Android Cast 应用程序中的“GoogleApiClient 尚未连接”异常

"GoogleApiClient is not connected yet" exception in Cast application

提问by joaomgcd

I'm developing an Android application that casts content to Chromecast. Sometimes in my com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacksimplementation in the onConnectedmethod, I get a

我正在开发一个将内容投射到 Chromecast 的 Android 应用程序。有时在我com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks的onConnected方法实现中，我得到一个

java.lang.IllegalStateException: GoogleApiClient is not connected yet.

exception.

例外。

Here is the stack trace:

这是堆栈跟踪：

    FATAL EXCEPTION: main
 Process: com.joaomgcd.autocast, PID: 13771
 java.lang.IllegalStateException: GoogleApiClient is not connected yet.
    at com.google.android.gms.internal.eg.a(Unknown Source)
    at com.google.android.gms.common.api.GoogleApiClient.b(Unknown Source)
    at com.google.android.gms.cast.Cast$CastApi$a.launchApplication(Unknown Source)
    at com.joaomgcd.autocast.media.MediaConnectionCallbacks.onConnected(MediaConnectionCallbacks.java:37)
    at com.google.android.gms.internal.dx.b(Unknown Source)
    at com.google.android.gms.common.api.GoogleApiClient.bn(Unknown Source)
    at com.google.android.gms.common.api.GoogleApiClient.f(Unknown Source)
    at com.google.android.gms.common.api.GoogleApiClient.onConnected(Unknown Source)
    at com.google.android.gms.internal.dx.b(Unknown Source)
    at com.google.android.gms.internal.dx.bT(Unknown Source)
    at com.google.android.gms.internal.dw$h.b(Unknown Source)
    at com.google.android.gms.internal.dw$h.b(Unknown Source)
    at com.google.android.gms.internal.dw$b.bR(Unknown Source)
    at com.google.android.gms.internal.dw$a.handleMessage(Unknown Source)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5017)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
    at dalvik.system.NativeStart.main(Native Method)

This only seems to happen if I had already connected to the GoogleApiClient before and am connecting for a second time. Between the 2 calls I disconnect from the api client with the code below.

这似乎只有在我之前已经连接到 GoogleApiClient 并且第二次连接时才会发生。在两次调用之间，我使用以下代码与 api 客户端断开连接。

My guess is that this is a bug. Am I correct? Since I'm in the onConnectedmethod, the GoogleApiClient should already be connected.

我的猜测是这是一个错误。我对么？由于我在onConnected方法中，因此应该已经连接了 GoogleApiClient。

What can I do to get around it? Should I just wait for a while until the GoogleApiClient is really connected?

我能做些什么来解决它？我应该等待一段时间直到 GoogleApiClient 真正连接吗？

I am doing this in a service and here are the relevant bits:

我在一个服务中这样做，这里是相关的位：

when the service starts:

服务启动时：

mMediaRouter.addCallback(mMediaRouteSelector, mediaCallback, MediaRouter.CALLBACK_FLAG_PERFORM_ACTIVE_SCAN);

mediaCallback has this code:

mediaCallback 具有以下代码：

@Override
    public void onRouteAdded(MediaRouter router, RouteInfo route) {
        super.onRouteAdded(router, route);
        if (route.getDescription().equals("Chromecast")) {
            ...
            mSelectedDevice = com.google.android.gms.cast.CastDevice.getFromBundle(route.getExtras());

            ...
                castClientListener = new CastListener(context, apiClient);

                Cast.CastOptions.Builder apiOptionsBuilder = Cast.CastOptions.builder(mSelectedDevice, castClientListener);
                ...
                apiClient.set(new GoogleApiClient.Builder(context).addApi(Cast.API, apiOptionsBuilder.build()).addConnectionCallbacks(connectionCallback).addOnConnectionFailedListener(new MediaConnectionFailedListener(context)).build());
                apiClient.get().connect();
        }

    }

connectionCallback has this code:

connectionCallback 有这个代码：

@Override
    public void onConnected(final Bundle arg0) {
        ...
            Cast.CastApi.launchApplication(apiClient, UtilAutoCast.CHROMECAST_APP_ID, false).setResultCallback(connectionCallback);
        ...
    }

The code above is the part where the crash happens.

上面的代码是发生崩溃的部分。

And when I stop the service I run this code:

当我停止服务时，我运行以下代码：

if (mMediaRouter != null) {
    mMediaRouter.removeCallback(mediaCallback);
    mMediaRouter = null;
}
if (apiClient != null) {
    Cast.CastApi.stopApplication(apiClient);
    if (apiClient.isConnected()) {
        apiClient.disconnect();
        apiClient = null;
    }
}

Thanks in advance.

提前致谢。

回答by mattm

Google APIs for Android > GoogleApiClient

适用于 Android 的 Google API > GoogleApiClient

You should instantiate a client object in your Activity's onCreate(Bundle) method and then call connect() in onStart() and disconnect() in onStop(), regardless of the state.

无论状态如何，您都应该在 Activity 的 onCreate(Bundle) 方法中实例化一个客户端对象，然后在 onStart() 中调用 connect() 并在 onStop() 中调用 disconnect()。

The implementation of the GoogleApiClientappears designed for only a single instance. It's best to instantiate it only once in onCreate, then perform connections and disconnections using the single instance.

的实现GoogleApiClient似乎只为单个实例设计。最好只在 中实例化一次onCreate，然后使用单个实例执行连接和断开连接。

I would guess that only one GoogleApiClientcan be actually be connected, but multiple instances are receiving the onConnectedcallback.

我猜GoogleApiClient实际上只能连接一个，但是多个实例正在接收onConnected回调。

In your case it's probably fine to not call connectin onStart, but only in onRouteAdded.

在你的情况下，不调用可能没connect问题onStart，但只调用onRouteAdded.

I think this issue is very similar to Fatal Exception: java.lang.IllegalStateException GoogleApiClient is not connected yet

我认为这个问题与Fatal Exception: java.lang.IllegalStateException GoogleApiClient is not connected yet非常相似

回答by Pratik Butani

Have you declare following <meta>tag

您是否声明了以下<meta>标签

<application ...> 
... 
    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />
... 
</application>

I just forgot to write so may you also stuck with this reason.

我只是忘记写了，所以可能你也坚持这个原因。

Thank you.

谢谢你。

回答by Drez

From showcase app (Googlecast Github Sample CastHelloText-android) receiver app is launched onRouteSelected (not onRouteAdded as you are doing in your code). I would try to change that. In case it does not work, I would add log lines in every method related to connection & session, and see what is happening.

从展示应用程序（Googlecast Github Sample CastHelloText-android）接收器应用程序启动 onRouteSelected （而不是您在代码中所做的 onRouteAdded ）。我会尝试改变这一点。如果它不起作用，我会在与连接和会话相关的每个方法中添加日志行，看看发生了什么。

Another tip: I have had crash with stopping the application (in case chromecast device is physically plugged out from power). Solution is to putCast.CastApi.stopApplication(apiClient);inside if (apiClient.isConnected()).

另一个提示：我在停止应用程序时崩溃了（以防 chromecast 设备从电源物理上拔掉）。解决办法是放在Cast.CastApi.stopApplication(apiClient);里面if (apiClient.isConnected())。

回答by Deepak

It seems like you are calling GoogleApiClient before it is connected

似乎您在连接之前调用了 GoogleApiClient

move this line in onCreate()

在 onCreate() 中移动这一行

// First we need to check availability of play services
    if (checkPlayServices()) {

        // Building the GoogleApi client
        //buildGoogleApiClient();
        try {
            mGoogleApiClient = new GoogleApiClient.Builder(this).addConnectionCallbacks(this).addOnConnectionFailedListener(this).addApi(LocationServices.API).build();

            mGoogleApiClient.connect();
        }catch (IllegalStateException e)
        {
            Log.e("IllegalStateException", e.toString());
        }
        createLocationRequest();
    }

Hope it helps you.

希望对你有帮助。