Android蓝牙发送文件问题

Question

我正在编写一个小程序，通过蓝牙在 Android 和 PC 之间发送文件。我已经 阅读 google android 网站中的蓝牙聊天示例。

目前，我的版本通过蓝牙发送短信效果非常好，但是当我发送一些文件时，大约> = 20 KB，它停止工作并抛出 EOFException ，如下所示：

java.io.EOFException at java.io.ObjectInputStream$BlockDataInputStream.readFully(ObjectInputStream.java:2716)
    at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1665)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1340)
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1963)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368)
    at com.test.pcserver.BluetoothServerListener.run(BluetoothServerListener.java:74)
    at java.lang.Thread.run(Thread.java:636)

目前，我在 PC 上的 java 程序使用 bluecove-2.1.0

这是我的主要代码：

在Android中：

// Get the BLuetoothDevice object
if (BluetoothAdapter.checkBluetoothAddress(address)) {
    device = mBtAdapter.getRemoteDevice(address);

        // Get a BluetoothSocket for a connection with the
    // given BluetoothDevice
    socket = device .createRfcommSocketToServiceRecord(ProgramConstants.BLUETOOTH_UUID);
    socket.connect();

        out = new ObjectOutputStream(socket.getOutputStream());

    // Send it to PC
    out.writeObject(contentObject);
    out.flush();        
}

在我的PC中，我读到：

PC版本，服务器

StreamConnectionNotifier streamConnNotifier = null;

// Create the service url
String connectionString = "btspp://localhost:" + ProgramConstants.BLUETOOTH_UUID.toString()
                    + ";name=myappname";
// open server url
streamConnNotifier = (StreamConnectionNotifier) Connector.open(connectionString);

while (true) {
  // Wait for client connection
  StreamConnection connection = streamConnNotifier.acceptAndOpen();
  ObjectInputStream in = new ObjectInputStream(connection.openInputStream());
  RemoteDevice dev = RemoteDevice.getRemoteDevice(connection);

  // read string from spp client
  DataInController data = new DataInController(model);
  data.processDataIn(in.readObject(), dev.getBluetoothAddress());   
}

Answer 1

您需要在刷新输出流后添加，

out.close();

否则流可能会损坏。