BufferedWriter 不会将所有数据写入 BluetoothSocket

Question

我编写了一个在 BluetoothSocket 中写入的方法，但它并没有写入所有内容。

public static String BluetoothPrint(String cFichero, String cMAC){

String cFail = "Fail";

try{
    BluetoothAdapter oBluetoothAdapter  = BluetoothAdapter.getDefaultAdapter();
    BluetoothDevice  oDispositivo       = oBluetoothAdapter.getRemoteDevice(cMAC);

    cFail = "Fail socket";      

    Method          oMethod = oDispositivo.getClass().getMethod("createRfcommSocket",new Class[] { int.class });
    BluetoothSocket     oSocket = (BluetoothSocket) oMethod.invoke(oDispositivo, Integer.valueOf(1));
    oSocket.connect();

    cFail = "Fail getOutput";

    BufferedWriter oStream = new BufferedWriter(new OutputStreamWriter(oSocket.getOutputStream(), "ISO-8859-1"));

    cFail = "Fail write";

    oStream.flush();
    oStream.write(cFichero,0,cFichero.length());
    oStream.close();

    oSocket.close()

}catch(Exception e){return cFail;}
return "ok";}

这个方法有大小限制吗？我尝试写入的文件大小为 5,37KB

Answer 1

我终于找到了答案。问题是套接字'oSocket'的缓冲区。 我重写了我的方法以分块发送数据并等待。

public static String BluetoothPrint(String cFichero, String cMAC)
{
String cFail = "Fail";
byte oByte;
byte[] msg = cFichero.getBytes();

try{
    BluetoothAdapter oBluetoothAdapter  = BluetoothAdapter.getDefaultAdapter();
    BluetoothDevice  oDispositivo       = oBluetoothAdapter.getRemoteDevice(cMAC);

    cFail = "Fail socket";      

    Method oMethod = oDispositivo.getClass().getMethod("createRfcommSocket",new Class[] { int.class });
    BluetoothSocket oSocket = (BluetoothSocket) oMethod.invoke(oDispositivo, Integer.valueOf(1));
    oSocket.connect();

    cFail = "Fail getOutput";

    BufferedOutputStream(oSocket.getOutputStream());
    BufferedOutputStream btoutputstream = new BufferedOutputStream(oSocket.getOutputStream(),512);

    cFail = "Fail write";

    int off = 0;

    while(off < msg.length){

        btoutputstream.write(msg,off,64);
        btoutputstream.flush();

        Thread.sleep(600);

        off += 64; 
    }

    btoutputstream.close();
    oSocket.close();

}catch(Exception e){return cFail;}

return "ok";
}