如何在多個活動中使用連接線程

Question

我是Android的新手。 首先，我編寫了一個應用程序，該應用程序通過藍牙連接到另一台設備，然后使用套接字和連接的線程發送和接收數據。 使用一項活動時，一切工作正常，我使用處理程序接收數據。 然后，我開始制作具有多個活動的應用程序，因此為套接字連接和連接線程創建了一個特殊的類。 我通常從任何活動發送數據，但我不知道如何接收答案（如何在許多活動中創建處理程序，或使用什么替代方法）。 您能幫我寫這行代碼嗎，我應該補充一下。

謝謝。

這是我的主題：

private class ConnectedThread extends Thread {
    private final BluetoothSocket mmSocket;
    private final InputStream mmInStream;
    private final OutputStream mmOutStream;

    public ConnectedThread(BluetoothSocket socket) {
          mmSocket = socket;
          InputStream tmpIn = null;
          OutputStream tmpOut = null;

          try {
            tmpIn = socket.getInputStream();
            tmpOut = socket.getOutputStream();
          }
          catch (IOException e) {}

            mmInStream = tmpIn;
            mmOutStream = tmpOut;
          }
          public void run() {
            byte[] buffer = new byte[256];
            int bytes;
            while(true) {
              try {
                bytes = mmInStream.read(buffer);

                byte[] readBuf = (byte[]) buffer;
                String strIncom = new String(readBuf, 0, bytes);

                  // Here I need some method to send data to activity
              }
              catch (IOException e) {
                  break;
                }
              }
            }

              public void write(String message) { 
            byte[] msgBuffer = message.getBytes();
                try {
                    mmOutStream.write(msgBuffer);
                } catch (IOException e) {

                  }

          }

}

Answer 1

好吧，您可以做的一件事就是使用Interface ，

例如：

public class ConnectedThread extends Thread {
// You declare your interface in the Class body
    public static interface CallBackListener
    {
        public void onReceived(String msg);
    }

   private final BluetoothSocket mmSocket;
   private final InputStream mmInStream;
   private final OutputStream mmOutStream;
   private CallBackListener listener = null;

// then, those who want to use this class must implement 
// this interface
   public ConnectedThread(BluetoothSocket socket, CallBackListener aListener) 
   {        
         this.listener = aListener;
         ... 

在線程的run方法中，您可以這樣做：

// Here I need some method to send data to activity
if (listener != null)
{
   listener.onReceived(strIncom);
}

創建類時，請執行以下操作：

BluetoothSocket socket = null;
/*
* Create the BlueToothSocket here
   BluetoothSocket socket = new BluetoothSocket(...);
*/

ConnectedThread conThread = new ConnectedThread(socket, new ConnectedThread.CallBackListener()
{
   @Override
   public void onReceived(String msg)
   {
    // here you'll receive the string msg
    // keep in mind that you receive this call 
    // in the ConnectedThread's context, not the UI thread
   }
});