在Android上读取蓝牙数据传输数据

Question

我想获取/读取连接了两个安卓设备后传递的数据，到目前为止，我在它们之间配对、连接和传输信息，但不确定如何实现读取部分，这里我不确定是否应该使用createRfcommSocketToServiceRecord或listenUsingRfcommWithServiceRecord来创建读取套接字。

我有两个屏幕，一个是用户按下按钮并发送信息的屏幕，另一个是接收方按下另一个按钮并读取数据的屏幕，我不知道同步是否不正确，在我按下“发送”按钮之后，再按下“读”按钮，连接就不可用了，或者这个实现不能全部恢复。

这是我的两次尝试：

尝试1:

    //Executed after the user press the read data button
    private void connectToServerSocket(BluetoothDevice device, UUID uuid) {

          try{                

                BluetoothServerSocket serverSocket = mBluetoothAdapter.listenUsingRfcommWithServiceRecord(device.getName(),uuid);

                //Here is where I get the error:
                //io to Server Socket JSR82 Connection is not created, failed or aborted
                BluetoothSocket clientSocket = serverSocket.accept();

                // Start listening for messages.
                StringBuilder incoming = new StringBuilder();
                listenForMessages(clientSocket, incoming);

                // Add a reference to the socket used to send messages.
                transferSocket = clientSocket;

          } catch (IOException ioe) {        
                this.printToast("Excep io toServerSocket:" + ioe.getMessage());
          } catch (Exception e) {
                this.printToast("Excep toServerSocket:" + e.getMessage());
          }

    }

尝试2:

   private void connectToServerSocket(BluetoothDevice device, UUID uuid) {

          try{ 

                BluetoothServerSocket clientSocket = device.createRfcommSocketToServiceRecord(uuid);
                 //clientSocket without method and invoke is not working either
                 Method m = device.getClass().getMethod("createRfcommSocket", new Class[] {int.class});
                 clientSocket = (BluetoothSocket) m.invoke(device, 1);

                //Here is where I get the error:
                //io to Server Socket JSR82 Connection is not created, failed or aborted
                clientSocket.connect();

                // Start listening for messages.
                StringBuilder incoming = new StringBuilder();
                listenForMessages(clientSocket, incoming);

                // Add a reference to the socket used to send messages.
                transferSocket = clientSocket;

          } catch (IOException ioe) {        
                this.printToast("Excep io toServerSocket:" + ioe.getMessage());
          } catch (Exception e) {
                this.printToast("Excep toServerSocket:" + e.getMessage());
          }

    }

在serverSocket.accept()或clientSocket.connect()上，我得到了例外：

Connection is not created, failed or aborted

如果有人能指导我让数据读取部分工作，我将不胜感激。谢谢。

Answer 1

看看Android附带的Android的BluetoothChat示例。我觉得它能做你想做的事。

$ANDROID_SDK/samples/android-19/legacy/BluetoothChat/src/com/example/android/BluetoothChat

Answer 2

阅读管理连接部分。它清楚地写在文档中，如何通过蓝牙在设备之间交换(读/写)信息。http://developer.android.com/guide/topics/connectivity/bluetooth.html