谷歌地图未显示在底部导航活动片段(kotlin)中

Question

我只看到带有谷歌标志的灰色、空的、空白的窗口

1. 活动碎片_map

   <?xml version="1.0" encoding="utf-8"?>
   <androidx.constraintlayout.widget.ConstraintLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   android:layout_width="match_parent"
   android:layout_height="match_parent">
   <fragment
   android:id="@+id/map"
   android:name="com.google.android.gms.maps.SupportMapFragment"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   />
   </androidx.constraintlayout.widget.ConstraintLayout>
   

2. MapFragment类

   class MapFragment : Fragment(), OnMapReadyCallback{
   private lateinit var mMap: GoogleMap
   

在onCreateView 中

// Inflate the layout for this fragment
var rootView = inflater.inflate(R.layout.fragment_map, container, false)
var mapFragment = getChildFragmentManager().findFragmentById(R.id.map) as SupportMapFragment
mapFragment?.getMapAsync(this)
return rootView

和更多的代码

override fun onMapReady(googleMap: GoogleMap) {
mMap = googleMap
// Add a marker in Sydney and move the camera
val sydney = LatLng(-34.0, 151.0)
mMap.addMarker(MarkerOptions().position(sydney).title("Marker in Sydney"))
mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney))
}

3. SDK启用，添加API密钥，并在Google API 中配置SHA1

4. AndroidManifest

   <?xml version="1.0" encoding="utf-8"?>
   <manifest xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:dist="http://schemas.android.com/apk/distribution"
   package="com.domain.name">
   <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
   <dist:module dist:instant="true" />
   <application
   android:allowBackup="true"
   android:icon="@mipmap/ic_launcher"
   android:label="@string/app_name"
   android:roundIcon="@mipmap/ic_launcher_round"
   android:supportsRtl="true"
   android:theme="@style/AppTheme">
   <meta-data
   android:name="com.google.android.gms.version"
   android:value="@integer/google_play_services_version" />
   <meta-data
   android:name="com.google.android.geo.API_KEY"
   android:value="@string/google_maps_api_key"/>
   <activity
   android:name=".MainActivity"
   android:label="@string/app_name">
   <intent-filter>
   <action android:name="android.intent.action.MAIN" />
   <category android:name="android.intent.category.LAUNCHER" />
   </intent-filter>
   </activity>
   </application>
   </manifest>
   

5. 在Strings.xml 中

   <string name="google_maps_api_key">AIz....2Y</string>
   

在谷歌地图活动项目/应用程序地图创建的密钥是正常工作的

Answer 1

您必须在AndroidManifest.xml中添加API密钥以启用必要的API

<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="PASTE-YOUR-API-KEY-HERE" />

检查此项以获取API密钥

Answer 2

在AndroidManifest.xml 中删除

<dist:module dist:instant="true" />