1.聲明藍牙權限

<uses-permission android:name="android.permission.BLUETOOTH" /> <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

2.獲取BluetoothAdapter

private lateinit var bluetoothAdapter: BluetoothAdapter override fun onStart() {super.onStart()bluetoothAdapter = BluetoothAdapter.getDefaultAdapter() }

?3.判斷藍牙是否開啟，如果開啟則開始掃描，如果未開啟則通過動態請求打開藍牙

if (!bluetoothAdapter.isEnabled) {val bIntent = Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)startActivityForResult(bIntent, requestEnable) } else {bluetoothAdapter.startDiscovery() } //獲取權限后，開始掃描 override fun onRequestPermissionsResult(requestCode: Int,permissions: Array<out String>,grantResults: IntArray ) {super.onRequestPermissionsResult(requestCode, permissions, grantResults)Logger.e("ble--->$requestCode")if (requestCode == 1) {bluetoothAdapter.startDiscovery()} }

?4.通過廣播接收掃描的藍牙信息

private val mBluetoothReceiver = object : BroadcastReceiver() {override fun onReceive(context: Context?, intent: Intent?) {val action = intent!!.actionif (StringUtil.isSameStr(BluetoothDevice.ACTION_FOUND, action)) {val device: BluetoothDevice? =intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE)if (device != null) {scanDeviceList.add(device)scanDeviceAdapter.notifyDataSetChanged()}}}}

5.注冊廣播監聽藍牙狀態，記得在onDestroy注銷

val filter = IntentFilter() //發現設備 filter.addAction(BluetoothDevice.ACTION_FOUND); //設備連接狀態改變 filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED); //藍牙設備狀態改變 filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED); registerReceiver(mBluetoothReceiver, filter) //取消廣播，關閉藍牙掃描 override fun onDestroy() {super.onDestroy()bluetoothAdapter.cancelDiscovery()unregisterReceiver(mBluetoothReceiver) }

下篇介紹藍牙連接

總結

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