如何为 gps 使用特定对话框？

问题描述

当我尝试在不进入手机设置的情况下打开 GPS 时，出现此对话框：

我怎样才能显示带有这种描述的对话框？

这是我的代码示例：

viewmodel.onEnableGpsEvent.observe(this,Observer { event ->
    event.getContentIfNotHandled()?.let {
        activity?.let {
            val locationRequest = LocationRequest.create()
            locationRequest.priority = LocationRequest.PRIORITY_HIGH_ACCURACY
            val builder = LocationSettingsRequest.Builder().addLocationRequest(locationRequest)
            val task = LocationServices.getSettingsClient(it).checkLocationSettings(builder.build())

            task.addOnSuccessListener { response ->
                val states = response.locationSettingsstates
                if (states.isLocationPresent) {
                    //Todo: Do something if need it
                }
            }
            task.addOnFailureListener { e ->
                if (e is ResolvableApiException) {
                    try {
                        // Handle result in onActivityResult()
                        e.startResolutionForResult(
                            it,LOCATION_SETTING_REQUEST
                        )
                    } catch (sendEx: IntentSender.SendIntentException) {
                    }
                }
            }
        }

我还有下一个依赖：

implementation 'com.google.android.gms:play-services-location:18.0.0'

解决方法

这是我在 Fragment 中使用的方法：

1. 创建用于请求 GPS 功能的扩展功能：

    fun Fragment.requestGPSOn(request: ActivityResultLauncher<IntentSenderRequest>) {   //new api
        val locationRequest = LocationRequest.create().apply {
            priority = LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY     //GPS accuracy
        }
   
        val settingRequest = LocationSettingsRequest.Builder().run {
            addLocationRequest(locationRequest)
            build()
        }
   
        val settingsClient = LocationServices.getSettingsClient(requireContext())
        val task = settingsClient.checkLocationSettings(settingRequest)         //【fire and receive result】
   
        task.addOnFailureListener {                             //if GPS is not on currently
            val intentSender = (it as ResolvableApiException).resolution.intentSender
            val intentSenderRequest = IntentSenderRequest.Builder(intentSender).build()
   
            request.launch(intentSenderRequest)
        }
    }
   

2. 在 Fragment 中设置：

    class FirstFragment : Fragment() {
        private lateinit var binding: FragmentFirstBinding
        private lateinit var gpsOnRequest: ActivityResultLauncher<IntentSenderRequest>
   
        override fun onCreateView(inflater: LayoutInflater,container: ViewGroup?,savedInstanceState: Bundle?): View {
            binding = DataBindingUtil.inflate(inflater,R.layout.fragment_first,container,false)
            gpsOnRequest = getGPSOnRequest()
   
            binding.gpsOnButton.setOnClickListener {
                requestGPSOn(gpsOnRequest)      //extension function,【will apply specified accuracy even already on!!】
            }
   
            return binding.root
        }
   
        private fun getGPSOnRequest() = registerForActivityResult(ActivityResultContracts.StartIntentSenderForResult()) { result ->
            if (result.resultCode != RESULT_OK) {
                //do your stuff
            }
        }
    }
   

演示：https://youtu.be/nWsSADUmGzM

---

用于检查 GPS 状态：

fun Fragment.isGPSOn(): Boolean {
    val locationManager = requireContext().getSystemService(Context.LOCATION_SERVICE) as LocationManager

    return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)
}

请注意，startActivityForResult() 和 startIntentSenderForResult() 已被弃用，新的​​ Result api 请查看此官方视频：https://youtu.be/oP-zXjkT0C0。

,

用下一个解决方案解决了这个问题：

override fun enableGps(activity: FragmentActivity) {
    if (googleApiClient == null) {
        googleApiClient = GoogleApiClient.Builder(context)
            .addApi(LocationServices.API)
            .addConnectionCallbacks(object : GoogleApiClient.ConnectionCallbacks {
                override fun onConnected(bundle: Bundle?) {}
                override fun onConnectionSuspended(i: Int) {
                    googleApiClient?.connect()
                }
            })
            .addOnConnectionFailedListener { connectionResult ->
                Timber.e("${connectionResult.errorCode}")
            }.build()
        googleApiClient?.connect()
    }
    val locationRequest = LocationRequest.create()
    locationRequest.priority = LocationRequest.PRIORITY_HIGH_ACCURACY
    locationRequest.interval = 10000
    locationRequest.fastestInterval = 5000
    val builder = LocationSettingsRequest.Builder().addLocationRequest(locationRequest)
    builder.setAlwaysShow(true)
    val result: PendingResult<LocationSettingsResult> = LocationServices.SettingsApi.checkLocationSettings(googleApiClient,builder.build())
    result.setResultCallback { result ->
        val status: Status = result.status
        when (status.statusCode) {
            LocationSettingsStatusCodes.RESOLUTION_REQUIRED -> try {
                // Show the dialog by calling startResolutionForResult(),status.startResolutionForResult(
                    activity,REQUEST_LOCATION
                )
            } catch (e: IntentSender.SendIntentException) {
                Timber.e(e)
            }
            LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE -> {
                activity.startActivity(Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS))
            }
        }
    }
}