获取当前用户的位置时应用程序崩溃 (Kotlin)

Question

我的代码可以编译，但应用程序现在不会启动。 我尝试了很多变体来简单地获取用户的当前位置并使用 MapsSDK 显示它，但没有任何效果。

片段活动：

class BuyFragment : Fragment(), OnMapReadyCallback {

    private var _binding: FragmentBuyBinding? = null

    private val binding get() = _binding!!
    private lateinit var map: GoogleMap
    private lateinit var fusedLocationClient: FusedLocationProviderClient
    private val locationPermissionCode = 1

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        val view = inflater.inflate(R.layout.fragment_buy, container, false)

        val mapFragment = childFragmentManager.findFragmentById(R.id.map) as SupportMapFragment
        mapFragment.getMapAsync(this)
        fusedLocationClient = LocationServices.getFusedLocationProviderClient(requireContext())

        return view
    }

    override fun onMapReady(googleMap: GoogleMap) {
        map = googleMap
        if (ContextCompat.checkSelfPermission(
                requireContext(),
                Manifest.permission.ACCESS_FINE_LOCATION
            ) != PackageManager.PERMISSION_GRANTED
        ) {
            ActivityCompat.requestPermissions(
                requireActivity(),
                arrayOf(Manifest.permission.ACCESS_FINE_LOCATION),
                locationPermissionCode
            )
        } else {
            map.isMyLocationEnabled = true
            getCurrentLocation()
        }
    }
    
    override fun onRequestPermissionsResult(
        requestCode: Int,
        permissions: Array<out String>,
        grantResults: IntArray
    ) {
        if (requestCode == locationPermissionCode) {
            if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                map.isMyLocationEnabled = true
                getCurrentLocation()
            }
        }
    }

    private fun getCurrentLocation() {
        fusedLocationClient.lastLocation
            .addOnSuccessListener { location: Location? ->
                if (location != null) {
                    val currentLocation = LatLng(location.latitude, location.longitude)
                    map.addMarker(MarkerOptions().position(currentLocation).title("Current Location"))
                    map.moveCamera(CameraUpdateFactory.newLatLngZoom(currentLocation, 15.0f))
                }
            }
    }
}

依赖项：

dependencies {

    implementation 'androidx.preference:preference:1.0.0-rc02'
    implementation 'androidx.core:core-ktx:1.7.0'
    implementation 'androidx.appcompat:appcompat:1.4.1'
    implementation 'com.google.android.material:material:1.6.0'
    implementation 'com.google.android.gms:play-services-maps:18.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.3.1'
    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.1'
    implementation 'androidx.navigation:navigation-fragment-ktx:2.4.2'
    implementation 'androidx.navigation:navigation-ui-ktx:2.4.2'
    implementation 'com.google.android.gms:play-services-location:11.0.2'
    implementation 'androidx.preference:preference-ktx:1.2.0'
    implementation 'com.google.android.gms:play-services-location:21.0.1'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}

布局：

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ui.buy.BuyFragment">

    <fragment
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment" />
</androidx.constraintlayout.widget.ConstraintLayout>

我一直将我的代码恢复为仅显示地图并且可以正常工作，但我想让该应用程序在用户的当前位置启动。

Answer 1

你能分享一下崩溃日志吗？ 这将有助于缩小根本问题的范围。 此外，如果您还没有，请不要忘记请求位置权限，以便您可以使用位置服务。