[英]Xamarin forms: Push notification is not working on Android 7.1.2
推送通知不适用于版本号为 7.1.2 的 Android 设备,但在版本 9 上工作正常。以下是我用于显示通知的代码。
if (Build.VERSION.SdkInt < BuildVersionCodes.O)
{
var intent = new Intent(this, typeof(MainActivity));
intent.AddFlags(ActivityFlags.ClearTop);
var pendingIntent = PendingIntent.GetActivity(this, 0, intent, PendingIntentFlags.OneShot);
var notificationBuilder = new Android.App.Notification.Builder(this, Utils.CHANNEL_ID)
.SetContentTitle(Header)
.SetSmallIcon(Resource.Drawable.icon)
.SetContentText(body)
.SetAutoCancel(true)
.SetContentIntent(pendingIntent);
var notificationManager = NotificationManager.FromContext(this);
notificationManager.Notify(0, notificationBuilder.Build());
}
else
{
var intent = new Intent(this, typeof(MainActivity));
intent.AddFlags(ActivityFlags.ClearTop);
var pendingIntent = PendingIntent.GetActivity(this, 0, intent, PendingIntentFlags.OneShot);
var notificationBuilder = new Android.App.Notification.Builder(this, Utils.CHANNEL_ID)
.SetContentTitle(Header)
.SetSmallIcon(Resource.Drawable.icon)
.SetContentText(body)
.SetAutoCancel(true)
.SetContentIntent(pendingIntent)
.SetChannelId(Utils.CHANNEL_ID);
if (Build.VERSION.SdkInt < BuildVersionCodes.O)
{
return;
}
var channel = new NotificationChannel(Utils.CHANNEL_ID, "FCM Notifications", NotificationImportance.High)
{
Description = "Firebase Cloud Messages appear in this channel"
};
var notificationManager = (NotificationManager)GetSystemService(NotificationService);
notificationManager.CreateNotificationChannel(channel);
notificationManager.Notify(0, notificationBuilder.Build());
}
任何人都可以为此提出解决方案吗?
我从我的生产项目中发布了我的 SendNotification 方法。
按照我的工作代码并更改您的方法。
void SendNotification (string messageBody, string title)
{
var intent = new Intent (this, typeof (SplashActivity));
intent.AddFlags (ActivityFlags.ClearTop);
var pendingIntent = PendingIntent.GetActivity (this, 0, intent, PendingIntentFlags.OneShot);
//if i want more than one notification ,different unique value in every call
Random u = new Random ();
if (Build.VERSION.SdkInt >= BuildVersionCodes.O) {
string channelName = Resources.GetString (Resource.String.channel_name);
NotificationCompat.Builder notificationBuilder;
notificationBuilder = new NotificationCompat.Builder (this, channelName)
.SetContentTitle (title)
.SetSmallIcon (Resource.Drawable.ic_stat_g)
.SetContentText (messageBody)
.SetAutoCancel (true)
.SetContentIntent (pendingIntent);
var notificationManager = GetSystemService (Context.NotificationService) as NotificationManager;
NotificationChannel channel = new NotificationChannel (channelName, "notification channel", NotificationImportance.Default);
notificationManager.CreateNotificationChannel (channel);
notificationManager.Notify (u.Next(), notificationBuilder.Build ());
}
else
{
NotificationCompat.Builder notificationBuilder;
notificationBuilder = new NotificationCompat.Builder (this)
.SetContentTitle (title)
.SetSmallIcon (Resource.Drawable.ic_stat_g)
.SetContentText (messageBody)
.SetAutoCancel (true)
.SetContentIntent (pendingIntent);
var notificationManager = GetSystemService (Context.NotificationService) as NotificationManager;
notificationManager.Notify (u.Next(), notificationBuilder.Build ());
}
}
首先不要使用 Android.App.Notification.Builder 已被弃用。 NotificationCompat.Builder 是新的。
也许这是你的新代码
var intent = new Intent(this, typeof(MainActivity));
intent.AddFlags(ActivityFlags.ClearTop);
var pendingIntent = PendingIntent.GetActivity(this, 0, intent, PendingIntentFlags.OneShot);
if (Build.VERSION.SdkInt < BuildVersionCodes.O)
{
var notificationBuilder = new NotificationCompat.Builder(this)
.SetContentTitle(Header)
.SetSmallIcon(Resource.Drawable.icon)
.SetContentText(body)
.SetAutoCancel(true)
.SetContentIntent(pendingIntent);
var notificationManager = GetSystemService (Context.NotificationService) as NotificationManager;
notificationManager.Notify(0, notificationBuilder.Build());
}
else
{
var notificationBuilder = new NotificationCompat.Builder(this, Utils.CHANNEL_ID)
.SetContentTitle(Header)
.SetSmallIcon(Resource.Drawable.icon)
.SetContentText(body)
.SetAutoCancel(true)
.SetContentIntent(pendingIntent);
var notificationManager = GetSystemService (Context.NotificationService) as NotificationManager;
NotificationChannel channel = new NotificationChannel (Utils.CHANNEL_ID, "FCM Notifications", NotificationImportance.Default);
notificationManager.CreateNotificationChannel (channel);
notificationManager.Notify (0, notificationBuilder.Build ());
}
Firebase 通知的行为取决于接收应用的前台/后台状态。
当您的应用程序在后台时传递的通知消息。 在这种情况下,通知将传送到设备的系统托盘。 默认情况下,用户点击通知会打开应用程序启动器。
在后台接收时具有通知和数据负载的消息。 在这种情况下,通知被传送到设备的系统托盘,数据有效负载被传送到启动器 Activity 的意图的额外内容中。
有关更多信息,请访问https://firebase.google.com/docs/cloud-messaging/android/receive
我也有这个示例代码供您尝试:
var notificationManager = GetSystemService(Context.NotificationService) as NotificationManager;
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
{
NotificationChannel notificationChannel = new NotificationChannel("my_channel", "This is my Notification Channel", NotificationImportance.High);
builder.SetChannelId("my_channel");
notificationManager.CreateNotificationChannel(notificationChannel);
}
var notification = builder.SetContentIntent(PendingIntent.GetActivity(this, 0, intent, PendingIntentFlags.Immutable))
.SetSmallIcon(Resource.Drawable.icon)
.SetContentTitle(Header)
.SetContentText(body)
//Set vibrate
.SetVibrate(new long[] { 200, 200, 200, 200 })
//LED
.SetLights(Android.Graphics.Color.Blue, 1000, 1000)
//Auto cancel will remove the notification once the user touches it
.SetAutoCancel(true).Build();
notificationManager.Notify(0, notification);
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