连接到 Google API 客户端时出现问题
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【中文标题】连接到 Google API 客户端时出现问题【英文标题】：Issue while connecting to Google API client 【发布时间】：2015-10-27 17:20:26 【问题描述】：我正在构建一个 chromecast 应用程序。我可以使用静态文本启动接收器。但是，我无法与它交互（播放媒体）并且正在获取
10-27 10:01:20.192 2292-6161/? E/MDM: [217] b.run: Couldn't connect to Google API client: ConnectionResultstatusCode=API_UNAVAILABLE, resolution=null, message=null
我认为这可能是我在启动应用程序时遇到超时（状态代码 15）的问题。我还注意到接收器屏幕在一段时间后停止投射，而我的发送器设备没有检测到这一点，仍然认为这是一个正在进行的会话。有人看到问题了吗？
请参阅下面的代码以供参考。
public class MediaRouterButtonActivity extends FragmentActivity
private static final String TAG = MediaRouterButtonActivity.class
.getSimpleName();
private MediaRouter mMediaRouter;
private MediaRouteSelector mMediaRouteSelector;
private MediaRouter.Callback mMediaRouterCallback;
private MediaRouteButton mMediaRouteButton;
private int mRouteCount = 0;
private MediaMetadata mMediaMetadata;
private CastDevice mSelectedDevice;
private GoogleApiClient mApiClient;
private Cast.Listener mCastListener;
private ConnectionCallbacks mConnectionCallbacks;
private RemoteMediaPlayer mRemoteMediaPlayer;
private boolean mWaitingForReconnect;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.media_router_button);
mMediaRouter = MediaRouter.getInstance(getApplicationContext());
mMediaRouteSelector = new MediaRouteSelector.Builder()
.addControlCategory(
CastMediaControlIntent.categoryForCast(getResources().getString(R.string.app_id))).build();
// Set the MediaRouteButton selector for device discovery.
mMediaRouteButton = (MediaRouteButton) findViewById(R.id.media_route_button);
mMediaRouteButton.setRouteSelector(mMediaRouteSelector);
mMediaRouterCallback = new MediaRouterCallback();
mCastListener = new CastListener();
mConnectionCallbacks = new ConnectionCallbacks();
mConnectionFailedListener = new ConnectionFailedListener();
mWaitingForReconnect = false;
mRemoteMediaPlayer = new RemoteMediaPlayer();
@Override
protected void onStart()
super.onStart();
mMediaRouter.addCallback(mMediaRouteSelector, mMediaRouterCallback,
MediaRouter.CALLBACK_FLAG_PERFORM_ACTIVE_SCAN);
@Override
protected void onResume()
super.onResume();
// Add the callback to start device discovery
mMediaRouter.addCallback(mMediaRouteSelector, mMediaRouterCallback,
MediaRouter.CALLBACK_FLAG_REQUEST_DISCOVERY);
@Override
protected void onPause()
mMediaRouter.removeCallback(mMediaRouterCallback);
super.onPause();
@Override
protected void onStop()
setSelectedDevice(null);
mMediaRouter.removeCallback(mMediaRouterCallback);
super.onStop();
private class MediaRouterCallback extends MediaRouter.Callback
@Override
public void onRouteAdded(MediaRouter router, RouteInfo route)
Log.d(TAG, "onRouteAdded");
if (++mRouteCount >= 1)
// Show the button when a device is discovered.
mMediaRouteButton.setVisibility(View.VISIBLE);
@Override
public void onRouteRemoved(MediaRouter router, RouteInfo route)
Log.d(TAG, "onRouteRemoved");
if (--mRouteCount == 0)
// Hide the button if there are no devices discovered.
mMediaRouteButton.setVisibility(View.GONE);
@Override
public void onRouteSelected(MediaRouter router, RouteInfo info)
Log.d(TAG, "onRouteSelected");
// Handle route selection
mSelectedDevice = CastDevice.getFromBundle(info.getExtras());
setSelectedDevice(mSelectedDevice);
@Override
public void onRouteUnselected(MediaRouter router, RouteInfo info)
Log.d(TAG, "onRouteUnselected: info=" + info);
setSelectedDevice(null);
private void setSelectedDevice(CastDevice device)
Log.d(TAG, "setSelectedDevice: " + device);
mSelectedDevice = device;
if (mSelectedDevice != null)
try
disconnectApiClient();
connectApiClient();
catch (IllegalStateException e)
Log.w(TAG, "Exception while connecting API client", e);
disconnectApiClient();
else
if (mApiClient != null)
disconnectApiClient();
mMediaRouter.selectRoute(mMediaRouter.getDefaultRoute());
private void connectApiClient()
Cast.CastOptions apiOptions = Cast.CastOptions.builder(mSelectedDevice, mCastListener)
.build();
mApiClient = new GoogleApiClient.Builder(getApplicationContext())
.addApi(Cast.API, apiOptions)
.addConnectionCallbacks(mConnectionCallbacks)
.addOnConnectionFailedListener(mConnectionFailedListener)
.build();
Log.d(TAG, "connectApiClient");
mApiClient.connect();
private void disconnectApiClient()
if (mApiClient != null)
if (mApiClient.isConnected() || mApiClient.isConnecting())
mApiClient.disconnect();
Log.d(TAG, "disconnectApiClient");
mApiClient = null;
private class ConnectionCallbacks implements GoogleApiClient.ConnectionCallbacks
@Override
public void onConnectionSuspended(int cause)
mWaitingForReconnect = true;
Log.d(TAG, "ConnectionCallbacks.onConnectionSuspended");
@Override
public void onConnected(Bundle connectionHint)
Log.d(TAG, "ConnectionCallbacks.onConnected");
if (mWaitingForReconnect)
mWaitingForReconnect = false;
else
Cast.CastApi.launchApplication(mApiClient, getResources().getString(R.string.app_id))
.setResultCallback(new ConnectionResultCallback());
private final class ConnectionResultCallback implements
ResultCallback<ApplicationConnectionResult>
@Override
public void onResult(ApplicationConnectionResult result)
Status status = result.getStatus();
Log.d(TAG, "onResultOnConnected" + status.isSuccess());
if (status.isSuccess())
try
Cast.CastApi.setMessageReceivedCallbacks(mApiClient,
mRemoteMediaPlayer.getNamespace(),
mRemoteMediaPlayer);
JSONObject customData = new JSONObject();
String accessToken = "asdkfalksdjfkaljsdfla";
try
customData.put("X-At", accessToken);
catch (JSONException e)
Log.e(TAG, "Empty Access Token", e);
Log.d(TAG, "mediaMetaDataDebug");
mMediaMetadata = new MediaMetadata(MediaMetadata.MEDIA_TYPE_MOVIE);
mMediaMetadata.putString(MediaMetadata.KEY_TITLE, "Demo Video");
MediaInfo mediaInfo = new MediaInfo.Builder(
"https://abcdef.com") //link Instead
.setStreamType(MediaInfo.STREAM_TYPE_BUFFERED)
.setCustomData(customData)
.build();
try
mRemoteMediaPlayer.load(mApiClient, mediaInfo, true)
.setResultCallback(new ResultCallback<RemoteMediaPlayer.MediaChannelResult>()
@Override
public void onResult(RemoteMediaPlayer.MediaChannelResult mediaChannelResult)
Status status = mediaChannelResult.getStatus();
if (status.isSuccess())
//allow users to pause video somehow;
);
catch (Exception e)
Log.e(TAG, "Problem while loading media", e);
Log.d(TAG, "wtf");
catch (IOException e)
Log.e(TAG, "Exception while creating channel", e);
else
Log.d(TAG, "ConnectionResultCallback. Unable to launch the application. statusCode: "
+ status.getStatusCode());
//google play services crap, fix later
private class CastListener extends Cast.Listener
@Override
public void onApplicationDisconnected(int statusCode)
Log.d(TAG, "onApplicationDisconnected");
setSelectedDevice(null);
try
Cast.CastApi.removeMessageReceivedCallbacks(mApiClient,
mRemoteMediaPlayer.getNamespace());
catch (IOException e)
Log.w(TAG, "Exception while launching application", e);
这是我得到的相关日志
10-27 10:01:20.192 2292-6161/? E/MDM: [217] b.run: Couldn't connect to Google API client: ConnectionResultstatusCode=API_UNAVAILABLE, resolution=null, message=null
10-27 10:59:54.962 2292-19493/? D/DeviceConnectionService: client connected with version: 8115000
10-27 11:01:12.922 27024-27024/? D/MediaRouterButtonActivity: ConnectionCallbacks.onConnected
10-27 11:01:13.002 2292-6727/? D/DeviceConnectionService: client connected with version: 8115000
10-27 11:01:33.952 27024-27024/? D/MediaRouterButtonActivity: ConnectionResultCallback. Unable to launch the application. statusCode: 15
【问题讨论】：
它声明 API 不可用，那么您的设备是否有 Play 服务？另一方面，如果你没有连接，你是如何启动你的接收器的？需要更多代码和日志 @Ali Naddaf 是的，我的设备可以与其他示例应用程序一起使用，所以我假设可以。我能够启动应用程序，这意味着直到 ConnectionResultCallbacks，一切似乎都正常工作......但在那之后，接收器似乎变得无响应并在一段时间后自行断开连接。感谢您的帮助！ 请查看this Google 开发者指南，它可能会对您有所帮助。 为了排除由于您自己的接收器而出现问题的可能性，我建议您将您的应用程序 ID 替换为默认应用程序 ID（使用 CastMediaControlIntent.DEFAULT_MEDIA_RECEIVER_APPLICATION_ID），看看会发生什么，在我看来您正在使用标准 API，因此它应该能够与默认接收器一起使用。让我们知道结果如何。 如果您可以在某个地方分享您的应用程序供我抓取，我可以快速浏览一下 【参考方案1】：以下更改使其在我的环境中工作：
-
将应用 ID 更改为我可以访问的内容；您可以使用 CastVideos 应用使用的默认应用 ID 或 4F8B3483，也可以创建自己的样式接收器。
MediaInfo 需要有一个内容类型，因此在定义 MediaInfo 的位置添加了以下内容：'.setContentType("video/mp4")'
将内容的 url 更新为真实存在且可访问的内容（公共服务器上的 mp4 媒体）
然后我能够启动应用程序并通过单击“媒体路由按钮”查看媒体播放
【讨论】：
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