我想将实时加速度计数据从我的Android手机发送到我的笔记本电脑，这样我就可以使用这些数据进行进一步分析，但我这样做面临一些挑战...我无法坚持连接在机器人方面得到
W/BluetoothAdapter: getBluetoothService() called with no BluetoothManagerCallback
03-20 23:30:19.881 10050-13445/com.accel.bluetoothconnect W/System.err: java.io.IOException: read failed, socket might closed or timeout, read ret: -1
03-20 23:30:19.881 10050-13445/com.accel.bluetoothconnect W/System.err: at android.bluetooth.BluetoothSocket.readAll(BluetoothSocket.java:1016)
03-20 23:30:19.881 10050-13445/com.accel.bluetoothconnect W/System.err: at android.bluetooth.BluetoothSocket.waitSocketSignal(BluetoothSocket.java:973)
03-20 23:30:19.881 10050-13445/com.accel.bluetoothconnect W/System.err: at android.bluetooth.BluetoothSocket.connect(BluetoothSocket.java:662)
03-20 23:30:19.881 10050-13445/com.accel.bluetoothconnect W/System.err: at com.accel.bluetoothconnect.MainActivity$ConnectingThread.run(MainActivity.java:446)
03-20 23:30:19.951 10050-10050/com.accel.bluetoothconnect W/Accel Value(X)->: 0.0
03-20 23:30:19.951 10050-10050/com.accel.bluetoothconnect W/Accel Value(Y)->: 0.0
03-20 23:30:19.951 10050-10050/com.accel.bluetoothconnect W/Accel Value(Z)->: 10.289082
03-20 23:30:20.151 10050-10050/com.accel.bluetoothconnect W/Accel Value(X)->: 0.0
03-20 23:30:20.151 10050-10050/com.accel.bluetoothconnect W/Accel Value(Y)->: 0.0
03-20 23:30:20.151 10050-10050/com.accel.bluetoothconnect W/Accel Value(Z)->: 10.271125
03-20 23:30:20.351 10050-10050/com.accel.bluetoothconnect W/Accel Value(X)->: 0.0
03-20 23:30:20.351 10050-10050/com.accel.bluetoothconnect W/Accel Value(Y)->: 0.0
03-20 23:30:20.351 10050-10050/com.accel.bluetoothconnect W/Accel Value(Z)->: 10.289082
然而，在运行bluecove代码的笔记本电脑端，它能够连接并且线程等待数据。
BlueCove version 2.1.1-SNAPSHOT on winsock
0000110100001000800000805f9b34fb
waiting for connection...
waiting for connection...
waiting for input
finish process
我正在使用的代码，
对于Android -
public class MainActivity extends Activity implements SensorEventListener {
private final static UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");
private static final String TAG="BluetoothConnector";
private static final int REQUEST_ENABLE_BT = 1;
private static final int DISCOVERABLE_BT_REQUEST_CODE = 2;
private static final int DISCOVERABLE_DURATION = 300;
public static final int EXIT_CMD = -1;
int conn_flag = 0;
private Button onBtn;
private Button offBtn;
private Button listBtn;
private Button findBtn;
private TextView text;
private BluetoothAdapter myBluetoothAdapter;
private Set<BluetoothDevice> pairedDevices;
private ListView myListView;
private ArrayAdapter<String> BTArrayAdapter;
BluetoothDevice bluetoothDevice;
private float lastX, lastY, lastZ;
private SensorManager sensorManager;
private Sensor accelerometer;
private float deltaXMax = 0;
private float deltaYMax = 0;
private float deltaZMax = 0;
private float deltaX = 0;
private float deltaY = 0;
private float deltaZ = 0;
private float vibrateThreshold = 0;
private TextView currentX, currentY, currentZ, maxX, maxY, maxZ;
public Vibrator v;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// take an instance of BluetoothAdapter - Bluetooth radio
myBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if(myBluetoothAdapter == null) {
onBtn.setEnabled(false);
offBtn.setEnabled(false);
listBtn.setEnabled(false);
findBtn.setEnabled(false);
text.setText("Status: not supported");
Toast.makeText(getApplicationContext(),"Your device does not support Bluetooth",
Toast.LENGTH_LONG).show();
} else {
text = (TextView) findViewById(R.id.text);
onBtn = (Button)findViewById(R.id.turnOn);
onBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
on(v);
}
});
offBtn = (Button)findViewById(R.id.turnOff);
offBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
off(v);
}
});
listBtn = (Button)findViewById(R.id.paired);
listBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
list(v);
}
});
findBtn = (Button)findViewById(R.id.search);
findBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
find(v);
}
});
myListView = (ListView)findViewById(R.id.listView1);
// create the arrayAdapter that contains the BTDevices, and set it to the ListView
BTArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1);
myListView.setAdapter(BTArrayAdapter);
myListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// ListView Clicked item value
String itemValue = (String) myListView.getItemAtPosition(position);
String MAC = itemValue.substring(itemValue.length() - 17);
bluetoothDevice = myBluetoothAdapter.getRemoteDevice(MAC);
// Initiate a connection request in a separate thread
ConnectingThread t = new ConnectingThread(bluetoothDevice);
t.start();
}
});
}
sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
if (sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER) != null) {
// success! we have an accelerometer
accelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
sensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
vibrateThreshold = accelerometer.getMaximumRange() / 2;
} else {
// fai! we dont have an accelerometer!
}
//initialize vibration
v = (Vibrator) this.getSystemService(Context.VIBRATOR_SERVICE);
}
public void on(View view){
if (!myBluetoothAdapter.isEnabled()) {
Intent turnOnIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(turnOnIntent, REQUEST_ENABLE_BT);
Toast.makeText(getApplicationContext(),"Bluetooth turned on" ,
Toast.LENGTH_LONG).show();
}
else{
Toast.makeText(getApplicationContext(),"Bluetooth is already on",
Toast.LENGTH_LONG).show();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
if(requestCode == REQUEST_ENABLE_BT){
if(myBluetoothAdapter.isEnabled()) {
text.setText("Status: Enabled");
Toast.makeText(getApplicationContext(), "Ha! Bluetooth is now enabled." +
"\n" + "Scanning for remote Bluetooth devices...",
Toast.LENGTH_SHORT).show();
// To discover remote Bluetooth devices
discoverDevices();
// Make local device discoverable by other devices
makeDiscoverable();
// Start a thread to create a server socket to listen
// for connection request
ListeningThread t = new ListeningThread();
t.start();
} else {
text.setText("Status: Disabled");
}
}else if (requestCode == DISCOVERABLE_BT_REQUEST_CODE){
if (resultCode == DISCOVERABLE_DURATION){
Toast.makeText(getApplicationContext(), "Your device is now discoverable by other devices for " +
DISCOVERABLE_DURATION + " seconds",
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "Fail to enable discoverability on your device.",
Toast.LENGTH_SHORT).show();
}
}
}
protected void discoverDevices(){
// To scan for remote Bluetooth devices
if (myBluetoothAdapter.startDiscovery()) {
Toast.makeText(getApplicationContext(), "Discovering other bluetooth devices...",
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "Discovery failed to start.",
Toast.LENGTH_SHORT).show();
}
}
protected void makeDiscoverable(){
// Make local device discoverable
Intent discoverableIntent = new
Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, DISCOVERABLE_DURATION);
startActivityForResult(discoverableIntent, DISCOVERABLE_BT_REQUEST_CODE);
}
public void list(View view){
// get paired devices
pairedDevices = myBluetoothAdapter.getBondedDevices();
// put it's one to the adapter
for(BluetoothDevice device : pairedDevices)
BTArrayAdapter.add(device.getName()+ "\n" + device.getAddress());
Toast.makeText(getApplicationContext(),"Show Paired Devices",
Toast.LENGTH_SHORT).show();
}
final BroadcastReceiver bReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
// When discovery finds a device
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
// Get the BluetoothDevice object from the Intent
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
// add the name and the MAC address of the object to the arrayAdapter
BTArrayAdapter.add(device.getName() + "\n" + device.getAddress());
BTArrayAdapter.notifyDataSetChanged();
}
else if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)) {
conn_flag=1;
}
}
};
public void find(View view) {
if (myBluetoothAdapter.isDiscovering()) {
// the button is pressed when it discovers, so cancel the discovery
myBluetoothAdapter.cancelDiscovery();
}
else {
BTArrayAdapter.clear();
myBluetoothAdapter.startDiscovery();
registerReceiver(bReceiver, new IntentFilter(BluetoothDevice.ACTION_FOUND));
}
}
public void off(View view){
myBluetoothAdapter.disable();
text.setText("Status: Disconnected");
Toast.makeText(getApplicationContext(),"Bluetooth turned off",
Toast.LENGTH_LONG).show();
}
@Override
protected void onResume() {
super.onResume();
sensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
// Register the BroadcastReceiver for ACTION_FOUND
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
this.registerReceiver(bReceiver, filter);
}
@Override
protected void onPause() {
super.onPause();
sensorManager.unregisterListener(this);
this.unregisterReceiver(bReceiver);
}
@Override
public void onSensorChanged(SensorEvent event) {
Log.w("Accel Value(X)->", String.valueOf(deltaX));
Log.w("Accel Value(Y)->", String.valueOf(deltaY));
Log.w("Accel Value(Z)->", String.valueOf(deltaZ));
if(conn_flag == 1) {
Log.w("Data Transfer", "Finally transferring data");
ConnectingThread ct = new ConnectingThread(bluetoothDevice);
ct.write((int) deltaX);
}
// get the change of the x,y,z values of the accelerometer
deltaX = Math.abs(lastX - event.values[0]);
deltaY = Math.abs(lastY - event.values[1]);
deltaZ = Math.abs(lastZ - event.values[2]);
// if the change is below 2, it is just plain noise
if (deltaX < 2)
deltaX = 0;
if (deltaY < 2)
deltaY = 0;
if ((deltaZ > vibrateThreshold) || (deltaY > vibrateThreshold) || (deltaZ > vibrateThreshold)) {
v.vibrate(50);
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
private class ListeningThread extends Thread {
private final BluetoothServerSocket bluetoothServerSocket;
public ListeningThread() {
BluetoothServerSocket temp = null;
try {
temp = myBluetoothAdapter.listenUsingRfcommWithServiceRecord(getString(R.string.app_name), uuid);
} catch (IOException e) {
e.printStackTrace();
}
bluetoothServerSocket = temp;
}
public void run() {
BluetoothSocket bluetoothSocket;
// This will block while listening until a BluetoothSocket is returned
// or an exception occurs
while (true) {
try {
bluetoothSocket = bluetoothServerSocket.accept();
} catch (IOException e) {
break;
}
// If a connection is accepted
if (bluetoothSocket != null) {
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(), "A connection has been accepted.",
Toast.LENGTH_SHORT).show();
}
});
// Code to manage the connection in a separate thread
/*
manageBluetoothConnection(bluetoothSocket);
*/
try {
bluetoothServerSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
break;
}
}
}
// Cancel the listening socket and terminate the thread
public void cancel() {
try {
bluetoothServerSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private class ConnectingThread extends Thread {
private BluetoothSocket bluetoothSocket;
private final BluetoothDevice bluetoothDevice;
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectingThread(BluetoothDevice device) {
BluetoothSocket temp = null;
bluetoothDevice = device;
// Get a BluetoothSocket to connect with the given BluetoothDevice
try {
temp = bluetoothDevice.createRfcommSocketToServiceRecord(uuid);
} catch (IOException e) {
e.printStackTrace();
}
bluetoothSocket = temp;
InputStream tmpIn = null;
OutputStream tmpOut = null;
// Get the BluetoothSocket input and output streams
try {
tmpIn = bluetoothSocket.getInputStream();
tmpOut = bluetoothSocket.getOutputStream();
} catch (IOException e) {
Log.e(TAG, "temp sockets not created", e);
}
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
myBluetoothAdapter.cancelDiscovery();
try {
// This will block until it succeeds in connecting to the device
// through the bluetoothSocket or throws an exception
bluetoothSocket.connect();
} catch (IOException connectException) {
connectException.printStackTrace();
try {
Log.e("","trying fallback...");
bluetoothSocket =(BluetoothSocket) bluetoothDevice.getClass().getMethod("createRfcommSocket", new Class[] {int.class}).invoke(bluetoothDevice,1);
bluetoothSocket.connect();
Log.e("","Connected");
}
catch (Exception e2) {
Log.e("", "Couldn't establish Bluetooth connection!");
}
}
}
public void write(int out) {
try {
mmOutStream.write(out);
} catch (IOException e) {
Log.e(TAG, "Exception during write", e);
}
}
// Cancel an open connection and terminate the thread
public void cancel() {
try {
mmOutStream.write(EXIT_CMD);
bluetoothSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}}
Android清单 -
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission android:name="android.permission.VIBRATE" />
对于后备代码，我提到了 - getBluetoothService() called with no BluetoothManagerCallback for Android Nexus 5
和笔记本电脑方面（bluecove） -
WaitThread.java -
public class WaitThread implements Runnable{
/** Constructor */
public WaitThread() {
}
@Override
public void run() {
waitForConnection();
}
/** Waiting for connection from devices */
private void waitForConnection() {
// retrieve the local Bluetooth device object
LocalDevice local = null;
StreamConnectionNotifier notifier;
StreamConnection connection = null;
// setup the server to listen for connection
try {
local = LocalDevice.getLocalDevice();
local.setDiscoverable(DiscoveryAgent.GIAC);
//UUID uuid = new UUID("04c6093b00001000800000805f9b34fb", false);
UUID uuid = new UUID("0000110100001000800000805f9b34fb", false);
System.out.println(uuid.toString());
String url = "btspp://localhost:" + uuid.toString() + ";name=RemoteBluetooth";
notifier = (StreamConnectionNotifier)Connector.open(url);
} catch (BluetoothStateException e) {
System.out.println("Bluetooth is not turned on.");
e.printStackTrace();
return;
} catch (IOException e) {
e.printStackTrace();
return;
}
// waiting for connection
while(true) {
try {
System.out.println("waiting for connection...");
connection = notifier.acceptAndOpen();
Thread processThread = new Thread(new ProcessConnectionThread(connection));
processThread.start();
} catch (Exception e) {
e.printStackTrace();
return;
}
}
}
}
和ProcessConnectionThread.java -
public class ProcessConnectionThread implements Runnable{
private StreamConnection mConnection;
// Constant that indicate command from devices
private static final int EXIT_CMD = -1;
private static final int KEY_RIGHT = 1;
private static final int KEY_LEFT = 2;
public ProcessConnectionThread(StreamConnection connection)
{
mConnection = connection;
}
@Override
public void run() {
try {
// prepare to receive data
InputStream inputStream = mConnection.openInputStream();
System.out.println("waiting for input");
while (true) {
int command = inputStream.read();
if (command == EXIT_CMD)
{
System.out.println("finish process");
break;
}
processCommand(command);
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Process the command from client
* @param command the command code
*/
private void processCommand(int command) {
try {
System.out.println("Value sent is: "+command);
} catch (Exception e) {
e.printStackTrace();
}
}
}
现在我只是想在int中传递x轴数据（暂时）。请帮我解决。此外，这是我的第一个Android应用程序，我试图连接各种网站的作品，所以请求大家请轻松与我。