android 蓝牙通讯
16lz
2021-01-23
1.client:
package com.wistron.cschat;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 android.bluetooth.BluetoothAdapter;import android.bluetooth.BluetoothDevice;import android.bluetooth.BluetoothServerSocket;import android.bluetooth.BluetoothSocket;import android.content.Context;import android.os.Handler;import android.util.Log;public class BluetoothChatClient { // Debugging private static final String TAG = "BluetoothChatService"; private static final boolean D = true; private static final String NAME_SECURE = "BluetoothChatSecure"; private static final String NAME_INSECURE = "BluetoothChatInsecure"; // Unique UUID for this application private static final UUID MY_UUID_SECURE = UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66"); private static final UUID MY_UUID_INSECURE =UUID.fromString("8ce255c0-200a-11e0-ac64-0800200c9a66"); // Member fields private final BluetoothAdapter mAdapter; private AcceptThread mSecureAcceptThread; private AcceptThread mInsecureAcceptThread; private ConnectThread mConnectThread; private ConnectedThread mConnectedThread; private int mState; // Constants that indicate the current connection state public static final int STATE_NONE = 0; // we're doing nothing public static final int STATE_LISTEN = 1; // now listening for incoming connections public static final int STATE_CONNECTING = 2; // now initiating an outgoing connection public static final int STATE_CONNECTED = 3; // now connected to a remote device public Handler mHandler; /** * Constructor. Prepares a new BluetoothChat session. * @param context The UI Activity Context * @param handler A Handler to send messages back to the UI Activity */ public BluetoothChatClient(Context context, Handler handler) { mAdapter = BluetoothAdapter.getDefaultAdapter(); mState = STATE_NONE; mHandler = handler; } private synchronized void setState(int state) { if (D) Log.d(TAG, "setState() " + mState + " -> " + state); mState = state; // Give the new state to the Handler so the UI Activity can update } /** * Return the current connection state. */ public synchronized int getState() { return mState; } public synchronized void start() { if (D) Log.d(TAG, "start"); // Cancel any thread attempting to make a connection if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;} // Cancel any thread currently running a connection if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;} setState(STATE_LISTEN); // Start the thread to listen on a BluetoothServerSocket if (mInsecureAcceptThread == null) { mInsecureAcceptThread = new AcceptThread(false); mInsecureAcceptThread.start(); } } public synchronized void connect(BluetoothDevice device, boolean secure) { if (D) Log.d(TAG, "connect to: " + device); // Cancel any thread attempting to make a connection if (mState == STATE_CONNECTING) { if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;} } // Cancel any thread currently running a connection if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;} // Start the thread to connect with the given device mConnectThread = new ConnectThread(device, secure); mConnectThread.start(); mHandler.obtainMessage(ActivityFragment.MSG_CLIENT_START_CONNECT_THREAD).sendToTarget(); setState(STATE_CONNECTING); } public synchronized void connected(BluetoothSocket socket, BluetoothDevice device, final String socketType) { if (D) Log.d(TAG, "connected, Socket Type:" + socketType); // Cancel the thread that completed the connection if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;} // Cancel any thread currently running a connection if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;} // Cancel the accept thread because we only want to connect to one device if (mSecureAcceptThread != null) { mSecureAcceptThread.cancel(); mSecureAcceptThread = null; } if (mInsecureAcceptThread != null) { mInsecureAcceptThread.cancel(); mInsecureAcceptThread = null; } // Start the thread to manage the connection and perform transmissions mConnectedThread = new ConnectedThread(socket, socketType); mConnectedThread.start(); mHandler.obtainMessage(ActivityFragment.MSG_CLIENT_CONNECT_SUCCESS).sendToTarget(); // Send the name of the connected device back to the UI Activity setState(STATE_CONNECTED); } /** * Stop all threads */ public synchronized void stop() { if (D) Log.d(TAG, "stop"); if (mConnectThread != null) { mConnectThread.cancel(); mConnectThread = null; } if (mConnectedThread != null) { mConnectedThread.cancel(); mConnectedThread = null; } if (mSecureAcceptThread != null) { mSecureAcceptThread.cancel(); mSecureAcceptThread = null; } if (mInsecureAcceptThread != null) { mInsecureAcceptThread.cancel(); mInsecureAcceptThread = null; } setState(STATE_NONE); } public void write(byte[] out) { // Create temporary object ConnectedThread r; // Synchronize a copy of the ConnectedThread synchronized (this) { if (mState != STATE_CONNECTED) return; r = mConnectedThread; } // Perform the write unsynchronized r.write(out); } private class AcceptThread extends Thread { // The local server socket private final BluetoothServerSocket mmServerSocket; private String mSocketType; public AcceptThread(boolean secure) { BluetoothServerSocket tmp = null; mSocketType = secure ? "Secure":"Insecure"; // Create a new listening server socket try { if (secure) { tmp = mAdapter.listenUsingRfcommWithServiceRecord(NAME_SECURE, MY_UUID_SECURE); } else { tmp = mAdapter.listenUsingInsecureRfcommWithServiceRecord( NAME_INSECURE, MY_UUID_INSECURE); } } catch (IOException e) { Log.e(TAG, "Socket Type: " + mSocketType + "listen() failed", e); } mmServerSocket = tmp; } public void run() { if (D) Log.d(TAG, "Socket Type: " + mSocketType + "BEGIN mAcceptThread" + this); setName("AcceptThread" + mSocketType); BluetoothSocket socket = null; // Listen to the server socket if we're not connected while (mState != STATE_CONNECTED) { try { // This is a blocking call and will only return on a // successful connection or an exception socket = mmServerSocket.accept(); } catch (IOException e) { Log.e(TAG, "Socket Type: " + mSocketType + "accept() failed", e); break; } // If a connection was accepted if (socket != null) { synchronized (BluetoothChatClient.this) { switch (mState) { case STATE_LISTEN: case STATE_CONNECTING: // Situation normal. Start the connected thread. connected(socket, socket.getRemoteDevice(), mSocketType); break; case STATE_NONE: case STATE_CONNECTED: // Either not ready or already connected. Terminate new socket. try { socket.close(); } catch (IOException e) { Log.e(TAG, "Could not close unwanted socket", e); } break; } } } } if (D) Log.i(TAG, "END mAcceptThread, socket Type: " + mSocketType); } public void cancel() { if (D) Log.d(TAG, "Socket Type" + mSocketType + "cancel " + this); try { mmServerSocket.close(); } catch (IOException e) { Log.e(TAG, "Socket Type" + mSocketType + "close() of server failed", e); } } } private class ConnectThread extends Thread { private final BluetoothSocket mmSocket; private final BluetoothDevice mmDevice; private String mSocketType; public ConnectThread(BluetoothDevice device, boolean secure) { mmDevice = device; BluetoothSocket tmp = null; mSocketType = secure ? "Secure" : "Insecure"; // Get a BluetoothSocket for a connection with the // given BluetoothDevice// try {// if (secure) {// tmp = device.createRfcommSocketToServiceRecord(// MY_UUID_SECURE);// } else {// tmp = device.createInsecureRfcommSocketToServiceRecord(// MY_UUID_INSECURE);// }// } catch (IOException e) {// Log.e(TAG, "Socket Type: " + mSocketType + "create() failed", e);// } try { // secureMethod method = device.getClass().getMethod("createRfcommSocket", new Class[]{int.class}); tmp = (BluetoothSocket)method.invoke(device, Integer.valueOf(29));} catch (NoSuchMethodException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IllegalArgumentException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IllegalAccessException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (InvocationTargetException e) {// TODO Auto-generated catch blocke.printStackTrace();} mmSocket = tmp; } public void run() { Log.i(TAG, "BEGIN mConnectThread SocketType:" + mSocketType); setName("ConnectThread" + mSocketType); // Always cancel discovery because it will slow down a connection mAdapter.cancelDiscovery(); // Make a connection to the BluetoothSocket try { // This is a blocking call and will only return on a // successful connection or an exception mmSocket.connect(); } catch (IOException e) { // Close the socket e.printStackTrace(); try { mmSocket.close(); } catch (IOException e2) { Log.e(TAG, "unable to close() " + mSocketType + " socket during connection failure", e2); } mHandler.obtainMessage(ActivityFragment.MSG_CLIENT_CONNECT_FAIL,String.valueOf(e)).sendToTarget(); return; } // Reset the ConnectThread because we're done synchronized (BluetoothChatClient.this) { mConnectThread = null; } // Start the connected thread connected(mmSocket, mmDevice, mSocketType); } public void cancel() { try { mmSocket.close(); } catch (IOException e) { Log.e(TAG, "close() of connect " + mSocketType + " socket failed", e); } } } private class ConnectedThread extends Thread { private final BluetoothSocket mmSocket; private final InputStream mmInStream; private final OutputStream mmOutStream; public ConnectedThread(BluetoothSocket socket, String socketType) { Log.d(TAG, "create ConnectedThread: " + socketType); mmSocket = socket; InputStream tmpIn = null; OutputStream tmpOut = null; // Get the BluetoothSocket input and output streams try { tmpIn = socket.getInputStream(); tmpOut = socket.getOutputStream(); } catch (IOException e) { Log.e(TAG, "temp sockets not created", e); } mmInStream = tmpIn; mmOutStream = tmpOut; } public void run() { Log.i(TAG, "BEGIN mConnectedThread"); byte[] buffer = new byte[1024]; int bytes; // Keep listening to the InputStream while connected while (true) { try { // Read from the InputStream bytes = mmInStream.read(buffer); // Send the obtained bytes to the UI Activity mHandler.obtainMessage(ActivityFragment.MSG_CLIENT_READ_INFO, bytes, -1, buffer).sendToTarget(); } catch (IOException e) { Log.e(TAG, "disconnected", e);// connectionLost(); // Start the service over to restart listening mode// BluetoothChatService.this.start(); break; } } } public void write(byte[] buffer) { try { mmOutStream.write(buffer); // Share the sent message back to the UI Activity// mHandler.obtainMessage(BluetoothChat.MESSAGE_WRITE, -1, -1, buffer)// .sendToTarget(); } catch (IOException e) { Log.e(TAG, "Exception during write", e); } } public void cancel() { try { mmSocket.close(); } catch (IOException e) { Log.e(TAG, "close() of connect socket failed", e); } } }} 2.Server:
package com.wistron.cschat;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 android.bluetooth.BluetoothAdapter;import android.bluetooth.BluetoothDevice;import android.bluetooth.BluetoothServerSocket;import android.bluetooth.BluetoothSocket;import android.content.Context;import android.os.Handler;import android.util.Log;public class BluetoothChatServer { // Debugging private static final String TAG = "BluetoothChatService"; private static final boolean D = true; // Name for the SDP record when creating server socket private static final String NAME_SECURE = "BluetoothChatSecure"; private static final String NAME_INSECURE = "BluetoothChatInsecure"; // Unique UUID for this application private static final UUID MY_UUID_SECURE = UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66"); private static final UUID MY_UUID_INSECURE =UUID.fromString("8ce255c0-200a-11e0-ac64-0800200c9a66"); // Member fields private final BluetoothAdapter mAdapter;// private final Handler mHandler; private AcceptThread mSecureAcceptThread; private AcceptThread mInsecureAcceptThread; private ConnectThread mConnectThread; private ConnectedThread mConnectedThread; private int mState; // Constants that indicate the current connection state public static final int STATE_NONE = 0; // we're doing nothing public static final int STATE_LISTEN = 1; // now listening for incoming connections public static final int STATE_CONNECTING = 2; // now initiating an outgoing connection public static final int STATE_CONNECTED = 3; // now connected to a remote device public Context mContext; public Handler mHandler; public BluetoothChatServer(Context context, Handler handler) { mAdapter = BluetoothAdapter.getDefaultAdapter(); mState = STATE_NONE; mHandler = handler; mContext = context; } private synchronized void setState(int state) { if (D) Log.d(TAG, "setState() " + mState + " -> " + state); mState = state; // Give the new state to the Handler so the UI Activity can update// mHandler.obtainMessage(mContext.MESSAGE_STATE_CHANGE, state, -1).sendToTarget(); } /** * Return the current connection state. */ public synchronized int getState() { return mState; } public synchronized void start() { if (D) Log.d(TAG, "start"); // Cancel any thread attempting to make a connection if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;} // Cancel any thread currently running a connection if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;} setState(STATE_LISTEN); // Start the thread to listen on a BluetoothServerSocket if (mSecureAcceptThread == null) { mSecureAcceptThread = new AcceptThread(false); mSecureAcceptThread.start();// mHandler.obtainMessage(ActivityFragment.MSG_SERVER_OTHER_MESSAGE, "Start Accept").sendToTarget(); } } public synchronized void connect(BluetoothDevice device, boolean secure) { if (D) Log.d(TAG, "connect to: " + device); // Cancel any thread attempting to make a connection if (mState == STATE_CONNECTING) { if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;} } // Cancel any thread currently running a connection if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;} // Start the thread to connect with the given device mConnectThread = new ConnectThread(device, secure); mConnectThread.start(); setState(STATE_CONNECTING); } public synchronized void connected(BluetoothSocket socket, BluetoothDevice device, final String socketType) { if (D) Log.d(TAG, "connected, Socket Type:" + socketType); // Cancel the thread that completed the connection if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;} // Cancel any thread currently running a connection if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;} // Cancel the accept thread because we only want to connect to one device if (mSecureAcceptThread != null) { mSecureAcceptThread.cancel(); mSecureAcceptThread = null; } if (mInsecureAcceptThread != null) { mInsecureAcceptThread.cancel(); mInsecureAcceptThread = null; } // Start the thread to manage the connection and perform transmissions mConnectedThread = new ConnectedThread(socket, socketType); mConnectedThread.start(); mHandler.obtainMessage(ActivityFragment.MSG_SERVER_CONNECT_SUCCESS).sendToTarget(); setState(STATE_CONNECTED); } /** * Stop all threads */ public synchronized void stop() { if (D) Log.d(TAG, "stop"); if (mConnectThread != null) { mConnectThread.cancel(); mConnectThread = null; } if (mConnectedThread != null) { mConnectedThread.cancel(); mConnectedThread = null; } if (mSecureAcceptThread != null) { mSecureAcceptThread.cancel(); mSecureAcceptThread = null; } if (mInsecureAcceptThread != null) { mInsecureAcceptThread.cancel(); mInsecureAcceptThread = null; } setState(STATE_NONE); } public void write(byte[] out) { // Create temporary object ConnectedThread r; // Synchronize a copy of the ConnectedThread synchronized (this) { if (mState != STATE_CONNECTED) return; r = mConnectedThread; } // Perform the write unsynchronized r.write(out); } private void connectionFailed() { // Send a failure message back to the Activity// Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_TOAST);// Bundle bundle = new Bundle();// bundle.putString(BluetoothChat.TOAST, "Unable to connect device");// msg.setData(bundle);// mHandler.sendMessage(msg); // Start the service over to restart listening mode BluetoothChatServer.this.start(); } /** * Indicate that the connection was lost and notify the UI Activity. */ private void connectionLost() { // Send a failure message back to the Activity// Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_TOAST);// Bundle bundle = new Bundle();// bundle.putString(BluetoothChat.TOAST, "Device connection was lost");// msg.setData(bundle);// mHandler.sendMessage(msg); // Start the service over to restart listening mode BluetoothChatServer.this.start(); } private class AcceptThread extends Thread { // The local server socket private final BluetoothServerSocket mmServerSocket; private String mSocketType; public AcceptThread(boolean secure) { BluetoothServerSocket tmp = null; mSocketType = secure ? "Secure":"Insecure"; // Create a new listening server socket// try {// if (secure) {// tmp = mAdapter.listenUsingRfcommWithServiceRecord(NAME_SECURE,// MY_UUID_SECURE);// } else {// tmp = mAdapter.listenUsingInsecureRfcommWithServiceRecord(// NAME_INSECURE, MY_UUID_INSECURE);// }// } catch (IOException e) {// Log.e(TAG, "Socket Type: " + mSocketType + "listen() failed", e);// String msg = "Socket Type: " + mSocketType + "listen() failed";// mHandler.obtainMessage(BTServer.MSG_EXCEPTION, msg).sendToTarget();// } try { // secureMethod method = mAdapter.getClass().getMethod("listenUsingRfcommOn", new Class[]{int.class});tmp = (BluetoothServerSocket)method.invoke(mAdapter,new Object[]{29});} catch (NoSuchMethodException e) {// TODO Auto-generated catch blocke.printStackTrace();mHandler.obtainMessage(ActivityFragment.MSG_SERVER_OTHER_MESSAGE, String.valueOf(e)).sendToTarget();} catch (IllegalArgumentException e) {// TODO Auto-generated catch blocke.printStackTrace();mHandler.obtainMessage(ActivityFragment.MSG_SERVER_OTHER_MESSAGE, String.valueOf(e)).sendToTarget();} catch (IllegalAccessException e) {// TODO Auto-generated catch blocke.printStackTrace();mHandler.obtainMessage(ActivityFragment.MSG_SERVER_OTHER_MESSAGE, String.valueOf(e)).sendToTarget();} catch (InvocationTargetException e) {// TODO Auto-generated catch blocke.printStackTrace();mHandler.obtainMessage(ActivityFragment.MSG_SERVER_OTHER_MESSAGE, String.valueOf(e)).sendToTarget();} mmServerSocket = tmp; } public void run() { if (D) Log.d(TAG, "Socket Type: " + mSocketType + "BEGIN mAcceptThread" + this); setName("AcceptThread" + mSocketType); BluetoothSocket socket = null; // Listen to the server socket if we're not connected while (mState != STATE_CONNECTED) { try { // This is a blocking call and will only return on a // successful connection or an exception socket = mmServerSocket.accept(); } catch (IOException e) { Log.e(TAG, "Socket Type: " + mSocketType + "accept() failed", e); String msg = "Socket Type: " + mSocketType + "accept() failed";// mHandler.obtainMessage(ActivityFragment.MSG_EXCEPTION, msg).sendToTarget(); break; } // If a connection was accepted if (socket != null) { synchronized (BluetoothChatServer.this) { switch (mState) { case STATE_LISTEN: case STATE_CONNECTING: // Situation normal. Start the connected thread. connected(socket, socket.getRemoteDevice(), mSocketType); break; case STATE_NONE: case STATE_CONNECTED: // Either not ready or already connected. Terminate new socket. try { socket.close(); } catch (IOException e) { Log.e(TAG, "Could not close unwanted socket", e); } break; } } } } if (D) Log.i(TAG, "END mAcceptThread, socket Type: " + mSocketType); } public void cancel() { if (D) Log.d(TAG, "Socket Type" + mSocketType + "cancel " + this); try { mmServerSocket.close();// mHandler.obtainMessage(ActivityFragment.MSG_SERVER_OTHER_MESSAGE, "Stop Accept").sendToTarget(); } catch (IOException e) { Log.e(TAG, "Socket Type" + mSocketType + "close() of server failed", e); mHandler.obtainMessage(ActivityFragment.MSG_SERVER_EXCEPTION, String.valueOf(e)).sendToTarget(); } } } private class ConnectThread extends Thread { private final BluetoothSocket mmSocket; private final BluetoothDevice mmDevice; private String mSocketType; public ConnectThread(BluetoothDevice device, boolean secure) { mmDevice = device; BluetoothSocket tmp = null; mSocketType = secure ? "Secure" : "Insecure"; // Get a BluetoothSocket for a connection with the // given BluetoothDevice try { if (secure) { tmp = device.createRfcommSocketToServiceRecord( MY_UUID_SECURE); } else { tmp = device.createInsecureRfcommSocketToServiceRecord( MY_UUID_INSECURE); } } catch (IOException e) { Log.e(TAG, "Socket Type: " + mSocketType + "create() failed", e); } mmSocket = tmp; } public void run() { Log.i(TAG, "BEGIN mConnectThread SocketType:" + mSocketType); setName("ConnectThread" + mSocketType); // Always cancel discovery because it will slow down a connection mAdapter.cancelDiscovery(); // Make a connection to the BluetoothSocket try { // This is a blocking call and will only return on a // successful connection or an exception mmSocket.connect(); } catch (IOException e) { // Close the socket try { mmSocket.close(); } catch (IOException e2) { Log.e(TAG, "unable to close() " + mSocketType + " socket during connection failure", e2); } connectionFailed(); return; } // Reset the ConnectThread because we're done synchronized (BluetoothChatServer.this) { mConnectThread = null; } // Start the connected thread connected(mmSocket, mmDevice, mSocketType); } public void cancel() { try { mmSocket.close(); } catch (IOException e) { Log.e(TAG, "close() of connect " + mSocketType + " socket failed", e); } } } private class ConnectedThread extends Thread { private final BluetoothSocket mmSocket; private final InputStream mmInStream; private final OutputStream mmOutStream; public ConnectedThread(BluetoothSocket socket, String socketType) { Log.d(TAG, "create ConnectedThread: " + socketType); mmSocket = socket; InputStream tmpIn = null; OutputStream tmpOut = null; // Get the BluetoothSocket input and output streams try { tmpIn = socket.getInputStream(); tmpOut = socket.getOutputStream(); } catch (IOException e) { Log.e(TAG, "temp sockets not created", e); } mmInStream = tmpIn; mmOutStream = tmpOut; } public void run() { Log.i(TAG, "BEGIN mConnectedThread"); byte[] buffer = new byte[1024]; int bytes; // Keep listening to the InputStream while connected while (true) { try { // Read from the InputStream bytes = mmInStream.read(buffer); // Send the obtained bytes to the UI Activity mHandler.obtainMessage(ActivityFragment.MSG_SERVER_READ_INFO, bytes, -1, buffer).sendToTarget(); } catch (IOException e) { Log.e(TAG, "disconnected", e); connectionLost(); // Start the service over to restart listening mode BluetoothChatServer.this.start(); break; } } } public void write(byte[] buffer) { try { mmOutStream.write(buffer); // Share the sent message back to the UI Activity// mHandler.obtainMessage(BluetoothChat.MESSAGE_WRITE, -1, -1, buffer)// .sendToTarget(); } catch (IOException e) { Log.e(TAG, "Exception during write", e); } } public void cancel() { try { mmSocket.close(); } catch (IOException e) { Log.e(TAG, "close() of connect socket failed", e); } } }} 3.实例化对象。
BluetoothChatServer mBluetoothChatServer = new BluetoothChatServer(mContext, mHandler);BluetoothChatClient mBluetoothChatClient = new BluetoothChatClient(mContext, mClientHandler);
4.发送消息。
String msg = mInputMsgEditText.getText().toString().trim();mBluetoothChatServer.write(msg.getBytes());// clientmBluetoothChatClient.write(msg.getBytes());
5.接受消息：
public Handler mClientHandler = new Handler() {@Overridepublic void handleMessage(Message msg) {// TODO Auto-generated method stubsuper.handleMessage(msg);switch (msg.what) {case MSG_CLIENT_READ_INFO:byte[] readBuf = (byte[]) msg.obj;String readMessage = new String(readBuf, 0, msg.arg1); Toast.makeText(mContext, readMessage, Toast.LENGTH_SHORT).show();break;default:break;}}}; 更多相关文章
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