Question

最近我一直在尝试实现逻辑，以便每 15 分钟使用工作管理器从 FusedLocationProviderClient 获取位置更新（因为这是最小的后台执行延迟）。但是 FusedLocationProviderClient 的 requestLocationUpdates() 函数每 15 分钟失败一次，我无法从中获得成功结果任务，我总是得到失败的结果。当我从 fusedlocationproviderclient 打印异常时，它只打印“null”？有什么帮助吗？

片段：

private fun addWorker(){
        val workRequest = PeriodicWorkRequestBuilder<MyWorker>(15, TimeUnit.MINUTES)
            .build()
        val workManager = WorkManager.getInstance(requireContext())
        workManager.enqueueUniquePeriodicWork(
            "MyMainWorker",
            ExistingPeriodicWorkPolicy.KEEP,
            workRequest
        )
}

工人

class MyWorker(context: Context, wp: WorkerParameters) :
    Worker(context, wp) {

    private val LOCATION_UPDATE_INTERVAL = TimeUnit.MINUTES.toMillis(4)
    private val LOCATION_FASTEST_UPDATE_INTERVAL = TimeUnit.MINUTES.toMillis(2)

    private var ctx: Context = context

    override fun doWork(): Result {
        return if (getLocationUpdate()) {
            Log.d("MyWorker", "SUCCESS")
            Result.success()
        } else {
            Log.d("MyWorker", "FAILURE")
            Result.failure()
        }
    }

    @SuppressLint("MissingPermission")
    private fun getLocationUpdate(): Boolean {

       val fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(ctx)

        val locationCallback = object : LocationCallback() {
            override fun onLocationResult(result: LocationResult?) {
                super.onLocationResult(result)
                result?.locations?.let { locations ->
                    for (location in locations) {
                        Log.d("MyWorker", "NEW Location: $location")
                    }
                }
            }
        }

        val locationRequest = LocationRequest().apply {
            interval = LOCATION_UPDATE_INTERVAL
            fastestInterval = LOCATION_FASTEST_UPDATE_INTERVAL
            priority = LocationRequest.PRIORITY_HIGH_ACCURACY
        }
        val result = fusedLocationProviderClient.requestLocationUpdates(
            locationRequest,
            locationCallback,
            Looper.getMainLooper()
        )
        Log.d("MyWorker", result.exception?.message.toString())
        Log.d("MyWorker", result.exception?.cause.toString())
        Log.d("MyWorker", result.exception.toString())
        return result.isSuccessful
    }

错误

<块引用>

I/WM-WorkerWrapper: Worker 结果 FAILURE for Work [ id=3fe5b78d-e0ed-4348-90b6-25c2c1f96bfd，标签={ com.example.testapp.MyWorker } ]

Answer 1

<块引用>

注意：Google Play 商店更新了有关设备的政策位置，限制对需要它的应用程序的后台位置访问其核心功能并满足相关政策要求。采用这些最佳做法并不能保证 Google Play 会批准您的应用在后台使用位置信息。

详细了解与设备位置相关的政策变化。 https://support.google.com/googleplay/android-developer/answer/9799150

工作管理器的位置更新不起作用

1 个答案: