BluetoothController.kt
import android.bluetooth.BluetoothAdapter
class BluetoothController(private val adapter: BluetoothAdapter) {
private var connectThread: ConnectThread? = null
fun connect(mac: String){
if(adapter.isEnabled && mac.isNotEmpty()){
val device = adapter.getRemoteDevice(mac)
connectThread = ConnectThread(device)
connectThread?.start()
}
}
}
ConnectThread.kt
import android.bluetooth.BluetoothDevice
import android.bluetooth.BluetoothSocket
import android.util.Log
import java.io.IOException
import java.util.*
class ConnectThread(device: BluetoothDevice) : Thread() {
private val uuid = "00001101-0000-1000-8000-00805F9B34FB"
private var mSocket: BluetoothSocket? = null
init {
try {
mSocket = device.createRfcommSocketToServiceRecord(UUID.fromString(uuid))
} catch (e: IOException){
} catch (se: SecurityException){
}
}
override fun run() {
try {
Log.d("MyLog","Connecting...")
mSocket?.connect()
Log.d("MyLog","Connected")
} catch (e: IOException){
Log.d("MyLog","Not Connected")
} catch (se: SecurityException){
}
}
fun closeConnection(){
try {
mSocket?.close()
} catch (e: IOException){
}
}
}
MainFragment.kt
import android.bluetooth.BluetoothAdapter
import android.bluetooth.BluetoothManager
import android.content.Context
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
import androidx.navigation.fragment.findNavController
import com.neco_dev.bluetoothmoduldef.databinding.FragmentMainBinding
import com.neco_dev.bt_def.BluetoothConstants
import com.neco_dev.bt_def.bluetooth.BluetoothController
class MainFragment : Fragment() {
private lateinit var binding: FragmentMainBinding
private lateinit var bluetoothController: BluetoothController
private lateinit var btAdapter: BluetoothAdapter
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View {
binding = FragmentMainBinding.inflate(inflater, container, false)
return binding.root
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
initBtAdapter()
val pref = activity?.getSharedPreferences(
BluetoothConstants.PREFERENCES, Context.MODE_PRIVATE)
val mac = pref?.getString(BluetoothConstants.MAC, "")
bluetoothController = BluetoothController(btAdapter)
binding.bList.setOnClickListener {
findNavController().navigate(R.id.action_mainFragment_to_deviceListFragment)
}
binding.bConnect.setOnClickListener {
bluetoothController.connect(mac ?: "")
}
}
private fun initBtAdapter(){
val bManager = activity?.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
btAdapter = bManager.adapter
}
}
fragment_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainFragment">
<TextView
android:id="@+id/tvStatus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="56dp"
android:text="@string/hello_first_fragment"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/bList"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="5dp"
android:layout_marginEnd="5dp"
android:text="bt list"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<Button
android:id="@+id/bConnect"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Connect"
app:layout_constraintBottom_toTopOf="@+id/bList"
app:layout_constraintEnd_toEndOf="@+id/bList"
app:layout_constraintStart_toStartOf="@+id/bList" />
</androidx.constraintlayout.widget.ConstraintLayout>