void QBluetoothDeviceDiscoveryAgentPrivate::start()
{
if (pendingCancel) {
pendingStart = true;
return;
}
Q_Q(QBluetoothDeviceDiscoveryAgent);
if (!adapter.isValid()) {
qCWarning(QT_BT_ANDROID) << "Device does not support Bluetooth";
lastError = QBluetoothDeviceDiscoveryAgent::InputOutputError;
errorString = QBluetoothDeviceDiscoveryAgent::tr("Device does not support Bluetooth");
emit q->error(lastError);
return;
}
if (!m_adapterAddress.isNull()
&& adapter.callObjectMethod<jstring>("getAddress").toString()
!= m_adapterAddress.toString()) {
qCWarning(QT_BT_ANDROID) << "Incorrect local adapter passed.";
lastError = QBluetoothDeviceDiscoveryAgent::InvalidBluetoothAdapterError;
errorString = QBluetoothDeviceDiscoveryAgent::tr("Passed address is not a local device.");
emit q->error(lastError);
return;
}
const int state = adapter.callMethod<jint>("getState");
if (state != 12) { // BluetoothAdapter.STATE_ON
lastError = QBluetoothDeviceDiscoveryAgent::PoweredOffError;
errorString = QBluetoothDeviceDiscoveryAgent::tr("Device is powered off");
emit q->error(lastError);
return;
}
// install Java BroadcastReceiver
if (!receiver) {
// SDP based device discovery
receiver = new DeviceDiscoveryBroadcastReceiver();
qRegisterMetaType<QBluetoothDeviceInfo>();
QObject::connect(receiver, SIGNAL(deviceDiscovered(QBluetoothDeviceInfo,bool)),
this, SLOT(processDiscoveredDevices(QBluetoothDeviceInfo,bool)));
QObject::connect(receiver, SIGNAL(finished()), this, SLOT(processSdpDiscoveryFinished()));
}
void QBluetoothDeviceDiscoveryAgentPrivate::start(QBluetoothDeviceDiscoveryAgent::DiscoveryMethods methods)
{
//TODO Implement discovery method handling (see input parameter)
requestedMethods = methods;
if (pendingCancel) {
pendingStart = true;
return;
}
Q_Q(QBluetoothDeviceDiscoveryAgent);
if (!adapter.isValid()) {
qCWarning(QT_BT_ANDROID) << "Device does not support Bluetooth";
lastError = QBluetoothDeviceDiscoveryAgent::InputOutputError;
errorString = QBluetoothDeviceDiscoveryAgent::tr("Device does not support Bluetooth");
emit q->error(lastError);
return;
}
if (!m_adapterAddress.isNull()
&& adapter.callObjectMethod<jstring>("getAddress").toString()
!= m_adapterAddress.toString()) {
qCWarning(QT_BT_ANDROID) << "Incorrect local adapter passed.";
lastError = QBluetoothDeviceDiscoveryAgent::InvalidBluetoothAdapterError;
errorString = QBluetoothDeviceDiscoveryAgent::tr("Passed address is not a local device.");
emit q->error(lastError);
return;
}
const int state = adapter.callMethod<jint>("getState");
if (state != 12) { // BluetoothAdapter.STATE_ON
lastError = QBluetoothDeviceDiscoveryAgent::PoweredOffError;
errorString = QBluetoothDeviceDiscoveryAgent::tr("Device is powered off");
emit q->error(lastError);
return;
}
// check Android v23+ permissions
// -> BTLE search requires android.permission.ACCESS_COARSE_LOCATION
if (requestedMethods & QBluetoothDeviceDiscoveryAgent::LowEnergyMethod
&& QtAndroid::androidSdkVersion() >= 23)
{
QString permission(QLatin1String("android.permission.ACCESS_COARSE_LOCATION"));
// do we have required permission already, if so nothing to do
if (QtAndroidPrivate::checkPermission(permission) == QtAndroidPrivate::PermissionsResult::Denied) {
qCWarning(QT_BT_ANDROID) << "Requesting ACCESS_COARSE_LOCATION permission";
QAndroidJniEnvironment env;
const QHash<QString, QtAndroidPrivate::PermissionsResult> results =
QtAndroidPrivate::requestPermissionsSync(env, QStringList() << permission);
if (!results.contains(permission)
|| results[permission] == QtAndroidPrivate::PermissionsResult::Denied)
{
qCWarning(QT_BT_ANDROID) << "Search not possible due to missing permission (ACCESS_COARSE_LOCATION)";
lastError = QBluetoothDeviceDiscoveryAgent::UnknownError;
errorString = QBluetoothDeviceDiscoveryAgent::tr("Missing Location permission. Search is not possible.");
emit q->error(lastError);
return;
}
}
qCWarning(QT_BT_ANDROID) << "ACCESS_COARSE_LOCATION permission available";
}
// install Java BroadcastReceiver
if (!receiver) {
// SDP based device discovery
receiver = new DeviceDiscoveryBroadcastReceiver();
qRegisterMetaType<QBluetoothDeviceInfo>();
QObject::connect(receiver, SIGNAL(deviceDiscovered(QBluetoothDeviceInfo,bool)),
this, SLOT(processDiscoveredDevices(QBluetoothDeviceInfo,bool)));
QObject::connect(receiver, SIGNAL(finished()), this, SLOT(processSdpDiscoveryFinished()));
}
