Android蓝牙打印的一段例程(未经验证)

droid手机 通过蓝牙怎么和蓝牙打印机建立连接啊 ！
package com.ea.test;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class Bluetooth_one extends Activity {
// Debugging
  private static final String TAG = "BluetoothChatService";
  private static final boolean D = true;
protected static final int REQUEST_ENABLE_BT = 0;
private Button open = null;
private Button find = null;
private Button conn = null;
private Button trans = null;
private BluetoothAdapter mBluetoothAdapter=null;
private int mState;

// Constants that indicate the current connection state
public static final int STATE_NONE = 0; // we're doing nothing
public static final int STATE_LISTEN = 1; // now listening for incoming connections
public static final int STATE_CONNECTING = 2; // now initiating an outgoing connection
public static final int STATE_CONNECTED = 3; // now connected to a remote device
// Unique UUID for this application
  private static final UUID MY_UUID = UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66");
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
open = (Button) findViewById(R.id.open);
find = (Button) findViewById(R.id.find);
conn = (Button) findViewById(R.id.conn);
trans = (Button) findViewById(R.id.trans);
addLisenner();
}

public void addLisenner() {
open.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
mBluetoothAdapter = BluetoothAdapter
.getDefaultAdapter();
if (mBluetoothAdapter == null) {
// Device does not support Bluetooth
showDialog(R.string.no_support);
} else {
if (!mBluetoothAdapter.isEnabled()) {
Intent enableBtIntent = new Intent(
BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent,
REQUEST_ENABLE_BT);
}else{

}
}
}
});
find.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
new AcceptThread().start();
}
});
conn.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
BluetoothDevice device=mBluetoothAdapter.getRemoteDevice("00:80:37:21:18:81");
new ConnectThread(device).start();
}
});

}
/**
  * This thread runs while listening for incoming connections. It behaves
  * like a server-side client. It runs until a connection is accepted
  * (or until cancelled).
  */
  private class AcceptThread extends Thread {
  // The local server socket
  private final BluetoothServerSocket mmServerSocket;

  public AcceptThread() {
  BluetoothServerSocket tmp = null;

  // Create a new listening server socket
  try {
  tmp = mBluetoothAdapter.listenUsingRfcommWithServiceRecord("ddd", MY_UUID);
  } catch (IOException e) {
  Log.e(TAG, "listen() failed", e);
  }
  mmServerSocket = tmp;
  }

  public void run() {
  if (D) Log.d(TAG, "BEGIN mAcceptThread" + this);
  setName("AcceptThread");
  BluetoothSocket socket = null;

  // Listen to the server socket if we're not connected
  while (mState != STATE_CONNECTED) {
  try {
  // This is a blocking call and will only return on a
  // successful connection or an exception
  socket = mmServerSocket.accept();
  } catch (IOException e) {
  Log.e(TAG, "accept() failed", e);
  break;
  }

  // If a connection was accepted
  if (socket != null) {
  synchronized (Bluetooth_one.this) {
  switch (mState) {
  case STATE_LISTEN:
  case STATE_CONNECTING:
  // Situation normal. Start the connected thread.
  // connected(socket, socket.getRemoteDevice());
  break;
  case STATE_NONE:
  case STATE_CONNECTED:
  // Either not ready or already connected. Terminate new socket.
  try {
  socket.close();
  } catch (IOException e) {
  Log.e(TAG, "Could not close unwanted socket", e);
  }
  break;
  }
  }
  }
  }
  if (D) Log.i(TAG, "END mAcceptThread");
  }

  public void cancel() {
  if (D) Log.d(TAG, "cancel " + this);
  try {
  mmServerSocket.close();
  } catch (IOException e) {
  Log.e(TAG, "close() of server failed", e);
  }
  }
  }
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (REQUEST_ENABLE_BT == requestCode) {
if (resultCode == RESULT_OK) {
// user open bluetooth
// mBluetoothAdapter.startDiscovery();
} else {
// user not open bluetooth
}
}
}

private class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;

public ConnectedThread(BluetoothSocket socket) {
mmSocket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;

// Get the input and output streams, using temp objects because
// member streams are final
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) { }

mmInStream = tmpIn;
mmOutStream = tmpOut;
}

public void run() {
byte[] buffer = new byte[1024]; // buffer store for the stream
int bytes; // bytes returned from read()

// Keep listening to the InputStream until an exception occurs
while (true) {
try {
// 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 {
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) { }
}
}

private class ConnectThread extends Thread {
private final 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
tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
e.printStackTrace();
}
mmSocket = tmp;
}

public void run() {
// Cancel discovery because it will slow down the connection
// mAdapter.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
connectException.printStackTrace();
try {
mmSocket.close();
} catch (IOException closeException) { }
return;
}

// Do work to manage the connection (in a separate thread)
// manageConnectedSocket(mmSocket);
}

/** Will cancel an in-progress connection, and close the socket */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
}
}

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