我正在调整Google的BluetoothChat示例中的代码,其中一个简单的线程是从蓝牙设备读取输入流。
大多数时候,我似乎永远都会不断地从设备中读取字节。但是,有时几轮之后读数就会停止。
08-15 17:09:28.123: E/BluetoothCommService(19749): disconnected
08-15 17:09:28.123: E/BluetoothCommService(19749): java.io.IOException: Software caused connection abort
08-15 17:09:28.123: E/BluetoothCommService(19749): at android.bluetooth.BluetoothSocket.readNative(Native Method)
08-15 17:09:28.123: E/BluetoothCommService(19749): at android.bluetooth.BluetoothSocket.read(BluetoothSocket.java:388)
08-15 17:09:28.123: E/BluetoothCommService(19749): at android.bluetooth.BluetoothInputStream.read(BluetoothInputStream.java:96)
08-15 17:09:28.123: E/BluetoothCommService(19749): at java.io.InputStream.read(InputStream.java:163)
08-15 17:09:28.123: E/BluetoothCommService(19749): at org.projectproto.yuscope.BluetoothCommService$ConnectedThread.run(BluetoothCommService.java:406)
从蓝牙设备读取数据的线程:
public class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket) {
Log.d(TAG, "create ConnectedThread");
mmSocket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;
// Get the BluetoothSocket input and output streams
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) {
Log.e(TAG, "temp sockets not created", e);
}
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
Log.i(TAG, "BEGIN mConnectedThread");
int bufSize = 5;
byte[] buffer = new byte[bufSize];
//Number of bytes read into the buffer return by mmInStream.read()
int bytesReceived = 0;
// Keep listening to the InputStream while connected
while (true) {
try {
// Read from the InputStream
bytesReceived = mmInStream.read(buffer);//this is line 406 where the exception is caught
// Send the obtained bytes to the UI Activity
if (bytesReceived>-1) {
mHandler.obtainMessage(MyUIAactivity.MESSAGE_READ, bytesReceived, -1, buffer).sendToTarget();
}
} catch (IOException e) {
Log.e(TAG, "disconnected", e);
connectionLost();
// Start the service over to restart listening mode
BluetoothCommService.this.start();
break;
} catch (Exception e) {
Log.e(TAG, "some weird exception thrown", e);
}
}
}
更新
在发布我自己之前,我显然已经阅读了this question。我的问题有一个非常具体的背景(Android手机和一些支持蓝牙2.0的健康设备之间的通信),这与其他问题不同。此外,微软的文章提到那里根本没有帮助我,更不用说Stackoverflow本身的答案对我来说不清楚。