更新时间:2022-12-27 10:56:08
FCM(Firebase Cloud Messaging)中有两种类型的消息:
onMessageReceived()
回调注意: Firebase 团队尚未开发用于发送 data-messages
的 UI你的设备,但是.您应该使用您的服务器发送此类型!
为此,您必须向以下 URL 执行 POST
请求:
POST
https://fcm.googleapis.com/fcm/send
Content-Type
,值: application/json
授权
,值: key=<your-server-key>
{"to": "/topics/my_topic",数据": {"my_custom_key": "my_custom_value",my_custom_key2":真}}
{数据": {"my_custom_key": "my_custom_value",my_custom_key2":真},"registration_ids": ["{device-token}","{device2-token}","{device3-token}"]}
注意:确保您不添加 JSON 密钥通知
注意:要获取您的服务器密钥,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
这是您处理收到的消息的方式:
@Override公共无效 onMessageReceived(RemoteMessage remoteMessage) {映射<字符串,字符串>数据 = remoteMessage.getData();字符串 myCustomKey = data.get("my_custom_key");//管理数据}
Here is my manifest:
<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>
When the app is in the background and a notification arrives, then the default notification comes and doesn't run my code of onMessageReceived
.
Here is my onMessageReceived
code. This is invoked if my app is running on the foreground, not when it is running in the background. How can I run this code when the app is in background too?
// [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]
There are two types of messages in FCM (Firebase Cloud Messaging):
onMessageReceived()
callback only when your app is in foreground
onMessageReceived()
callback even if your app is in foreground/background/killed
NOTE: Firebase team have not developed a UI to send
data-messages
to your devices, yet. You should use your server for sending this type!
To achieve this, you have to perform a POST
request to the following URL:
Content-Type
, Value: application/json
Authorization
, Value: key=<your-server-key>
{
"to": "/topics/my_topic",
"data": {
"my_custom_key": "my_custom_value",
"my_custom_key2": true
}
}
{
"data": {
"my_custom_key": "my_custom_value",
"my_custom_key2": true
},
"registration_ids": ["{device-token}","{device2-token}","{device3-token}"]
}
NOTE: Be sure you're not adding JSON key
notification
NOTE: To get your server key, you can find it in the firebase console:Your project -> settings -> Project settings -> Cloud messaging -> Server Key
This is how you handle the received message:
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
Map<String, String> data = remoteMessage.getData();
String myCustomKey = data.get("my_custom_key");
// Manage data
}