应用关闭时推送通知 [英] Push Notifications when app is closed

问题描述

您知道在应用程序完全关闭时是否可以从Google云消息接收通知?

Do you know if is it possible to receive notifications from google cloud message when the application is fully closed?

我知道它是打开还是在后台，但是可以通过任何方式对其进行编程以接收它们吗?

I know if it's open or in background yes, but can it be programmed any way in order to receive them?

我关闭了应用程序，但没有收到通知.

I continue without receiving notifications when the app is closed.

我附上了代码，以防万一我看不到它.

I attached the code in case I have an error and I am not watching it.

清单

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

<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="com.frab.permission.C2D_MESSAGE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.VIBRATE" />
<permission
android:name="com.frab.permission.C2D_MESSAGE"
android:protectionLevel="signature" />

<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.frab.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

<receiver
android:name=".GGMBroadcastReceiver"
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.something" />
</intent-filter>
</receiver>

<service android:name=".GCMIntentService" />
</application>

</manifest>

广播接收器

package com.something;

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.NotificationCompat;
import android.util.Log;

import com.activities.SignIn;
import com.google.android.gcm.GCMBaseIntentService;
import com.objects.Globals;

public class GCMIntentService extends GCMBaseIntentService {
private static final String TAG = "GGM <-----> FRAB";
private Bundle extras;

public GCMIntentService() {
super(Globals.SENDER_ID);
}

@Override
public void onDestroy() {
Log.d(TAG, "terminando servicio");
}

@Override
protected void onRegistered(Context context, String registrationId) {
Log.i(TAG, "onRegistered: registrationId=" + registrationId);
}

@Override
protected void onUnregistered(Context context, String registrationId) {
Log.i(TAG, "onUnregistered: registrationId = " + registrationId);
}
@Override
protected void onMessage(Context context, Intent data) {
extras = data.getExtras();
String message = extras.getString("msg");
Log.d("******", message);
sendNotification(message);
}

@Override
protected void onError(Context arg0, String errorId) {
Log.e(TAG, "onError: errorId = " + errorId);
}    
}

package com.something;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.support.v4.content.WakefulBroadcastReceiver;

public class GGMBroadcastReceiver extends WakefulBroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
// Explicitly specify that GcmIntentService will handle the intent.
ComponentName comp = new ComponentName(context.getPackageName(), GCMIntentService.class.getName());
// Start the service, keeping the device awake while it is launching.
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}

打开应用程序时:确定

当应用在后台运行时:确定

When the app is in background : Ok

当用户强行关闭应用程序时:通知未到达

When the app is closed forcefully by the user : notifications don't arrive

出什么问题了?

非常感谢您.

推荐答案

是的，有可能在应用程序完全关闭时从Google云消息接收通知".

Yes, it is possible 'to receive notifications from google cloud message when the application is fully closed'.

事实上，广播接收器是GCM用于传递消息的机制. 您需要实现 BroadcastReceiver 并在AndroidManifest.xml中声明

Infact, A broadcast receiver is the mechanism GCM uses to deliver messages. You need to have implement a BroadcastReceiver and declare it in the AndroidManifest.xml.

请参考以下代码段.

AndroidManifest.xml

<receiver
    android:name=".GcmBroadcastReceiver"
    android:permission="com.google.android.c2dm.permission.SEND" >
    <intent-filter>
        <!-- Receives the actual messages. -->
        <action android:name="com.google.android.c2dm.intent.RECEIVE" />
        <category android:name="com.google.android.gcm.demo.app" />
    </intent-filter>
</receiver>
<service android:name=".GcmIntentService" />

Java代码

public class GcmBroadcastReceiver extends WakefulBroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // Explicitly specify that GcmIntentService will handle the intent.
        ComponentName comp = new ComponentName(context.getPackageName(),
                GcmIntentService.class.getName());
        // Start the service, keeping the device awake while it is launching.
        startWakefulService(context, (intent.setComponent(comp)));
        setResultCode(Activity.RESULT_OK);
    }
}

当GCM向您的设备发送消息时，BroadcastReceiver将接收到该消息并调用onReceive()函数，您可以在其中启动服务以实际为您执行预期的任务.

When GCM delivers a message to your device, BroadcastReceiver will receive the message and call the onReceive() function, wherein you may start a service to actually perform the intended task for you.

上面的代码示例使用称为WakefulBroadcastReceiver的专用BroadcastReceiver，它可以确保设备在服务正常工作时不会进入睡眠状态.

The above Code example uses a specialized BroadcastReceiver called WakefulBroadcastReceiver, which makes sure that the device doesn't go to sleep, while the service is doing its work.

请参阅相同的Android官方页面: https://developer.android. com/google/gcm/client.html

Refer to the Official Android Page for the same: https://developer.android.com/google/gcm/client.html

这篇关于应用关闭时推送通知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！