Android studio 带有alarm manager和broadcastreceiver的Android studio通知未发布通知

我正在尝试让我的应用程序定期发送通知（下面的代码设置为30秒进行测试，但我会将其更改为每月一次）

我正在跟踪另一个SO帖子的代码

代码运行时不会出错，但不会发送通知。有人能告诉我为什么这不起作用吗

这是我的活动代码（请求代码设置为0）：

这是我的接收机等级：

public class ClassReciever extends BroadcastReceiver {

    private static final String TAG = "Receiver";

    @Override
    public void onReceive(Context context, Intent intent) {
        showNotification(context);
    }

    public void showNotification(Context context) {

        int reqCode = 0;

        Log.d(TAG, "jjjj5: " + "three" );

        Intent intent = new Intent(context, AddBudget.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(context, reqCode, intent, 0);
        NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
                .setSmallIcon(R.drawable.icon2)
                .setContentTitle("Title")
                .setContentText("Some text");

        builder.setContentIntent(pendingIntent);
        builder.setDefaults(Notification.DEFAULT_SOUND);
        builder.setAutoCancel(true);
        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        assert notificationManager != null;
        notificationManager.notify(reqCode, builder.build());

        Log.d(TAG, "jjjj6: " + "four" );


    }



}

舱单：

        <receiver android:name= ".ClassReciever" />

    </application>

---

您的代码很好。这没什么问题。但是，如果您想将Android 8.0及以上版本的设备作为目标，即API 26+，则必须在发送通知之前创建通知通道

private fun 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) {
        val name = getString(R.string.channel_name) // this will be displayed in app settings name it wisely 
        val descriptionText = getString(R.string.channel_description) // this will be displayed in app settings name it wisely
        val importance = NotificationManager.IMPORTANCE_DEFAULT
        val channel = NotificationChannel(CHANNEL_ID, name, importance).apply {
            description = descriptionText
        }
        // Register the channel with the system
        val notificationManager: NotificationManager =
            getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        notificationManager.createNotificationChannel(channel)
    }
}

创建频道后，使用该

频道\u ID

发送如下通知：

val builder = NotificationCompat.Builder(this, CHANNEL_ID)
        .setSmallIcon(R.drawable.notification_icon)
        .setContentTitle("My notification")
        .setContentText("Hello World!")
        .setPriority(NotificationCompat.PRIORITY_DEFAULT)
        // Set the intent that will fire when the user taps the notification
        .setContentIntent(pendingIntent)
        .setAutoCancel(true)

---

有关此日志或java代码的更多信息，请检查此

是否至少可以看到您在showNotification（）中编写的日志？是的，我是-我编码到showNotification（）中的两个日志每30秒显示在我的Logcat中。所以ShowNotification（）方法正在运行-只是没有显示任何通知。您能告诉我们您正在尝试的设备规格吗？您好，我希望我对您的理解是正确的，您是指我正在运行应用程序的手机的品牌等吗？我用的是三星a 30。如果我误解了你的意思，或者你需要更多的细节，请告诉我。谢谢你，这就成功了。

val builder = NotificationCompat.Builder(this, CHANNEL_ID)
        .setSmallIcon(R.drawable.notification_icon)
        .setContentTitle("My notification")
        .setContentText("Hello World!")
        .setPriority(NotificationCompat.PRIORITY_DEFAULT)
        // Set the intent that will fire when the user taps the notification
        .setContentIntent(pendingIntent)
        .setAutoCancel(true)