GCM注册ID为空 [英] GCM Reg ID is empty

问题描述

您好我想实现GCM推送通知。我得到一个空的GCM ID。
这里是我的code：

Hi I am trying to implement GCM push notification. I am getting an empty GCM id. Here is my code:

public void registerClient() {

        try {
        // Check that the device supports GCM (should be in a try / catch)
        GCMRegistrar.checkDevice(this);
        GCMRegistrar.checkManifest(this);
        regId = GCMRegistrar.getRegistrationId(this);


        if (regId.equals("")) {
            registrationStatus = "Registering...";
            GCMRegistrar.register(this, PROJECT_ID);
            regId="sfsaas";
            regId = GCMRegistrar.getRegistrationId(this);
            registrationStatus = "Registration Acquired";
            Log.i("******IN_IF_REGID*****", regId);
            Log.i("INSIDE","if");
        } 
        else 
        {
            Log.i("INSIDE","else");
            registrationStatus = "Already registered";
            Log.i("******REGID*****", regId);
        }

        } 
        catch (Exception e) {
            e.printStackTrace();
            registrationStatus = e.getMessage();
        }

}

下面是我的清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.eventnotifier"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />

<permission
    android:name="com.example.eventnotifier.permission.C2D_MESSAGE"
    android:protectionLevel="signature" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"     />
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
    <uses-permission android:name="android.permission.READ_CONTACTS"/>
    <uses-permission android:name="com.example.eventnotifier.permission.C2D_MESSAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 

<!-- Camera permission -->
    <uses-feature android:name="android.hardware.camera" />
<!-- receives GCM messages -->
    <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />

<!-- GCM connects to Google services -->
    <uses-permission android:name="android.permission.INTERNET" />

<!-- GCM requires a Google account -->
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />

    <uses-permission android:name="android.permission.USE_CREDENTIALS" />

    <uses-permission android:name="android.permission.READ_OWNER_DATA" />

<!-- wake the processor if a GCM message is received -->
    <uses-permission android:name="android.permission.WAKE_LOCK" />
<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@android:color/black" >

    <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="com.example.eventnotifier" />
        </intent-filter>
    </receiver>

    <service android:name=".GCMIntentService" />
        <activity
            android:name="com.example.eventnotifier.HomeActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait" >
        </activity>

        <activity
            android:name="com.example.eventnotifier.RegisterActivity"
            android:label="@string/app_name"
            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="com.example.eventnotifier.DateActivity"
        android:label="@string/app_name" 
        android:screenOrientation="portrait">
     </activity>

    <activity
        android:name="com.example.eventnotifier.DescriptionActivity"
        android:label="@string/app_name" 
        android:screenOrientation="portrait">
     </activity>

     <activity
        android:name="com.example.eventnotifier.MyEventActivity"
        android:label="@string/app_name" 
        android:screenOrientation="portrait">
     </activity>

     <activity
        android:name="com.example.eventnotifier.CreateEventActivity"
        android:label="@string/app_name" 
        android:screenOrientation="portrait">
     </activity>

     <activity
        android:name="com.example.eventnotifier.LocationActivity"
        android:label="@string/app_name" 
        android:screenOrientation="portrait">
     </activity>

     <activity
        android:name="com.example.eventnotifier.AddGuestActivity"
        android:label="@string/app_name" 
        android:screenOrientation="portrait">
     </activity>

     <activity
        android:name="com.example.eventnotifier.ContactListActivity"
        android:label="@string/app_name" 
        android:screenOrientation="portrait">
     </activity>

     <activity
        android:name="com.example.eventnotifier.ContactTest"
        android:label="@string/app_name" 
        android:screenOrientation="portrait">
     </activity>

     <activity
        android:name="com.example.eventnotifier.InvitedGuestsActivity"
        android:label="@string/app_name" 
        android:screenOrientation="portrait">
     </activity>

     <activity
        android:name="com.example.eventnotifier.MyInvitationsActivity"
        android:label="@string/app_name" 
        android:screenOrientation="portrait">
     </activity>

     <activity
        android:name="com.example.eventnotifier.UnregisteredGuestsActivity"
        android:label="@string/app_name" 
        android:screenOrientation="portrait">
     </activity>

     <activity
        android:name="com.example.eventnotifier.RecentGuestsActivity"
        android:label="@string/app_name" 
        android:screenOrientation="portrait">

     </activity>
 </application>  
</manifest>

这行是没有得到印-Log.i（ * * IN_IF_REGID *的 * 的*，REGID）;你们能帮助我吗？
我必须提交该项目的明天。任何帮助将AP preciated！
谢谢

This line is not getting printed -Log.i("**IN_IF_REGID***", regId); Can you guys help me out? I have to submit this project tomorrow. Any help will be appreciated! Thank you

推荐答案

它不工作，这样的。

GCMRegistrar.register 启动对GCM服务器发出请求，要求它为一个注册ID。这是一个非同步请求。 GCMRegistrar.getRegistrationId 返回注册ID的缓存值，因此，如果您的设备没有被注册，则返回null。

GCMRegistrar.register initiates a request to GCM server, asking it for a Registration ID. This is an asynch request. GCMRegistrar.getRegistrationId returns a cached value of the Registration ID, so if your device is not registered, it returns null.

的注册ID在 GCMIntentService.onRegistered 方法返回。

The Registration ID is returned in the GCMIntentService.onRegistered method.

下面是<一的code href=\"http://$c$c.google.com/p/gcm/source/browse/samples/gcm-demo-client/src/com/google/android/gcm/demo/app/GCMIntentService.java?r=b2b02f2050692449d7217f4ce7e146e4cd344490\"相对=nofollow> GCMIntentService 从GCM演示。

这是的code GCMRegistrar.getRegistrationId ：

/**
 * Gets the current registration id for application on GCM service.
 * <p>
 * If result is empty, the registration has failed.
 *
 * @return registration id, or empty string if the registration is not
 *         complete.
 */
public static String getRegistrationId(Context context) {
    final SharedPreferences prefs = getGCMPreferences(context);
    String registrationId = prefs.getString(PROPERTY_REG_ID, "");
    // check if app was updated; if so, it must clear registration id to
    // avoid a race condition if GCM sends a message
    int oldVersion = prefs.getInt(PROPERTY_APP_VERSION, Integer.MIN_VALUE);
    int newVersion = getAppVersion(context);
    if (oldVersion != Integer.MIN_VALUE && oldVersion != newVersion) {
        Log.v(TAG, "App version changed from " + oldVersion + " to " +
                newVersion + "; resetting registration id");
        clearRegistrationId(context);
        registrationId = "";
    }
    return registrationId;
}

正如你所看到的，它返回的注册ID的本地存储的值。为了使它返回任何东西， GCMRegistrar.setRegistrationId（上下文的背景下，字符串REGID）必须调用，与已返回 GCMIntentService注册ID 。
而这就是所谓的在 GCMBaseIntentService ：

As you can see, it returns a locally stored value of the Registration ID. In order for it to return anything, GCMRegistrar.setRegistrationId(Context context, String regId) must be called, with the Registration ID that was returned to GCMIntentService. And it's called in GCMBaseIntentService :

    private void handleRegistration(final Context context, Intent intent) {
        GCMRegistrar.cancelAppPendingIntent();
        String registrationId = intent.getStringExtra(EXTRA_REGISTRATION_ID);
        String error = intent.getStringExtra(EXTRA_ERROR);
        String unregistered = intent.getStringExtra(EXTRA_UNREGISTERED);
        Log.d(TAG, "handleRegistration: registrationId = " + registrationId +
                ", error = " + error + ", unregistered = " + unregistered);

        // registration succeeded
        if (registrationId != null) {
            GCMRegistrar.resetBackoff(context);
            GCMRegistrar.setRegistrationId(context, registrationId);
            onRegistered(context, registrationId);
            return;
        }
    ...
    }

这篇关于GCM注册ID为空的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！