Xamarin Android谷歌地图应用程序地图是空白的,没有错误

我正在开发Monodroid安卓应用.我已经添加了带有片段的谷歌地图,但地图不会显示,我也没有收到任何错误.

我的Axml代码：

<fragment
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        class="com.google.android.gms.maps.MapFragment" />

活动代码：

protected async override void OnResume()
    {
        base.OnResume();


        tblLocations location = Nav.GetAndRemoveParameter<tblLocations>(Intent);
        LatLng latLng = new LatLng(location.Latitude,location.Longitude);
        CameraPosition.Builder builder = CameraPosition.InvokeBuilder();
        builder.Target(latLng);
        builder.Zoom(5);

        CameraPosition cameraPosition = builder.Build();
        CameraUpdate cUpdate = CameraUpdateFactory.NewCameraPosition(cameraPosition);

        mapFrag = (MapFragment)FragmentManager.FindFragmentById(Resource.Id.map);
        map = mapFrag.Map;
        if (map != null)
        {
            map.MoveCamera(cUpdate);
        }
    }

我意识到这是API密钥,但我在这里缺少什么？

记录CAT输出

04-01 16:40:24.662 D/ChimeraFileApk(20730): Classloading successful. Optimized code found.
    04-01 16:40:24.730 E/NEW_BHD (20811): Battery Power Supply logging Daemon start!!!!!
    04-01 16:40:24.730 E/NEW_BHD (20811): Cannot run on production devices!
    04-01 16:40:24.755 I/Google Maps Android API(20730): Google Play services client version: 848700004-01 16:40:24.755 I/Google Maps Android API(20730): Google Play services client version: 8487000
    04-01 16:40:24.764 I/Google Maps Android API(20730): Google Play services package version: 8703436
    04-01 16:40:24.804 I/art     (20530): CollectorTransition marksweep + semispace GC freed 471(-32KB) AllocSpace objects,0(0B) LOS objects,24% free,7MB/9MB,paused 16.348ms total 16.348ms
    04-01 16:40:25.088 D/VoldConnector( 2225): SND -> {10 volume mkdirs /storage/emulated/0/Android/data/asked.askeduniversalremote/cache/}
    04-01 16:40:25.220 D/Mono    (20730): Assembly Ref addref Xamarin.GooglePlayServices.Maps[0xb9b18688] -> Xamarin.GooglePlayServices.Basement[0xb9b148d0]: 2
    04-01 16:40:25.283 I/b       (20730): Sending API token request.
    04-01 16:40:25.316 I/Keyboard.Facilitator( 3831): onFinishinput()
    04-01 16:40:25.357 I/LaunchCheckinHandler( 2225): displayed asked.askeduniversalremote/md5d1d3b2ca018abe66d5a9f8b4db614c6f.ViewOtherLocationOnMapActivity,wp,ca,947
    04-01 16:40:25.357 I/ActivityManager( 2225): displayed asked.askeduniversalremote/md5d1d3b2ca018abe66d5a9f8b4db614c6f.ViewOtherLocationOnMapActivity: +947ms
    04-01 16:40:25.372 E/NetlinkEvent(  299): NetlinkEvent::Findparam(): Parameter 'UID' not found
    04-01 16:40:25.612 I/b       (20730): Received API Token: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    04-01 16:40:25.612 I/c       (20730): Scheduling next attempt in 431700 seconds.
    04-01 16:40:25.615 I/d       (20730): Saved auth token
    04-01 16:40:25.719 I/SFPerftracer(  258):      triggers: (rate: 7:437) (compose: 1:20) (post: 0:21) (render: 2:51) (6:7515 frames) (7:10501)
    04-01 16:40:25.719 D/SFPerftracer(  258):        layers: (3:12) (FocusedStackFrame (0xb782cb78): 0:383)* (DimLayer (0xb786b8f0): 0:2)* (StrictModeFlash (0xb7804b60): 0:50)* (StatusBar (0xb780a350): 0:2953) (com.android.systemUI.ImageWallpaper (0xb781e148): 0:163)* (NavigationBar (0xb78a5528): 0:402) (DimLayer (0xb7892338): 1:14)* (asked.askeduniversalremote/md5d1d3b2ca018abe66d5a9f8b4db614c6f.WaitTimeActivity (0xb789fa28): 0:51)- (asked.askeduniversalremote/md5d1d3b2ca018abe66d5a9f8b4db614c6f.ViewOtherSitesActivity (0xb78aef90): 0:108)- (asked.askeduniversalremote/md5d1d3b2ca018abe66d5a9f8b4db614c6f.ViewOtherLocationOnMapActivity (0xb789f9e0): 7:25) 
    04-01 16:40:27.516 D/audio_hw_primary(  303): out_standby: enter: stream (0xb7690308) usecase(1: low-latency-playback)04-01 16:40:27.516 D/audio_hw_primary(  303): out_standby: enter: stream (0xb7690308) usecase(1: low-latency-playback)
    04-01 16:40:27.616 D/hardware_info(  303): hw_info_append_hw_type : device_name = speaker04-01 16:40:27.616 D/hardware_info(  303): hw_info_append_hw_type : device_name = speaker
    04-01 16:40:29.766 E/NEW_BHD (20866): Cannot run on production devices!
    04-01 16:40:31.127 D/Mono    (20730): [0x9e1ff930] worker finishing
    04-01 16:40:31.167 D/WifiStateMachine( 2225): starting scan for 
    04-01 16:40:34.778 D/SLPC    ( 3416): slpc_poll_loop(): handled 1
    04-01 16:40:34.778 D/SLPC    ( 3416): slpc_poll_handle_event(): transition
    04-01 16:40:34.778 D/SLPC    ( 3416): slpc_poll_loop(): about to poll...
    04-01 16:40:34.778 D/sensorhub( 3416): sensorhub_poll() polling...
    04-01 16:40:34.796 E/NEW_BHD (20867): Battery Power Supply logging Daemon start!!!!!
    04-01 16:40:34.797 E/NEW_BHD (20867): Cannot run on production devices!
    04-01 16:40:35.292 D/NetlinkSocketobserver( 2225): NeighborEvent{elapsedMs=6311820,192.168.105.1,[C86C870B13EB],RTM_NEWNEIGH,NUD_STALE}
    04-01 16:40:35.783 V/AlarmManager( 2225): sending alarm {58361af type 2 *walarm*:com.motorola.slpc.ALARM_STOWED}
    04-01 16:40:35.786 D/ModalityService( 3416): StowedListener(): callback onStowedChange() -> 2
    04-01 16:40:35.787 V/AlarmManager( 2225): done {58361af,*walarm*:com.motorola.slpc.ALARM_STOWED} [4ms]
    04-01 16:40:35.787 D/ModalityManager( 5416): onStowedChange() -> 2,package: com.motorola.actions

UPDATE
Logcat现在显示以下警告

04-04 09:30:07.355 W/ctxmgr  ( 4204): [AclManager]checkPermissionTypestatus: no inject permission for { uid=10019,packageName=com.google.android.gms }. Returned permission was: PACKAGE_NOT_WHITELISTED for context name=POWER_CONNECTION,account=account#-517948760#
 04-04 09:30:07.358 W/ctxmgr  ( 4204): [AclManager]checkPermissionTypestatus: no inject permission for { uid=10019,account=account#-517948760#

解决方法

确保提供给您的Google Api控制台的哈希是正确的,您可以提供两个哈希值,一个用于debug.keystore,另一个用于生产密钥库.

要检查散列是否正确,请使用debug / production keystore运行您的应用程序检查此代码段的日志输出(它是Java,但我相信Xamarin中有类似的API)并将其与API控制台中的API进行比较：

PackageInfo info;
try {
    info = getPackageManager().getPackageInfo("com.you.name",PackageManager.GET_SIGNATURES);
    for (Signature signature : info.signatures) {
        MessageDigest md;
        md = MessageDigest.getInstance("SHA");
        md.update(signature.toByteArray());
        String something = new String(Base64.encode(md.digest(),0));
        //String something = new String(Base64.encodeBytes(md.digest()));
        Log.e("hash key",something);
    }
} catch (NameNotFoundException e1) {
    Log.e("name not found",e1.toString());
} catch (NoSuchAlgorithmException e) {
    Log.e("no such an algorithm",e.toString());
} catch (Exception e) {
    Log.e("exception",e.toString());
}