Android位置请求PRIORITY_HIGH_ACCURACY无效答案

【问题标题】：Android location request PRIORITY_HIGH_ACCURACY has no effectAndroid位置请求PRIORITY_HIGH_ACCURACY无效
【发布时间】：2018-08-15 11:04:41
【问题描述】：

我的 Android 应用需要高精度位置跟踪。在应用启动时，它会以编程方式读取位置设置，如果未选择 高精度，则会显示一个屏幕。

我将 Google 的官方示例 (https://developers.google.com/android/reference/com/google/android/gms/location/SettingsClient) 改编为 Kotlin。

这在华为手机上按预期工作，但在三星 S7 和 S8 上失败：如果用户选择了电源平衡，则会出现一个对话框并将位置跟踪设置为高精度。但是，如果之前选择了 仅 GPS，则不会抛出 ApiException 并且设置保持不变。

val locationRequest = LocationRequest.create()
locationRequest.priority = LocationRequest.PRIORITY_HIGH_ACCURACY

val builder = LocationSettingsRequest.Builder().addLocationRequest(locationRequest)
val result = LocationServices.getSettingsClient(this).checkLocationSettings(builder.build())

result.addOnCompleteListener(OnCompleteListener {
    try {
        it.getResult(ApiException::class.java)
        // on Samsung + GPS only setting, execution passes here, no ApiException thrown
    } catch(e: ApiException) {
        if(e is ResolvableApiException) {
            // ...show resolution dialog...
        }
    }
}

任何提示将不胜感激，谢谢:)

【问题讨论】：

也有这个问题。

标签： android request location setting

【解决方案1】：

我对 s8 也有同样的问题，所以我检查了设备，如果是 s8，我向PRIORITY_BALANCED_POWER_ACCURACY 发出请求，它可以工作，但有一些延迟。

【讨论】：

【解决方案2】：

我遇到了同样的问题。我找到了解决方案。

    val locationRequest = LocationRequest.create()
    locationRequest.priority = LocationRequest.PRIORITY_HIGH_ACCURACY

    val builder = LocationSettingsRequest.Builder().addLocationRequest(locationRequest)
    val result = LocationServices.getSettingsClient(this).checkLocationSettings(builder.build())

    result.addOnCompleteListener(OnCompleteListener {
        try {
            it.getResult(ApiException::class.java)
            // on Samsung + GPS only setting, execution passes here, no ApiException thrown
            val locationManager = application.getSystemService(Context.LOCATION_SERVICE) as LocationManager
            if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
                AlertDialog.Builder(this@YourActivity)
                        .setMessage("message for user")
                        .setPositiveButton(R.string.ok) { _, _ ->
                            val intent = Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS)
                            this@YourActivity.startActivityForResult(intent, RC_GPS_LOCATION)
                        }
                        .setNegativeButton(R.string.no_thanks, null)
                        .create()
                        .show()
            } else {
                // your code for High accuracy mode
            }
        } catch (ApiException exception) {
            switch (exception.getStatusCode()) {
                case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
                    try {
                        ResolvableApiException resolvable = (ResolvableApiException) exception;
                        resolvable.startResolutionForResult(getActivity(), RC_RESOLVE_LOCATION);
                    } catch (IntentSender.SendIntentException ex) {
                        // Ignore the error.
                    }
                    break;
                case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                    showToast(R.string.sorry_your_device_is_not_supported);
                    break;
            }
        }
    }

请不要忘记处理活动结果。

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        when (requestCode) {
            RC_GPS_LOCATION -> {
                // do action after user closed GPS settings screen
            }
        }
    }

注意：在某些设备上，会启动一个对话框，让您可以一键启用 GPS。在其他情况下，用户将被重定向到设置屏幕（但这总比没有好）。

【讨论】：