现在网上比较流行的蓝牙工具类：

@SuppressLint("NewApi") public class ClsUtils {
public ClsUtils() {
// TODO Auto-generated constructor stub
}

/**
* /Settings/src/com/android/settings/bluetooth/CachedBluetoothDevice.java
*/
static public boolean createBond(Class<? extends BluetoothDevice> btClass,
BluetoothDevice btDevice) throws Exception {

Method createBondMethod = btClass.getMethod("createBond");
Boolean returnValue = http://www.mamicode.com/(Boolean) createBondMethod.invoke(btDevice);
return returnValue.booleanValue();
}

/**
* /Settings/src/com/android/settings/bluetooth/CachedBluetoothDevice.java
*/
static public boolean removeBond(Class<? extends BluetoothDevice> btClass,
BluetoothDevice btDevice) throws Exception {
Method removeBondMethod = btClass.getMethod("removeBond");
Boolean returnValue = http://www.mamicode.com/(Boolean) removeBondMethod.invoke(btDevice);
return returnValue.booleanValue();
}

static public boolean setPin(Class btClass, BluetoothDevice btDevice,
byte[] str) throws Exception {
try {
Method removeBondMethod = btClass.getDeclaredMethod("setPin",new Class[] { byte[].class });
Boolean returnValue = http://www.mamicode.com/(Boolean) removeBondMethod.invoke(btDevice,str);
return returnValue.booleanValue();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return false;

}

static public boolean cancelPairingUserInput(Class<?> btClass,
BluetoothDevice device)

throws Exception {
Method createBondMethod = btClass.getMethod("cancelPairingUserInput");
cancelBondProcess(btClass, device);
Boolean returnValue = http://www.mamicode.com/(Boolean) createBondMethod.invoke(device);
return returnValue.booleanValue();
}

static public boolean cancelBondProcess(Class<?> btClass,
BluetoothDevice device)

throws Exception {
Method createBondMethod = btClass.getMethod("cancelBondProcess");
Boolean returnValue = http://www.mamicode.com/(Boolean) createBondMethod.invoke(device);
return returnValue.booleanValue();
}

/**
*
* @param clsShow
*/
static public void printAllInform(Class<?> clsShow) {
try {
Method[] hideMethod = clsShow.getMethods();
int i = 0;
for (; i < hideMethod.length; i++) {
Log.e("method name", hideMethod[i].getName() + ";and the i is:"
+ i);
}
Field[] allFields = clsShow.getFields();
for (i = 0; i < allFields.length; i++) {
Log.e("Field name", allFields[i].getName());
}
} catch (SecurityException e) {
// throw new RuntimeException(e.getMessage());
e.printStackTrace();
} catch (IllegalArgumentException e) {
// throw new RuntimeException(e.getMessage());
e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

static public boolean pair(String strAddr, byte[] strPsw) {
boolean result = false;
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

bluetoothAdapter.cancelDiscovery();

if (!bluetoothAdapter.isEnabled()) {
bluetoothAdapter.enable();
}

BluetoothDevice device = bluetoothAdapter.getRemoteDevice(strAddr);

if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
try {
Log.d("mylog", "NOT BOND_BONDED");
boolean flag1 = ClsUtils.setPin(device.getClass(), device,
strPsw);
boolean flag2 = ClsUtils.createBond(device.getClass(), device);
// remoteDevice = device;

result = true;

} catch (Exception e) {
// TODO Auto-generated catch block

Log.d("mylog", "setPiN failed!");
e.printStackTrace();
} //

} else {
Log.d("mylog", "HAS BOND_BONDED");
try {
ClsUtils.removeBond(device.getClass(), device);
// ClsUtils.createBond(device.getClass(), device);
boolean flag1 = ClsUtils.setPin(device.getClass(), device,
strPsw);
boolean flag2 = ClsUtils.createBond(device.getClass(), device);

result = true;

} catch (Exception e) {
// TODO Auto-generated catch block
Log.d("mylog", "setPiN failed!");
e.printStackTrace();
}
}
return result;
}

//A2DP ?? HeadSet
public static boolean connect(Class btClass,BluetoothProfile proxy,BluetoothDevice btDevice) throws Exception {
Method connectMethod = btClass.getDeclaredMethod("connect", BluetoothDevice.class);
connectMethod.setAccessible(true);
Boolean returnValue = http://www.mamicode.com/(Boolean) connectMethod.invoke(proxy,btDevice);
return returnValue.booleanValue();
}

public static boolean disconnect(Class btClass,BluetoothProfile proxy,BluetoothDevice btDevice) throws Exception {
Method disconnectMethod = btClass.getDeclaredMethod("disconnect", BluetoothDevice.class);
disconnectMethod.setAccessible(true);
Boolean returnValue = http://www.mamicode.com/(Boolean) disconnectMethod.invoke(proxy,btDevice);
return returnValue.booleanValue();
}

public static void setDiscoverableTimeout(int timeout) {
BluetoothAdapter adapter=BluetoothAdapter.getDefaultAdapter();
try {
Method setDiscoverableTimeout = BluetoothAdapter.class.getMethod("setDiscoverableTimeout", int.class);
setDiscoverableTimeout.setAccessible(true);
Method setScanMode =BluetoothAdapter.class.getMethod("setScanMode", int.class,int.class);
setScanMode.setAccessible(true);
setDiscoverableTimeout.invoke(adapter, timeout);
setScanMode.invoke(adapter, BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE,timeout);
} catch (Exception e) {
e.printStackTrace();
}
}

public static void closeDiscoverableTimeout() {
BluetoothAdapter adapter=BluetoothAdapter.getDefaultAdapter();
try {
Method setDiscoverableTimeout = BluetoothAdapter.class.getMethod("setDiscoverableTimeout", int.class);
setDiscoverableTimeout.setAccessible(true);
Method setScanMode =BluetoothAdapter.class.getMethod("setScanMode", int.class,int.class);
setScanMode.setAccessible(true);

setDiscoverableTimeout.invoke(adapter, 1);
setScanMode.invoke(adapter, BluetoothAdapter.SCAN_MODE_CONNECTABLE,1);
} catch (Exception e) {
e.printStackTrace();
}
}

public static void getCurrentConnectingDevice(Context mcContext,BluetoothAdapter bluetoothAdapter,final CheckConnectingListener listener){
int a2dp = bluetoothAdapter.getProfileConnectionState(BluetoothProfile.A2DP);
int headset = bluetoothAdapter.getProfileConnectionState(BluetoothProfile.HEADSET);
int health = bluetoothAdapter.getProfileConnectionState(BluetoothProfile.HEALTH);
int flag = -1;
if (a2dp == BluetoothProfile.STATE_CONNECTED) {
flag = a2dp;
}
else if (headset == BluetoothProfile.STATE_CONNECTED) {
flag = headset;
}
else if (health == BluetoothProfile.STATE_CONNECTED) {
flag = health;
}

if (flag != -1) {
bluetoothAdapter.getProfileProxy(mcContext, new ServiceListener() {

@Override
public void onServiceDisconnected(int profile) {
listener.disConnected();
Log.i("", "hh=======onServiceDisconnected=>>");
}
@Override
public void onServiceConnected(int profile, BluetoothProfile proxy) {
Log.i("", "hh=======onServiceConnected=>>"+profile);
List<BluetoothDevice> mDevices = proxy.getConnectedDevices();
listener.getConnectingDvice(mDevices);
}
}, flag);
}else{
listener.disConnected();
}
}
}

蓝牙的连接配对和可视的工具类