互联网开启时未收到Android推送通知

1）我已经实现了推送通知。当设备连接到Internet时，它可以正常工作。（例如）从服务器端接收通知

2）设备未连接到Internet时。如果服务器发送推送消息。然后将设备连接到Internet ..它没有收到推送消息..这就是问题所在

3）当设备连接到互联网时，它喜欢实现类似Whats App ..这样的推送消息。它应该接收到推送消息。

public class GcmIntentService extends GcmListenerService {



    @Override
    public void onMessageReceived(String from, Bundle data) {
        String message = data.getString("title");
        String post_id=data.getString("id");
        boolean pushactive= SharedPreference.getInstance().getBool(this,"pushactive");
        if(pushactive)
        generateNotification(message,post_id);

    }

    @Override
    public void onCreate() {
        super.onCreate();
        System.out.println("inside GcmListenerService");
    }

    public void generateNotification(String message,String post_id)
    {
        Random random = new Random();
        int m = random.nextInt(9999 - 1000) + 1000;
        Intent intent = new Intent(this, NewsDetailActivity.class);
        intent.putExtra("isPush", true);
        intent.putExtra("post_id",post_id);
        intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.ic_launcher)
                .setContentText(message)
                .setContentTitle("EGToday")
                .setAutoCancel(true)
                .setContentIntent(PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT));

        notificationManager.notify(m, mBuilder.build());
    }
}

如何做到这一点？

这是我的意图服务课程。

这是我的表现

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

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.CAMERA"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <permission android:name="com.egt.permission.C2D_MESSAGE"
        android:protectionLevel="signature" />
    <uses-permission android:name="com.egt.permission.C2D_MESSAGE" />
    <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />





    <application
        android:name="com.egt.Constants.NetworkCall"
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">


        <activity android:name=".View.SplashPage">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:windowSoftInputMode="stateHidden|adjustPan"
            android:name=".View.MainActivity"
            android:screenOrientation="portrait">

        </activity>
        <activity

            android:name=".View.NewsDetailActivity"
            android:screenOrientation="portrait">

        </activity>
        <activity

            android:name=".View.SearchActivity"
            android:screenOrientation="portrait">

        </activity>

        <receiver
            android:name="com.google.android.gms.gcm.GcmReceiver" android:exported="true"
            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.egt" />
            </intent-filter>
        </receiver>
        <service
            android:name="com.egt.PushNotification.GcmIntentService"
            android:exported="false" >
            <intent-filter>
                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
            </intent-filter>
        </service>

        <service android:name="com.egt.PushNotification.GcmRegistration"
            android:exported="false" />


    </application>

</manifest>