adding bluetooth
Zhengyu Peng
3 years ago
parent
e745dabe6e
commit
4e66b26b8b
@ -0,0 +1,540 @@
|
||||
package com.rookiedev.hexapod.network
|
||||
|
||||
import android.Manifest
|
||||
import android.annotation.SuppressLint
|
||||
import android.bluetooth.BluetoothAdapter
|
||||
import android.bluetooth.BluetoothDevice
|
||||
import android.bluetooth.BluetoothServerSocket
|
||||
import android.bluetooth.BluetoothSocket
|
||||
import android.content.Context
|
||||
import android.content.pm.PackageManager
|
||||
import android.os.Bundle
|
||||
import android.os.Handler
|
||||
import androidx.core.app.ActivityCompat
|
||||
import java.io.IOException
|
||||
import java.io.InputStream
|
||||
import java.io.OutputStream
|
||||
import java.util.*
|
||||
|
||||
|
||||
/**
|
||||
* 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.
|
||||
*/
|
||||
class BluetoothChatService(context: Context?, handler: Handler) {
|
||||
// Member fields
|
||||
private val mAdapter: BluetoothAdapter
|
||||
private val mHandler: Handler
|
||||
private var mSecureAcceptThread: AcceptThread? = null
|
||||
private var mInsecureAcceptThread: AcceptThread? = null
|
||||
private var mConnectThread: ConnectThread? = null
|
||||
private var mConnectedThread: ConnectedThread? = null
|
||||
|
||||
/**
|
||||
* Return the current connection state.
|
||||
*/
|
||||
@get:Synchronized
|
||||
var mState: Int
|
||||
private set
|
||||
private var mNewState: Int
|
||||
|
||||
/**
|
||||
* Update UI title according to the current state of the chat connection
|
||||
*/
|
||||
@Synchronized
|
||||
private fun updateUserInterfaceTitle() {
|
||||
mState = mState
|
||||
// Log.d(TAG, "updateUserInterfaceTitle() " + mNewState + " -> " + state)
|
||||
mNewState = mState
|
||||
|
||||
// Give the new state to the Handler so the UI Activity can update
|
||||
mHandler.obtainMessage(Constants.MESSAGE_STATE_CHANGE, mNewState, -1).sendToTarget()
|
||||
}
|
||||
|
||||
/**
|
||||
* Start the chat service. Specifically start AcceptThread to begin a
|
||||
* session in listening (server) mode. Called by the Activity onResume()
|
||||
*/
|
||||
@Synchronized
|
||||
fun 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
|
||||
}
|
||||
|
||||
// Start the thread to listen on a BluetoothServerSocket
|
||||
if (mSecureAcceptThread == null) {
|
||||
mSecureAcceptThread = AcceptThread(true)
|
||||
mSecureAcceptThread!!.start()
|
||||
}
|
||||
if (mInsecureAcceptThread == null) {
|
||||
mInsecureAcceptThread = AcceptThread(false)
|
||||
mInsecureAcceptThread!!.start()
|
||||
}
|
||||
// Update UI title
|
||||
updateUserInterfaceTitle()
|
||||
}
|
||||
|
||||
/**
|
||||
* 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)
|
||||
*/
|
||||
@Synchronized
|
||||
fun connect(device: BluetoothDevice, secure: Boolean) {
|
||||
// Log.d(TAG, "connect to: $device")
|
||||
|
||||
// Cancel any thread attempting to make a connection
|
||||
if (mState == STATE_CONNECTING) {
|
||||
if (mConnectThread != null) {
|
||||
mConnectThread!!.cancel()
|
||||
mConnectThread = null
|
||||
}
|
||||
}
|
||||
|
||||
// Cancel any thread currently running a connection
|
||||
if (mConnectedThread != null) {
|
||||
mConnectedThread!!.cancel()
|
||||
mConnectedThread = null
|
||||
}
|
||||
|
||||
// Start the thread to connect with the given device
|
||||
mConnectThread = ConnectThread(device, secure)
|
||||
mConnectThread!!.start()
|
||||
// Update UI title
|
||||
updateUserInterfaceTitle()
|
||||
}
|
||||
|
||||
/**
|
||||
* Start the ConnectedThread to begin managing a Bluetooth connection
|
||||
*
|
||||
* @param socket The BluetoothSocket on which the connection was made
|
||||
* @param device The BluetoothDevice that has been connected
|
||||
*/
|
||||
@SuppressLint("MissingPermission")
|
||||
@Synchronized
|
||||
fun connected(socket: BluetoothSocket?, device: BluetoothDevice, socketType: String) {
|
||||
// Log.d(TAG, "connected, Socket Type:$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 = ConnectedThread(socket, socketType)
|
||||
mConnectedThread!!.start()
|
||||
|
||||
// Send the name of the connected device back to the UI Activity
|
||||
val msg = mHandler.obtainMessage(Constants.MESSAGE_DEVICE_NAME)
|
||||
val bundle = Bundle()
|
||||
bundle.putString(Constants.DEVICE_NAME, device.name)
|
||||
msg.data = bundle
|
||||
mHandler.sendMessage(msg)
|
||||
// Update UI title
|
||||
updateUserInterfaceTitle()
|
||||
}
|
||||
|
||||
/**
|
||||
* Stop all threads
|
||||
*/
|
||||
@Synchronized
|
||||
fun 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
|
||||
}
|
||||
mState = STATE_NONE
|
||||
// Update UI title
|
||||
updateUserInterfaceTitle()
|
||||
}
|
||||
|
||||
/**
|
||||
* Write to the ConnectedThread in an unsynchronized manner
|
||||
*
|
||||
* @param out The bytes to write
|
||||
* @see ConnectedThread.write
|
||||
*/
|
||||
fun write(out: ByteArray?) {
|
||||
// Create temporary object
|
||||
var r: ConnectedThread?
|
||||
// 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 fun connectionFailed() {
|
||||
// Send a failure message back to the Activity
|
||||
val msg = mHandler.obtainMessage(Constants.MESSAGE_TOAST)
|
||||
val bundle = Bundle()
|
||||
bundle.putString(Constants.TOAST, "Unable to connect device")
|
||||
msg.data = bundle
|
||||
mHandler.sendMessage(msg)
|
||||
mState = STATE_NONE
|
||||
// Update UI title
|
||||
updateUserInterfaceTitle()
|
||||
|
||||
// Start the service over to restart listening mode
|
||||
start()
|
||||
}
|
||||
|
||||
/**
|
||||
* Indicate that the connection was lost and notify the UI Activity.
|
||||
*/
|
||||
private fun connectionLost() {
|
||||
// Send a failure message back to the Activity
|
||||
val msg = mHandler.obtainMessage(Constants.MESSAGE_TOAST)
|
||||
val bundle = Bundle()
|
||||
bundle.putString(Constants.TOAST, "Device connection was lost")
|
||||
msg.data = bundle
|
||||
mHandler.sendMessage(msg)
|
||||
mState = STATE_NONE
|
||||
// Update UI title
|
||||
updateUserInterfaceTitle()
|
||||
|
||||
// Start the service over to restart listening mode
|
||||
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).
|
||||
*/
|
||||
@SuppressLint("MissingPermission")
|
||||
private inner class AcceptThread(secure: Boolean) : Thread() {
|
||||
// The local server socket
|
||||
private val mmServerSocket: BluetoothServerSocket?
|
||||
private val mSocketType: String
|
||||
override fun run() {
|
||||
// Log.d(
|
||||
// TAG, "Socket Type: " + mSocketType +
|
||||
// "BEGIN mAcceptThread" + this
|
||||
// )
|
||||
name = "AcceptThread$mSocketType"
|
||||
var socket: BluetoothSocket?
|
||||
|
||||
// Listen to the server socket if we're not connected
|
||||
while (mState != STATE_CONNECTED) {
|
||||
socket = try {
|
||||
// This is a blocking call and will only return on a
|
||||
// successful connection or an exception
|
||||
mmServerSocket!!.accept()
|
||||
} catch (e: IOException) {
|
||||
// Log.e(TAG, "Socket Type: " + mSocketType + "accept() failed", e)
|
||||
break
|
||||
}
|
||||
|
||||
// If a connection was accepted
|
||||
if (socket != null) {
|
||||
synchronized(this@BluetoothChatService) {
|
||||
when (mState) {
|
||||
STATE_LISTEN, STATE_CONNECTING -> // Situation normal. Start the connected thread.
|
||||
connected(
|
||||
socket, socket.remoteDevice,
|
||||
mSocketType
|
||||
)
|
||||
STATE_NONE, STATE_CONNECTED -> // Either not ready or already connected. Terminate new socket.
|
||||
try {
|
||||
socket.close()
|
||||
} catch (e: IOException) {
|
||||
// Log.e(
|
||||
// TAG,
|
||||
// "Could not close unwanted socket",
|
||||
// e
|
||||
// )
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
// Log.i(
|
||||
// TAG,
|
||||
// "END mAcceptThread, socket Type: $mSocketType"
|
||||
// )
|
||||
}
|
||||
|
||||
fun cancel() {
|
||||
// Log.d(TAG, "Socket Type" + mSocketType + "cancel " + this)
|
||||
try {
|
||||
mmServerSocket!!.close()
|
||||
} catch (e: IOException) {
|
||||
// Log.e(TAG, "Socket Type" + mSocketType + "close() of server failed", e)
|
||||
}
|
||||
}
|
||||
|
||||
init {
|
||||
var tmp: BluetoothServerSocket? = null
|
||||
mSocketType = if (secure) "Secure" else "Insecure"
|
||||
|
||||
// Create a new listening server socket
|
||||
try {
|
||||
tmp = if (secure) {
|
||||
mAdapter.listenUsingRfcommWithServiceRecord(
|
||||
NAME_SECURE,
|
||||
MY_UUID_SECURE
|
||||
)
|
||||
} else {
|
||||
mAdapter.listenUsingInsecureRfcommWithServiceRecord(
|
||||
NAME_INSECURE, MY_UUID_INSECURE
|
||||
)
|
||||
}
|
||||
} catch (e: IOException) {
|
||||
// Log.e(TAG, "Socket Type: " + mSocketType + "listen() failed", e)
|
||||
}
|
||||
mmServerSocket = tmp
|
||||
mState = STATE_LISTEN
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* This thread runs while attempting to make an outgoing connection
|
||||
* with a device. It runs straight through; the connection either
|
||||
* succeeds or fails.
|
||||
*/
|
||||
@SuppressLint("MissingPermission")
|
||||
private inner class ConnectThread(private val mmDevice: BluetoothDevice, secure: Boolean) :
|
||||
Thread() {
|
||||
private val mmSocket: BluetoothSocket?
|
||||
private val mSocketType: String
|
||||
override fun run() {
|
||||
// Log.i(
|
||||
// TAG,
|
||||
// "BEGIN mConnectThread SocketType:$mSocketType"
|
||||
// )
|
||||
name = "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 (e: IOException) {
|
||||
// Close the socket
|
||||
try {
|
||||
mmSocket!!.close()
|
||||
} catch (e2: IOException) {
|
||||
// Log.e(
|
||||
// TAG, "unable to close() " + mSocketType +
|
||||
// " socket during connection failure", e2
|
||||
// )
|
||||
}
|
||||
connectionFailed()
|
||||
return
|
||||
}
|
||||
|
||||
// Reset the ConnectThread because we're done
|
||||
synchronized(this@BluetoothChatService) { mConnectThread = null }
|
||||
|
||||
// Start the connected thread
|
||||
connected(mmSocket, mmDevice, mSocketType)
|
||||
}
|
||||
|
||||
fun cancel() {
|
||||
try {
|
||||
mmSocket!!.close()
|
||||
} catch (e: IOException) {
|
||||
// Log.e(
|
||||
// TAG,
|
||||
// "close() of connect $mSocketType socket failed", e
|
||||
// )
|
||||
}
|
||||
}
|
||||
|
||||
init {
|
||||
var tmp: BluetoothSocket? = null
|
||||
mSocketType = if (secure) "Secure" else "Insecure"
|
||||
|
||||
// Get a BluetoothSocket for a connection with the
|
||||
// given BluetoothDevice
|
||||
try {
|
||||
tmp = if (secure) {
|
||||
// if (ActivityCompat.checkSelfPermission(
|
||||
// this,
|
||||
// Manifest.permission.BLUETOOTH_CONNECT
|
||||
// ) != PackageManager.PERMISSION_GRANTED
|
||||
// ) {
|
||||
// // TODO: Consider calling
|
||||
// // ActivityCompat#requestPermissions
|
||||
// // here to request the missing permissions, and then overriding
|
||||
// // public void onRequestPermissionsResult(int requestCode, String[] permissions,
|
||||
// // int[] grantResults)
|
||||
// // to handle the case where the user grants the permission. See the documentation
|
||||
// // for ActivityCompat#requestPermissions for more details.
|
||||
// return
|
||||
// }
|
||||
mmDevice.createRfcommSocketToServiceRecord(
|
||||
MY_UUID_SECURE
|
||||
)
|
||||
} else {
|
||||
mmDevice.createInsecureRfcommSocketToServiceRecord(
|
||||
MY_UUID_INSECURE
|
||||
)
|
||||
}
|
||||
} catch (e: IOException) {
|
||||
// Log.e(TAG, "Socket Type: " + mSocketType + "create() failed", e)
|
||||
}
|
||||
mmSocket = tmp
|
||||
mState = STATE_CONNECTING
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* This thread runs during a connection with a remote device.
|
||||
* It handles all incoming and outgoing transmissions.
|
||||
*/
|
||||
private inner class ConnectedThread(socket: BluetoothSocket?, socketType: String) :
|
||||
Thread() {
|
||||
private val mmSocket: BluetoothSocket?
|
||||
private val mmInStream: InputStream?
|
||||
private val mmOutStream: OutputStream?
|
||||
override fun run() {
|
||||
// Log.i(TAG, "BEGIN mConnectedThread")
|
||||
val buffer = ByteArray(1024)
|
||||
var bytes: Int
|
||||
|
||||
// Keep listening to the InputStream while connected
|
||||
while (mState == STATE_CONNECTED) {
|
||||
try {
|
||||
// Read from the InputStream
|
||||
bytes = mmInStream!!.read(buffer)
|
||||
|
||||
// Send the obtained bytes to the UI Activity
|
||||
mHandler.obtainMessage(Constants.MESSAGE_READ, bytes, -1, buffer)
|
||||
.sendToTarget()
|
||||
} catch (e: IOException) {
|
||||
// Log.e(TAG, "disconnected", e)
|
||||
connectionLost()
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Write to the connected OutStream.
|
||||
*
|
||||
* @param buffer The bytes to write
|
||||
*/
|
||||
fun write(buffer: ByteArray?) {
|
||||
try {
|
||||
mmOutStream!!.write(buffer)
|
||||
|
||||
// Share the sent message back to the UI Activity
|
||||
mHandler.obtainMessage(Constants.MESSAGE_WRITE, -1, -1, buffer)
|
||||
.sendToTarget()
|
||||
} catch (e: IOException) {
|
||||
// Log.e(TAG, "Exception during write", e)
|
||||
}
|
||||
}
|
||||
|
||||
fun cancel() {
|
||||
try {
|
||||
mmSocket!!.close()
|
||||
} catch (e: IOException) {
|
||||
// Log.e(TAG, "close() of connect socket failed", e)
|
||||
}
|
||||
}
|
||||
|
||||
init {
|
||||
// Log.d(TAG, "create ConnectedThread: $socketType")
|
||||
mmSocket = socket
|
||||
var tmpIn: InputStream? = null
|
||||
var tmpOut: OutputStream? = null
|
||||
|
||||
// Get the BluetoothSocket input and output streams
|
||||
try {
|
||||
tmpIn = socket!!.inputStream
|
||||
tmpOut = socket.outputStream
|
||||
} catch (e: IOException) {
|
||||
// Log.e(TAG, "temp sockets not created", e)
|
||||
}
|
||||
mmInStream = tmpIn
|
||||
mmOutStream = tmpOut
|
||||
mState = STATE_CONNECTED
|
||||
}
|
||||
}
|
||||
|
||||
companion object {
|
||||
// Debugging
|
||||
private const val TAG = "BluetoothChatService"
|
||||
|
||||
// Name for the SDP record when creating server socket
|
||||
private const val NAME_SECURE = "BluetoothChatSecure"
|
||||
private const val NAME_INSECURE = "BluetoothChatInsecure"
|
||||
|
||||
// Unique UUID for this application
|
||||
private val MY_UUID_SECURE = UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66")
|
||||
private val MY_UUID_INSECURE = UUID.fromString("8ce255c0-200a-11e0-ac64-0800200c9a66")
|
||||
|
||||
// Constants that indicate the current connection state
|
||||
const val STATE_NONE = 0 // we're doing nothing
|
||||
const val STATE_LISTEN = 1 // now listening for incoming connections
|
||||
const val STATE_CONNECTING = 2 // now initiating an outgoing connection
|
||||
const val STATE_CONNECTED = 3 // now connected to a remote device
|
||||
}
|
||||
|
||||
/**
|
||||
* Constructor. Prepares a new BluetoothChat session.
|
||||
*
|
||||
* @param context The UI Activity Context
|
||||
* @param handler A Handler to send messages back to the UI Activity
|
||||
*/
|
||||
init {
|
||||
mAdapter = BluetoothAdapter.getDefaultAdapter()
|
||||
mState = STATE_NONE
|
||||
mNewState = mState
|
||||
mHandler = handler
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,19 @@
|
||||
package com.rookiedev.hexapod.network
|
||||
|
||||
/**
|
||||
* Defines several constants used between [BluetoothChatService] and the UI.
|
||||
*/
|
||||
interface Constants {
|
||||
companion object {
|
||||
// Message types sent from the BluetoothChatService Handler
|
||||
const val MESSAGE_STATE_CHANGE = 1
|
||||
const val MESSAGE_READ = 2
|
||||
const val MESSAGE_WRITE = 3
|
||||
const val MESSAGE_DEVICE_NAME = 4
|
||||
const val MESSAGE_TOAST = 5
|
||||
|
||||
// Key names received from the BluetoothChatService Handler
|
||||
const val DEVICE_NAME = "device_name"
|
||||
const val TOAST = "toast"
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue