我在调试器中查看，但我看不出有什么问题。
public class MainActivity extends Activity implements OnItemClickListener{
public BluetoothAdapter BtAdaptor;
public ArrayAdapter<String> listAdaptor;
public ArrayList<String> PairedDevices;
public ArrayList<BluetoothDevice> devices;
public ListView Lista;
public Set<BluetoothDevice> DevicesArray;
public IntentFilter filter;
public BroadcastReceiver receiver;
public static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
protected static final int SUCCES_CONNECT = 0;
public static final int MESSAGE_READ = 1;
public static final int MESSAGE_PRINTED = 2;
public Handler mHandler;
public InputStream mmInStream;
public OutputStream mmOutStream;
public ConnectedThread connectedThread;
public BluetoothDevice selectedDevice;
public BluetoothSocket mmSocket;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button scaneaza = (Button)findViewById(R.id.btnScan);
Button printeaza = (Button)findViewById(R.id.btnSend);
printeaza.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
ConnectThread connect = new ConnectThread(selectedDevice);
connect.start();
}
});
scaneaza.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// Lista.setAdapter(listAdaptor);
startDiscovery();
if(devices.size()!=0){
listAdaptor.clear();
listAdaptor.notifyDataSetChanged();
}
receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if(BluetoothDevice.ACTION_FOUND.equals(action)){
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
listAdaptor.add(device.getName()+" \n "+device);
devices.add(device);
}
else if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){
Toast.makeText(getApplicationContext(), "S-a terminat cautarea!", Toast.LENGTH_SHORT).show();
}
}
};
registerReceiver(receiver, filter);
IntentFilter filter2 = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(receiver, filter2);
}
});
BtAdaptor = BluetoothAdapter.getDefaultAdapter();
initiere();
if(BtAdaptor == null){
Toast.makeText(getApplicationContext(), "Dispozitivul nu are Bt", 0).show();
}
else {
if(!BtAdaptor.isEnabled()){
Intent PornesteBt = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
Intent DescoperaBt = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
startActivityForResult(PornesteBt,1);
DescoperaBt.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 120);
startActivity(DescoperaBt);
startDiscovery();
}
else {}
}
mHandler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch(msg.what){
case SUCCES_CONNECT:
connectedThread = new ConnectedThread((BluetoothSocket)msg.obj);
Toast.makeText(getApplicationContext(), "Connected", Toast.LENGTH_SHORT).show();
String s="\n Mesaj trimis pt a testa.";
connectedThread.write(s.getBytes());
break;
case MESSAGE_PRINTED:
connectedThread = new ConnectedThread((BluetoothSocket)msg.obj);
connectedThread.cancel();
break;
}
}
};
}
private void startDiscovery() {
BtAdaptor.cancelDiscovery();
BtAdaptor.startDiscovery();
}
private void initiere() {
ListView Lista = (ListView)findViewById(R.id.lView);
Lista.setOnItemClickListener(this);
listAdaptor = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,0);
Lista.setAdapter(listAdaptor);
PairedDevices = new ArrayList<String>();
filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
devices = new ArrayList<BluetoothDevice>();
}
@Override
protected void onDestroy() {
super.onPause();
unregisterReceiver(receiver);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
if(BtAdaptor.isDiscovering()){
BtAdaptor.cancelDiscovery();
}
Toast.makeText(getApplicationContext(), "device selectat", 0).show();
// Object[] o= DevicesArray.toArray();
// BluetoothDevice selectedDevice = (BluetoothDevice)o[arg2];
selectedDevice = devices.get(arg2);
}
我使用了来自http://developer.android.com/guide/topics/connectivity/bluetooth.html的 ConnectThread 活动
private class ConnectThread extends Thread {
// public BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
public ConnectThread(BluetoothDevice device) {
// Use a temporary object that is later assigned to mmSocket,
// because mmSocket is final
// BluetoothSocket tmp = null;
mmDevice = device;
// Get a BluetoothSocket to connect with the given BluetoothDevice
try {
// MY_UUID is the app's UUID string, also used by the server code
mmSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) { }
// mmSocket = tmp;
}
public void run() {
// Cancel discovery because it will slow down the connection
BtAdaptor.cancelDiscovery();
try {
// Connect the device through the socket. This will block
// until it succeeds or throws an exception
mmSocket.connect();
} catch (IOException connectException) {
// Unable to connect; close the socket and get out
try {
mmSocket.close();
} catch (IOException closeException) { }
return;
}
// Do work to manage the connection (in a separate thread)
// manageConnectedSocket(mmSocket);
mHandler.obtainMessage(SUCCES_CONNECT,mmSocket).sendToTarget();
}
/** Will cancel an in-progress connection, and close the socket */
public void cancel() {
Toast.makeText(getApplicationContext(), "A intrat in cancel ", Toast.LENGTH_SHORT).show();
if(mmSocket != null){
try {
mmSocket.close();
} catch (IOException e) { }
}
}
}
And ConnectedThread... private class ConnectedThread extends Thread { // private final BluetoothSocket mmSocket;
public ConnectedThread(BluetoothSocket socket) {
mmSocket = socket;
// InputStream tmpIn;
// OutputStream tmpOut;
try {
// tmpIn = socket.getInputStream();
mmInStream = socket.getInputStream();
// tmpOut = socket.getOutputStream();
mmOutStream = socket.getOutputStream();
} catch (IOException e) { }
// mmInStream = tmpIn;
// mmOutStream = tmpOut;
}
public void run() {
byte[] buffer ; // buffer store for the stream
int bytes; // bytes returned from read()
// Keep listening to the InputStream until an exception occurs
while (true) {
try {
buffer = new byte[1024];
// Read from the InputStream
bytes = mmInStream.read(buffer);
// Send the obtained bytes to the UI activity
mHandler.obtainMessage(MESSAGE_READ, bytes, -1, buffer).sendToTarget();
} catch (IOException e) {
break;
}
}
}
/* Call this from the main activity to send data to the remote device */
public void write(byte[] bytes) {
try {
mHandler.obtainMessage(MESSAGE_PRINTED).sendToTarget();
mmOutStream.write(bytes);
} catch (IOException e) { }
}
/* Call this from the main activity to shutdown the connection */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
}
}
我只想作为客户端连接。谢谢。