即使应用已关闭（slide/swiped 离开）也会收到 GCM 通知

Question

这是在我的 MainActivity 中用作 BroadcastReceiver 的代码

    mRegistrationBroadcastReceiver = new BroadcastReceiver() {

        //When the broadcast received
        //We are sending the broadcast from GCMRegistrationIntentService

        @Override
        public void onReceive(Context context, Intent intent) {
            //If the broadcast has received with success
            //that means device is registered successfully
            if(intent.getAction().equals(GCMRegistrationIntentService.REGISTRATION_SUCCESS)){
                //Getting the registration token from the intent
                String token = intent.getStringExtra("token");
                //Displaying the token as toast
                Toast.makeText(getApplicationContext(), "Registration token:" + token, Toast.LENGTH_LONG).show();

                //if the intent is not with success then displaying error messages
            } else if(intent.getAction().equals(GCMRegistrationIntentService.REGISTRATION_ERROR)){
                Toast.makeText(getApplicationContext(), "GCM registration error!", Toast.LENGTH_LONG).show();
            } else {
                Toast.makeText(getApplicationContext(), "Error occurred", Toast.LENGTH_LONG).show();
            }
        }
    };

我遵循了有关 GCM 的教程

https://www.simplifiedcoding.net/android-push-notification-using-gcm-tutorial/

Answer 1

通过滑动关闭应用程序（通常称为 滑动它）并不会完全终止应用程序。查看 Android 爱好者社区中的 answer 以获得更详细的描述。你可以看到那里提到：

..It won't directly causes services to stop..

由于 GCM 通知的侦听器为 Service，这实际上意味着您的应用仍有可能继续接收它们，无论它是否为 一扫.

虽然滑动应用程序的结果也可能会有所不同取决于设备它是运行，但可以kill/force停止它或其他方式上面提到的，将停止后台进程。

但是，如果结果是，应用程序 killed/force 已停止，如上面 link 的回答中所述：

For stop is a complete kill of the app -- all processes are killed, all services stopped, all notifications removed, all alarms removed, etc.

这将导致该应用根本不会收到任何类型的通知，因为它是为 Android 自版本 3.1 设计的，如此 answer 中所述：

Apps that are in the stopped state do not receive broadcast Intents.

Stopped state is:

when the app is initially installed (before the user runs something in the app) or after a Force Stop. You can find more about this here: http://developer.android.com/about/versions/android-3.1.html#launchcontrols

希望这有助于以某种方式清除一些东西。干杯! :D

Answer 2

你可以试试 GcmListenerService 当您通过滑动关闭您的应用程序时，该服务仍在后台激活，您可以收到推送通知。除非用户手动强制停止应用程序设置，否则此服务可以帮助您。