我只能看到带有Google徽标的灰色，空白空白窗口

1. 活动fragment_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

    // 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

更多代码

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))
}

1. 已启用SDK，已添加API密钥并在Google API中配置了SHA1

2. 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>
   

3. 在Strings.xml中

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

在Google Map activity项目/应用程序地图中创建的密钥正常工作