BluetoothChat無效

Question

你好，我想在Android設備之間進行對話。我使用藍牙來做到這一點，但它不起作用，我無法正確讀取其他設備的數據。

交談是：

我：女貞

設備：P 設備：鉚釘

你能幫助我嗎？

私有類ConnectedThread擴展Thread {

private final InputStream mmInStream; 
    private final OutputStream mmOutStream; 

    public ConnectedThread(BluetoothSocket socket) { 
     Log.d(TAG, "create ConnectedThread"); 
     mmSocket = socket; 
     //InputStream tmpIn = null; 
     OutputStream tmpOut = null; 
     BufferedInputStream tmpIn=null; 

     int INPUT_BUFFER_SIZE=32; 
     // Get the BluetoothSocket input and output streams 
     try { 
      //tmpIn = socket.getInputStream(); 
      tmpOut = socket.getOutputStream(); 
      tmpIn = new BufferedInputStream(socket.getInputStream(),INPUT_BUFFER_SIZE); 

     } catch (IOException e) { 
      Log.e(TAG, "temp sockets not created", e); 
     } 

     mmInStream = tmpIn; 
     mmOutStream = tmpOut; 
    } 

    public void run() { 
     Log.i(TAG, "BEGIN mConnectedThread"); 
     byte[] buffer = new byte[1024]; 
     int bytes; 

     // Keep listening to the InputStream while connected 
     while (true) { 
      try { 
       // Read from the InputStream 

       bytes = mmInStream.read(buffer); 
       // Send the obtained bytes to the UI Activity 
       mHandler.obtainMessage(BluetoothChat.MESSAGE_READ, bytes, -1, buffer) 
         .sendToTarget(); 
      } catch (IOException e) { 
       Log.e(TAG, "disconnected", e); 
       connectionLost(); 
       break; 
      } 
     } 
    } 

Answer 1

用於溶液的修復是在所連接的線程創建字符串，調用read（）上的InputStream後直接，和然後使字符串回顯示主線程。無論出於何種原因，在線程之間傳遞字節數組導致重大重複和數據丟失。

修改的run（）代碼：

public void run() { 
    byte[] buffer = new byte[256]; // buffer store for the stream 
    int bytes; // bytes returned from read() 

    // Keep listening to the InputStream until an exception occurs 
    while (true) { 
     try { 
      // Read from the InputStream 
      bytes = mmInStream.read(buffer); 
      String readMessage = new String(buffer, 0, bytes); 
      // Send the obtained bytes to the UI Activity 
      mHandler.obtainMessage(MESSAGE_READ, bytes, -1, readMessage) 
        .sendToTarget(); 
     } catch (IOException e) { 
      break; 
     } 
    } 
} 

而且處理器接待：

case MESSAGE_READ: 
     // Read in string from message, display to mainText for user 
     String readMessage = (String) msg.obj; 
     if (msg.arg1 > 0) { 
      mainText.append(readMessage); 
     }