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]
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>
要使firebase库在以下情况下调用onmessagerecreceived ()
应用程序在前台
后台应用程序
应用程序已被杀死
你不能把JSON键通知在你的请求到Firebase API，而是使用数据，见下文。
当你的应用程序处于后台或被杀死时，下面的消息将不会调用你的onmessagerreceived()，并且你不能自定义你的通知。
{
"to": "/topics/journal",
"notification": {
"title" : "title",
"text": "data!",
"icon": "ic_notification"
}
}
但是用这个方法就可以了
{
"to": "/topics/dev_journal",
"data": {
"text":"text",
"title":"",
"line1":"Journal",
"line2":"刊物"
}
}
基本上，消息是在参数RemoteMessage中与数据对象一起发送的，如Map<String, String>，然后您可以在这里的代码片段中管理onmessagerreceived中的通知
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
Map<String, String> data = remoteMessage.getData();
//you can get your text message here.
String text= data.get("text");
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
// optional, this is to make beautiful icon
.setLargeIcon(BitmapFactory.decodeResource(
getResources(), R.mipmap.ic_launcher))
.setSmallIcon(smallIcon) //mandatory
.......
/*You can read more on notification here:
https://developer.android.com/training/notify-user/build-notification.html
https://www.youtube.com/watch?v=-iog_fmm6mE
*/
}
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。
在一般情况下
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
数据电文示例:
{
"to": "/path",
"data":
{
"my_custom_key": "my_custom_value",
"my_custom_key2": true
}
}
显示消息示例:
{
"notification": {
"title" : "title",
"body" : "body text",
"icon" : "ic_notification",
"click_action" : "OPEN_ACTIVITY_1"
}
}
Android端可以处理如下通知:
public class MyFirebaseMessagingService extends FirebaseMessagingService {
…
@Override public void onMessageReceived(RemoteMessage remoteMessage){
Map<String, String> data = remoteMessage.getData();
String myCustomKey = data.get("my_custom_key");
}
…
}
更多关于FCM的详细信息可以在这里找到:在Android上设置一个Firebase云消息客户端应用程序
发送消息的简单方法，即使应用程序是在后台和前台如下:-
要使用API发送消息，您可以使用一个名为AdvancedREST客户端工具，它是一个chrome扩展，并发送带有以下参数的消息。
Rest客户端工具链接:https://chrome.google.com/webstore/detail/advanced-rest-client/hgmloofddffdnphfgcellkdfbfbjeloo
使用这个url:- https://fcm.googleapis.com/fcm/send
内容类型:application / json
授权:key=您的服务器密钥或授权密钥(参见下面的参考)
{ "data": {
"image": "https://static.pexels.com/photos/4825/red-love-romantic-flowers.jpg",
"message": "Firebase Push Message Using API"
"AnotherActivity": "True"
},
"to" : "device id Or Device token"
}
授权密钥可以通过访问谷歌开发人员控制台，并单击项目左侧菜单上的凭证按钮来获得。在列出的API密钥中，服务器密钥将是您的授权密钥。
并且您需要将接收者的tokenID放在使用API发送的POST请求的“to”部分。
