アンドロイドブルートゥース時には接続しないでください

Question

I行う既にペアリングデバイスに接続するには、次

private boolean tryConnectDifferentUuid() { 

    ParcelUuid[] supportedUuids = mDevice.getUuids(); 

    if (supportedUuids != null){ 
     for (ParcelUuid Uuid : supportedUuids) { 
      if (connectSecureRfCom(Uuid.toString())) { 
       return true; 
      } else if (connectInsecureRfCom(Uuid.toString())) { 
       return true; 
      } 
     } 
    } 
    return false; 
} 


private boolean connectSecureRfCom(String UuidString) { 
    try { 
     Log.d(TAG_BT, "connectSecureRfCom "); 
     mmSocket = mDevice.createRfcommSocketToServiceRecord(UUID.fromString(UuidString)); 
     mmSocket.connect(); 
     Log.d(TAG_BT, "Connected"); 
     return true; 
    } catch (Exception e) { 
     Log.e(TAG_BT, "Couldn't establish Bluetooth connection!", e); 
     return false; 
    } 
} 

private boolean connectInsecureRfCom(String UuidString) { 
    try { 
     Log.d(TAG_BT, "connectInsecureRfCom "); 
     mmSocket = mDevice.createInsecureRfcommSocketToServiceRecord(UUID.fromString(UuidString)); 
     mmSocket.connect(); 
     Log.d(TAG_BT, "Connected"); 
     return true; 
    } catch (Exception e) { 
     Log.e(TAG_BT, "Couldn't establish Bluetooth connection!", e); 
     return false; 
    } 
} 

private boolean connectCreateRfcommSocket() { 
    try { 
     Log.d(TAG_BT, "connectSecureRfComInvoke "); 


     mmSocket =(BluetoothSocket) mDevice.getClass().getMethod("createRfcommSocket", new Class[] {int.class}).invoke(mDevice,1); 
     mmSocket.connect(); 

     Log.d(TAG_BT, "Connected"); 

     return true; 

    } catch (Throwable e) { 
     Log.e(TAG_BT, "Couldn't establish Bluetooth connection!", e); 
     return false; 
    } 
} 

private boolean connectCreateRfcommSocketToServiceRecordInvoke() { 
    try { 
     Log.d(TAG_BT, "createRfcommSocketToServiceRecord "); 

     mmSocket =(BluetoothSocket) mDevice.getClass().getMethod("createRfcommSocketToServiceRecord", new Class[] {int.class}).invoke(mDevice,1); 
     mmSocket.connect(); 

     Log.d(TAG_BT, "Connected"); 

     return true; 

    } catch (Throwable e) { 
     Log.e(TAG_BT, "Couldn't establish Bluetooth connection!", e); 
     return false; 
    } 
} 

問題は、それが時々ある：ここでは

 if (connectCreateRfcommSocketToServiceRecordInvoke()) { 
      Log.d(TAG_BT, "Connection created 1"); 
      connected = true; 
     } else if (connectCreateRfcommSocket()) { 
      Log.d(TAG_BT, "Connection created 2"); 
      connected = true; 
     } else if (connectSecureRfCom(UUID_DEFAULT)) { 
      Log.d(TAG_BT, "Connection created 3"); 
      connected = true; 
     } else if (connectInsecureRfCom(UUID_DEFAULT)) { 
      Log.d(TAG_BT, "Connection created 4"); 
      connected = true; 
     }else if (tryConnectDifferentUuid()) { 
      Log.d(TAG_BT, "Connection created 5"); 
      connected = true; 
     } 

が呼び出される関数の定義でありますアプリケーションを開いたり閉じたり、Bluetoothを接続/切断したりしても何度も連続して動作しますが、次の出力ではうまく動作しません：

java.io.IOException: read failed, socket might closed or timeout, read ret: -1 

Answer 1

読み取りや書き込みが見つからない場合、しばらくするとソケットが閉じられたりタイムアウトしたりします。無限ループのある別のスレッドでソケットを使用する必要があります。

public class Client extends(Thread or AsyncTask or Runnable){ 
    public void startConnection(){socket.connect(); isConnected = socket.isConnected();} 

    private void listenSocket(){ 
    while(isConnected){ listening process }} 

    public void stopConnection(){thread.cancel(); isConnected = false;} 

}