Back to project page BTSerialConsole.
The source code is released under:
MIT License
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package com.neykov.bluetoothserialconsole.connection; //from w w w. ja va2 s . c om import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.nio.charset.Charset; 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.Bundle; import android.os.Handler; import android.os.Message; import android.os.ParcelUuid; import android.util.Log; public class BluetoothDriver extends DeviceDriver { private static final String TAG = "BluetoothDriver"; private static final int READ_BUFFER_SIZE = 1024; private static final Charset READ_CHARSET = Charset.forName("US-ASCII"); public static final String EXTRA_BLUETOOTH_DEVICE = "Driver Bluetooth device Driver"; public static final String EXTRA_SECURITY_OPTION = "Driver Bluetooth device security"; // 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 static final int STATE_CONNECTED_PAUSED = 4; // now connected to a remote device public static final int MESSAGE_READ = 50; public static final int MESSAGE_WRITE = 51; private final BluetoothDevice mBluetoothDevice; private final BluetoothAdapter mBluetoothAdapter; private final String mDeviceName; private final String mDeviceAdress; private final Handler mHandler; private final boolean mSecureConnection; private final UUID mSdpUuid; private final String mSdpName; private final Bundle mDeviceDriverProperties; private ParcelUuid[] mSupportedUUIDs; private ConnectionListenThread mListeningThread; private ConnectThread mConnectThread; private ConnectedThread mConnectedThread; private int mState; private InputStream mInputStream; private OutputStream mOutputStream; public BluetoothDriver(Context mContext, BluetoothDevice device, IDeviceDriverCallback callbackObject, Handler incomingHandler, UUID sdpUuid, String sdpName, String ?ppName, boolean secureConnection) { super(mContext, callbackObject, ?ppName); this.mHandler = incomingHandler; this.mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); this.mBluetoothDevice = device; this.mDeviceAdress = mBluetoothDevice.getAddress(); this.mDeviceName = mBluetoothDevice.getName(); this.mSecureConnection = secureConnection; this.mSdpUuid = sdpUuid; this.mSdpName = sdpName; this.mSupportedUUIDs = mBluetoothDevice.getUuids(); this.mDeviceDriverProperties = new Bundle(); mDeviceDriverProperties.putParcelable(EXTRA_BLUETOOTH_DEVICE, getBluetoothDevice()); mDeviceDriverProperties.putBoolean(EXTRA_SECURITY_OPTION, isSecureConnecting()); String uuids = ""; for (ParcelUuid uuid : mSupportedUUIDs) { uuids += String.format("%1s\n", uuid.toString()); } Log.d(TAG, String.format("Created new Bluetooth device Instance:\n %1s\nSupportedUUID:\n%2s", mDeviceName, uuids)); mState = STATE_NONE; } private synchronized void setState(int state) { Log.d(TAG, "Changing state: " + mState + " -> " + state); mState = state; } public synchronized int getState() { return mState; } public boolean isSecureConnecting() { return mSecureConnection; } // Attempt to connect to the device. @Override public synchronized void openConnection() { startListening(); startConnecting(); } public synchronized void openConnection(BluetoothSocket socket) { if(socket.getRemoteDevice() != this.mBluetoothDevice) { throw new IllegalArgumentException("The provided socket's BluetoothDevice and the driver's BluetoothDevice do not match."); } startConnecting(socket); } private synchronized void startListening() { if (getState() == STATE_CONNECTED) { return; } Log.d(TAG, "Start listening for connection request."); // Cancel any thread attempting to make a connection if (mConnectThread != null) { mConnectThread.cancel(); mConnectThread = null; } // Start the thread to listen on a BluetoothServerSocket if (mListeningThread == null) { mListeningThread = new ConnectionListenThread(mSecureConnection); mListeningThread.start(); } setState(STATE_LISTEN); } private synchronized void startConnecting() { if (getState() == STATE_CONNECTED) { return; } Log.d(TAG, "connect to: " + mBluetoothDevice); // Cancel any thread attempting to make a connection if (mState == STATE_CONNECTING) { if (mConnectThread != null) { mConnectThread.cancel(); mConnectThread = null; } } // Start the thread to connect with the given device mConnectThread = new ConnectThread(BluetoothDriver.this, mBluetoothDevice, mSecureConnection); mConnectThread.start(); setState(STATE_CONNECTING); } private synchronized void startConnecting(BluetoothSocket socket) { if (getState() == STATE_CONNECTED) { return; } Log.d(TAG, "connect to: " + mBluetoothDevice); // Cancel any thread attempting to make a connection if (mState == STATE_CONNECTING) { if (mConnectThread != null) { mConnectThread.cancel(); mConnectThread = null; } } // Start the thread to connect with the given device mConnectThread = new ConnectThread(BluetoothDriver.this, socket, mSecureConnection); mConnectThread.start(); setState(STATE_CONNECTING); } protected synchronized void onConnected(BluetoothSocket socket, final String socketType) { Log.d(TAG, "connected, Socket Type:" + socketType); // Cancel the accept thread because we only want to connect to one device if (mListeningThread != null) { mListeningThread.cancel(); mListeningThread = null; } // 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; } // Start the thread to manage the connection and perform transmissions mConnectedThread = new ConnectedThread(this, socket, socketType); mConnectedThread.start(); setState(STATE_CONNECTED); } // Stop all threads public synchronized void stop() { Log.d(TAG, "stop"); if (mConnectThread != null) { mConnectThread.cancel(); mConnectThread = null; } if (mConnectedThread != null) { mConnectedThread.cancel(); mConnectedThread = null; } if (mListeningThread != null) { mListeningThread.cancel(); mListeningThread = null; } setState(STATE_NONE); } @Override public synchronized void closeConnection() { stop(); } @Override public void setup(ConnectionParameters connParams) throws IOException { if (getState() != STATE_CONNECTED) { return; } } @Override public boolean isConnected() { return ((getState() == STATE_CONNECTED)) ? true : false; } @Override public int write(byte[] writeBuffer) { return write(writeBuffer, writeBuffer.length); } @Override public int write(String writeString) { byte[] writeBuffer = writeString.getBytes(READ_CHARSET); return write(writeBuffer, writeBuffer.length); } @Override public int write(byte[] writeBuffer, int length) { // Create temporary object ConnectedThread r; // Synchronize a copy of the ConnectedThread synchronized (this) { if (mState != STATE_CONNECTED) return 0; r = mConnectedThread; } // Perform the write unsynchronized r.write(writeBuffer, length); return length; } @Override public InputStream getInputStream() { return mInputStream; } @Override public OutputStream getOutputStream() { return mOutputStream; } public BluetoothDevice getBluetoothDevice() { return mBluetoothDevice; } @Override public String getDeviceName() { return mDeviceAdress; } public Bundle getDeviceDriverProperties() { return mDeviceDriverProperties; } @Override public int hashCode() { return mDeviceAdress.hashCode(); } @Override public boolean equals(Object o) { if (o instanceof BluetoothDriver) { return mDeviceAdress.equals(((BluetoothDriver) o).mDeviceAdress); } return false; } @Override public String toString() { return String.format("%1s %2s", mDeviceName, mDeviceAdress); } /** * This thread runs while listening for incoming connections. It behaves like a server-side client. It runs until a * connection is accepted (or until cancelled). */ private class ConnectionListenThread extends Thread { // The local server socket private final BluetoothServerSocket mmServerSocket; private String mSocketType; public ConnectionListenThread(boolean secure) { BluetoothServerSocket tmp = null; mSocketType = secure ? "Secure" : "Insecure"; // Create a new listening server socket try { if (secure) { tmp = mBluetoothAdapter.listenUsingRfcommWithServiceRecord(mSdpName, mSdpUuid); } else { tmp = mBluetoothAdapter.listenUsingInsecureRfcommWithServiceRecord(mSdpName, mSdpUuid); } } catch (IOException e) { Log.e(TAG, "Socket Type: " + mSocketType + "listen() failed", e); } mmServerSocket = tmp; } public void run() { 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) { break; } // If a connection was accepted Log.i(TAG, "Connection accepted!"); if (socket != null) { synchronized (BluetoothDriver.this) { switch (mState) { case STATE_LISTEN: case STATE_CONNECTING: // Situation normal. Start the connected thread. onConnected(socket, 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; } } } } Log.i(TAG, "END mAcceptThread, socket Type: " + mSocketType); } public void cancel() { 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); } } } /* * This thread runs while attempting to make an outgoing connection with a device. It runs straight through; the * connection either succeeds or fails. */ private class ConnectThread extends Thread { private final BluetoothSocket mmSocket; private String mSocketType; private final BluetoothDriver mDriver; public ConnectThread(BluetoothDriver driver, BluetoothDevice device, boolean secure) { BluetoothSocket tmp = null; mDriver = driver; mSocketType = secure ? "Secure" : "Insecure"; // Get a BluetoothSocket for a connection with the given BluetoothDevice try { if (secure) { tmp = device.createRfcommSocketToServiceRecord(mSdpUuid); } else { tmp = device.createInsecureRfcommSocketToServiceRecord(mSdpUuid); } } catch (IOException e) { Log.e(TAG, "Socket Type: " + mSocketType + "create() failed", e); } Log.i(TAG, "Socket Type: " + mSocketType + " created successfully."); mmSocket = tmp; } public ConnectThread(BluetoothDriver driver, BluetoothSocket socket, boolean secure) { mDriver = driver; mmSocket = socket; mSocketType = secure ? "Secure" : "Insecure"; } public void run() { Log.i(TAG, "BEGIN mConnectThread:\n" + mDriver.getDeviceName() + "\nSocketType: " + mSocketType); setName("ConnectThread" + mSocketType); // Always cancel discovery because it will slow down a connection mBluetoothAdapter.cancelDiscovery(); // Make a connection to the BluetoothSocket if(!mmSocket.isConnected()) { try { // This is a blocking call and will only return on a // successful connection or an exception mmSocket.connect(); } catch (IOException e) { Log.i(TAG, "Unable to connect. " + mSocketType + e.getMessage()); // Close the socket try { mmSocket.close(); } catch (IOException e2) { Log.i(TAG, "Unable to close() " + mSocketType + " socket during connection failure", e2); } mDeviceCallback.onOpenConnectionFailed(mDriver); setState(STATE_NONE); return; } } // Reset the ConnectThread because we're done synchronized (BluetoothDriver.this) { mConnectThread = null; } // Start the connected thread onConnected(mmSocket, mSocketType); } public void cancel() { try { mmSocket.close(); } catch (IOException e) { Log.e(TAG, "close() of connect " + mSocketType + " socket failed", e); } } } /* * This thread runs during a connection with a remote device. It handles all incoming and outgoing transmissions. */ private class ConnectedThread extends Thread { private final BluetoothSocket mmSocket; private final InputStream mmInStream; private final OutputStream mmOutStream; private final BluetoothDriver mDriver; public ConnectedThread(BluetoothDriver driver, BluetoothSocket socket, String socketType) { Log.d(TAG, "create ConnectedThread: " + socketType); mDriver = driver; 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 = new BufferedInputStream(tmpIn); mmOutStream = new BufferedOutputStream(tmpOut); BluetoothDriver.this.mInputStream = tmpIn; BluetoothDriver.this.mOutputStream = tmpOut; } public void run() { mDeviceCallback.onOpenConnectionSuccess(mDriver); Log.i(TAG, "BEGIN mConnectedThread"); byte[] buffer = new byte[READ_BUFFER_SIZE]; int readBytesCount; Bundle driverProperties = getDeviceDriverProperties(); final int driverHash = hashCode(); // Keep listening to the InputStream while connected while (true) { try { // Read from the InputStream readBytesCount = mmInStream.read(buffer); String readChars = new String(buffer, 0, readBytesCount, READ_CHARSET); Log.d(TAG, "Read " + readBytesCount + " bytes: " + readChars); // Send the obtained bytes to the UI Activity Message msg = mHandler.obtainMessage(MESSAGE_READ, readBytesCount, driverHash, readChars); msg.setData(driverProperties); mHandler.sendMessage(msg); } catch (IOException e) { Log.e(TAG, "disconnected", e); try { mmInStream.close(); mmOutStream.close(); } catch (IOException e1) { e1.printStackTrace(); } mDeviceCallback.onCloseConnection(mDriver); break; } } } /** * Write to the connected OutStream. * * @param buffer * The bytes to write */ public void write(byte[] buffer, int length) { try { mmOutStream.write(buffer, 0, length); mmOutStream.flush(); Log.d(TAG, BluetoothDriver.this + "\nSent " + buffer.length + " bytes of data."); String writtenChars = new String(buffer, READ_CHARSET); // Share the sent message back to the UI Activity Message msg = mHandler.obtainMessage(MESSAGE_WRITE, length, BluetoothDriver.this.hashCode(), writtenChars); msg.setData(mDeviceDriverProperties); mHandler.sendMessage(msg); } 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); } } } }