我已经在应用程序中实现了 FCM。其他 firebase 功能运行良好,即上传到 firebase 存储和 firebase 实时消息传递。但是当我第一次向设备发送推送通知时,它显示已成功发送通知,但未调用消息接收。然后当我发送另一个推送通知时,它立即显示未注册。然后它总是没有注册。
public class MyFirebaseMessagingService extends FirebaseMessagingService {
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
Log.d("myLog", "From: " + remoteMessage.getFrom());
Log.d("myLog", "Notification Message Body: " + remoteMessage.getNotification().getBody());
}
}
应用程序.gradle:
apply plugin: 'com.google.gms.google-services'
项目.gralde:
classpath 'com.google.gms:google-services:3.1.0'
list :
<service android:name=".MyFirebaseMessagingService">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>
设备 token 已正确刷新,每当我清除数据并重新打开应用程序时,它会立即打印新的设备 token 。
最佳答案
onMessageReceived(RemoteMessage remoteMessage) 方法根据以下情况调用。
- FCM 响应 带有通知 和数据 block :
{ "to": "设备 token 列表", “通知”:{ "body": "你的通知正文", "title": "您的通知标题" }, “数据”:{ "body": "你的数据通知正文", "title": "标题中通知的标题", "key_1": "key_1 的值", "image_url": "www.abc.com/xyz.jpeg", “key_2”:“key_2 的值” }
- 前台应用:
onMessageReceived(RemoteMessage remoteMessage) 调用,在通知栏中显示 LargeIcon 和 BigPicture。我们可以从通知和数据 block 中读取内容
- 后台应用:
onMessageReceived(RemoteMessage remoteMessage) 未调用,系统托盘将接收消息并从 notification block 中读取正文和标题,并在通知栏中显示默认消息和标题。
- FCM 响应只有数据 block :
在这种情况下,从 json 中删除 notofocation block
{ "to": "设备 token 列表", “数据”:{ "body": "你的数据通知正文", "title": "标题中通知的标题", "key_1": "key_1 的值", "image_url": "www.abc.com/xyz.jpeg", “key_2”:“key_2 的值” }
- 前台应用:
onMessageReceived(RemoteMessage remoteMessage) 调用,在通知栏中显示 LargeIcon 和 BigPicture。我们可以从通知和数据 block 中读取内容
- 后台应用:
onMessageReceived(RemoteMessage remoteMessage) 被调用,系统托盘不会收到消息,因为 notification 键不在响应中。在通知栏中显示 LargeIcon 和 BigPicture
代码
private void sendNotification(Bitmap bitmap, String title, String
message, PendingIntent resultPendingIntent) {
NotificationCompat.BigPictureStyle style = new NotificationCompat.BigPictureStyle();
style.bigPicture(bitmap);
Uri defaultSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
String NOTIFICATION_CHANNEL_ID = mContext.getString(R.string.default_notification_channel_id);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "channel_name", NotificationManager.IMPORTANCE_HIGH);
notificationManager.createNotificationChannel(notificationChannel);
}
Bitmap iconLarge = BitmapFactory.decodeResource(mContext.getResources(),
R.drawable.mdmlogo);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(mContext, NOTIFICATION_CHANNEL_ID)
.setSmallIcon(R.drawable.mdmlogo)
.setContentTitle(title)
.setAutoCancel(true)
.setSound(defaultSound)
.setContentText(message)
.setContentIntent(resultPendingIntent)
.setStyle(style)
.setLargeIcon(iconLarge)
.setWhen(System.currentTimeMillis())
.setPriority(Notification.PRIORITY_MAX)
.setChannelId(NOTIFICATION_CHANNEL_ID);
notificationManager.notify(1, notificationBuilder.build());
}
引用链接:
https://firebase.google.com/docs/cloud-messaging/android/receive
关于android - FCM android onmessagereceived 未调用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47971149/