Как подключиться к нескольким устройствам одновременно ⇐ Android

[Anonymous]

Мне нужно создать приложение для Android, которое использует BLE для одновременного подключения к нескольким устройствам.
Поэтому я создал этот код в классе основной деятельности:

Код: Выделить всё

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
checkPermissions(true);

EdgeToEdge.enable(this);
setContentView(R.layout.activity_background_ble);
ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
return insets;
});
Intent sensorService = new Intent(getApplicationContext(),SensorService.class);
sensorService.putExtra("firstDevice", "10:7C:61:27:5C:56");
sensorService.putExtra("secondDevice", "10:7C:61:27:5C:64");
startService(sensorService);
}

Как вы можете видеть, я создаю экземпляр службы, передающей две строки, это Mac-адрес подключаемых устройств BLE.
Это класс SensorService:

Код: Выделить всё

public class SensorService extends IntentService {
public static final String tag = "Ssensors";
private static final String ACTION_FOO = "it.eresult.silvermountain.service.action.FOO";
private static final String ACTION_BAZ = "it.eresult.silvermountain.service.action.BAZ";

// TODO: Rename parameters
private static final String EXTRA_PARAM1 = "it.eresult.silvermountain.service.extra.PARAM1";
private static final String EXTRA_PARAM2 = "it.eresult.silvermountain.service.extra.PARAM2";

public long dosimeterScanningTime;
private Context mContext;
private String macAddress;
private int mStatus;
//private BluetoothDevice mDevice;

List listaSensori = new ArrayList();

public SensorService() {
super("SensorService");
}

// TODO: Customize helper method
public static void startActionFoo(Context context, String param1, String param2) {
Intent intent = new Intent(context, SensorService.class);
intent.setAction(ACTION_FOO);
intent.putExtra(EXTRA_PARAM1, param1);
intent.putExtra(EXTRA_PARAM2, param2);
context.startService(intent);
}

// TODO: Customize helper method
public static void startActionBaz(Context context, String param1, String param2) {
Intent intent = new Intent(context, SensorService.class);
intent.setAction(ACTION_BAZ);
intent.putExtra(EXTRA_PARAM1, param1);
intent.putExtra(EXTRA_PARAM2, param2);
context.startService(intent);
}

@Override
protected void onHandleIntent(Intent intent) {

Log.d(tag, "ON HANDLE INTENT");
Bundle extras = intent.getExtras();
if (extras == null) {
Log.d(tag, "No macAddress configuration");
}
else {
String firstMacAddress = (String) extras.get("firstDevice");
String secondMacAddress = (String) extras.get("secondDevice");

//questa parte di codice va rivista
if (intent != null) {
String action = intent.getStringExtra(PreferenceHandler.ACTION);

Log.d(tag, action != null ? action : "no action");
if (action != null && action.equals(PreferenceHandler.ACTION_CHANGE_SCANNING_ROTATION_TIME)) {
Log.d(tag, "modifico il servizio");
//todo questa parte va rivista
int rTime = 10;
int sTime = 10;
dosimeterScanningTime = sTime;
Log.d(tag, "val new " + dosimeterScanningTime);
//provo a vedere se la modifica ha risolto qualcosa
return;
} else if (action != null &&  action.equals(PreferenceHandler.ACTION_STOP)) {
Log.d(tag, "fermo il servizio");
dosimeterScanningTime = 0;

//provo a vedere se la modifica ha risolto qualcosa
return;
}
}
mContext = this;
dosimeterScanningTime = 100;
SensorModel s = new SensorModel();
s.setMacAddress(firstMacAddress);
listaSensori.add(s);
s = new SensorModel();
s.setMacAddress(secondMacAddress);
listaSensori.add(s);
for(int i=0;i< listaSensori.size();i++) {
connectDevice(i, listaSensori.get(i).getMacAddress());
}
}
}

private void connectDevice(int tagDevice, String mac) {
listaSensori.get(tagDevice).setConnectionState(0);//connecting
macAddress = mac;
// Toast.makeText(getApplicationContext(), "Dosimeter connected", Toast.LENGTH_LONG).show();
Log.d(tag, "Try to connect device: "+mac);
mStatus = BluetoothProfile.STATE_DISCONNECTED;
if( listaSensori.get(tagDevice).getmConnGatt()==null){
Log.w(tag, "new connect :: "+ listaSensori.get(tagDevice).getMacAddress());
BluetoothDevice device = BluetoothAdapter.getDefaultAdapter().getRemoteDevice(mac);
if (device == null) {
Log.w(tag, "Device not found.  Unable to connect.");
return;
}
try {
if (ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
Log.d(tag, "Missing bluetooth permission");
// 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;
}
BluetoothGatt mConnGatt = device.connectGatt(mContext, true, mGattCallback);
mConnGatt.connect();
mConnGatt.discoverServices();
listaSensori.get(tagDevice).setmConnGatt(mConnGatt);
}
catch (Exception e)
{
//e.printStackTrace();
Log.d(tag,"ConnectGatt exception caught " + e.getMessage());
}
}

}

private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {

@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
Log.d(tag, gatt.getDevice().getAddress()+ " onConnectionStateChange, status " +status+" newState: " + newState);

}

@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
Log.d(tag, gatt.getDevice().getAddress()+" onServicesDiscovered");

}

@Override
public void onCharacteristicRead(BluetoothGatt gatt,BluetoothGattCharacteristic characteristic,int status) {
Log.d(tag, gatt.getDevice().getAddress()+" onCharacteristicRead");

}
@Override
public void onCharacteristicWrite(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic, int status) {
super.onCharacteristicWrite(gatt, characteristic, status);
Log.d(tag,gatt.getDevice().getAddress()+ " >>onCharacteristicWrite");

}
@Override
public void onCharacteristicChanged(BluetoothGatt gatt,BluetoothGattCharacteristic characteristic) {
Log.d(tag,">>onCharacteristicChanged");
}
};
}

Теперь, если я попытаюсь запустить свой код, служба запустится, приложение подключится к двум устройствам BLE и будет вызван метод «onConnectionStateChange». Это журнал

Код: Выделить всё

10:7C:61:27:5C:56 onConnectionStateChange, status 133 newState: 0

Поэтому я не могу подключиться к устройству BLE и прочитать его характеристики.

Подробнее здесь: https://stackoverflow.com/questions/790 ... same-times