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GNU General Public License
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package beta.delux.ghostscanner; /* w w w.j av a 2s. co m*/ /** * Created by Technician on 5/25/14. */ import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.bluetooth.BluetoothServerSocket; import android.bluetooth.BluetoothSocket; import android.content.Context; import android.util.Log; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.UUID; public class HandlerBluetoothSPP { private final String TAG = getClass().getSimpleName(); private static final boolean D = true; public enum State { NONE, LISTEN, CONNECTING, CONNECTED; } // name for the sdp record when creating server socket private static final String NAME = "BluetoothTest"; // unique UUID for this app private static final UUID SPP_UUID = UUID .fromString("00001101-0000-1000-8000-00805F9B34FB"); // member fields private final BluetoothAdapter mAdapter; private final HandlerBluetooth mHandler; private AcceptThread mAcceptThread; private ConnectThread mConnectThread; private ConnectedThread mConnectedThread; private State mState; private Context mContext; private String inMessage = ""; // constructor prepares new bluetooth spp session public HandlerBluetoothSPP(Context context, HandlerBluetooth handler) { mContext = context; mAdapter = BluetoothAdapter.getDefaultAdapter(); mState = State.NONE; mHandler = handler; } // set the current state of the connection private synchronized void setState(State state) { if (D) Log.d(TAG, "setState() " + mState + " -> " + state); mState = state; // give new state to handler so ui can update mHandler.obtainMessage(HandlerBluetooth.MessageType.STATE, -1, state) .sendToTarget(); } // return conn state public synchronized State getState() { return mState; } public synchronized String getMessage() { String returnMessage = inMessage; inMessage = ""; return returnMessage; /* * byte[] tempBytes = new byte[byteIndex]; for (int i = 0; i < * byteIndex; i++){ tempBytes[i] = inBytes[i]; inBytes[i] = 0; } * byteIndex = 0; return tempBytes; */ } // start session. start acceptthread to begin a session in listening(server) // mode. 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; } if (mConnectedThread != null) { mConnectedThread.cancel(); mConnectedThread = null; } // start the thread to listen if (mAcceptThread == null) { mAcceptThread = new AcceptThread(); mAcceptThread.start(); } setState(State.LISTEN); } // start the connectthread to initiate a connection public synchronized void connect(BluetoothDevice device) { 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 conect with the given device mConnectThread = new ConnectThread(device); mConnectThread.start(); setState(State.CONNECTING); } // start connectedThread to begin mananging a bluetooth connection private synchronized void connected(BluetoothSocket socket, BluetoothDevice device) { if (D) Log.d(TAG, "connected"); // cancel the thread that completed this connection if (mConnectThread != null) { mConnectThread.cancel(); mConnectThread = null; } // cancel any thread currently currning a connection if (mConnectedThread != null) { mConnectedThread.cancel(); mConnectedThread = null; } // cancel the accept thread because we only want to connect to one // device if (mAcceptThread != null) { mAcceptThread.cancel(); mAcceptThread = null; } // start the thread to manage the connection and perform transmissions mConnectedThread = new ConnectedThread(socket); mConnectedThread.start(); // send the name of the device back to the UI mHandler.obtainMessage(HandlerBluetooth.MessageType.DEVICE, -1, device.getName()).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 (mAcceptThread != null) { mAcceptThread.cancel(); mAcceptThread = null; } setState(State.NONE); } // write to the connected thread public void write(byte[] out) { ConnectedThread r; // synchronize a copy of connectedthread synchronized (this) { if (mState != State.CONNECTED) return; r = mConnectedThread; } // preform write unsynchronized Log.d(TAG, "WRITING " + out); r.write(out); } // write to the connected thread public void write(byte[] out, int length) { ConnectedThread r; byte[] tempBytes = new byte[length]; for (int i = 0; i < length; i++) { tempBytes[i] = out[i]; } // synchronize a copy of connectedthread synchronized (this) { if (mState != State.CONNECTED) return; r = mConnectedThread; } // preform write unsynchronized // Log.d(TAG, "WRITING " + out); r.write(tempBytes); } // write string public void write(String out) { ConnectedThread r; // synchronize a copy of connectedthread synchronized (this) { if (mState != State.CONNECTED) return; r = mConnectedThread; } Log.d(TAG, "WRITING " + out); r.write(out.getBytes()); } private void sendErrorMessage(int messageId) { setState(State.LISTEN); mHandler.obtainMessage(HandlerBluetooth.MessageType.NOTIFY, -1, mContext.getResources().getString(messageId)).sendToTarget(); } // listen for incoming connections private class AcceptThread extends Thread { // local server socket private final BluetoothServerSocket mmServerSocket; public AcceptThread() { BluetoothServerSocket tmp = null; // create a new listening server socket try { tmp = mAdapter.listenUsingRfcommWithServiceRecord(NAME, SPP_UUID); } catch (IOException e) { Log.e(TAG, "listen() failed", e); } mmServerSocket = tmp; } public void run() { if (D) Log.d(TAG, "BEGIN mAcceptedThread" + this); setName("AcceptThread"); BluetoothSocket socket = null; // listen to the server socket if we're not connected while (mState != HandlerBluetoothSPP.State.CONNECTED) { try { // this is a blocking call and will only return on a // successful // connection or exception socket = mmServerSocket.accept(); } catch (IOException e) { Log.e(TAG, "accept() failed", e); break; } // if connection accepted if (socket != null) { synchronized (HandlerBluetoothSPP.this) { switch (mState) { case LISTEN: case CONNECTING: // situation normal. start the connected thread. connected(socket, socket.getRemoteDevice()); break; case NONE: case CONNECTED: // either not ready or alread 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"); } public void cancel() { if (D) Log.d(TAG, "cancel " + this); try { mmServerSocket.close(); } catch (IOException e) { Log.e(TAG, "close() of server failed", e); } } } // this thread runs while attempting to make an outgoing connection with // a device private class ConnectThread extends Thread { private final BluetoothSocket mmSocket; private final BluetoothDevice mmDevice; public ConnectThread(BluetoothDevice device) { mmDevice = device; BluetoothSocket tmp = null; // get a bluetoothsocket for a connection with device try { tmp = device.createRfcommSocketToServiceRecord(SPP_UUID); } catch (IOException e) { Log.e(TAG, "create() failed", e); } mmSocket = tmp; } public void run() { Log.i(TAG, "BEGIN mConnectThread"); setName("ConnectThread"); // always cancel discovery because it will slow down a // connection mAdapter.cancelDiscovery(); // make a connection try { // this is a blocking call, will only return on success or // exception mmSocket.connect(); } catch (IOException e) { sendErrorMessage(R.string.bt_unable); // close socket try { mmSocket.close(); } catch (IOException e2) { Log.e(TAG, "unable to close() socket durring connection failure", e2); } // start service or restart listening HandlerBluetoothSPP.this.start(); return; } // reset the connectthread synchronized (HandlerBluetoothSPP.this) { mConnectThread = null; } // start the connected thread connected(mmSocket, mmDevice); } public void cancel() { try { mmSocket.close(); } catch (IOException e) { Log.e(TAG, "close() of connect socket failed", e); } } } // this thread runs during a connection with a remote device private class ConnectedThread extends Thread { private final BluetoothSocket mmSocket; private final InputStream mmInStream; private final OutputStream mmOutStream; public ConnectedThread(BluetoothSocket socket) { Log.d(TAG, "create ConnectedThread"); 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"); int bytes; byte[] buffer = new byte[1024]; // keep listening while connected while (true) { try { // try read bytes = mmInStream.read(buffer); /* * for (int i = 0; i < bytes; i++){ inBytes[(byteIndex + i)] * = buffer[i]; } byteIndex = byteIndex + bytes; */ inMessage = inMessage.concat(new String(buffer, 0, bytes)); // send to UI Activity mHandler.obtainMessage(HandlerBluetooth.MessageType.READ, bytes, buffer).sendToTarget(); } catch (IOException e) { Log.e(TAG, "disconnected", e); sendErrorMessage(R.string.bt_connection_lost); break; } } } // write to output stream public void write(byte[] buffer) { try { mmOutStream.write(buffer); // share message with UI Activity mHandler.obtainMessage(HandlerBluetooth.MessageType.WRITE, -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); } } } }