package com.menthoven.arduinoandroid;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;
/**
* Created by da Ent on 1-11-2015.
*/
public class BluetoothService {
private Handler myHandler;
private int state;
BluetoothDevice myDevice;
ConnectThread connectThread;
ConnectedThread connectedThread;
public BluetoothService(Handler handler, BluetoothDevice device) {
state = Constants.STATE_NONE;
myHandler = handler;
myDevice = device;
}
public synchronized void connect() {
Log.d(Constants.TAG, "Connecting to: " + myDevice.getName() + " - " + myDevice.getAddress());
// Start the thread to connect with the given device
setState(Constants.STATE_CONNECTING);
connectThread = new ConnectThread(myDevice);
connectThread.start();
}
public synchronized void stop() {
cancelConnectThread();
cancelConnectedThread();
setState(Constants.STATE_NONE);
}
private synchronized void setState(int state) {
Log.d(Constants.TAG, "setState() " + this.state + " -> " + state);
this.state = state;
// Give the new state to the Handler so the UI Activity can update
myHandler.obtainMessage(Constants.MESSAGE_STATE_CHANGE, state, -1).sendToTarget();
}
public synchronized int getState() {
return state;
}
public synchronized void connected(BluetoothSocket socket, BluetoothDevice device) {
Log.d(Constants.TAG, "connected to: " + device.getName());
cancelConnectThread();
// Start the thread to manage the connection and perform transmissions
connectedThread = new ConnectedThread(socket);
connectedThread.start();
setState(Constants.STATE_CONNECTED);
}
/**
* Indicate that the connection attempt failed and notify the UI Activity.
*/
private void connectionFailed() {
Log.e(Constants.TAG, "Connection Failed");
// Send a failure item_message back to the Activity
Message msg = myHandler.obtainMessage(Constants.MESSAGE_SNACKBAR);
Bundle bundle = new Bundle();
bundle.putString(Constants.SNACKBAR, "Unable to connect");
msg.setData(bundle);
myHandler.sendMessage(msg);
setState(Constants.STATE_ERROR);
cancelConnectThread();
}
/**
* Indicate that the connection was lost and notify the UI Activity.
*/
private void connectionLost() {
Log.e(Constants.TAG, "Connection Lost");
// Send a failure item_message back to the Activity
Message msg = myHandler.obtainMessage(Constants.MESSAGE_SNACKBAR);
Bundle bundle = new Bundle();
bundle.putString(Constants.SNACKBAR, "Cconnection was lost");
msg.setData(bundle);
myHandler.sendMessage(msg);
setState(Constants.STATE_ERROR);
cancelConnectedThread();
}
private void cancelConnectThread() {
// Cancel the thread that completed the connection
if (connectThread != null) {
connectThread.cancel();
connectThread = null;
}
}
private void cancelConnectedThread() {
// Cancel any thread currently running a connection
if (connectedThread != null) {
connectedThread.cancel();
connectedThread = null;
}
}
public void write(byte[] out) {
// Create temporary object
ConnectedThread r;
// Synchronize a copy of the ConnectedThread
synchronized (this) {
if (state != Constants.STATE_CONNECTED) {
Log.e(Constants.TAG, "Trying to send but not connected");
return;
}
r = connectedThread;
}
// Perform the write unsynchronized
r.write(out);
}
private class ConnectThread extends Thread {
private final BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
public ConnectThread(BluetoothDevice device) {
// Use a temporary object that is later assigned to mmSocket,
// because mmSocket is final
BluetoothSocket tmp = null;
mmDevice = device;
// Get a BluetoothSocket to connect with the given BluetoothDevice
try {
// MY_UUID is the app's UUID string, also used by the server code
UUID uuid = Constants.myUUID;
tmp = device.createRfcommSocketToServiceRecord(uuid);
} catch (IOException e) {
Log.e(Constants.TAG, "Create RFcomm socket failed", e);
}
mmSocket = tmp;
}
public void run() {
try {
// Connect the device through the socket. This will block
// until it succeeds or throws an exception
mmSocket.connect();
} catch (IOException connectException) {
// Unable to connect; close the socket and get out
Log.e(Constants.TAG, "Unable to connect", connectException);
try {
mmSocket.close();
} catch (IOException closeException) {
Log.e(Constants.TAG, "Unable to close() socket during connection failure", closeException);
}
connectionFailed();
return;
}
synchronized (BluetoothService.this) {
connectThread = null;
}
// Do work to manage the connection (in a separate thread)
connected(mmSocket, mmDevice);
}
/** Will cancel an in-progress connection, and close the socket */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
Log.e(Constants.TAG, "Close() socket failed", e);
}
}
}
public class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket) {
mmSocket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;
// Get the input and output streams, using temp objects because
// member streams are final
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) {
Log.e(Constants.TAG, "Temp sockets not created", e);
}
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
Log.i(Constants.TAG, "Begin connectedThread");
byte[] buffer = new byte[1024]; // buffer store for the stream
int bytes; // bytes returned from read()
StringBuilder readMessage = new StringBuilder();
// Keep listening to the InputStream until an exception occurs
while (true) {
try {
bytes = mmInStream.read(buffer);
String read = new String(buffer, 0, bytes);
readMessage.append(read);
if (read.contains("\n")) {
myHandler.obtainMessage(Constants.MESSAGE_READ, bytes, -1, readMessage.toString()).sendToTarget();
readMessage.setLength(0);
}
} catch (IOException e) {
Log.e(Constants.TAG, "Connection Lost", e);
connectionLost();
break;
}
}
}
/* Call this from the main activity to send data to the remote device */
public void write(byte[] bytes) {
try {
mmOutStream.write(bytes);
myHandler.obtainMessage(Constants.MESSAGE_WRITE, -1, -1, bytes).sendToTarget();
} catch (IOException e) {
Log.e(Constants.TAG, "Exception during write", e);
}
}
/* Call this from the main activity to shutdown the connection */
/** Will cancel an in-progress connection, and close the socket */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
Log.e(Constants.TAG, "close() of connect socket failed", e);}
}
}
}
