android - 即使应用程序关闭(滑动/滑动)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(通常称为滑动)并不会完全终止应用。看看这个 answer在 Android Enthusiasts community 中有更详细的描述。你可以看到那里提到:

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

由于 GCM 通知的监听器是服务，这实际上意味着您的应用仍有可能继续接收它们，无论它是否被刷掉。

虽然滑动应用程序的结果也可能取决于设备它正在运行，但可能会终止/强制停止它或如上所述，将停止后台进程。

但是，如果结果是应用程序被终止/强制停止，如上面链接的答案中所述:

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 3.1 版设计的，如本 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) orafter 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