/*
Copyright 2015 Paweł Domagalski
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.del.android.rgb;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
public class BluetoothSerialService
{
private static final String TAG = "RGBController";
private static final boolean D = false;
// Unique UUID for this application
private static final UUID SerialPortServiceClass_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
// Member fields
private final BluetoothAdapter mAdapter;
private final Handler mHandler;
private int mState;
private ConnectThread mConnectThread;
private ConnectedThread mConnectedThread;
// Constants that indicate the current connection state
public static final int STATE_NONE = 0; // we're doing nothing
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 boolean block;
public BluetoothSerialService(Context context, Handler handler)
{
mAdapter = BluetoothAdapter.getDefaultAdapter();
mState = STATE_NONE;
mHandler = handler;
}
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 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_NONE);
}
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 connect with the given device
mConnectThread = new ConnectThread(device);
mConnectThread.start();
setState(STATE_CONNECTING);
}
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()
{
if (D)Log.i(TAG, "BEGIN mConnectedThread");
byte[] buffer = new byte[256];
int bytes;
// Keep listening to the InputStream while connected
while (true)
{
try
{
// Read from the InputStream
while(block){};
bytes = mmInStream.read(buffer);
block=true;
//if(D) Log.i(TAG, "bytes" + bytes+ " odebrane:" + odebranych);
//odebranych=odebranych+bytes;
// Send the obtained bytes to the UI Activity
mHandler.obtainMessage(mainActivity.MESSAGE_READ, bytes,-1, buffer).sendToTarget();
} catch (IOException e) {
if (D)Log.e(TAG, "disconnected", e);
connectionLost();
break;
}
}
}
public void write(byte[] buffer) {
try {
mmOutStream.write(buffer);
// Share the sent message back to the UI Activity
// mHandler.obtainMessage(mainActivity.MESSAGE_WRITE, -1, -1, buffer).sendToTarget();
} catch (IOException e) {
if (D)Log.e(TAG, "Exception during write", e);
}
}
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
if (D)Log.e(TAG, "close() of connect socket failed", e);
}
}
}
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 the
// given BluetoothDevice
try {
tmp = device.createRfcommSocketToServiceRecord(SerialPortServiceClass_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 to the BluetoothSocket
try
{
// This is a blocking call and will only return on a
// successful connection or an exception
if(D) Log.i(TAG, "mmSocket.connect");
mmSocket.connect();
} catch (IOException e)
{
connectionFailed();
// Close the socket
try {
if (D) Log.d(TAG, "mmSocket.close() in ConnectThread");
mmSocket.close();
} catch (IOException e2) {
Log.e(TAG, "unable to close() socket during connection failure", e2);
}
// Start the service over to restart listening mode
BluetoothSerialService.this.start();
return;
}
// Reset the ConnectThread because we're done
synchronized (BluetoothSerialService.this)
{
mConnectThread = null;
if(D) Log.i(TAG, "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);
}
}
}
public synchronized void stop()
{
if (D) Log.d(TAG, "stop");
if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;}
if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;}
setState(STATE_NONE);
}
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(mainActivity.MESSAGE_STATE_CHANGE, state, -1).sendToTarget();
}
private void connectionFailed()
{
setState(STATE_NONE);
if (D) Log.d(TAG, "connectionFailed()");
// Send a failure message back to the Activity
mHandler.obtainMessage(mainActivity.MESSAGE_TOAST_RINT, R.string.unable_to_connect, -1).sendToTarget();
}
/**
* Indicate that the connection was lost and notify the UI Activity.
*/
private void connectionLost()
{
setState(STATE_NONE);
if(D) Log.i(TAG, "connectionLost()");
// Send a failure message back to the Activity
mHandler.obtainMessage(mainActivity.MESSAGE_TOAST_RINT, R.string.conn_lost, -1).sendToTarget();
}
public synchronized void connected(BluetoothSocket socket, BluetoothDevice device)
{
if (D) Log.d(TAG, "connected()");
// 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(socket);
mConnectedThread.start();
// Send the name of the connected device back to the UI Activity
Message msg = mHandler.obtainMessage(mainActivity.MESSAGE_DEVICE_NAME);
Bundle bundle = new Bundle();
bundle.putString(mainActivity.DEVICE_NAME, device.getName());
msg.setData(bundle);
mHandler.sendMessage(msg);
if(D) Log.i(TAG, "connected().288 with " + device.getName());
setState(STATE_CONNECTED);
}
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);
}
}