As of now, Bluetooth is not officially supported on the Ubuntu platform. For some hacker-level developers, there may be no time to wait. Here’s a way to give it a try. The final platform will support Bluetooth. Libraries will also be installed on the platform.
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In order to be able to run Bluetooth applications on mobile phones, we must do the following:
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The sentence above:
$ sudo mount -o rw,remount /
Copy the codeTo make our image read and write so that we can install our Qt Bluetooth library below
We pass the command:
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$ sudo apt-get install qml-module-qtbluetooth
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To install the corresponding Qt Bluetooth library.
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Because Bluetooth is not currently fully supported, there is no corresponding security policy for it. In our test application, we had to adapt the “unconfined” template:
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bluetooth.apparmor
{"policy_groups": ["networking", "webview", "connectivity"], "policy_version": 1.3, "template": "unconfined"}Copy the code\
Scanner.qml
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Import QtQuick 2.0 import QtBluetooth 5.2 Item {id: top property BluetoothService currentService BluetoothDiscoveryModel { id: btModel running: true discoveryMode: BluetoothDiscoveryModel.DeviceDiscovery onDiscoveryModeChanged: console.log("Discovery mode: " + discoveryMode) onServiceDiscovered: console.log("Found new service " + service.deviceAddress + " " + service.deviceName + " " + service.serviceName); onDeviceDiscovered: console.log("New device: " + device) onErrorChanged: { switch (btModel.error) { case BluetoothDiscoveryModel.PoweredOffError: console.log("Error: Bluetooth device not turned on"); break; case BluetoothDiscoveryModel.InputOutputError: console.log("Error: Bluetooth I/O Error"); break; case BluetoothDiscoveryModel.InvalidBluetoothAdapterError: console.log("Error: Invalid Bluetooth Adapter Error"); break; case BluetoothDiscoveryModel.NoError: break; default: console.log("Error: Unknown Error"); break; }} Rectangle {id: busy width: top.width * 0.7; anchors.horizontalCenter: parent.horizontalCenter anchors.top: top.top; Height: text. Height * 1.2; radius: 5 color: "#1c56f3" visible: btModel.running Text { id: text text: "Scanning" font.bold: true font.pointSize: 20 anchors.centerIn: parent } SequentialAnimation on color { id: busyThrobber ColorAnimation { easing.type: Easing.InOutSine; from: "#1c56f3"; to: "white"; duration: 1000; } ColorAnimation { easing.type: Easing.InOutSine; to: "#1c56f3"; from: "white"; duration: 1000 } loops: Animation.Infinite } } ListView { id: mainList width: top.width anchors.top: busy.bottom anchors.bottom: buttonGroup.top anchors.bottomMargin: 10 anchors.topMargin: 10 clip: true model: btModel delegate: Rectangle { id: btDelegate width: parent.width height: column.height + 10 property bool expended: false; clip: true Image { id: bticon source: "images/default.png"; width: bttext.height; height: bttext.height; anchors.top: parent.top anchors.left: parent.left anchors.margins: 5 } Column { id: column anchors.left: bticon.right anchors.leftMargin: 5 Text { id: bttext text: deviceName ? deviceName : name font.family: "FreeSerif" font.pointSize: 16 } Text { id: details function get_details(s) { if (btModel.discoveryMode == BluetoothDiscoveryModel.DeviceDiscovery) { //We are doing a device discovery var str = "Address: " + remoteAddress; return str; } else { var str = "Address: " + s.deviceAddress; if (s.serviceName) { str += "<br>Service: " + s.serviceName; }
if (s.serviceDescription) { str += "<br>Description: " + s.serviceDescription; }
if (s.serviceProtocol) { str += "<br>Protocol: " + s.serviceProtocol; } return str; } } visible: opacity ! == 0 opacity: btDelegate.expended ? 1:0.0 text: get_details(service) font. Family: "FreeSerif" font. PointSize: 14 Behavior on opacity { NumberAnimation { duration: 200} } } } Behavior on height { NumberAnimation { duration: 200} } MouseArea { anchors.fill: parent onClicked: btDelegate.expended = ! btDelegate.expended } } focus: true } Row { id: buttonGroup property var activeButton: devButton anchors.bottom: parent.bottom anchors.horizontalCenter: parent.horizontalCenter anchors.bottomMargin: 5 spacing: 10 Button { id: //mdButton has longest text height: mdButton. Height text: "Full Discovery" onClicked: btModel.discoveryMode = BluetoothDiscoveryModel.FullServiceDiscovery } Button { id: mdButton width: Top. width/3*0.9 text: "Minimal Discovery" onClicked: btModel.discoveryMode = BluetoothDiscoveryModel.MinimalServiceDiscovery } Button { id: devButton width: Top. Width /3*0.9 //mdButton has nodenode. height text: "Device Discovery" onClicked: btModel.discoveryMode = BluetoothDiscoveryModel.DeviceDiscovery } } }Copy the code\
Developers can refer directly to the Qt documentation for further information about the Bluetood DiscoveryModel.
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To run our app:
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The entire application source at: github.com/liu-xiao-gu…