In that case, you can show an error message to the user or disable the Bluetooth features in your app. Intent In the MainActivity class, declare the following member variables: private BluetoothAdapter mBluetoothAdapter private static final int REQUEST_ENABLE_BT = 1 In the onCreate() method, initialize the BluetoothAdapter: mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter() If the device doesn’t have Bluetooth, then the mBluetoothAdapter variable will be null. BluetoothAdapter import android.bluetooth. Add the following permission to the manifest file: Next, open the MainActivity.java file and add the following import statements: import android.bluetooth. In the Project window, expand the app module and then open the manifest file. In Android Studio, open the project that you want to add Bluetooth features to. Before you begin, make sure you have the following: -Android Studio installed -A Bluetooth device that you can use for testing -The latest version of the Android SDK Once you have all of that, you’re ready to get started. The process is fairly simple and this tutorial will guide you through it step by step. Get the name and address of each paired device.If you’re developing an Android app that uses Bluetooth features, you need to first connect to a Bluetooth device using Android Studio. Set pairedDevices = bluetoothAdapter.getBondedDevices() Val deviceHardwareAddress = device.address // MAC address Val pairedDevices: Set? = bluetoothAdapter?.bondedDevices Get the name and MAC address of each device, as the following code snippet For example, you can query all paired devices and Query paired devicesīefore performing device discovery, it's worth querying the set of pairedĭevices to see if the desired device is already known. For more information, see the enableĭiscoverability section on this page. The device discoverable for a limited time through the system settings, or anĪpp can request that the user enable discoverability without leaving theĪpp. Note: Android-powered devices are not discoverable by default. How to discover new devices using device discovery. The following sections describe how to find devices that have been paired and Pairing is automatically performed when you initiate an encrypted The current BluetoothĪPIs require devices to be paired before an RFCOMM connection can beĮstablished. To be connected means that the devices currently share an RFCOMM channel andĪre able to transmit data with each other.Have a shared link-key that can be used for authentication, and are capable ofĮstablishing an encrypted connection with each other. To be paired means that two devices are aware of each other's existence,.Note that there is a difference between being paired and being connected: Without performing discovery, assuming the device is still within range. Using the known MACĪddress for a remote device, a connection can be initiated with it at any time When a device is paired, theīasic information about that device-such as the device's name, class, and MACĪddress-is saved and can be read using the Bluetooth APIs. Request is automatically presented to the user. Once a connection is made with a remote device for the first time, a pairing Performs device discovery on your app's behalf, so your app doesn't need to On a device that runs Android 8.0 (API level 26) or higher, consider using the The device discovery process requires location access. To initiate a connection to the discovered device.īecause discoverable devices might reveal information about the user's location, Information, the device that is performing the discovery process can then choose Such as the device's name, its class, and its unique MAC address. If a device isĭiscoverable, it responds to the discovery request by sharing some information, Process is sometimes referred to as discovering, inquiring, or scanning.Ī nearby Bluetooth device responds to a discovery request only if it isĬurrently accepting information requests by being discoverable. Make sure you have the appropriate Bluetoothĭevice discovery is a scanning procedure that searches the local area forīluetooth-enabled devices and requests some information about each one. You can find remote Bluetooth devices either through device discovery or by
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |