Образец кода Api V2 Google Map Android не работает

Я попытался использовать образец кода Google Map, прежде чем был предоставлен в Google_Play_SERVICE/SAMPLE, используя все доступные параметры, и он показал ниже Log.

01-14 17: 58: 39.773: E/API Google Maps для Android (13114): авторизация провал.

Он показал мне пустой экран для всех вариантов карты образца.

Теперь я создал новый проект и вот его полный код:

Activity.java

public class MapActivity extends FragmentActivity
{
    private Context context = this;

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

        GoogleMap gMap = ((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map)).getMap();

        int result = GooglePlayServicesUtil.isGooglePlayServicesAvailable(context);
        Log.e("Maps", "Result int value::" + result);
        switch (result) {
        case ConnectionResult.SUCCESS:
            Log.e("Maps", "RESULT:: SUCCESS");          
            break;

        case ConnectionResult.DEVELOPER_ERROR:
            Log.e("Maps", "RESULT:: DE");           
            break;

        case ConnectionResult.INTERNAL_ERROR:
            Log.e("Maps", "RESULT:: IE");           
            break;

        case ConnectionResult.INVALID_ACCOUNT:
            Log.e("Maps", "RESULT:: IA");           
            break;

        case ConnectionResult.NETWORK_ERROR:
            Log.e("Maps", "RESULT:: NE");           
            break;

        case ConnectionResult.RESOLUTION_REQUIRED:
            Log.e("Maps", "RESULT:: RR");           
            break;

        case ConnectionResult.SERVICE_DISABLED:
            Log.e("Maps", "RESULT:: SD");           
            break;

        case ConnectionResult.SERVICE_INVALID:
            Log.e("Maps", "RESULT:: SI");           
            break;

        case ConnectionResult.SERVICE_MISSING:
            Log.e("Maps", "RESULT:: SM");           
            break;
        case ConnectionResult.SERVICE_VERSION_UPDATE_REQUIRED:
            Log.e("Maps", "RESULT:: SVUR");         
            break;
        case ConnectionResult.SIGN_IN_REQUIRED:
            Log.e("Maps", "RESULT:: SIR");          
            break;      

        default:
            break;
        }
        gMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
        gMap.setMyLocationEnabled(true);
        Log.e("Maps", "------EOC-------");
    }
}

activity_map.xml

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

manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="net.dottech.map"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:maxSdkVersion="17"
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true" />

    <permission
        android:name="net.dottech.map.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />

    <uses-permission android:name="net.dottech.map.permission.MAPS_RECEIVE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <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="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="net.dottech.map.MapActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="removed" />
    </application>

</manifest>

LOG

01-21 13:09:09.243: E/Maps(449): Result int value::0
01-21 13:09:09.243: E/Maps(449): RESULT:: SUCCESS
01-21 13:09:09.243: E/Maps(449): ------EOC-------
01-21 13:09:09.248: D/LocationManagerService(1852): gps location requested by an application
01-21 13:09:09.253: D/SensorManager(449): registerListener :: handle = 0  name= K3DH 
Acceleration Sensor delay= 20000 Listener= [email protected]
01-21 13:09:09.353: D/(449): Device driver API match
01-21 13:09:09.353: D/(449): Device driver API version: 10
01-21 13:09:09.353: D/(449): User space API version: 10 
01-21 13:09:09.353: D/(449): mali: REVISION=Linux-r2p4-02rel0 BUILD_DATE=Fri May  4 10:32:42 KST 2012
01-21 13:09:12.398: D/Sensors(449): Remain listener = Sending .. normal delay 200ms
01-21 13:09:12.398: I/Sensors(449): sendDelay --- 200000000
01-21 13:09:12.398: I/Sensors(1852): setDelay :: handle = 0   delay = 200000000
01-21 13:09:12.398: D/SensorManager(449): JNI - sendDelay
01-21 16:14:17.835: E/Google Maps Android API(12168): Failed to load map.  Could not contact Google servers.

Снимок экрана

Это результат, пустой экран с параметрами масштабирования, отсутствие карты в MapView.

Я следил за каждым шагом, упомянутым в: -

1.) Учебник

2.) Google Map Android Api V2