Google Awareness API，无效的API密钥，崩溃

这是我第一次尝试创建android应用程序。在尝试使用Google提供的Awareness API时，我在logcat中收到SecurityException，并且出现错误：

“程序包的无效API密钥= com.example.android.project。收到的状态码= 12”。

这意味着，mGoogleApiClient.connect（）会导致应用每次崩溃。反正有什么要知道状态码是什么意思？

[BaseServerTask]Server task (PingTask) got error statusCode=403.
    com.android.volley.AuthFailureError
    at com.android.volley.toolbox.BasicNetwork.performRequest(:com.google.android.gms:32)
    at lbf.performRequest(:com.google.android.gms:3)
    at com.android.volley.NetworkDispatcher.run(:com.google.android.gms:11)
    07-01 15:54:24.303 4839-19074/? E/ctxmgr: [ContextManager3PCredentialsVerifier]Failed ping response: network status=12
    07-01 15:54:24.304 4839-19081/? E/AbstractServiceBroker: Getting service failed

java.lang.SecurityException: Invalid API Key for package = com.example.android.project. Status code received = 12
    at cpm.a(:com.google.android.gms:19)
    at cpp.a(:com.google.android.gms:46)
    at ktv.a(:com.google.android.gms:41)
    at kwh.onTransact(:com.google.android.gms:8)
    at android.os.Binder.transact(Binder.java:507)
    at bxh.onTransact(:com.google.android.gms:2)
    at android.os.Binder.execTransact(Binder.java:573)
    07-01 15:54:24.520 19508-19508/com.example.android.project E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.android.project, PID: 19508

java.lang.SecurityException: Invalid API Key for package = com.example.android.project. Status code received = 12
    at android.os.Parcel.readException(Parcel.java:1693)
    at android.os.Parcel.readException(Parcel.java:1646)
    at com.google.android.gms.common.internal.zzax.zza(Unknown Source)
    at com.google.android.gms.common.internal.zzd.zza(Unknown Source)
    at com.google.android.gms.internal.zzbcj.zzpV(Unknown Source)
    at com.google.android.gms.internal.zzbcn.run(Unknown Source)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428)
    at java.util.concurrent.FutureTask.run(FutureTask.java:237)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
    at com.google.android.gms.internal.zzbgx.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:762)

该错误没有任何意义，因为在开发人员控制台中，我将API密钥设置为没有限制，希望它可以解决此问题，即未锁定到任何项目，并且仍然无法使用。并且在控制台中启用了API。

我尝试了其他主题的建议：无法连接到Google API CLient？，尝试与Google Awareness服务等连接时收到错误。但是问题仍然存在。

public class MainActivity extends AppCompatActivity implements 
GoogleApiClient.OnConnectionFailedListener, 
GoogleApiClient.ConnectionCallbacks {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Connect to Awareness API
        mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addApi(Awareness.API)
            .build();
        mGoogleApiClient.connect(); // the app crashes here

    }
}

最后，我的AndroidManifest：

    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.example.android.project">

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="com.google.android.gms.permission.ACTIVITY_RECOGNITION" />
<uses-permission android:name="android.permission.INTERNET" />

<application
    android:allowBackup="true"
    android:icon="@drawable/appicon"
    android:label="@string/app_name"
    android:roundIcon="@drawable/appicon"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <meta-data
        android:name="com.google.awareness.API_KEY"
        android:value="MY_API_KEY"/>
    <meta-data
        android:name="com.google.android.geo.API_KEY"
        android:value="MY_API_KEY"/>
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>

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

</manifest>

我不知道该怎么办，有人有任何建议吗？

我正在Samsung Galaxy S6（Android版：7.0）上对此进行测试