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Details

Type: Bug
Resolution: Done
Priority: P1: Critical
Fix Version/s: 5.12.8, 5.14.2, 5.15.0 Beta1
Affects Version/s: 5.14.0
Component/s: Connectivity: Bluetooth
Labels:
None
Environment:
Android 10

Platform/s:

Android
Commits:
0c8f3eb35eead6e4db7732020d7fb2863ba3787f (qt/qtconnectivity/5.14) e851596c284bfa3ef5be1bb982cf8a57360baed9 (qt/qtconnectivity/5.12)

Description

When you try to discover devices using the QBluetoothDeviceDiscoveryAgent you immediately get QBluetoothDeviceDiscoveryAgent::InputOutputError, after spending some hours trying to figure out what is going on, I discovered that when I switch the target sdk to API 28 it works flawless.

To reproduce the error the next code snipped is enough:

    QBluetoothDeviceDiscoveryAgent *discoveryAgent = new QBluetoothDeviceDiscoveryAgent;

    connect(discoveryAgent , SIGNAL(deviceDiscovered(QBluetoothDeviceInfo)),
            this, SLOT(deviceDiscovered(QBluetoothDeviceInfo)));
    connect(discoveryAgent , SIGNAL(error(QBluetoothDeviceDiscoveryAgent::Error)),
            this, SLOT(discoveryError(QBluetoothDeviceDiscoveryAgent::Error)));

    discoveryAgent->start();