一、基本说明

参考资料【自用Android 版本12】

二、实践

一、声明权限

<!-- Request legacy Bluetooth permissions on older devices. -->
<uses-permission android:name="android.permission.BLUETOOTH"
    android:maxSdkVersion="30" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"
    android:maxSdkVersion="30" />

<!-- Needed only if your app looks for Bluetooth devices.
     You must add an attribute to this permission, or declare the
     ACCESS_FINE_LOCATION permission, depending on the results when you
     check location usage in your app. -->
<uses-permission android:name="android.permission.BLUETOOTH_SCAN"
    android:usesPermissionFlags="neverForLocation"
    tools:targetApi="s" />

<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

二、Activity

class MainActivity : BaseActivity<ActivityMainBinding>() {
    override val layoutId: Int
        get() = R.layout.activity_main
    override val TAG: String
        get() = "TAG_MainActivity"


    private val receiver = object : BroadcastReceiver() {

        @RequiresApi(Build.VERSION_CODES.R)
        @SuppressLint("MissingPermission")
        //不用  Manifest.permission.BLUETOOTH_CONNECT校验权限  API31才有的  完成权限申请后才发起
        override fun onReceive(context: Context, intent: Intent) {
            val action: String? = intent.action
            when(action) {
                BluetoothDevice.ACTION_FOUND -> {
                    // Discovery has found a device. Get the BluetoothDevice
                    // object and its info from the Intent.
                    val device: BluetoothDevice? =
                        intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE)
                    val deviceName = device?.name
                    val deviceHardwareAddress = device?.address // MAC address\
                    Log.d(TAG, "onReceive device: "+device.toString())
                    Log.d(TAG, "onReceive deviceName: "+deviceName)
                    Log.d(TAG, "onReceive deviceHardwareAddress: "+deviceHardwareAddress)
                    Log.d(TAG, "onReceive deviceHardwareAddress: "+device?.alias)
                    Log.d(TAG, "onReceive 类型: "+device?.type)
                    Log.d(TAG, "onReceive 类型 : "+device?.uuids) //这个不太可靠 可能扫不到
                }
            }
        }
    }


//    val DEVICE_TYPE_UNKNOWN = 0 未知类型
//    val DEVICE_TYPE_CLASSIC = 1 传统类型
//    val DEVICE_TYPE_LE = 2 ble类型
//    val DEVICE_TYPE_DUAL = 3 传统和ble双重类型


    override fun initView() {
        super.initView()
    }

    override fun initDate() {
        super.initDate()
        val filter = IntentFilter(BluetoothDevice.ACTION_FOUND)
        registerReceiver(receiver, filter)
        checkBlueTooth()
    }

    @SuppressLint("MissingPermission")
    private fun checkBlueTooth(){
        val bluetoothAdapter: BluetoothAdapter? = BluetoothAdapter.getDefaultAdapter()
        if (bluetoothAdapter == null) {
            Toast.makeText(this,getString(R.string.str_no_blue_tooth), Toast.LENGTH_SHORT).show()
            return
        }

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S){
            PermissionX.init(this@MainActivity)
                .permissions(Manifest.permission.BLUETOOTH_CONNECT, Manifest.permission.BLUETOOTH_SCAN,Manifest.permission.ACCESS_COARSE_LOCATION)
                .request { allGranted, grantedList, deniedList ->
                    if (allGranted) {
                        Toast.makeText(this, "所需蓝牙权限已通过", Toast.LENGTH_LONG).show()
                        if (!bluetoothAdapter.isEnabled) {
                            val enableBtIntent = Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)
                            startActivityForResult(enableBtIntent, Constant.REQUEST_ENABLE_BT)
                            bluetoothAdapter.startDiscovery()
                            Log.d(TAG, "startDiscovery()")
                        }
                    } else {
                        Toast.makeText(this, "These permissions are denied: $deniedList", Toast.LENGTH_LONG).show()
                    }
                }
        }
        bluetoothAdapter.startDiscovery()
        Log.d(TAG, "startDiscovery(x)")
    }

    override fun onDestroy() {
        super.onDestroy()
        unregisterReceiver(receiver)
    }


}

三、查看Log

拓展

1、好东西：a1anwang/okble: An easy-to-use BLE library for android. 简单易用的android BLE library (github.com)

【Android笔记】蓝牙扫描接入

一、基本说明

二、实践

一、声明权限

二、Activity

三、查看Log

拓展