package org.bcsphere.bluetooth;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.nio.ByteBuffer;
import java.util.UUID;
import org.apache.cordova.CallbackContext;
import org.apache.cordova.PluginResult;
import org.bcsphere.bluetooth.tools.Tools;
import org.json.JSONObject;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
/**
* This class does all the work for setting up and managing Bluetooth
* connections with other devices. It has a thread that listens for
* incoming connections, a thread for connecting with a device, and a
* thread for performing data transmissions when connected.
*
* This code was based on the Android SDK BluetoothChat Sample
* $ANDROID_SDK/samples/android-17/BluetoothChat
*/
public class BluetoothSerialService {
// Debugging
private static final String TAG = "BluetoothSerialService";
private static final boolean D = true;
// Well known SPP UUID
//public static UUID UUID_SPP = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
// Member fields
private final BluetoothAdapter mAdapter;
private final Handler mHandler;
private AcceptThread mAcceptThread;
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 static final int MESSAGE_STATE_CHANGE = 1;
public static final int MESSAGE_READ = 2;
public static final int MESSAGE_WRITE = 3;
public static final int MESSAGE_DEVICE_NAME = 4;
public static final int CONNECT_FAILED = 5;
public static final int CONNECT_LOST = 6;
public static final String TOAST = "toast";
public CallbackContext connectCallback;
public CallbackContext disconnectCallback;
public CallbackContext dataAvailableCallback;
private String deviceAddress;
ByteBuffer buffer = ByteBuffer.allocate(2048);
int bufferSize = 0;
/**
* Constructor. Prepares a new BluetoothSerial session.
* @param handler A Handler to send messages back to the UI Activity
*/
public BluetoothSerialService() {
mAdapter = BluetoothAdapter.getDefaultAdapter();
mState = STATE_NONE;
mHandler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case MESSAGE_READ:
if (dataAvailableCallback != null) {
sendDataToSubscriber((byte[])msg.obj);
}else{
byte[] data = (byte[])msg.obj;
buffer.put(data);
bufferSize = bufferSize + data.length;
}
break;
case MESSAGE_STATE_CHANGE:
//if(D) Log.i(TAG, "MESSAGE_STATE_CHANGE: " + msg.arg1);
switch (msg.arg1) {
case BluetoothSerialService.STATE_CONNECTED:
Log.i("BluetoothSerial", "BluetoothSerialService.STATE_CONNECTED");
notifyConnectionSuccess();
break;
case BluetoothSerialService.STATE_CONNECTING:
Log.i("BluetoothSerial", "BluetoothSerialService.STATE_CONNECTING");
break;
case BluetoothSerialService.STATE_LISTEN:
Log.i("BluetoothSerial", "BluetoothSerialService.STATE_LISTEN");
break;
case BluetoothSerialService.STATE_NONE:
Log.i("BluetoothSerial", "BluetoothSerialService.STATE_NONE");
break;
}
break;
case MESSAGE_WRITE:
// byte[] writeBuf = (byte[]) msg.obj;
// String writeMessage = new String(writeBuf);
// Log.i(TAG, "Wrote: " + writeMessage);
break;
case MESSAGE_DEVICE_NAME:
//Log.i(TAG, msg.getData().getString(DEVICE_NAME));
break;
case CONNECT_FAILED:
notifyConnectionFailed();
break;
case CONNECT_LOST:
notifyConnectionLost();
break;
}
}
};
}
/**
* Set the current state of the chat connection
* @param state An integer defining the current connection state
*/
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(MESSAGE_STATE_CHANGE, state, -1).sendToTarget();
}
/**
* Return the current connection state. */
public synchronized int getState() {
return mState;
}
/**
* Start the chat service. Specifically start AcceptThread to begin a
* session in listening (server) mode. Called by the Activity onResume() */
public synchronized void listen(String name,String uuidstr,boolean secure, BCBluetooth bcbluetooth) {
if (D) Log.d(TAG, "startListen");
UUID uuid = UUID.fromString(uuidstr);
// 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_NONE);
//Listen isn't working with Arduino. Ignore since assuming the phone will initiate the connection.
setState(STATE_LISTEN);
// Start the thread to listen on a BluetoothServerSocket
if (mAcceptThread == null) {
mAcceptThread = new AcceptThread(name,uuid,secure,bcbluetooth,this);
mAcceptThread.start();
}
}
public synchronized void unlisten() {
if (D) Log.d(TAG, "stopListen");
// 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_NONE);
// Start the thread to listen on a BluetoothServerSocket
if (mAcceptThread != null) {
mAcceptThread.cancel();
}
}
/**
* Start the ConnectThread to initiate a connection to a remote device.
* @param device The BluetoothDevice to connect
* @param secure Socket Security type - Secure (true) , Insecure (false)
*/
public synchronized void connect(BluetoothDevice device,String uuidstr, boolean secure) {
if (D) Log.d(TAG, "connect to: " + device);
deviceAddress = device.getAddress();
UUID uuid = UUID.fromString(uuidstr);
// 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,uuid,secure);
mConnectThread.start();
setState(STATE_CONNECTING);
}
/**
* Start the ConnectedThread to begin managing a Bluetooth connection
* @param socket The BluetoothSocket on which the connection was made
* @param device The BluetoothDevice that has been connected
*/
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 (mAcceptThread != null) {
mAcceptThread.cancel();
mAcceptThread = null;
}
// Start the thread to manage the connection and perform transmissions
mConnectedThread = new ConnectedThread(socket, socketType);
mConnectedThread.start();
// Send the name of the connected device back to the UI Activity
Message msg = mHandler.obtainMessage(MESSAGE_DEVICE_NAME);
Bundle bundle = new Bundle();
bundle.putString(Tools.DEVICE_NAME, device.getName());
msg.setData(bundle);
mHandler.sendMessage(msg);
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 ConnectedThread in an unsynchronized manner
* @param out The bytes to write
* @see ConnectedThread#write(byte[])
*/
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);
}
/**
* Indicate that the connection attempt failed and notify the UI Activity.
*/
private void connectionFailed() {
// Send a failure message back to the Activity
Message msg = mHandler.obtainMessage(CONNECT_FAILED);
Bundle bundle = new Bundle();
bundle.putString(TOAST, "Unable to connect to device");
msg.setData(bundle);
mHandler.sendMessage(msg);
// Start the service over to restart listening mode
//BluetoothSerialService.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(CONNECT_LOST);
Bundle bundle = new Bundle();
bundle.putString(TOAST, "Device connection was lost");
msg.setData(bundle);
mHandler.sendMessage(msg);
// Start the service over to restart listening mode
//BluetoothSerialService.this.start();
}
/**
* 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 AcceptThread extends Thread {
// The local server socket
private final BluetoothServerSocket mmServerSocket;
private String mSocketType;
private BCBluetooth bcbluetooth;
private BluetoothSerialService service;
private String name;
private String uuidstr;
public AcceptThread(String name,UUID uuid,boolean secure,BCBluetooth bluetooth,BluetoothSerialService serialService) {
BluetoothServerSocket tmp = null;
mSocketType = secure ? "Secure":"Insecure";
bcbluetooth = bluetooth;
service = serialService;
this.name = name;
this.uuidstr = uuid.toString();
// Create a new listening server socket
try {
if (secure) {
tmp = mAdapter.listenUsingRfcommWithServiceRecord(name, uuid);
} else {
tmp = mAdapter.listenUsingInsecureRfcommWithServiceRecord(name, uuid);
}
} 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;
// 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 (BluetoothSerialService.this) {
switch (mState) {
case STATE_LISTEN:
case STATE_CONNECTING:
service.deviceAddress = socket.getRemoteDevice().getAddress();
bcbluetooth.classicalServices.put(service.deviceAddress,service);
bcbluetooth.acceptServices.remove(name+uuidstr);
// 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);
}
}
}
/**
* 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 BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
private String mSocketType;
public ConnectThread(BluetoothDevice device, UUID uuid,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(uuid);
} else {
tmp = device.createInsecureRfcommSocketToServiceRecord(uuid);
}
} 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) {
Class<?> clazz = mmSocket.getRemoteDevice().getClass();
Class<?>[] paramTypes = new Class<?>[] {Integer.TYPE};
Method m;
try {
m = clazz.getMethod("createRfcommSocket", paramTypes);
Object[] params = new Object[] {Integer.valueOf(1)};
mmSocket = (BluetoothSocket) m.invoke(mmSocket.getRemoteDevice(), params);
Thread.sleep(500);
mmSocket.connect();
}
catch (NoSuchMethodException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IllegalAccessException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IllegalArgumentException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (InvocationTargetException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
try {
mmSocket.close();
} catch (IOException e2) {
// TODO Auto-generated catch block
Log.e(TAG, "unable to close() " + mSocketType + " socket during connection failure", e1);
e2.printStackTrace();
}
Log.e(TAG, e1.toString());
e1.printStackTrace();
connectionFailed();
} catch (InterruptedException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
return;
}
// Reset the ConnectThread because we're done
synchronized (BluetoothSerialService.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);
}
}
}
/**
* 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;
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[2048];
int byteNum;
// Keep listening to the InputStream while connected
while (true) {
try {
// Read from the InputStream
byteNum = mmInStream.read(buffer);
byte[] data = new byte[byteNum];
for(int i = 0;i < byteNum;i++){
data[i] = buffer[i];
}
// Send the new data String to the UI Activity
mHandler.obtainMessage(MESSAGE_READ, data).sendToTarget();
} catch (IOException e) {
Log.e(TAG, "disconnected", e);
connectionLost();
// Start the service over to restart listening mode
//BluetoothSerialService.this.start();
break;
}
}
}
/**
* Write to the connected OutStream.
* @param buffer The bytes to write
*/
public void write(byte[] buffer) {
try {
mmOutStream.write(buffer);
// Share the sent message back to the UI Activity
mHandler.obtainMessage(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);
}
}
}
private void notifyConnectionSuccess() {
if (connectCallback != null) {
PluginResult result = new PluginResult(PluginResult.Status.OK);
result.setKeepCallback(true);
connectCallback.sendPluginResult(result);
}
}
private void notifyConnectionLost() {
if (disconnectCallback != null) {
JSONObject obj = new JSONObject();
Tools.addProperty(obj, Tools.DEVICE_ADDRESS, deviceAddress);
PluginResult result = new PluginResult(PluginResult.Status.OK,obj);
result.setKeepCallback(true);
disconnectCallback.sendPluginResult(result);
}
}
private void notifyConnectionFailed() {
if (connectCallback != null) {
JSONObject obj = new JSONObject();
Tools.addProperty(obj, Tools.DEVICE_ADDRESS, deviceAddress);
connectCallback.error(obj);
connectCallback = null;
}
}
private void sendDataToSubscriber(byte[] data) {
if (data != null) {
JSONObject obj = new JSONObject();
//Tools.addProperty(obj, Tools.DEVICE_ADDRESS, deviceAddress);
Tools.addProperty(obj, Tools.VALUE, Tools.encodeBase64(data));
Tools.addProperty(obj, Tools.DATE, Tools.getDateString());
PluginResult result = new PluginResult(PluginResult.Status.OK, obj);
result.setKeepCallback(true);
dataAvailableCallback.sendPluginResult(result);
}
}
}