Question

我试图在我的应用中显示通知。一切似乎都没问题，但在Android 8.0 Oreo中，如果我杀了应用程序，则不会显示通知。在之前的Android版本中，这不是问题。

我的源代码是下一个。

public class NotificationHelper extends ContextWrapper {

private static final int NOTIFICATION_ID = 600;
private static final String NOTIFICATION_CHANNEL_ID = "bmedio_v6";         // This is the Notification Channel ID. More about this in the next section
private static final String NOTIFICATION_CHANNEL_NAME = "medio";             //User visible Channel Name
private static final String NOTIFICATION_CHANNEL_DESC = "Medio Channel";             //User visible Channel Name

public NotificationHelper(Context base) {
    super(base);
}

public void showNotification(String title, String message) {

    NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    NotificationCompat.Builder notificationBuilder;

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, NOTIFICATION_CHANNEL_NAME, NotificationManager.IMPORTANCE_HIGH);

        // Configure the notification channel.
        notificationChannel.setDescription(NOTIFICATION_CHANNEL_DESC);
        notificationChannel.enableLights(true);
        notificationChannel.setLightColor(Color.BLUE);
        notificationChannel.setVibrationPattern(new long[]{0, 1000, 500, 1000});
        notificationChannel.enableVibration(true);
        notificationManager.createNotificationChannel(notificationChannel);

        notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
    }else{
        notificationBuilder = new NotificationCompat.Builder(this);
    }

    notificationBuilder.setAutoCancel(true)
            .setDefaults(Notification.DEFAULT_ALL)
            .setWhen(System.currentTimeMillis())
            .setSmallIcon(R.drawable.ic_icon_notify)
            //     .setPriority(Notification.PRIORITY_MAX)
            .setContentTitle(title)
            .setContentText(message);

    notificationManager.notify(NOTIFICATION_ID, notificationBuilder.build());

}

}

Answer 1

使用com.google.android.gms库：play-services-gcm＆＃39; 9.6.0或更高版本问题解决了。我使用的是GCM，而不是FCM。

Answer 2

我也遇到了同样的问题，然后我找到了解决方案，您需要从电池优化列表中删除您的应用程序，并标记您的应用程序未优化，我在 onePlus5 ，在终止应用程序后，通知仍然有效。

步骤：

转到设置
点击电池选项
点击电池优化，它将显示正在优化的应用列表。
找到您的应用，选择不要优化，然后完成！

现在我发现了，所以现在我需要看看如何使用代码来做到这一点。请让我知道您是否遇到相同的问题，否则它将解决您的问题。：

Answer 3

        Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

        PendingIntent resultPendingIntent = PendingIntent.getActivity(this, 0, resultIntent, PendingIntent.FLAG_CANCEL_CURRENT);

        NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();

        inboxStyle.addLine(message);

        NotificationManager mNotificationManager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);

        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
            NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getApplicationContext(),"channel_01")
                    .setSmallIcon(R.mipmap.ic_launcher)
                    .setContentText(message)
                    .setContentIntent(resultPendingIntent)
                    .setAutoCancel(true)
                    .setPriority(Notification.PRIORITY_HIGH)
                    .setChannelId("channel_01")
                    .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
                    .setStyle(inboxStyle)
                    .setContentTitle(Title);

            mNotificationManager.notify(Notification_ID, mBuilder.build());

            NotificationChannel channel = new NotificationChannel(Notification_ID, "Playback Notification", NotificationManager.IMPORTANCE_HIGH);
            channel.enableLights(true);
            channel.enableVibration(true);
            channel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});
            assert mNotificationManager != null;
            mBuilder.setChannelId("channel_01");
            mNotificationManager.createNotificationChannel(channel);

        }else {
            NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getApplicationContext(),Notification_ID)
                    .setSmallIcon(R.mipmap.ic_launcher)
                    .setContentTitle(Title)
                    .setContentIntent(resultPendingIntent)
                    .setContentText(message)
                    .setStyle(inboxStyle)
                    .setSound(soundUri)
                    .setAutoCancel(true);
            mNotificationManager.notify(Notification_ID, mBuilder.build());
        }

Answer 4

需要在手机中启用自动启动

我们无法直接启用自动启动。我们应该导航到该屏幕

try {
    Intent intent = new Intent();
    String manufacturer = android.os.Build.MANUFACTURER;
    if ("xiaomi".equalsIgnoreCase(manufacturer)) {
        intent.setComponent(new ComponentName("com.miui.securitycenter", "com.miui.permcenter.autostart.AutoStartManagementActivity"));
    } else if ("oppo".equalsIgnoreCase(manufacturer)) {
        intent.setComponent(new ComponentName("com.coloros.safecenter", "com.coloros.safecenter.permission.startup.StartupAppListActivity"));
    } else if ("vivo".equalsIgnoreCase(manufacturer)) {
        intent.setComponent(new ComponentName("com.vivo.permissionmanager", "com.vivo.permissionmanager.activity.BgStartUpManagerActivity"));
    }

    List<ResolveInfo> list = context.getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
    if  (list.size() > 0) {
        context.startActivity(intent);
    } 
} catch (Exception e) {
    Crashlytics.logException(e);
}

如果应用未运行，Oreo中的通知无法正常工作

4 个答案: