GCMRegistrar getRegistrationId return empty ID

Question

可能的重复：
Android GCM:GCMRegistrar给出空的注册ID

我遵循了编写服务器端应用程序来在我的应用程序中实现GCM，但

final String regId = GCMRegistrar.getRegistrationId(this);

返回empy。总是

我正确设置了所有权限。

代码是：

public void registerPush(){
GCMRegistrar.checkDevice(this);
GCMRegistrar.checkManifest(this);
final String regId = GCMRegistrar.getRegistrationId(this);
REG_ID = regId;
if (regId.equals("")) {
GCMRegistrar.register(this, this.getString(R.string.SENDER_ID));
} else {
if (GCMRegistrar.isRegisteredOnServer(this)) {
// Skips registration.
} else {
// Try to register again, but not in the UI thread.
// It's also necessary to cancel the thread onDestroy(),
// hence the use of AsyncTask instead of a raw thread.
final Context context = this;
mRegisterTask = new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... params) {
boolean registered = forceRegister(context, regId);
// At this point all attempts to register with the app
// server failed, so we need to unregister the device
// from GCM - the app will try to register again when
// it is restarted. Note that GCM will send an
// unregistered callback upon completion, but
// GCMIntentService.onUnregistered() will ignore it.

if (!registered) {
GCMRegistrar.unregister(context);
}
return null;
}
@Override
protected void onPostExecute(Void result) {
mRegisterTask = null;
}
};
mRegisterTask.execute(null, null, null);
}
}
}

谢谢你的帮助！

编辑：manifest.xml

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<permission
android:name="package.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="package.permission.C2D_MESSAGE" />
<application>
<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" />
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="package" />
</intent-filter>
</receiver>
<service android:name="package.GCMIntentService" />
</application>

Answer 1

为我修复的是设备卡在WAKE LOCK中。

长话短说，日志指出了它试图在这里找到我的服务的事实：

IntentService类：com.myapppackage.GCMIntentService

我希望它指向这里：

IntentService类：com.myapppackage.gcm.GCMIntentService

所以我扩展了广播接收器如下：

package com.myapppackage.gcm;
import android.content.Context;
public class GCMBroadcastReceiver extends
com.google.android.gcm.GCMBroadcastReceiver {
@Override
protected String getGCMIntentServiceClassName(Context context) {
return "com.myapppackage.gcm.GCMIntentService";
}
}

然后我更新了我的清单以反映变化：

<receiver 
android:name="com.myapppackage.gcm.GCMBroadcastReceiver" 
android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="com.myapppackage" />
</intent-filter>
</receiver>

这在这里的文档中有解释(第5点)：

http://developer.android.com/guide/google/gcm/gs.html#android-应用

此意向服务将由GCMBroadcastReceiver(由GCM库提供)。一定是com.google.android.gcm.GCMBaseIntentService的子类，必须包含公共构造函数，并且应命名为my_app_package.GCMIntentService(除非您使用GCMBroadcastReceiver，它重写用于命名服务)。

我能说什么呢，我是金牛座，我喜欢把我的东西整理好！

Answer 2

您正在调用

final String regId = GCMRegistrar.getRegistrationId(this);

之前

GCMRegistrar.register(this, this.getString(R.string.SENDER_ID));

您第一次运行该应用程序时，它尚未注册。

还要检查GCMIntentService类是否有一个空构造函数：

public class GCMIntentService extends GCMBaseIntentService {
public GCMIntentService() {
super(SENDER_ID);
}
@Override
protected void onRegistered(Context context, String registrationId) {       
Log.i("GCMIntentService", "Device registered: regId = " + registrationId);
}
}

并将SENDER_ID设为public static final String SENDER_ID = "YOUR_GOOGLE_PROYECT_ID";。

希望能有所帮助。

Answer 3

当您安装应用程序时，注册id将在第一时间为空。因此，请在此处将字符串regestraionId设置为静态，并更改GCMIntentService.java

@Override
protected void onRegistered(Context context, String registrationId) {
Log.i(TAG, "Device registered: regId = " + registrationId);
yourcallingactivity.regId = registrationId;
CommonUtilities.displayMessage(context, getString(R.string.gcm_registered));
ServerUtilities.register(context, registrationId);
}