BluetoothAdapter ；BluetoothDevice；BluetoothSocket;BluetoothServerSocket;UUID和String转换；异常类

1.BluetoothAdapter 顾名思义，蓝牙适配器，直到我们建立bluetoothSocket连接之前，都要不断操作它
BluetoothAdapter里的方法很多，常用的有以下几个：

boolean//取消可见	cancelDiscovery()Cancel the current device discovery process.
boolean//判断蓝牙地址是否有效	checkBluetoothAddress(String address)Validate a String Bluetooth address, such as "00:43:A8:23:10:F0"Alphabetic characters must be uppercase to be valid.
void	closeProfileProxy(int profile, BluetoothProfile proxy)Close the connection of the profile proxy to the Service.
boolean//关闭蓝牙	disable()Turn off the local Bluetooth adapter—do not use without explicit user action to turn off Bluetooth.
boolean//打开蓝牙	enable()Turn on the local Bluetooth adapter—do not use without explicit user action to turn on Bluetooth.
String//得到本地蓝牙地址	getAddress()Returns the hardware address of the local Bluetooth adapter.
Set //得到已经配对蓝牙	getBondedDevices()Return the set of `BluetoothDevice` objects that are bonded (paired) to the local adapter.
synchronizedstatic BluetoothAdapter //获取默认BluetoothAdapter，实际上，也只有这一种方法获取BluetoothAdapter	getDefaultAdapter()Get a handle to the default local Bluetooth adapter.
String//得到本地蓝牙name	getName()Get the friendly Bluetooth name of the local Bluetooth adapter.
int//得到当前连接的状态	getProfileConnectionState(int profile)Get the current connection state of a profile.
boolean	getProfileProxy(Context context, BluetoothProfile.ServiceListener listener, int profile)Get the profile proxy object associated with the profile.
BluetoothDevice//通过address得device	getRemoteDevice(String address)Get a `BluetoothDevice` object for the given Bluetooth hardware address.
BluetoothDevice	getRemoteDevice(byte[] address)Get a `BluetoothDevice` object for the given Bluetooth hardware address.
int	getScanMode()Get the current Bluetooth scan mode of the local Bluetooth adapter.
int//得到当前蓝牙适配器的状态	getState()Get the current state of the local Bluetooth adapter.
boolean//是否正在查找	isDiscovering()Return true if the local Bluetooth adapter is currently in the device discovery process.
boolean//当前是否可用	isEnabled()Return true if Bluetooth is currently enabled and ready for use.
BluetoothServerSocket //通过bluetoothAdapter创建bluetoothsocket （不安全）	listenUsingInsecureRfcommWithServiceRecord(String name, UUID uuid)Create a listening, insecure RFCOMM Bluetooth socket with Service Record.
BluetoothServerSocket //通过bluetoothAdapter创建bluetoothsocket （不安全）	listenUsingRfcommWithServiceRecord(String name, UUID uuid)Create a listening, secure RFCOMM Bluetooth socket with Service Record.
boolean//设置本地蓝牙的name	setName(String name)Set the friendly Bluetooth name of the local Bluetooth adapter.
boolean	startDiscovery()Start the remote device discovery process.

listenUsingRfcommWithServiceRecord(String name,UUID uuid)根据名称，UUID创建并返回BluetoothServerSocket，这是创建BluetoothSocket服务器端的第一步
startDiscovery()开始搜索，这是搜索的第一步
2.BluetoothDevice看名字就知道，这个类描述了一个蓝牙设备

BluetoothSocket //通过根据UUID创建并返回一个BluetoothSocket	createInsecureRfcommSocketToServiceRecord(UUID uuid)Create an RFCOMM `BluetoothSocket` socket ready to start an insecure outgoing connection to this remote device using SDP lookup of uuid.
BluetoothSocket	createRfcommSocketToServiceRecord(UUID uuid)Create an RFCOMM `BluetoothSocket` ready to start a secure outgoing connection to this remote device using SDP lookup of uuid.
int	describeContents()Describe the kinds of special objects contained in this Parcelable's marshalled representation.
boolean	equals(Object o)Compares this instance with the specified object and indicates if they are equal.
boolean	fetchUuidsWithSdp()Perform a service discovery on the remote device to get the UUIDs supported.
String//得到远程设备的地址	getAddress()Returns the hardware address of this BluetoothDevice.
BluetoothClass	getBluetoothClass()Get the Bluetooth class of the remote device.
int//得到远程设备的状态	getBondState()Get the bond state of the remote device.
String得到远程设备的name	getName()Get the friendly Bluetooth name of the remote device.
ParcelUuid[]得到远程设备的uuids	getUuids()Returns the supported features (UUIDs) of the remote device.
int	hashCode()Returns an integer hash code for this object.
String	toString()Returns a string representation of this BluetoothDevice.
void	writeToParcel(Parcel out, int flags)Flatten this object in to a Parcel.

这个方法也是我们获取BluetoothDevice的目的——创建BluetoothSocket

这个类其他的方法，如getAddress(),getName(),同BluetoothAdapter
3.BluetoothServerSocket如果去除了Bluetooth相信大家一定再熟悉不过了，既然是Socket，方法就应该都差不多

BluetoothSocket	accept(int timeout)Block until a connection is established, with timeout.
BluetoothSocket	accept()Block until a connection is established.
void	close()Immediately close this socket, and release all associated resources.

两个重载的accept(),accept(inttimeout)两者的区别在于后面的方法指定了过时时间，需要注意的是，执行这两个方法的时候，直到接收到了客户端的请求（或是过期之后），都会阻塞线程，应该放在新线程里运行！
4.BluetoothSocket

void	close()Closes the object and release any system resources it holds.
void	connect()Attempt to connect to a remote device.
InputStream	getInputStream()Get the input stream associated with this socket.
OutputStream	getOutputStream()Get the output stream associated with this socket.
BluetoothDevice	getRemoteDevice()Get the remote device this socket is connecting, or connected, to.
boolean	isConnected()Get the connection status of this socket, ie, whether there is an active connection with remote device.

5.UUID和String之间的转化：
uuid->String:
String s = UUID.randomUUID().toString();
String->uuid:
【BluetoothAdapter ；BluetoothDevice；BluetoothSocket; BluetoothServerSocket; UUID和String转换；】UUID.fromString(name)