这是我的舱单:
<service android:name=".fcm.PshycoFirebaseMessagingServices">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>
<service android:name=".fcm.PshycoFirebaseInstanceIDService">
<intent-filter>
<action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
</intent-filter>
</service>
当应用程序在后台和通知到达，然后默认通知来，不运行我的onmessagerreceived代码。
这是我的onMessageReceived代码。如果我的应用程序在前台运行，而不是在后台运行，就会调用这个函数。我怎么能运行这段代码时，应用程序是在后台太?
// [START receive_message]
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
// TODO(developer): Handle FCM messages here.
// If the application is in the foreground handle both data and notification messages here.
// Also if you intend on generating your own notifications as a result of a received FCM
// message, here is where that should be initiated. See sendNotification method below.
data = remoteMessage.getData();
String title = remoteMessage.getNotification().getTitle();
String message = remoteMessage.getNotification().getBody();
String imageUrl = (String) data.get("image");
String action = (String) data.get("action");
Log.i(TAG, "onMessageReceived: title : "+title);
Log.i(TAG, "onMessageReceived: message : "+message);
Log.i(TAG, "onMessageReceived: imageUrl : "+imageUrl);
Log.i(TAG, "onMessageReceived: action : "+action);
if (imageUrl == null) {
sendNotification(title,message,action);
} else {
new BigPictureNotification(this,title,message,imageUrl,action);
}
}
// [END receive_message]
因为从Firebase通知UI发送的显示消息只在应用程序处于前台时有效。对于数据消息，需要对FCM进行POST调用
步骤
安装高级休息客户端谷歌Chrome扩展
添加以下头文件
关键字:Content-Type，值:application/json
密钥:授权，值:Key ="您的服务器密钥"
添加正文
如果使用主题:
｛
"to": "/topics/topic_name"，
"数据":{
"key1": "value1"，
"key2": "value2"，
｝
｝
如果使用注册id:
｛
"registration_ids": "[{"id"}，{id1}]"，
"数据":{
"key1": "value1"，
"key2": "value2"，
｝
｝
它!。现在像往常一样收听onmessagerreceived回调。
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
Map<String, String> data = remoteMessage.getData();
String value1 = data.get("key1");
String value2 = data.get("key2");
}
1. 为什么会这样?
FCM (Firebase Cloud Messaging)中有两种类型的消息:
显示消息:这些消息仅在应用程序处于前台时触发onmessagerreceived()回调
数据消息:这些消息触发onmessagerreceived()回调，即使你的应用程序在前台/后台/被杀死
注意:Firebase团队还没有开发用于发送数据消息的UI
还有你的设备。您应该使用您的服务器发送这种类型!
2. 如何?
为了实现这一点，你必须对以下URL执行POST请求:
文章https://fcm.googleapis.com/fcm/send
头
关键字:Content-Type，值:application/json
Key: Authorization, Value: Key =<your-server-key>
主体使用主题
{
"to": "/topics/my_topic",
"data": {
"my_custom_key": "my_custom_value",
"my_custom_key2": true
}
}
或者如果你想把它发送到特定的设备
{
"data": {
"my_custom_key": "my_custom_value",
"my_custom_key2": true
},
"registration_ids": ["{device-token}","{device2-token}","{device3-token}"]
}
注意:请确保您没有添加JSON键通知
注意:要获得服务器密钥，您可以在firebase控制台中找到它:您的项目->设置->项目设置->云消息传递->服务器密钥
3.如何处理推送通知消息?
这是你如何处理收到的消息:
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
Map<String, String> data = remoteMessage.getData();
String myCustomKey = data.get("my_custom_key");
// Manage data
}
此情况仅用于firebase管理通知
如果应用程序在后台，则不会触发FirebaseMessagingService
要处理这种情况，请转到launcher activity，检查附加的intent bundle，并使用以下代码打印出所有数据:
intent?.extras?.let {it->
for (key in bundle.keySet()) {
val value = bundle[key]
Log.d("NotificationData", String.format("%s %s (%s)", key, value.toString(), value!!.javaClass.name))
}
}
显示所有数据类型的签入日志;
例子:
我想从通知中获得周和标题将使用这段代码
intent?.extras?.let {it->
if (it.containsKey("week")){
}
if (it.containsKey("title")){
}
下面是关于firebase消息的更清晰的概念。我从他们的支援组找到的。
Firebase有三种消息类型:
通知消息:通知消息工作在后台或前台。当app在后台时，通知消息被传递到系统托盘。如果应用程序在前台，消息由onmessagerreceived()或didReceiveRemoteNotification回调处理。这些实质上就是所谓的显示消息。
数据消息:在Android平台上，数据消息可以工作在后台和前台。数据消息将由onMessageReceived()处理。在Android上，数据有效载荷可以在用于启动你的活动的Intent中检索。具体来说，如果你有"click_action":"launch_Activity_1"，你只能通过getIntent()从Activity_1中检索这个意图。
Messages with both notification and data payloads: When in the background, apps receive the notification payload in the notification tray, and only handle the data payload when the user taps on the notification. When in the foreground, your app receives a message object with both payloads available. Secondly, the click_action parameter is often used in notification payload and not in data payload. If used inside data payload, this parameter would be treated as custom key-value pair and therefore you would need to implement custom logic for it to work as intended.
另外，我建议您使用onMessageReceived方法(参见数据消息)来提取数据包。根据您的逻辑，我检查了bundle对象，并没有发现预期的数据内容。这里有一个类似案例的参考，可能会更清楚。
欲了解更多信息，请访问我的这个线程
要在后台捕获消息，您需要使用BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.util.Log
import androidx.legacy.content.WakefulBroadcastReceiver
import com.google.firebase.messaging.RemoteMessage
class FirebaseBroadcastReceiver : WakefulBroadcastReceiver() {
val TAG: String = FirebaseBroadcastReceiver::class.java.simpleName
override fun onReceive(context: Context, intent: Intent) {
val dataBundle = intent.extras
if (dataBundle != null)
for (key in dataBundle.keySet()) {
Log.d(TAG, "dataBundle: " + key + " : " + dataBundle.get(key))
}
val remoteMessage = RemoteMessage(dataBundle)
}
}
把这个加到你的舱单上
<receiver
android:name="MY_PACKAGE_NAME.FirebaseBroadcastReceiver"
android:exported="true"
android:permission="com.google.android.c2dm.permission.SEND">
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
</intent-filter>
</receiver>
