我的BluetoothChat示例源码阅读笔记

BluetoothChat核心类BluetoothChatService，该类用于管理与其他设备的蓝牙连接和设置。该类包含AcceptThread、ConnectedThread、ConnectThread三个线程。AcceptThread用于监听传入的连接。ConnectedThread用于管理与远程设备的连接，处理所有数据的传入与传出。ConnectThread用于连接远程设备。

类图如下：

1 //获取设备蓝牙
2 BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
3 //判断蓝牙是否可用，不可以则跳转到系统蓝牙设置界面
4 if (!mBluetoothAdapter.isEnabled()) {
5             Intent enableIntent = new Intent(
6                     BluetoothAdapter.ACTION_REQUEST_ENABLE);
7             startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
8         }

 1 //设置设备蓝牙可以被其他设备搜索
 2 //SCAN_MODE_CONNECTABLE_DISCOVERABLE  表明该蓝牙设备同时可以扫码其他蓝牙设备，并且可以被其他蓝牙设备扫描到。
 3
 4 private void ensureDiscoverable() {
 5
 6         if (mBluetoothAdapter.getScanMode() != BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
 7             Intent discoverableIntent = new Intent(
 8                     BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
 9             discoverableIntent.putExtra(
10                     BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);
11             startActivity(discoverableIntent);
12         }
13     }

1 //获取远程蓝牙设备 2 3 BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);

 1 //使用listenUsingRfcommWithServiceRecord和listenUsingInsecureRfcommWithServiceRecord以服务端的方式创建监听
 2
 3 public AcceptThread(boolean secure) {
 4             BluetoothServerSocket tmp = null;
 5             mSocketType = secure ? "Secure" : "Insecure";
 6
 7             // Create a new listening server socket
 8             try {
 9                 if (secure) {
10                     tmp = mAdapter.listenUsingRfcommWithServiceRecord(
11                             NAME_SECURE, MY_UUID_SECURE);
12                 } else {
13                     tmp = mAdapter.listenUsingInsecureRfcommWithServiceRecord(
14                             NAME_INSECURE, MY_UUID_INSECURE);
15                 }
16             } catch (IOException e) {
17                 Log.e(TAG, "Socket Type: " + mSocketType + "listen() failed", e);
18             }
19             mmServerSocket = tmp;
20         }
21 接受socket连接
22
23     BluetoothSocket socket = null;
24 socket = mmServerSocket.accept();

 1 //使用createRfcommSocketToServiceRecord和createInsecureRfcommSocketToServiceRecord以客户端的方式创建监听
 2
 3 public ConnectThread(BluetoothDevice device, boolean secure) {
 4             mmDevice = device;
 5             BluetoothSocket tmp = null;
 6             mSocketType = secure ? "Secure" : "Insecure";
 7
 8             // Get a BluetoothSocket for a connection with the
 9             // given BluetoothDevice
10             try {
11                 if (secure) {
12                     tmp = device
13                             .createRfcommSocketToServiceRecord(MY_UUID_SECURE);
14                 } else {
15                     tmp = device
16                             .createInsecureRfcommSocketToServiceRecord(MY_UUID_INSECURE);
17                 }
18             } catch (IOException e) {
19                 Log.e(TAG, "Socket Type: " + mSocketType + "create() failed", e);
20             }
21             mmSocket = tmp;
22         }
23
24 //连接到服务端socket
25 mmSocket.connect();

 1 //从socket中使用getInputStream和getOutputStream获取输入流和输出流
 2
 3 public ConnectedThread(BluetoothSocket socket, String socketType) {
 4             Log.d(TAG, "create ConnectedThread: " + socketType);
 5             mmSocket = socket;
 6             InputStream tmpIn = null;
 7             OutputStream tmpOut = null;
 8
 9             // Get the BluetoothSocket input and output streams
10             try {
11                 tmpIn = socket.getInputStream();
12                 tmpOut = socket.getOutputStream();
13             } catch (IOException e) {
14                 Log.e(TAG, "temp sockets not created", e);
15             }
16
17             mmInStream = tmpIn;
18             mmOutStream = tmpOut;
19         }
20
21 //使用输入流读取数据
22 bytes = mmInStream.read(buffer);
23
24 //使用输出流写入数据
25 mmOutStream.write(buffer);