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目標：向Android客戶端發送ping。我在我的用戶對象中保存了一系列設備註冊ID。帶有GCM的App Engine到Android客戶端
在GCMIntentService.java，我的應用程序中創建的汽車，我得到的註冊ID這裏
/**
* Called back when a registration token has been received from the Google
* Cloud Messaging service.
*
* @param context
* the Context
*/
@Override
public void onRegistered(Context context, String registration) {
Log.d(TAG, "onRegistered(context, registration), Registration: " + registration);
，然後創建DeviceInfo對象（也預置了應用引擎定義），然後這個ID添加到用戶通過另一個端點。我已經證實了這個作品/看到持有的字符串，並假設我的設備現在已正確註冊。
當某些事情在後臺發生，我有一個自定義通知類，並運行此方法：
public void sendNotificationPingToUsers(
@Named("userIds") ArrayList<Long> userIds,
ZeppaNotification notification) throws IOException {
Sender sender = new Sender(Constants.SENDER_ID);
PersistenceManager mgr = getPersistenceManager();
try {
ArrayList<String> allDevices = new ArrayList<String>();
for (int i = 0; i < userIds.size(); i++) {
long userId = userIds.get(i);
ZeppaUser zeppaUser = mgr
.getObjectById(ZeppaUser.class, userId);
if (zeppaUser != null) {
ZeppaNotification specificNotification = new ZeppaNotification();
specificNotification.setToUserId(userId);
specificNotification.setFromUserId(notification
.getFromUserId());
specificNotification.setEventId(notification.getEventId());
specificNotification.setExtraMessage(notification
.getExtraMessage());
specificNotification.setNotificationType(notification
.getType());
String extraMessage = specificNotification
.getExtraMessage();
if (extraMessage.length() > 1000) {
extraMessage = extraMessage.substring(0, 1000)
+ "[...]";
}
mgr.makePersistent(specificNotification);
allDevices.addAll(zeppaUser.getDevices());
}
}
if (!allDevices.isEmpty()) {
Message msg = new Message.Builder().collapseKey("sendToSync")
.build();
MulticastResult result = sender.send(msg, allDevices, 5);
result.getTotal();
}
} catch (IOException ex) {
ex.printStackTrace();
} finally {
mgr.close();
}
}
我通過在其他通知，以便我可以重新創建它的所有用戶，將其保持在通知表，然後ping該設備，以便它可以拉這個和任何其他人看不見，並創建一個狀態欄通知。
這個方法，又在GCMIntentService：
@Override
public void onMessage(Context context, Intent intent) {
Log.d(TAG, "received message ping");
不會被調用而這正是我試圖處理所有從事物的設備端。任何人都可以指出我可能做錯了什麼，或者如果我錯誤地解釋了這種服務的工作方式？
謝謝
<?xml version="1.0" encoding="utf-8" standalone="no"?>
<uses-sdk
android:minSdkVersion="15"
android:targetSdkVersion="19" />
<permission
android:name="com.minook.zeppa.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.minook.zeppa.permission.C2D_MESSAGE" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.READ_CALENDAR" />
<uses-permission android:name="android.permission.WRITE_CALENDAR" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<application
android:name=".ZeppaApplication"
android:allowBackup="true"
android:icon="@drawable/zeppa_icon"
android:label="@string/app_name"
android:testOnly="false"
android:theme="@style/ZeppaTheme"
android:uiOptions="none" >
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<activity
android:name=".LoginActivity"
android:label="@string/app_name"
android:logo="@drawable/zeppa_icon"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".CreateAccountActivity"
android:label="@string/create_account"
android:logo="@drawable/zeppa_icon" >
</activity>
<activity
android:name=".NewFriendsActivity"
android:label="@string/add_friends"
android:logo="@drawable/zeppa_icon" >
</activity>
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
</activity>
<activity
android:name=".EventViewActivity"
android:label="@string/app_name"
android:logo="@drawable/zeppa_icon" >
</activity>
<activity
android:name=".NewEventActivity"
android:label="@string/app_name"
android:logo="@drawable/zeppa_icon" >
</activity>
<activity
android:name=".UserActivity"
android:label="@string/app_name"
android:logo="@drawable/zeppa_icon" >
</activity>
<activity
android:name=".ZeppaPreferenceActivity"
android:label="@string/event_details"
android:logo="@drawable/zeppa_icon" >
</activity>
<!--
<activity
android:name=".RegisterActivity"
android:launchMode="singleTop" >
</activity>
-->
<service android:name=".GCMIntentService" />
<receiver
android:name="com.google.android.gcm.GCMBroadcastReceiver"
android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<category android:name="com.minook.zeppa" />
</intent-filter>
<intent-filter>
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="com.minook.zeppa" />
</intent-filter>
</receiver>
</application>
另注：我一直在使用的項目數，並通過與沒有指定IP的GAE控制檯生成的服務器密鑰嘗試。迄今爲止都沒有工作。
請張貼您的清單。 – Eran
任何想法..？ – PSchuette
您的服務器從Google獲得什麼響應？ – Eran