禁用仅在后台接收的通知

Question

我使用 Firebase 云消息传递和 Firebase 函数构建了一个聊天应用程序。但是我目前有两个问题。 1.当应用程序处于打开状态并且有新消息进入时，该应用程序将自动移动到应用程序的主要活动。 2.其次，我希望仅在后台接收通知。

我如何实现这一点？

下面是我的留言收到

public class MyFirebaseMessagingService extends FirebaseMessagingService {
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
// Check if message contains a data payload.
if (remoteMessage.getData().size() > 0) {
showNotification(remoteMessage.getData().get("name"), (remoteMessage.getData().get("click_action")), remoteMessage.getData().get("title"));
}
// Check if message contains a notification payload.
if (remoteMessage.getNotification() != null) {
}
}
private void showNotification(String name, String click_action, String title) {
Intent intent;
if (click_action.equals("Download")) {
intent = new Intent(this, Download.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
} else if (click_action.equals("Student_SystemsDevt")) {
intent = new Intent(this, Student_SystemsDevt.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
}
else {
intent = new Intent(this, LoginActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
}
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent, PendingIntent.FLAG_UPDATE_CURRENT);
Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
.setContentTitle(title)
.setSmallIcon(R.mipmap.ic_launcher)
.setContentText(name)
.setAutoCancel(true)
.setStyle(new NotificationCompat.BigTextStyle())
.setSound(defaultSoundUri)
.setContentIntent(pendingIntent);
NotificationManager notificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());
}
}

我的清单文件

<application
android:name=".GTUCONLINE"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".LoginActivity"
android:screenOrientation="portrait"
android:theme="@style/MyTheme" />
<activity android:name=".MainActivity">
</activity>
<activity
android:name=".ChoiceActivity"
android:screenOrientation="portrait"
android:theme="@style/MyTheme" />
<activity
android:name=".WelcomeActivity"
android:screenOrientation="portrait"
android:theme="@style/MyTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.theartofdev.edmodo.cropper.CropImageActivity"
android:theme="@style/Base.Theme.AppCompat" />
<activity
android:name=".StudentSignUp"
android:screenOrientation="portrait"
android:theme="@style/MyTheme" />
<activity
android:name=".LecturerSignUp"
android:screenOrientation="portrait" />
<activity android:name=".ProgrammeActivity" />
<service android:name=".MyFirebaseInstanceIDService">
<intent-filter>
<action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
</intent-filter>
</service>
<service android:name=".MyFirebaseMessagingService">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>
<activity
android:name=".TopicActivity"
android:theme="@style/MyTheme" />
<activity android:name=".MIS" />
<activity android:name=".GB" />
<activity android:name=".FIN" />
<activity android:name=".ENGINEERINGM" />
<activity android:name=".BDM" />
<activity android:name=".SCM" />
<activity android:name=".TE" />
<activity android:name=".TM" />
<activity android:name=".BET" />
<activity android:name=".ICT" />
<activity android:name=".T" />
<activity android:name=".IT" />
<activity android:name=".AM" />
<activity android:name=".OGM" />
<activity android:name=".I" />
<activity android:name=".PEF" />
<activity android:name=".QM" />
<activity android:name=".EPM" />
<activity android:name=".PM" />
<activity android:name=".HM" />
<activity android:name=".StudentsList">
<intent-filter>
<action android:name="StudentsList" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity android:name=".LecturersList" />
<activity android:name=".AdminActivity" />
<activity
android:name=".ChatActivity"
android:parentActivityName=".StudentsList" />
<activity android:name=".LecturerMainActivity" />
<activity
android:name=".Download"
android:parentActivityName=".MIS">
<intent-filter>
<action android:name="Download" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".MIS_Information"
android:parentActivityName=".MIS" />
<activity android:name=".Terms" />
<activity
android:name=".Admin_Login"
android:parentActivityName=".LoginActivity" />
<activity
android:name=".Manipulation"
android:parentActivityName=".Admin_Login" />
<activity android:name=".Admins" />
<activity
android:name=".SystemsDevt"
android:parentActivityName=".MIS" />
<activity
android:name=".SysGroupChat"
android:parentActivityName=".SystemsDevt" />
<activity
android:name=".EntSystems"
android:parentActivityName=".MIS" />
<activity android:name=".DownloadEnt">
<intent-filter>
<action android:name="DownloadEnt" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity android:name=".student_mis" />
<activity
android:name=".Student_SystemsDevt"
android:parentActivityName=".student_mis">
<intent-filter>
<action android:name="Student_SystemsDevt" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".Student_EntSys"
android:parentActivityName=".student_mis" />
<activity
android:name=".SystemsDevt_Add"
android:parentActivityName=".SystemsDevt" />
<activity android:name=".EntSystemsAdd" />
<activity android:name=".EntSystemsInfo" />
<activity
android:name=".DatabaseSystems"
android:parentActivityName=".MIS" />
<activity android:name=".DownloadDatabaseSys" />
<activity
android:name=".Student_DatabaseSystems"
android:parentActivityName=".student_mis" />
<activity android:name=".DatabaseInfo" />
<activity
android:name=".DatabaseAdd"
android:parentActivityName=".DatabaseSystems" />
<activity
android:name=".IntroToOil"
android:parentActivityName=".GB" />
<activity
android:name=".DownloadIntro"
android:parentActivityName=".IntroToOil" />
<activity
android:name=".IntroToOilInfo"
android:parentActivityName=".IntroToOil" />
<activity
android:name=".IntroToOilAdd"
android:parentActivityName=".IntroToOil" />
<activity android:name=".student_gb" />
<activity android:name=".StudentIntro" />
<activity android:name=".MIS_students_new"
android:parentActivityName=".SystemsDevt">
</activity>
</application>

Answer 1

1- 实际上，仅当应用程序处于前台时，才会触发 onMessageReceived，如前所述，在此处输入链接说明。因此，如果您不覆盖 onMessageReceived，则当您的应用程序处于前台时，您将不会收到推送

2-根据fcm文档，当您的应用程序在后台运行时，不会触发onMessageReceived，但

数据有效负载在启动器活动的意图附加内容中提供。

它解释了为什么您的推送重定向到您的主要活动(您的启动器(。

到目前为止，您可以处理来自意图的重定向。

您还可以指定重定向的活动，例如在此处输入链接描述：

{
"to":"some_device_token",
"content_available": true,
"notification": {
"title": "hello",
"body": "test message",
"click_action": "OPEN_ACTIVITY_1"
},
"data": {
"extra":"juice"
}
}

不要忘记所需活动的意图过滤器：

<intent-filter>
<action android:name="OPEN_ACTIVITY_1" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>

Answer 2

同时在清单中添加"任务"权限。

private boolean isAppForeground() {
ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses();
if (appProcesses == null) {
return false;
}
final String packageName = getPackageName();
for (ActivityManager.RunningAppProcessInfo appProcess : appProcesses) {
if (appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND && appProcess.processName.equals(packageName)) {
return true;
}
}
return false;
} 
if(isAppForeground()){
// Handle notification silently without displaying in notification tray
}else{
// Do your regular stuff
// Check if message contains a data payload.
if (remoteMessage.getData().size() > 0) {
showNotification(remoteMessage.getData().get("name"), (remoteMessage.getData().get("click_action")), remoteMessage.getData().get("title"));
}
// Check if message contains a notification payload.
if (remoteMessage.getNotification() != null) {
}
}