Question

我在android中进行推送通知。以下代码块在API级别22中不起作用。

   if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel channel = new 
        NotificationChannel(channelId,
                "Channel human readable title",
                NotificationManager.IMPORTANCE_DEFAULT);
        if (notificationManager != null) {
            notificationManager.createNotificationChannel(channel);
        }
    }

如何在API级别22中做到这一点

Answer 1

API 22中没有NotificationChannel。该功能仅在API> = 26中可用。

Answer 2

您可以尝试以下源代码

public void showNotification()
{
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this,"channelID")
            .setSmallIcon(R.drawable.ic_launcher_background)
            .setContentTitle("Notification")
            .setContentText("Hello! This is a notification.")
            .setAutoCancel(true);

    NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    int notificationId = 1;
    createChannel(notificationManager);
    notificationManager.notify(notificationId, notificationBuilder.build());
}

public void createChannel(NotificationManager notificationManager){
    if (Build.VERSION.SDK_INT < 26) {
        return;
    }
    NotificationChannel channel = new NotificationChannel("channelID","name", NotificationManager.IMPORTANCE_DEFAULT);
    channel.setDescription("Hello! This is a notification.");
    notificationManager.createNotificationChannel(channel);
}

此代码适用于每个 android 版本。这是git repo

Android：Oreo通知频道在API级别22中不起作用

2 个答案: