请求蓝牙权限的更好方法是什么？

Question

我一直在寻找尝试并了解如何使用 ActivityCompat 来请求蓝牙和位置权限，但我不了解它们的实际工作原理。我已经检查了 Android 文档，但在弄清楚如何在我的项目中实现它方面运气不佳。任何人都可以帮助我了解请求权限的更好方法或为我指出一个很好的资源来理解它们吗？

这是我的代码：

@RequiresApi(Build.VERSION_CODES.S)
    override fun onStart() {
        super.onStart()
        if (!adapter.isEnabled) {
            // Check if bluetooth is enabled on the device.
            val enableBtIntent = Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)
            requestBluetooth.launch(enableBtIntent)
        }

        if (ActivityCompat.checkSelfPermission(
                this,
                Manifest.permission.BLUETOOTH_CONNECT
            ) != PackageManager.PERMISSION_GRANTED
        ) {

            if (ActivityCompat.shouldShowRequestPermissionRationale(
                    this@MainActivity,
                    android.Manifest.permission.BLUETOOTH_CONNECT
            )) {
                ActivityCompat.requestPermissions(
                    this@MainActivity,
                    arrayOf(Manifest.permission.BLUETOOTH_CONNECT), 1
                )
            }
        }

        if (ActivityCompat.checkSelfPermission(
                this,
                Manifest.permission.BLUETOOTH_SCAN
            ) != PackageManager.PERMISSION_GRANTED
        ) {

            if (ActivityCompat.shouldShowRequestPermissionRationale(
                    this@MainActivity,
                    android.Manifest.permission.BLUETOOTH_SCAN
                )) {
                ActivityCompat.requestPermissions(
                    this@MainActivity,
                    arrayOf(Manifest.permission.BLUETOOTH_SCAN), 1
                )
            }
        }

        // Checks if location permissions are granted and asks for them if they are not.
        if (ContextCompat.checkSelfPermission(
                this@MainActivity,
                android.Manifest.permission.ACCESS_FINE_LOCATION
            ) !==
            PackageManager.PERMISSION_GRANTED
        ) {
            if (ActivityCompat.shouldShowRequestPermissionRationale(
                    this@MainActivity,
                    android.Manifest.permission.ACCESS_FINE_LOCATION
                )
            ) {
                ActivityCompat.requestPermissions(
                    this@MainActivity,
                    arrayOf(android.Manifest.permission.ACCESS_FINE_LOCATION), 1
                )
            } else {
                ActivityCompat.requestPermissions(
                    this@MainActivity,
                    arrayOf(android.Manifest.permission.ACCESS_FINE_LOCATION), 1
                )
            }
        } else {
            if (recyclerView.isNotEmpty()){
                // scan without the loading progress bar.
                Log.d("progressBar", "onStart: hey!")
                progressBar.visibility = GONE
                scanLeDevice()
            }else {
                // scan with the loading progress bar.
                progressBar.visibility = VISIBLE
                scanLeDevice()
            }
        }
    }

以及位置权限的回调函数：

// Processes location permission results.
    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>,
                                            grantResults: IntArray) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        when (requestCode) {
            1 -> {
                if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    if ((ContextCompat.checkSelfPermission(this@MainActivity, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
                    ) {
                        Toast.makeText(this, "Permission Granted", Toast.LENGTH_SHORT).show()

                        if (recyclerView.isNotEmpty()){
                            // scan without the loading progress bar.
                            Log.d("progressBar", "onStart: hey!")
                            progressBar.visibility = GONE
                            scanLeDevice()
                        }else {
                            // scan with the loading progress bar.
                            progressBar.visibility = VISIBLE
                            scanLeDevice()
                        }
                    }
                } else {
                    Toast.makeText(this, "Location permission have been denied. Please enable location permissions to scan for ble devices.", Toast.LENGTH_LONG).show()
                    progressBar.visibility = GONE
                }
                return
            }
        }
    }