Java tutorial
/* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package activeng.pt.activenglab; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.bluetooth.BluetoothServerSocket; import android.bluetooth.BluetoothSocket; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.provider.SyncStateContract; import android.support.v4.content.LocalBroadcastManager; import android.util.Log; //import com.example.android.common.logger.Log; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.util.UUID; import activeng.pt.activenglab.data.TemperatureContract; /** * 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. */ public class BluetoothChatService { // Debugging private static final String TAG = "BluetoothChatService"; // to make sure we only unregister the receiver if it was registered before private boolean registered = false; // Name for the SDP record when creating server socket private static final String NAME_SECURE = "BluetoothChatSecure"; private static final String NAME_INSECURE = "BluetoothChatInsecure"; // Unique UUID for this application // No vou precisar disto // O Android vai participar como client bluetooth //OK private static final UUID MY_UUID_SECURE = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); private static final UUID MY_UUID_INSECURE = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); // private static final UUID MY_UUID_SECURE = // UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66"); // private static final UUID MY_UUID_INSECURE = // UUID.fromString("8ce255c0-200a-11e0-ac64-0800200c9a66"); // Member fields private final BluetoothAdapter mAdapter; //private final Handler mHandler; private AcceptThread mSecureAcceptThread; private AcceptThread mInsecureAcceptThread; private ConnectThread mConnectThread; private ConnectedThread mConnectedThread; private int mState; private int mStateProtocol = Constants.STATE_PROTOCOL_NONE; private Context mContext; private BroadcastReceiver connectionUpdates; private String deviceName; private String deviceAddress; /** * Constructor. Prepares a new BluetoothChat session. * * @param context The UI Activity Context */ //public BluetoothChatService(Context context, Handler handler) { public BluetoothChatService(Context context) { mContext = context; mAdapter = BluetoothAdapter.getDefaultAdapter(); mState = Constants.STATE_NONE; //mHandler = handler; connectionUpdates = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Bundle extras = intent.getExtras(); Log.d("ActivEng", "BluetoothChatService --> onReceive"); if (extras != null) { String message = extras.getString(Intent.EXTRA_TEXT); Log.d("ActivEng", message); write(message + "\n"); } } }; } /** * Set the current state of the chat connection * * @param state An integer defining the current connection state */ private synchronized void setState(int state) { Log.d(TAG, "setState() " + mState + " -> " + state); mState = state; // Give the new state to the Handler so the UI Activity can update // mHandler.obtainMessage(Constants.MESSAGE_STATE_CHANGE, state, -1).sendToTarget(); Intent intent = new Intent(Constants.MESSAGE_BT_STATE_CHANGE).putExtra(Intent.EXTRA_TEXT, state); //mContext.sendBroadcast(intent); LocalBroadcastManager manager = LocalBroadcastManager.getInstance(mContext); manager.sendBroadcast(intent); } /** * 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 start() { 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(Constants.STATE_LISTEN); // Start the thread to listen on a BluetoothServerSocket if (mSecureAcceptThread == null) { mSecureAcceptThread = new AcceptThread(true); mSecureAcceptThread.start(); } if (mInsecureAcceptThread == null) { mInsecureAcceptThread = new AcceptThread(false); mInsecureAcceptThread.start(); } } /** * 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, boolean secure) { Log.d(TAG, "connect to: " + device); // Cancel any thread attempting to make a connection if (mState == Constants.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, secure); mConnectThread.start(); setState(Constants.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) { 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 (mSecureAcceptThread != null) { mSecureAcceptThread.cancel(); mSecureAcceptThread = null; } if (mInsecureAcceptThread != null) { mInsecureAcceptThread.cancel(); mInsecureAcceptThread = null; } // Start the thread to manage the connection and perform transmissions mConnectedThread = new ConnectedThread(socket, socketType); mConnectedThread.start(); deviceName = device.getName(); deviceAddress = device.getAddress(); // Send the name of the connected device back to the UI Activity //Message msg = mHandler.obtainMessage(Constants.MESSAGE_DEVICE_NAME); //Bundle bundle = new Bundle(); //bundle.putString(Constants.DEVICE_NAME, device.getName()); //bundle.putString(Constants.DEVICE_ADRESS, device.getAddress()); //msg.setData(bundle); //mHandler.sendMessage(msg); //Intent intent = new Intent(Constants.MESSAGE_BT_NAME).putExtra(Intent.EXTRA_TEXT, device.getName()); //mContext.sendBroadcast(intent); Log.d("ActivEng", "BluetoothChatService BroadcastReceiver versus LocalBroadcastReceiver"); //mContext.getApplicationContext().registerReceiver(this.connectionUpdates, new IntentFilter(Constants.MESSAGE_TO_ARDUINO)); // //LocalBroadcastManager manager = LocalBroadcastManager.getInstance(mContext); //LocalBroadcastManager.getInstance(mContext.getApplicationContext()).registerReceiver(this.connectionUpdates, // new IntentFilter(Constants.MESSAGE_TO_ARDUINO)); LocalBroadcastManager manager = LocalBroadcastManager.getInstance(mContext); IntentFilter filter = new IntentFilter(Constants.MESSAGE_TO_ARDUINO); manager.registerReceiver(this.connectionUpdates, filter); registered = true; setState(Constants.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 (mSecureAcceptThread != null) { mSecureAcceptThread.cancel(); mSecureAcceptThread = null; } if (mInsecureAcceptThread != null) { mInsecureAcceptThread.cancel(); mInsecureAcceptThread = null; } deviceName = ""; deviceAddress = ""; setState(Constants.STATE_NONE); Log.d("ActivEng", "BluetoothChatService unregisterReceiver stop()"); if (registered) { //mContext.getApplicationContext().unregisterReceiver(this.connectionUpdates); //LocalBroadcastManager.getInstance(mContext.getApplicationContext()).unregisterReceiver(this.connectionUpdates); LocalBroadcastManager manager = LocalBroadcastManager.getInstance(mContext); manager.unregisterReceiver(this.connectionUpdates); registered = false; } } /** * Write to the ConnectedThread in an unsynchronized manner * * @param out The bytes to write * @see ConnectedThread#write(byte[]) */ public void write(String out) { //Log.d("ActivEng", "----> Perform the write unsynchronized"); byte[] send = out.getBytes(); //for ( int j = 0; j < send.length; j++ ) { // int v = send[j]; // Log.d("ActivEng", "send[" + j + "]=" + v); //} // Create temporary object ConnectedThread r; // Synchronize a copy of the ConnectedThread synchronized (this) { if (mState != Constants.STATE_CONNECTED) return; r = mConnectedThread; } // Perform the write unsynchronized // Log.d("ActivEng", out); r.write(send); } /** * 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(Constants.MESSAGE_TOAST); Bundle bundle = new Bundle(); bundle.putString(Constants.TOAST, "Unable to connect device"); msg.setData(bundle); mHandler.sendMessage(msg); */ Intent intent = new Intent(Constants.MESSAGE_BT_FAIL).putExtra(Intent.EXTRA_TEXT, "Unable to connect device"); //mContext.sendBroadcast(intent); LocalBroadcastManager.getInstance(mContext).sendBroadcast(intent); // Start the service over to restart listening mode BluetoothChatService.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(Constants.MESSAGE_TOAST); Bundle bundle = new Bundle(); bundle.putString(Constants.TOAST, "Device connection was lost"); msg.setData(bundle); mHandler.sendMessage(msg); */ Intent intent = new Intent(Constants.MESSAGE_BT_FAIL).putExtra(Intent.EXTRA_TEXT, "Device connection was lost"); //mContext.sendBroadcast(intent); LocalBroadcastManager.getInstance(mContext).sendBroadcast(intent); // Start the service over to restart listening mode BluetoothChatService.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; public AcceptThread(boolean secure) { BluetoothServerSocket tmp = null; mSocketType = secure ? "Secure" : "Insecure"; // Create a new listening server socket try { if (secure) { tmp = mAdapter.listenUsingRfcommWithServiceRecord(NAME_SECURE, MY_UUID_SECURE); } else { tmp = mAdapter.listenUsingInsecureRfcommWithServiceRecord(NAME_INSECURE, MY_UUID_INSECURE); } } 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 != Constants.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 (BluetoothChatService.this) { switch (mState) { case Constants.STATE_LISTEN: case Constants.STATE_CONNECTING: // Situation normal. Start the connected thread. connected(socket, socket.getRemoteDevice(), mSocketType); break; case Constants.STATE_NONE: case Constants.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 final BluetoothDevice mmDevice; private String mSocketType; public ConnectThread(BluetoothDevice device, 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(MY_UUID_SECURE); } else { tmp = device.createInsecureRfcommSocketToServiceRecord(MY_UUID_INSECURE); } } 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) { // Close the socket try { mmSocket.close(); } catch (IOException e2) { Log.e(TAG, "unable to close() " + mSocketType + " socket during connection failure", e2); } connectionFailed(); return; } // Reset the ConnectThread because we're done synchronized (BluetoothChatService.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[8192]; int bytes, pos; StringBuilder queue = new StringBuilder(""); String temp; Intent intent; // Keep listening to the InputStream while connected while (true) { try { bytes = mmInStream.read(buffer); if (bytes > 0) { String readMessage = new String(buffer, 0, bytes); queue.append(readMessage); // Log.d("Temperatura", "read() #" + Integer.toString(bytes) + " -> " + queue.substring(0, 40)); pos = queue.indexOf("\n"); while (pos >= 0) { // Log.d("Temperatura", "indexOf() #" + pos); temp = queue.substring(0, pos - 1); queue.delete(0, pos + 1); // Log.d("Temperatura", "limpa() #" + " -> " + temp); // mHandler.obtainMessage(Constants.MESSAGE_READ, 0, 0, temp).sendToTarget(); Log.d("ActivEng", "sendBroadcast " + temp); if (temp.length() > 1) { switch (temp.charAt(0)) { case 'R': Temperature tempObj = UtilitySingleton.getInstance() .processAndSaveMessage(mContext, temp, deviceAddress, mStateProtocol); intent = new Intent(Constants.MESSAGE_TEMPERATURE); intent.putExtra(Constants.EXTRA_MSG_TEMP, tempObj.getRead()); intent.putExtra(Constants.EXTRA_MSG_TEMP_STR, tempObj.getReadString()); intent.putExtra(Constants.EXTRA_MSG_TEMP_SENSOR, tempObj.getReadSensor()); intent.putExtra(Constants.EXTRA_MSG_TEMP_MILLIS, tempObj.getReadMillis()); LocalBroadcastManager.getInstance(mContext).sendBroadcast(intent); break; case 'M': mStateProtocol = Constants.STATE_PROTOCOL_METADATA; intent = new Intent(Constants.MESSAGE_METADATA).putExtra(Intent.EXTRA_TEXT, temp); //mContext.sendBroadcast(intent); LocalBroadcastManager.getInstance(mContext).sendBroadcast(intent); break; case 'S': intent = new Intent(Constants.MESSAGE_SENSORMETADATA) .putExtra(Intent.EXTRA_TEXT, temp); //mContext.sendBroadcast(intent); LocalBroadcastManager.getInstance(mContext).sendBroadcast(intent); break; case 'T': mStateProtocol = Constants.STATE_PROTOCOL_TIME; intent = new Intent(Constants.MESSAGE_CLOCK).putExtra(Intent.EXTRA_TEXT, temp); //mContext.sendBroadcast(intent); LocalBroadcastManager.getInstance(mContext).sendBroadcast(intent); break; default: break; } } pos = queue.indexOf("\n"); } } } catch (IOException e) { Log.e(TAG, "disconnected", e); connectionLost(); // Start the service over to restart listening mode BluetoothChatService.this.start(); break; } } } /** * Write to the connected OutStream. * * @param buffer The bytes to write */ public void write(byte[] buffer) { try { // mmOutStream.write(buffer); mmOutStream.write(buffer, 0, buffer.length); mmOutStream.flush(); // Share the sent message back to the UI Activity // mHandler.obtainMessage(Constants.MESSAGE_WRITE, -1, -1, buffer).sendToTarget(); Log.d("ActivEng", "----> WRITE " + buffer.length + " Done!"); } 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); } } } }