为什么我的通知在 Android > 7 上不起作用？答案

【问题标题】：Why my notification not working on Android > 7?为什么我的通知在 Android > 7 上不起作用？
【发布时间】：2020-03-25 15:18:55
【问题描述】：

我需要有关通知的帮助。这不适用于 Android > 7。我每天上午 10 点使用广播接收器重复我的通知我希望我的通知在 Android 最小 19 到最大 29 上工作。是否可以？有什么帮助吗？

接收者：

public class AlarmReceiverNewUser extends BroadcastReceiver {

    public void onReceive(Context context, Intent intent) {
        String userName = App.SP().getString(App.SHARED_PREFERENCES_USER_NAME, "");
        final String textes[] = {context.getResources().getString(R.string.textNotification1), context.getResources().getString(R.string.textNotification2),
                context.getResources().getString(R.string.textNotification3), context.getResources().getString(R.string.textNotification4),
                context.getResources().getString(R.string.textNotification5), context.getResources().getString(R.string.textNotification6),
                context.getResources().getString(R.string.textNotification7)};
        int idx = new Random().nextInt(textes.length);

        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        Intent intent1 = new Intent(context, FreeCalmBreathActivity.class);
        intent1.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

        Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        PendingIntent pendingIntentSecond = PendingIntent.getActivity(context, 42, intent1, PendingIntent.FLAG_UPDATE_CURRENT);

        NotificationCompat.Builder builder = new NotificationCompat.Builder(context). //Enlever issou si ça bug
                setSmallIcon(R.drawable.ic_logo).
                setContentIntent(pendingIntentSecond).
                setContentText(userName + (textes[idx])).setStyle(new NotificationCompat.BigTextStyle()
                .bigText(userName + (textes[idx]))).
                addAction(R.drawable.ic_check_black_24dp, App.getContext().getResources().getString(R.string.Access), pendingIntentSecond).
                setContentTitle(App.getContext().getResources().getString(R.string.app_name)).
                setSound(alarmSound).
                setNumber(7).
                setChannelId(String.valueOf(42)).
                setAutoCancel(true);
        notificationManager.notify(42, builder.build());
        setNotification(context, 42);
    }

    private void setNotification(Context context, int id) {
        Calendar calender = Calendar.getInstance();
        calender.set(Calendar.HOUR_OF_DAY, 10);
        calender.set(Calendar.MINUTE, 0);
        calender.set(Calendar.SECOND, 0);

        Intent intent = new Intent(context, AlarmReceiverNewUser.class);
        intent.putExtra("NotificationId", id);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, id, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(ALARM_SERVICE);
        alarmManager.setExact(AlarmManager.RTC_WAKEUP, calender.getTimeInMillis() +
                AlarmManager.INTERVAL_DAY, pendingIntent);
    }
}

【问题讨论】：

标签： java android broadcastreceiver android-notifications android-notification-bar

【解决方案1】：

您需要使用 Notification Builder 创建一个通道以在 Android O 中发送通知

NotificationManager mNotificationManager =(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
 mNotificationManager.createNotificationChannel(mChannel);

或者您可以通过检查android版本来发送通知

NotificationManager mNotificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
       mNotificationManager.createNotificationChannel(mChannel);
    }

或者你也可以设置频道ID

NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, Name, Importance);
// Create a notification and set the notification channel.
Notification notification = new Notification.Builder(MainActivity.this)
            .setContentTitle("")
            .setContentText("")
            .setChannelId(CHANNEL_ID)
            .build();

更多详情，您可以查看Official Android Doc

【讨论】：

【解决方案2】：

您需要创建通知通道才能在 N+ 中看到通知

【讨论】：