()
   {
       try {
        if(m_InStream != null)
        {
         m_InStream.close();
         m_InStream = null;
        }
        if(m_OutStream != null)
        {
         m_OutStream.close();
         m_OutStream  = null;
        }
        if(ConfigData.m_SharedBluetoothSocket != null)
        {
         ConfigData.m_SharedBluetoothSocket.close();
         ConfigData.m_SharedBluetoothSocket = null;
        }
        if(m_InStream == null &amp;&amp; m_OutStream == null &amp;&amp; ConfigData.m_SharedBluetoothSocket == null)
     {
         ConfigData.bIsBTConnected = false;
     }
    } catch (IOException e1) {
     m_InStream = null;
     m_OutStream  = null;
     ConfigData.m_SharedBluetoothSocket = null;
     e1.printStackTrace();
    }
   }
  </code></pre>
  
  <p>So the disconnect is successful and returns everything null.  The problem is that when I reconnect it blocks at the 2nd connect attempt and will either just sit there or completely crash the phone, causing several reboots.  </p>
  
  <p>Does anyone have any advice here? Its been extremely frustrating. Any help would be much appreciated!!</p>
  
  <p>Thanks and Gig 'Em!
  TxAg</p>