Могу ли я отправить данные на модуль ble 4.2 или ble 5 после сопряжения, как bluetooth classic, и без использования соединения GATT

Мое конечное устройство - это модуль BLE 4.0, BLE 4.2 или BLE 5.

Android рекомендует использовать соединение GATT для отправки данных на устройства BLE согласно этой ссылке: https://developer.android.com/guide/topics/connectivity/bluetooth-le

Мой вопрос: если я соединил свой телефон с модулем ble 4.2 / 5 из приложения «Настройки» в телефоне Android, тогда могу ли я отправить данные в модуль ble, используя тот же процесс и код, которые используются в Bluetooth Classic: https://developer.android.com/guide/topics/connectivity/bluetooth

пример:

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
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.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.Set;
import java.util.UUID;

public class BluetoothService {
    private static final String TAG = "BluetoothService";
    private static final boolean D = true;
    public static final int MESSAGE_STATE_CHANGE = 1;
    public static final int MESSAGE_READ = 2;
    public static final int MESSAGE_WRITE = 3;
    public static final int MESSAGE_DEVICE_NAME = 4;
    public static final int MESSAGE_CONNECTION_LOST = 5;
    public static final int MESSAGE_UNABLE_CONNECT = 6;
    private static final String NAME = "BTPrinter";
    private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
    private final BluetoothAdapter mAdapter = BluetoothAdapter.getDefaultAdapter();
    private final Handler mHandler;
    private BluetoothService.AcceptThread mAcceptThread;
    private BluetoothService.ConnectThread mConnectThread;
    private BluetoothService.ConnectedThread mConnectedThread;
    private int mState = 0;
    public static final int STATE_NONE = 0;
    public static final int STATE_LISTEN = 1;
    public static final int STATE_CONNECTING = 2;
    public static final int STATE_CONNECTED = 3;

    public BluetoothService(Context context, Handler handler) {
        this.mHandler = handler;
    }

    public synchronized boolean isAvailable() {
        return this.mAdapter != null;
    }

    public synchronized boolean isBTopen() {
        return this.mAdapter.isEnabled();
    }

    public synchronized BluetoothDevice getDevByMac(String mac) {
        return this.mAdapter.getRemoteDevice(mac);
    }

    public synchronized BluetoothDevice getDevByName(String name) {
        BluetoothDevice tem_dev = null;
        Set pairedDevices = this.getPairedDev();
        if(pairedDevices.size() > 0) {
            Iterator var5 = pairedDevices.iterator();

            while(var5.hasNext()) {
                BluetoothDevice device = (BluetoothDevice)var5.next();
                if(device.getName().indexOf(name) != -1) {
                    tem_dev = device;
                    break;
                }
            }
        }

        return tem_dev;
    }

    public synchronized void sendMessage(String message, String charset) {
        if(message.length() > 0) {
            byte[] send;
            try {
                send = message.getBytes(charset);
            } catch (UnsupportedEncodingException var5) {
                send = message.getBytes();
            }

            this.write(send);
            byte[] tail = new byte[]{10, 13, 0};
            this.write(tail);
        }

    }

    public synchronized Set<BluetoothDevice> getPairedDev() {
        Set dev = null;
        dev = this.mAdapter.getBondedDevices();
        return dev;
    }

    public synchronized boolean cancelDiscovery() {
        return this.mAdapter.cancelDiscovery();
    }

    public synchronized boolean isDiscovering() {
        return this.mAdapter.isDiscovering();
    }

    public synchronized boolean startDiscovery() {
        return this.mAdapter.startDiscovery();
    }

    private synchronized void setState(int state) {
        this.mState = state;
        this.mHandler.obtainMessage(1, state, -1).sendToTarget();
    }

    public synchronized int getState() {
        return this.mState;
    }

    public synchronized void start() {
        Log.d("BluetoothService", "start");
        if(this.mConnectThread != null) {
            this.mConnectThread.cancel();
            this.mConnectThread = null;
        }

        if(this.mConnectedThread != null) {
            this.mConnectedThread.cancel();
            this.mConnectedThread = null;
        }

        if(this.mAcceptThread == null) {
            this.mAcceptThread = new BluetoothService.AcceptThread();
            this.mAcceptThread.start();
        }

        this.setState(1);
    }

    public synchronized void connect(BluetoothDevice device) {
        Log.d("BluetoothService", "connect to: " + device);
        if(this.mState == 2 && this.mConnectThread != null) {
            this.mConnectThread.cancel();
            this.mConnectThread = null;
        }

        if(this.mConnectedThread != null) {
            this.mConnectedThread.cancel();
            this.mConnectedThread = null;
        }

        this.mConnectThread = new BluetoothService.ConnectThread(device);
        this.mConnectThread.start();
        this.setState(2);
    }

    public synchronized void connected(BluetoothSocket socket, BluetoothDevice device) {
        Log.d("BluetoothService", "connected");
        if(this.mConnectThread != null) {
            this.mConnectThread.cancel();
            this.mConnectThread = null;
        }

        if(this.mConnectedThread != null) {
            this.mConnectedThread.cancel();
            this.mConnectedThread = null;
        }

        if(this.mAcceptThread != null) {
            this.mAcceptThread.cancel();
            this.mAcceptThread = null;
        }

        this.mConnectedThread = new BluetoothService.ConnectedThread(socket);
        this.mConnectedThread.start();
        Message msg = this.mHandler.obtainMessage(4);
        this.mHandler.sendMessage(msg);
        this.setState(3);
    }

    public synchronized void stop() {
        Log.d("BluetoothService", "stop");
        this.setState(0);
        if(this.mConnectThread != null) {
            this.mConnectThread.cancel();
            this.mConnectThread = null;
        }

        if(this.mConnectedThread != null) {
            this.mConnectedThread.cancel();
            this.mConnectedThread = null;
        }

        if(this.mAcceptThread != null) {
            this.mAcceptThread.cancel();
            this.mAcceptThread = null;
        }

    }

    public void write(byte[] out) {
        BluetoothService.ConnectedThread r;
        synchronized(this) {
            if(this.mState != 3) {
                return;
            }

            r = this.mConnectedThread;
        }

        r.write(out);
    }

    private void connectionFailed() {
        this.setState(1);
        Message msg = this.mHandler.obtainMessage(6);
        this.mHandler.sendMessage(msg);
    }

    private void connectionLost() {
        Message msg = this.mHandler.obtainMessage(5);
        this.mHandler.sendMessage(msg);
    }

    private class AcceptThread extends Thread {
        private final BluetoothServerSocket mmServerSocket;

        public AcceptThread() {
            BluetoothServerSocket tmp = null;

            try {
                tmp = BluetoothService.this.mAdapter.listenUsingRfcommWithServiceRecord("BTPrinter", BluetoothService.MY_UUID);
            } catch (IOException var4) {
                Log.e("BluetoothService", "listen() failed", var4);
            }

            this.mmServerSocket = tmp;
        }

        public void run() {
            Log.d("BluetoothService", "BEGIN mAcceptThread" + this);
            this.setName("AcceptThread");
            BluetoothSocket socket = null;

            while(BluetoothService.this.mState != 3) {
                Log.d("AcceptThread线程运行", "正在运行......");

                try {
                    socket = this.mmServerSocket.accept();
                } catch (IOException var6) {
                    Log.e("BluetoothService", "accept() failed", var6);
                    break;
                }

                if(socket != null) {
                    BluetoothService e = BluetoothService.this;
                    synchronized(BluetoothService.this) {
                        switch(BluetoothService.this.mState) {
                            case 0:
                            case 3:
                                try {
                                    socket.close();
                                } catch (IOException var4) {
                                    Log.e("BluetoothService", "Could not close unwanted socket", var4);
                                }
                                break;
                            case 1:
                            case 2:
                                BluetoothService.this.connected(socket, socket.getRemoteDevice());
                        }
                    }
                }
            }

            Log.i("BluetoothService", "END mAcceptThread");
        }

        public void cancel() {
            Log.d("BluetoothService", "cancel " + this);

            try {
                this.mmServerSocket.close();
            } catch (IOException var2) {
                Log.e("BluetoothService", "close() of server failed", var2);
            }

        }
    }

    private class ConnectThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final BluetoothDevice mmDevice;

        public ConnectThread(BluetoothDevice device) {
            this.mmDevice = device;
            BluetoothSocket tmp = null;

            try {
                tmp = device.createRfcommSocketToServiceRecord(BluetoothService.MY_UUID);
            } catch (IOException var5) {
                Log.e("BluetoothService", "create() failed", var5);
            }

            this.mmSocket = tmp;
        }

        public void run() {
            Log.i("BluetoothService", "BEGIN mConnectThread");
            this.setName("ConnectThread");
            BluetoothService.this.mAdapter.cancelDiscovery();

            try {
                this.mmSocket.connect();
            } catch (IOException var5) {
                BluetoothService.this.connectionFailed();

                try {
                    this.mmSocket.close();
                } catch (IOException var3) {
                    Log.e("BluetoothService", "unable to close() socket during connection failure", var3);
                }

                BluetoothService.this.start();
                return;
            }

            BluetoothService e = BluetoothService.this;
            synchronized(BluetoothService.this) {
                BluetoothService.this.mConnectThread = null;
            }

            BluetoothService.this.connected(this.mmSocket, this.mmDevice);
        }

        public void cancel() {
            try {
                this.mmSocket.close();
            } catch (IOException var2) {
                Log.e("BluetoothService", "close() of connect socket failed", var2);
            }

        }
    }

    private class ConnectedThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final InputStream mmInStream;
        private final OutputStream mmOutStream;

        public ConnectedThread(BluetoothSocket socket) {
            Log.d("BluetoothService", "create ConnectedThread");
            this.mmSocket = socket;
            InputStream tmpIn = null;
            OutputStream tmpOut = null;

            try {
                tmpIn = socket.getInputStream();
                tmpOut = socket.getOutputStream();
            } catch (IOException var6) {
                Log.e("BluetoothService", "temp sockets not created", var6);
            }

            this.mmInStream = tmpIn;
            this.mmOutStream = tmpOut;
        }

        public void run() {
            Log.d("ConnectedThread线程运行", "正在运行......");
            Log.i("BluetoothService", "BEGIN mConnectedThread");

            try {
                while(true) {
                    byte[] e = new byte[256];
                    int bytes = this.mmInStream.read(e);
                    if(bytes <= 0) {
                        Log.e("BluetoothService", "disconnected");
                        BluetoothService.this.connectionLost();
                        if(BluetoothService.this.mState != 0) {
                            Log.e("BluetoothService", "disconnected");
                            BluetoothService.this.start();
                        }
                        break;
                    }

                    BluetoothService.this.mHandler.obtainMessage(2, bytes, -1, e).sendToTarget();
                }
            } catch (IOException var3) {
                Log.e("BluetoothService", "disconnected", var3);
                BluetoothService.this.connectionLost();
                if(BluetoothService.this.mState != 0) {
                    BluetoothService.this.start();
                }
            }

        }

        public void write(byte[] buffer) {
            try {
                this.mmOutStream.write(buffer);
                BluetoothService.this.mHandler.obtainMessage(3, -1, -1, buffer).sendToTarget();
            } catch (IOException var3) {
                Log.e("BluetoothService", "Exception during write", var3);
            }

        }

        public void cancel() {
            try {
                this.mmSocket.close();
            } catch (IOException var2) {
                Log.e("BluetoothService", "close() of connect socket failed", var2);
            }

        }
    }
}