尽管使用API​​密钥，Google地图仍无法呈现

Question

我为Android应用程序编写代码，我的地图活动看起来像this

google_maps_api.xml中有/res/values，其内容为

<resources>
    <string name="google_maps_key" templateMergeStrategy="preserve" translatable="false">
         MYKEY
    </string>
</resources>

AndroidManifest.xml文件看起来像这样

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="...">
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />

    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />


    <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_key" />

        <activity
            android:name=".Activities. ..." />

        <activity
            android:name=".Activities. ..."
            android:label="..." />

        <activity android:name=".Activities. ...">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

我还确保为我在Google Maps Android API生成API密钥的项目启用了console.developers.google.com。

我可能会失踪吗？

编辑我已尝试创建新的Google地图项目，生成新密钥，与地图相同的结果（它不起作用）。我有什么可能缺失的线索？我还添加了密钥限制的SHA-1和包名称

Answer 1

添加到您的strings.xml API密钥，如下所示：

<string name="google_maps_key">your_key</string>

如果不行：

尝试将您的活动更改为：

public class MapsActivity extends AppCompatActivity implements OnMapReadyCallback {
 private GoogleMap mMap;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_maps);
 SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
 .findFragmentById(R.id.map);
 mapFragment.getMapAsync(this);
 }
 @Override
 public void onMapReady(GoogleMap googleMap) {
 mMap = googleMap;
 // Add a marker in Sydney, Australia, and move the camera.
 LatLng sydney = new LatLng(-34, 151);
 mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
 mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
 }
}

和xml文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical" android:layout_width="match_parent"
 android:layout_height="match_parent">
 <fragment xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 xmlns:map="http://schemas.android.com/apk/res-auto"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:id="@+id/map"
 tools:context="com.example.app.MapsActivity"
 android:name="com.google.android.gms.maps.SupportMapFragment"/>
</LinearLayout>