Получение данных от Bluetooth в Android Studio (Java)

package com.example.sharm1;
import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;
import android.bluetooth.BluetoothSocket;
import android.os.Handler;
import android.util.Log;
import android.widget.TextView;
import androidx.core.app.ActivityCompat;
 
public class MainActivity extends Activity {
TextView txtResult;
Handler h;
private static final String TAG = "bluetooth2";
private static final int REQUEST_ENABLE_BT = 1;
final int RECIEVE_MESSAGE = 1;
private BluetoothAdapter btAdapter = null;
private BluetoothSocket btSocket;
private ConnectedThread mConnectedThread;
private StringBuilder sb = new StringBuilder();
 
// SPP UUID сервиса
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
// MAC-адрес Bluetooth модуля
private static String address = "9C:28:40:09:B1:9A";
 
String msg_exemple;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
 
setContentView(R.layout.activity_main);
txtResult = (TextView) findViewById(R.id.txtResult); // для вывода текста, полученного по Bluetooth от внешнего устройства
h = new Handler() {
public void handleMessage(android.os.Message msg) {
txtResult.setText(msg_exemple);
}
};
btAdapter = BluetoothAdapter.getDefaultAdapter(); // получаем локальный Bluetooth адаптер
checkBTState();
}
 
public void onPause() {
super.onPause();
 
Log.d(TAG, "In onPause()...");
 
try {
btSocket.close();
} catch (IOException e2) {
errorExit("Fatal Error", "In onPause() and failed to close socket." + e2.getMessage() + ".");
}
}
@Override
public void onResume{
super.onResume();
 
Log.d(TAG, "попытка соединения...");
 
BluetoothDevice device = btAdapter.getRemoteDevice(address);
 
// MAC адрес, который мы ввели выше.
 
try {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
 
return();
}
btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
errorExit("Error", "Создать соединение не удалось " + e.getMessage() + ".");
}
 
btAdapter.cancelDiscovery();
// Establish the connection. This will block until it connects.
Log.d(TAG, "Соединяемся...");
try {
btSocket.connect();
Log.d(TAG, "...Соединение установлено и готово к передаче данных...");
} catch (IOException e) {
try {
btSocket.close();
} catch (IOException e2) {
errorExit("Fatal Error", "In onResume() and unable to close socket during connection failure" + e2.getMessage() + ".");
}
}
// Create a data stream so we can talk to server.
Log.d(TAG, "Создание Socket...");
 
mConnectedThread = new ConnectedThread(btSocket);
mConnectedThread.start();
}
 
@Override
private void checkBTState() {
 
if(btAdapter==null) {
errorExit("Fatal Error", "Bluetooth не поддерживается");
} else {
if (btAdapter.isEnabled()) {
Log.d(TAG, "...Bluetooth включен...");
} else {
Intent enableBtIntent = new Intent(btAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
}
}
// private void errorExit(String title, String message){
// Toast.makeText(getBaseContext(), title + " - " + message, Toast.LENGTH_LONG).show();
// finish();
 
private 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) { }
 
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
 
public void run() {
while (true) {
try {
int bytes = mmInStream.available();
if (bytes == 0)
{
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
Log.d(TAG, "Ошибка приостановки потока");
}
continue;
}
byte[] buffer = new byte[bytes]; // buffer store for the stream
 
// Read from the InputStream
bytes = mmInStream.read(buffer); // Получаем кол-во байт и само собщение в байтовый массив "buffer"
Log.d(TAG, "Buffer ="+Arrays.toString(buffer));
msg_exemple = Arrays.toString(buffer);
h.obtainMessage(RECIEVE_MESSAGE, bytes, -1, buffer).sendToTarget(); // Отправляем в очередь сообщений Handler
} catch (IOException e) {
Log.d(TAG, "Some error: Buffer");
break;
}
}
}
//Отправляем данные на Bluetooth-устройство:
public void write(String message) {
Log.d(TAG, "Данные для отправки: " + message + "...");
byte[] msgBuffer = message.getBytes();
try {
mmOutStream.write(msgBuffer);
} catch (IOException e) {
Log.d(TAG, "Ошибка отправки данных: " + e.getMessage() + "...");
}
}
 
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
}
}