[英]Android Bluetooth sending file problem
I am writing a small program to send file between Android and PC through bluetooth. 我正在编写一个小程序,通过蓝牙在Android和PC之间发送文件。 I already read the bluetooth chat example in google android site.
我已经阅读了谷歌android站点中的蓝牙聊天示例。
Currently, my version works really well with sending a text message via bluetooth, but when I send some files, around >= 20 KB, it stops working and throwing EOFException as below: 目前,我的版本通过蓝牙发送文本消息非常有效,但是当我发送一些文件时,大约> = 20 KB,它会停止工作并抛出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)
Currently, my java program on the PC using bluecove-2.1.0
目前,我的PC上的java程序使用的是
bluecove-2.1.0
Here are my main codes: 这是我的主要代码:
In Android: 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();
}
In My PC, I read it: 在我的电脑中,我读到它:
PC Version, server PC版,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());
}
You need to add after flushing the outputstream 您需要在刷新输出流后添加
out.close();
otherwise the stream can become corrupted. 否则流可能会被破坏。
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