Android O 报告通知未发布到频道 - 但它是

Question

情侣AndroidO通知问题：

1) 我已经创建了一个通知通道（见下文），正在使用 .setChannelId() 调用构建器（传入我创建的通道的名称，"wakey"；然而，当我运行应用程序，我收到一条消息，说我未能 post 向频道 "null" 发送通知。这可能是什么原因造成的？

2) 我怀疑 #1 的答案可以在它说要检查的 "log" 中找到，但我已经检查了 logcat 并且没有看到任何关于通知或频道的信息.它说要查看的日志在哪里？

这是我用来创建频道的代码：

NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
CharSequence name = context.getString(R.string.app_name);
String description = "yadda yadda"
int importance = NotificationManager.IMPORTANCE_DEFAULT;

NotificationChannel channel = new NotificationChannel(NOTIFICATION_CHANNEL, name, importance);
channel.setDescription(description);

notificationManager.createNotificationChannel(channel);

这是生成通知的代码：

Notification.Builder notificationBuilder;

Intent notificationIntent = new Intent(context, BulbActivity.class);
notificationIntent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND); // Fix for https://code.google.com/p/android/issues/detail?id=53313

PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);

Intent serviceIntent = new Intent(context, RemoteViewToggleService.class);
serviceIntent.putExtra(WakeyService.KEY_REQUEST_SOURCE, WakeyService.REQUEST_SOURCE_NOTIFICATION);

PendingIntent actionPendingIntent = PendingIntent.getService(context, 0, serviceIntent, PendingIntent.FLAG_CANCEL_CURRENT);
_toggleAction = new Notification.Action(R.drawable.ic_power_settings_new_black_24dp, context.getString(R.string.toggle_wakey), actionPendingIntent);

notificationBuilder= new Notification.Builder(context)
    .setContentTitle(context.getString(R.string.app_name))
    .setContentIntent(contentIntent)
    .addAction(_toggleAction);

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
    notificationBuilder.setChannelId(NOTIFICATION_CHANNEL);
}

notificationBuilder.setSmallIcon(icon);
notificationBuilder.setContentText(contentText);
_toggleAction.title = actionText;

int priority = getNotificationPriority(context);
notificationBuilder.setPriority(priority);
notificationBuilder.setOngoing(true);

Notification notification = notificationBuilder.build();
notificationManager.notify(NOTIFICATION_ID, notification);

这是我收到的警告：

Answer 1

我想我已经学到了一些东西，所有这些加起来就是一个答案：

我使用的是模拟器设备，其中的图像不包含 Play 商店。
图像上 Google Play Services 的版本不是最新的，所以我应该收到通知告诉我需要升级。由于该通知未应用于频道，因此未显示。
如果我在 Android Studio 中将 logcat 设置为 "No Filters" 而不是 "Show only selected application"，然后我发现日志指出有问题的通知是 Play服务 "update needed" 通知。

所以，我换了一张包含 Play 商店的图片，它正确地显示了通知（也许该通知的渠道是由 Play 商店设置的？），让我更新到最新的 Google Play Services，从那以后我就再也没有看到那个警告了。

所以，长话短说（太晚了）- Android O，如果您使用 Google Play 服务并在模拟器上进行测试，请选择包含 Play 商店的图像，或者忽略祝酒词（祝你好运！）。

Answer 2

使用以下代码创建通知：

    Notification notification = new Notification.Builder(MainActivity.this)
              .setContentTitle("New Message")
                        .setContentText("You've received new messages.")
                        .setSmallIcon(R.mipmap.ic_launcher)
                        .setChannelId(channelId)
                        .build();

未使用：

Notification notification = new NotificationCompat.Builder(MainActivity.this)
                    .setContentTitle("Some Message")
                    .setContentText("You've received new messages!")
                    .setSmallIcon(R.mipmap.ic_launcher)
                    .setChannel(channelId)
                    .build();

Answer 3

我遇到了同样的问题，使用构造函数解决了

new Notification.Builder(Context context, String channelId)，而不是 deprecated onAPI levels >=26 (Android O)： new NotificationCompat.Builder(Context context)

如果您的 notificationBuilder 是使用已弃用的构造函数构建的，则以下代码将不起作用：

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
notificationBuilder.setChannelId(NOTIFICATION_CHANNEL);}

Answer 4

首先创建通知渠道：

 public static final String NOTIFICATION_CHANNEL_ID = "4565";
//Notification Channel
        CharSequence channelName = NOTIFICATION_CHANNEL_NAME;
        int importance = NotificationManager.IMPORTANCE_LOW;
        NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, NOTIFICATION_CHANNEL_NAME, importance);
        notificationChannel.enableLights(true);
        notificationChannel.setLightColor(Color.RED);
        notificationChannel.enableVibration(true);
        notificationChannel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});


NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.createNotificationChannel(notificationChannel);

然后在构造函数中使用通道id:

final NotificationCompat.Builder builder = new NotificationCompat.Builder(context, NOTIFICATION_CHANNEL_ID)
                .setDefaults(Notification.DEFAULT_ALL)
                .setSmallIcon(R.drawable.ic_timers)
                .setVibrate(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400})
                .setSound(null)
                .setChannelId(NOTIFICATION_CHANNEL_ID)
                .setContent(contentView)
                .setPriority(NotificationCompat.PRIORITY_DEFAULT)
                .setLargeIcon(picture)
                .setTicker(sTimer)
                .setContentIntent(pendingIntent)
                .setAutoCancel(false);

Answer 5

您必须先创建一个 NotificationChannel

val notificationChannel = NotificationChannel("channelId", "channelName", NotificationManager.IMPORTANCE_DEFAULT)
notificationManager.createNotificationChannel(notificationChannel);

这是显示 API 26+

通知的唯一方式

Answer 6

我遇到了同样的问题。它通过创建 NotificationChannel 并使用通知管理器添加新创建的通道得到解决。

Answer 7

我还想补充一点，如果您使用的是构建工具 v26+，您将收到此错误：

app/build.等级:

compileSdkVersion 26
buildToolsVersion "26.0.2"

defaultConfig {
    targetSdkVersion 26

降级到最低版本应该没问题。

Answer 8

您必须先创建一个频道。

private void createNotificationChannel() {
        // Create the NotificationChannel, but only on API 26+ because
        // the NotificationChannel class is new and not in the support library
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            CharSequence name = getString(R.string.channel_name);
            String description = getString(R.string.channel_description);
            int importance = NotificationManager.IMPORTANCE_DEFAULT;
            NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
            channel.setDescription(description);
            // Register the channel with the system; you can't change the importance
            // or other notification behaviors after this
            NotificationManager notificationManager = getSystemService(NotificationManager.class);
            notificationManager.createNotificationChannel(channel);
        }
}

public void notifyThis(String title, String message) {
        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this, CHANNEL_ID)
                .setSmallIcon(R.drawable.green_circle)
                .setContentTitle(title)
                .setContentText(message)
                .setPriority(NotificationCompat.PRIORITY_DEFAULT);

        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);

        // notificationId is a unique int for each notification that you must define
        notificationManager.notify(0, mBuilder.build());
}

最后你调用这个方法：

createNotificationChannel();
notifyThis("My notification", "Hello World!");

Android O 报告通知未发布到频道 - 但它是

Android O reporting notification not posted to channel - but it is

android

notifications

android-8.0-oreo