kotlin

前言：有时候在执行一系列流程时，需要去确保定位服务是打开的。这个时候会弹出dialog让我们去设置，如果设置不成功，回来之后点击下一步，还是让你去设置，直到成功为止，才能往下走。

首先将我们的定位服务开关关闭，点击下一步会出现如下提示：

点击去设置将其服务位置打开：

再返回App后，点击下一步则会显示定位服务已打开：

private lateinit var locationManager: LocationManager
locationManager = context.getSystemService(Context.LOCATION_SERVICE) as LocationManager
// 位置服务是否打开
val providerEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)

// REQUEST_LOCATION_SETTING 自己定义请求码 比如：REQUEST_LOCATION_SETTING = 110
startActivityForResult(Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS),REQUEST_LOCATION_SETTING)

    private fun showSelfTipsDialog(
        context: Context,
        title: String,
        content: String,
        onPositiveButton: (() -> Unit)? = null,
        onNegativeButton: (() -> Unit)? = null
    ): AlertDialog {
        val dialog = AlertDialog.Builder(context)
            .setTitle(title)
            .setPositiveButton(R.string.positive_click) { _, _ ->
                //未开启，跳转到系统定位页面
                startActivityForResult(
                    Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS),
                    REQUEST_LOCATION_SETTING
                )
                onPositiveButton?.invoke()
            }
            .setNegativeButton(R.string.negative_click) { _, _ ->
                // 点击取消的话，点击不了下一步
                onNegativeButton?.invoke()
            }
            .setCancelable(false)
            .create()
        dialog.setMessage(content)
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE)
        return dialog
    }

    
    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        Log.d(TAG, "onActivityResult...requestCode= $requestCode")
        when (requestCode) {
            REQUEST_LOCATION_SETTING -> {
                val providerEnabled =
                    locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)
                if (!providerEnabled) {
                    Log.d(TAG, "providerEnabled...providerEnabled= $providerEnabled")
                    showSelfTipsDialog(
                        context,
                        getString(R.string.settings_location),
                        getString(R.string.settings_location_content),
                        onPositiveButton = {
                            Log.d(TAG, "go to location setting page. ")
                        },
                        onNegativeButton = {
                            Log.d(TAG, "Hi bro,please make sure the permission passed. ")
                        }
                    ).show()
                }
            }
        }
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        context = this
        setContentView(R.layout.wifi_ap_activity_main)
        locationManager = context.getSystemService(Context.LOCATION_SERVICE) as LocationManager
        findViewById(R.id.btn).setOnClickListener {
            val providerEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)
            if (!providerEnabled) {
                showSelfTipsDialog(
                    context,
                    getString(R.string.settings_location),
                    getString(R.string.settings_location_content),
                    onPositiveButton = {
                        // 知识点：这里是使用了kotlin的高阶函数
                        // 将这里的所写的函数作为参数传递给调用处
                        Log.d(TAG, "go to location setting page. ")
                    },
                    onNegativeButton = {
                        Log.d(TAG, "Hi bro,please make sure the permission passed. ")
                    }
                ).show()
            } else {
                Toast.makeText(context, "定位服务已开启,可以进行下一步！", Toast.LENGTH_SHORT).show()
            }
        }
    }

到此就可以实现进行下一步的跳转提示了。
（如果错误，欢迎批评指正，请大佬轻喷）