原理类似socket通信，必须有一个作为服务端，一个作为客户端。特别注意的两端的uuid必须相同。一下就是简单蓝牙聊天代码。源码下载地址：http://download.csdn.net/detail/cao185493676/9782519
1.客户端代码
package com.example.myblooth;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import android.os.Bundle;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements OnItemClickListener {
private BluetoothAdapter bAtapter;
private BluetoothDevice device;
private List<BluetoothDevice> deviceList = new ArrayList<BluetoothDevice>();
private List<String> nameList = new ArrayList<String>();
private ListView mListView;
private BluetoothSocket bs;
private EditText mEditText;
private StringBuilder incoming = new StringBuilder();
private TextView tv;
private BluetoothSocket transferSocket;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mEditText = (EditText) findViewById(R.id.et_id);
tv = (TextView) findViewById(R.id.tv_id);
initView();
}
public void click(View view) {
if (transferSocket != null) {
String str = mEditText.getText().toString();
sendMessage(transferSocket, "客户端说：" + str + "\n");
}
}
private void initView() {
// TODO Auto-generated method stub
bAtapter = BluetoothAdapter.getDefaultAdapter();
mListView = (ListView) findViewById(R.id.list_id);
mListView.setOnItemClickListener(this);
startDiscovery();
mListView.setAdapter(baseAdapter);
}
private void startDiscovery() {
// TODO Auto-generated method stub
registerReceiver(discoveryRsult, new IntentFilter(
BluetoothDevice.ACTION_FOUND));
deviceList.clear();
nameList.clear();
bAtapter.startDiscovery();
}
BroadcastReceiver discoveryRsult = new BroadcastReceiver() {
@Override
public void onReceive(Context arg0, Intent arg1) {
// TODO Auto-generated method stub
nameList.add(arg1.getStringExtra(BluetoothDevice.EXTRA_NAME));
deviceList.add((BluetoothDevice) arg1
.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE));
Log.i("caohaidemo", "nameList:" + nameList.size());
baseAdapter.notifyDataSetChanged();
}
};
BaseAdapter baseAdapter = new BaseAdapter() {
@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
arg1 = LayoutInflater.from(MainActivity.this).inflate(
R.layout.item, arg2, false);
TextView tv = (TextView) arg1.findViewById(R.id.item_text);
tv.setText(nameList.get(arg0));
return arg1;
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return nameList.get(arg0);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return nameList.size();
}
};
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
final BluetoothDevice device = deviceList.get(arg2);
new Thread() {
@Override
public void run() {
// TODO Auto-generated method stub
connectToServerSocket(device,
UUID.fromString("a60f35f0-b93a-11de-8a39-08002009c666"));
}
}.start();
}
private void connectToServerSocket(BluetoothDevice device, UUID uuid) {
try {
BluetoothSocket clientSocket = device
.createRfcommSocketToServiceRecord(uuid);
transferSocket = clientSocket;
// Block until server connection accepted.
clientSocket.connect();
runOnUiThread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this, "连接成功", Toast.LENGTH_LONG)
.show();
}
});
// Start listening for messages.
listenForMessages(clientSocket, incoming);
// Add a reference to the socket used to send messages.
} catch (IOException e) {
Log.e("BLUETOOTH", "Blueooth client I/O Exception", e);
}
}
private void sendMessage(BluetoothSocket socket, String message) {
OutputStream outStream;
try {
outStream = socket.getOutputStream();
// Add a stop character.
byte[] byteArray = (message + " ").getBytes();
byteArray[byteArray.length - 1] = 0;
outStream.write(byteArray);
} catch (IOException e) {
}
}
private boolean listening = false;
private void listenForMessages(BluetoothSocket socket,
final StringBuilder incoming) {
listening = true;
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
try {
InputStream instream = socket.getInputStream();
int bytesRead = -1;
while (listening) {
bytesRead = instream.read(buffer);
if (bytesRead != -1) {
String result = "";
while ((bytesRead == bufferSize)
&& (buffer[bufferSize - 1] != 0)) {
result = result + new String(buffer, 0, bytesRead - 1);
bytesRead = instream.read(buffer);
}
result = result + new String(buffer, 0, bytesRead - 1);
incoming.append(result);
Log.i("caohaidemo", "服务器说：" + incoming.toString());
runOnUiThread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
tv.setText(incoming.toString());
}
});
}
}
// socket.close();
} catch (IOException e) {
} finally {
}
}
}
2.服务端代码：
package com.example.mybloothserver;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;
import android.os.Bundle;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private EditText mEditText;
private StringBuffer sb;
private TextView tv;
private StringBuilder incoming = new StringBuilder();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mEditText = (EditText) findViewById(R.id.et_id);
sb = new StringBuffer();
tv = (TextView) findViewById(R.id.tv_id);
startServerSocket(BluetoothAdapter.getDefaultAdapter());
}
public void click(View view) {
if (transferSocket != null) {
String str = mEditText.getText().toString();
sendMessage(transferSocket, "服务器说：" + str + "\n");
}
}
private BluetoothSocket transferSocket;
private UUID startServerSocket(BluetoothAdapter bluetooth) {
UUID uuid = UUID.fromString("a60f35f0-b93a-11de-8a39-08002009c666");
String name = "bluetoothserver";
try {
final BluetoothServerSocket btserver = bluetooth
.listenUsingRfcommWithServiceRecord(name, uuid);
Thread acceptThread = new Thread(new Runnable() {
public void run() {
try {
// Block until client connection established.
final BluetoothSocket serverSocket = btserver.accept();
transferSocket = serverSocket;
runOnUiThread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this, "连接成功",
Toast.LENGTH_LONG).show();
}
});
// Start listening for messages.
listenForMessages(serverSocket, incoming);
// Add a reference to the socket used to send messages.
} catch (IOException e) {
Log.e("BLUETOOTH", "Server connection IO Exception", e);
}
}
});
acceptThread.start();
} catch (IOException e) {
Log.e("BLUETOOTH", "Socket listener IO Exception", e);
}
return uuid;
}
/**
* Listing 16-8: Sending and receiving strings using Bluetooth Sockets
*/
private void sendMessage(BluetoothSocket socket, String message) {
OutputStream outStream;
try {
outStream = socket.getOutputStream();
// Add a stop character.
byte[] byteArray = (message + " ").getBytes();
byteArray[byteArray.length - 1] = 0;
outStream.write(byteArray);
} catch (IOException e) {
}
}
private boolean listening = false;
private void listenForMessages(BluetoothSocket socket,
final StringBuilder incoming) {
listening = true;
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
try {
InputStream instream = socket.getInputStream();
int bytesRead = -1;
while (listening) {
bytesRead = instream.read(buffer);
if (bytesRead != -1) {
String result = "";
while ((bytesRead == bufferSize)
&& (buffer[bufferSize - 1] != 0)) {
result = result + new String(buffer, 0, bytesRead - 1);
bytesRead = instream.read(buffer);
}
result = result + new String(buffer, 0, bytesRead - 1);
incoming.append(result);
runOnUiThread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
tv.setText(incoming.toString());
}
});
}
// socket.close();
}
socket.close();
} catch (IOException e) {
} finally {
}
}
}