蓝牙客户端和服务器的实现
需要权限：
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />客户端：
package com.pax.btclient;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.bluetooth.*;
import android.os.ConditionVariable;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.UUID;
import java.util.Random;
public class MainActivity extends Activity {
private BluetoothAdapter adapter = null;
private BluetoothDevice remoteDevice = null;
private BluetoothSocket socket = null;
private ConditionVariable done = null;
private Activity activity = null;
private final static String TAG = "BTClient";
final UUID MyUUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
BluetoothStateChangeReceiver stateChangeReceiver;
BluetoothDiscoveryReciver discoveryReciver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
adapter = BluetoothAdapter.getDefaultAdapter();
done = new ConditionVariable();
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
stateChangeReceiver = new BluetoothStateChangeReceiver();
registerReceiver(stateChangeReceiver, filter);
IntentFilter discoveryFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
discoveryFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
discoveryFilter.addAction(BluetoothDevice.ACTION_PAIRING_REQUEST);
discoveryReciver = new BluetoothDiscoveryReciver();
registerReceiver(discoveryReciver, discoveryFilter);
Thread thread = new Thread(){
@Override
public void run() {
// TODO Auto-generated method stub
super.run();
BluetoothTest();
}
};
thread.start();
}
@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
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
unregisterReceiver(stateChangeReceiver);
unregisterReceiver(discoveryReciver);
}
void BluetoothTest(){
Log.i(TAG,"start BT test\n");
int i = 0;
int j = 0;
if(adapter != null){
//打开蓝牙
Log.i(TAG,"open BT...\n");
if(!adapter.isEnabled()){
adapter.enable();
done.block();
done.close();
}
//搜索蓝牙
Log.i(TAG,"discovery BT...\n");
adapter.startDiscovery();
done.block();
done.close();
if(remoteDevice != null){
byte[] sendData = new byte[1024];
byte[] receiveData = new byte[1024];
Random rand = new Random();
for(j = 0;j < sendData.length; j++)
{
sendData[j] = (byte)Math.abs(rand.nextInt());
}
BluetoothSocket socket = null;
InputStream inputStream = null;
OutputStream outputStream = null;
int recvLen = 0;
try {
Log.i(TAG,"create socket...\n");
socket = remoteDevice.createRfcommSocketToServiceRecord(MyUUID);
if(socket != null)
{
socket.connect();
outputStream = socket.getOutputStream();
inputStream = socket.getInputStream();
if(inputStream != null && outputStream != null){
//发送数据
Log.i(TAG,"send data...\n");
outputStream.write(sendData);
outputStream.flush();
//接收数据
Log.i(TAG,"recive data...\n");
while(true){
if((inputStream.available() > 0) && (recvLen < 1024)){
int len = inputStream.read(receiveData, recvLen, 1024-recvLen);
recvLen += len;
if(recvLen >= 1024){
break;
}
}
}
if(recvLen == 1024){
for(i = 0; i < 1024; i++){
if(receiveData[i]!= sendData[i]){
Log.e(TAG,"cmp error\n");
break;
}
}
}
inputStream.close();
inputStream = null;
outputStream.close();
outputStream = null;
}
socket.close();
socket = null;
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//解除绑定
Log.i(TAG,"remove bond...\n");
Method removeBondMethod;
try {
removeBondMethod = BluetoothDevice.class.getMethod("removeBond");
Boolean result = (Boolean) removeBondMethod.invoke(remoteDevice);
remoteDevice = null;
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//关闭蓝牙
Log.i(TAG,"close BT...\n");
adapter.disable();
}
}
class BluetoothStateChangeReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context arg0, Intent arg1) {
// TODO Auto-generated method stub
if(arg1.getAction().equals(BluetoothAdapter.ACTION_STATE_CHANGED)){
int state = arg1.getIntExtra(BluetoothAdapter.EXTRA_STATE, 0);
if(state == BluetoothAdapter.STATE_ON || state == BluetoothAdapter.STATE_OFF)
{
done.open();
}
}
}
}
class BluetoothDiscoveryReciver extends BroadcastReceiver{
@Override
public void onReceive(Context arg0, Intent arg1) {
// TODO Auto-generated method stub
Log.i(TAG,arg1.getAction());
if(arg1.getAction().equals(BluetoothDevice.ACTION_FOUND)){
BluetoothDevice device = arg1.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if(("00:17:6F:68:B0:91").equals(device.getAddress()))
{
if(adapter.isDiscovering()){
adapter.cancelDiscovery();
}
int state = device.getBondState();
if(state == BluetoothDevice.BOND_NONE){
Log.i(TAG,"not bonded,create bond\n");
try {
//发送配对请求
Method createBound = BluetoothDevice.class.getMethod("createBond");
createBound.invoke(device);
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}else if(state == BluetoothDevice.BOND_BONDED){
remoteDevice = device;
done.open();
}
}
}else if(arg1.getAction().equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)){
BluetoothDevice device = arg1.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
remoteDevice = device;
done.open();
Log.i(TAG,"bonded\n");
}else if(arg1.getAction().equals(BluetoothDevice.ACTION_PAIRING_REQUEST)){
//自动确认配对
BluetoothDevice device = arg1.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if(("00:17:6F:68:B0:91").equals(device.getAddress())){
Log.i(TAG,"PairingConfirmation\n");
try{
Method setPairingConfirmationMethod = BluetoothDevice.class.getMethod("setPairingConfirmation",new Class[]{boolean.class});
setPairingConfirmationMethod.invoke(device,true);
}catch(Exception e)
{
e.printStackTrace();
}
}
}
}
}
}服务器：
package com.pax.btserver;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.bluetooth.*;
import android.os.ConditionVariable;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.*;
import java.util.UUID;
import com.pax.btserver.R;
public class MainActivity extends Activity {
private final static String TAG = "BTServer";
private BluetoothAdapter adpter = null;
private ConditionVariable done = null;
private BluetoothReceiver bluetoothReceiver;
static final UUID MyUUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
done = new ConditionVariable();
adpter = BluetoothAdapter.getDefaultAdapter();
bluetoothReceiver = new BluetoothReceiver();
IntentFilter filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
filter.addAction(BluetoothDevice.ACTION_PAIRING_REQUEST);
registerReceiver(bluetoothReceiver, filter);
Thread thread = new Thread(){
@Override
public void run() {
// TODO Auto-generated method stub
super.run();
bluetoothServer();
}
};
thread.start();
}
@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
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
unregisterReceiver(bluetoothReceiver);
}
void bluetoothServer(){
Log.i(TAG,"start BT server\n");
BluetoothServerSocket serverSocket = null;
BluetoothSocket socket = null;
InputStream in = null;
OutputStream out = null;
int len = 0;
int recvLen = 0;
byte[] recvdata = new byte[1024];
if(adpter != null){
//打开蓝牙
Log.i(TAG,"open BT\n");
if(!adpter.isEnabled()){
adpter.enable();
done.block();
done.close();
}
try {
Log.i(TAG,"create serverSocket\n");
serverSocket = adpter.listenUsingRfcommWithServiceRecord("local1", MyUUID);
while(serverSocket != null){
if(adpter.isDiscovering()){
adpter.cancelDiscovery();
}
//阻塞直到客户端连接上服务器
socket = serverSocket.accept();
in = socket.getInputStream();
out= socket.getOutputStream();
if(in != null && out != null){
try{
while(true){
if(in.available() > 0){
len = in.read(recvdata);
Log.i(TAG,new String(recvdata));
if(len > 0){
out.write(recvdata);
out.flush();
len = 0;
}
}else{
break;
}
}
}catch(Exception e){
e.printStackTrace();
}finally{
in.close();
in = null;
out.close();
out = null;
socket.close();
socket = null;
}
}
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
if(serverSocket != null){
try {
serverSocket.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
serverSocket = null;
}
}
}
}
class BluetoothReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context arg0, Intent arg1) {
// TODO Auto-generated method stub
Log.i(TAG,arg1.getAction());
if(arg1.getAction().equals(BluetoothAdapter.ACTION_STATE_CHANGED)){
int state = arg1.getIntExtra(BluetoothAdapter.EXTRA_STATE, 0);
if(state == BluetoothAdapter.STATE_ON){
done.open();
}
}else if(arg1.getAction().equals(BluetoothDevice.ACTION_PAIRING_REQUEST)){
Log.i(TAG,"request pairing\n");
//有配对请求，自动确定配对
BluetoothDevice device = arg1.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
int mType = arg1.getIntExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, BluetoothDevice.ERROR);
if(mType == BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION){
try {
Method setParingConfirm = BluetoothDevice.class.getMethod("setPairingConfirmation", new Class[]{boolean.class});
setParingConfirm.invoke(device,true);
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
}
通过这listenUsingInsecureRfcommWithServiceRecord和createInsecureRfcommSocketToServiceRecord两个API，可以不配对蓝牙设备就进行通信