Android 谷歌云消息传递示例无法正常工作

我正在关注这里的教程http://developer.android.com/google/gcm/gs.html http://developer.android.com/google/gcm/gs.html为了设置 GCM。 我目前正在尝试注册设备。 然而，由于某种原因，应用程序似乎总是崩溃 gcm = GoogleCloudMessaging.getInstance(this);

堆栈跟踪似乎指向以下内容： 06-18 13：42：20.909：I / dalvikvm（11613）：找不到方法com.google.android.gms.gcm.GoogleCloudMessaging.getInstance，从方法pushNotification.PushNotification$1.run引用

这是我迄今为止所拥有的示例

public PushNotification(Context c, Activity activity)
{
    context = c;
    this.activity = activity;
    regid = getRegistrationId(context);

    if (regid.length() == 0) {
        Log.d("IN PUSHNOTIFICATION ","NOT REGISTERED. REGISTERING NOW.....");
        registerBackground();
    }
    Log.d("IN PUSHNOTIFICATION ","REGISTRATION COMPLETE.....");
    Log.d("IN PUSHNOTIFICATION ","REGISTRATION ID IS: " + regid);
    gcm = GoogleCloudMessaging.getInstance(activity); //never reaches this code

}

private void registerBackground() {

    Thread thread = new Thread(new Runnable()
    {
        public void run()
        {
            String msg = "";
            try {
                if (gcm == null) {
                    Log.d("IN PUSHNOTIFICATION", "IN BACKGROUND. gcm == NULL");
                    gcm = GoogleCloudMessaging.getInstance(context);
                    Log.d("IN PUSHNOTIFICATION", "IN BACKGROUND. AFTER gcm.GETINSTANCE");
                }
                Log.d("IN PUSHNOTIFICATION", "IN BACKGROUND. BEFORE gcm.register");
                regid = gcm.register(SENDER_ID);
                msg = "Device registered, registration id=" + regid;
                Log.d("IN PUSHNOTIFICATION", "IN BACKGROUND. regid == " + regid);
                // You should send the registration ID to your server over HTTP,
                // so it can use GCM/HTTP or CCS to send messages to your app.

                // For this demo: we don't need to send it because the device
                // will send upstream messages to a server that echo back the message
                // using the 'from' address in the message.

                // Save the regid - no need to register again.
                setRegistrationId(context, regid);
            } catch (IOException ex) {
                Log.d("IN PUSHNOTIFICATION", "IN BACKGROUND. EXCEPTION ERROR ERROR: ex = " + ex.getMessage());
                msg = "Error :" + ex.getMessage();
            }
        }
    }
    );
    thread.start();
}

这是完整的堆栈跟踪

06-18 13:42:20.909：D/IN 推送通知 (11613)：未注册。 立即注册...... 06-18 13:42:20.909：I/dalvikvm(11613)：无法 查找方法 com.google.android.gms.gcm.GoogleCloudMessaging.getInstance， 从方法pushNotification.PushNotification$1.run 引用 06-18 13:42:20.909：W/dalvikvm(11613)：VFY：无法解析静态方法 5967: Lcom/google/android/gms/gcm/GoogleCloudMessaging;.getInstance (Landroid/content/Context;)Lcom/google/android/gms/gcm/GoogleCloudMessaging; 06-18 13:42:20.909: D/dalvikvm(11613): VFY: 替换操作码 0x71 0x0015 06-18 13:42:20.909: I/dalvikvm(11613): 找不到方法 com.google.android.gms.gcm.GoogleCloudMessaging.register，引用 来自方法pushNotification.PushNotification$1.run 06-18 13:42:20.909：W/dalvikvm(11613)：VFY：无法解析虚拟方法 5969: Lcom/google/android/gms/gcm/GoogleCloudMessaging;.注册 ([Ljava/lang/String;)Ljava/lang/String; 06-18 13:42:20.909: D/dalvikvm(11613)：VFY：替换 0x0039 06-18 处的操作码 0x6e 13:42:20.909：D/IN 推送通知（11613）：注册完成...... 06-18 13:42:20.909：D/IN 推送通知 (11613)：注册 ID 是： 06-18 13:42:20.909: D/AndroidRuntime(11613): 关闭虚拟机 06-18 13:42:20.909: W/dalvikvm(11613): threadid=1: 线程退出 未捕获的异常（组=0x2b542210）06-18 13:42:20.909：D/IN 推送通知 (11613)：在后台。 gcm==NULL 06-18 13:42:20.909: W/dalvikvm(11613): threadid=20: 线程退出 未捕获的异常（组=0x2b542210）06-18 13:42:20.909： I/Process(11613)：发送信号。 PID：11613 SIG：9 06-18 13:42:20.919：I/ActivityManager(278)：进程 com.gotoohlala（pid 11613）已经去世。

我解决了这个问题。 虽然我链接到 google-play-services_lib 项目，但我还必须将 jar 文件 google-play-services_lib.jar 添加到项目中。