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]
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")){
}
从服务器请求中完全删除通知有效负载。只发送数据并在onmessagerreceived()中处理它，否则当应用程序在后台或被杀死时，你的onmessagerreceived将不会被触发。
这是我从服务器发送的:
{
"data":{
"id": 1,
"missedRequests": 5
"addAnyDataHere": 123
},
"to": "fhiT7evmZk8:APA91bFJq7Tkly4BtLRXdYvqHno2vHCRkzpJT8QZy0TlIGs......"
}
你可以像这样在onMessageReceived(RemoteMessage message)中接收你的数据(假设我需要获取id)
Object obj = message.getData().get("id");
if (obj != null) {
int id = Integer.valueOf(obj.toString());
}
类似地，你可以在onmessagerecreceived()内从服务器获得任何数据。
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>
2023年1月
对于那些实现了最新的Firebase云消息(FCM)的应用程序，您可能不会被限制在后台或完全关闭的情况下分别为应用程序发送数据和通知以处理数据。正如这里的一些回答所解释的那样，简短的版本是:
在你的启动器活动上，监视启动时的额外内容;
测试您的FCM数据中的唯一键是否在列表中;
如果存在，获取必要的数据并调用您的活动来处理您想要做的处理。
//Firebase
// [START handle_data_extras]
if (getIntent().getExtras() != null) {
boolean fcmExtraFlag = false;
for (String key : getIntent().getExtras().keySet()) {
Object value = getIntent().getExtras().get(key);
Log.d(TAG, "Key: " + key + " Value: " + value);
if(key.equalsIgnoreCase("tracerId")){
//test your known key to be sure it is from fcm
//this must have come from notification (system) tray
//this will come whether the app was in the background or completely off
//generally, this could be in the main activity as it has the intent-filter already set
fcmExtraFlag = true;
}
}
//pick fcm values if present and notify and/or process accordingly
//you may add time-lookup to ignore delayed (time-passed) ones; and ignore
if(fcmExtraFlag){
String tracerId = (String) getIntent().getExtras().get("tracerId");
//prepare your data as needed
String tracerData = tracerId+">"+data-one+">"+data-two;
String msgBody = "This is a test notification; data received: "+tracerId;
String fcmMessage = msgBody;
//start your confirmation activity, directly or whichever way
SidUtils.firebaseStartConfirms(msgBody, tracerData, this);
}
}
// [END handle_data_extras]
如前所述，如果可能的话，这应该在你的主活动中，以处理你的应用程序实际上关闭的情况-而不仅仅是在后台。这些将通过点击系统托盘上的应用程序通知来触发。
根据OAUTH 2.0:
由于FCM现在使用OAUTH 2，在这种情况下将会有认证问题
所以我阅读了firebase文档，并根据文档发布数据消息的新方法是;
POST: https://fcm.googleapis.com/v1/projects/YOUR_FIREBASEDB_ID/messages:send
头
Key: Content-Type, Value: application/json
Auth
Bearer YOUR_TOKEN
例子的身体
{
"message":{
"topic" : "xxx",
"data" : {
"body" : "This is a Firebase Cloud Messaging Topic Message!",
"title" : "FCM Message"
}
}
}
在url中有数据库Id，你可以在你的firebase控制台上找到它。(Go项目设置)
现在让我们用我们的代币(它只有效1小时):
首先在Firebase控制台中，打开设置>服务帐户。单击“生成新的私钥”，安全存储包含该私钥的JSON文件。我需要这个JSON文件来手动授权服务器请求。我下载了。
然后我创建了一个node.js项目，并使用这个函数来获得我的令牌;
var PROJECT_ID = 'YOUR_PROJECT_ID';
var HOST = 'fcm.googleapis.com';
var PATH = '/v1/projects/' + PROJECT_ID + '/messages:send';
var MESSAGING_SCOPE = 'https://www.googleapis.com/auth/firebase.messaging';
var SCOPES = [MESSAGING_SCOPE];
router.get('/', function(req, res, next) {
res.render('index', { title: 'Express' });
getAccessToken().then(function(accessToken) {
console.log("TOKEN: "+accessToken)
})
});
function getAccessToken() {
return new Promise(function(resolve, reject) {
var key = require('./YOUR_DOWNLOADED_JSON_FILE.json');
var jwtClient = new google.auth.JWT(
key.client_email,
null,
key.private_key,
SCOPES,
null
);
jwtClient.authorize(function(err, tokens) {
if (err) {
reject(err);
return;
}
resolve(tokens.access_token);
});
});
}
现在我可以在我的post请求中使用这个令牌。然后我发布我的数据消息，它现在由我的应用程序onmessagerecreceived函数处理。
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
