31

我需要在 android 4.0 及以上版本的状态栏中实现展开和折叠通知。我在谷歌上搜索过这个但没有得到任何代码解决方案有没有人知道如何实现这个

先感谢您

4

6 回答 6

47

可扩展Notification是 a 的一种特殊情况Notification Big View。如果Big View它不在通知抽屉的顶部,它显示为“关闭”并且可以通过滑动展开。来自 Android 开发者的引用:

通知的大视图仅在通知展开时出现,这发生在通知位于通知抽屉的顶部时,或者当用户使用手势展开通知时。从 Android 4.1 开始提供扩展通知。

Big View Notification可以按如下方式创建:

Notification notification = new Notification.BigTextStyle(builder)
.bigText(myText).build();

或者

Notification notification = new Notification.BigPictureStyle(builder)
.bigPicture(
  BitmapFactory.decodeResource(getResources(),
    R.drawable.my_picture)).build();

是一个教程。

于 2012-12-05T10:40:09.413 回答
43
Notification noti = new Notification.Builder()
... // The same notification properties as the others
.setStyle(new Notification.BigPictureStyle().bigPicture(mBitmap))
.build();

你改变

.setStyle(new NotificationCompat.BigTextStyle().bigText(th_alert))

连同公告一起OK!!!

notification = new NotificationCompat.Builder(context)

这是一个例子:

可扩展的通知和通知组

您可以设置代码

Intent intent = new Intent(context, ReserveStatusActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
NotificationManager notificationManager =
            (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
intent = new Intent(String.valueOf(PushActivity.class));
intent.putExtra("message", MESSAGE);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addParentStack(PushActivity.class);
stackBuilder.addNextIntent(intent);
// PendingIntent pendingIntent =
stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);

// android.support.v4.app.NotificationCompat.BigTextStyle bigStyle = new     NotificationCompat.BigTextStyle();
// bigStyle.bigText((CharSequence) context);

notification = new NotificationCompat.Builder(context)
    .setSmallIcon(R.mipmap.ic_launcher)
    .setContentTitle(th_title)
    .setContentText(th_alert)
    .setAutoCancel(true)
 // .setStyle(new Notification.BigTextStyle().bigText(th_alert)  ตัวเก่า
 // .setStyle(new NotificationCompat.BigTextStyle().bigText(th_title))
    .setStyle(new NotificationCompat.BigTextStyle().bigText(th_alert))
    .setContentIntent(pendingIntent)
    .setNumber(++numMessages)
    .build();

notification.sound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
notificationManager.notify(1000, notification);

或者

private void sendNotification(RemoteMessage.Notification notification, Map<String, String> data) {
            Bitmap icon = BitmapFactory.decodeResource(getResources(), R.drawable.logo);
    
            Intent intent = new Intent(this, MainActivity.class);
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT);
    
            NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                   // .setContentTitle(notification.getTitle())
                    .setContentTitle(getResources().getText(R.string.app_name))
                    .setContentText(notification.getBody())
                    .setAutoCancel(true)
                    .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
                    .setContentIntent(pendingIntent)
                    .setStyle(new NotificationCompat.BigTextStyle().bigText(notification.getBody()))
                    .setContentInfo(notification.getTitle())
                    .setLargeIcon(icon)
                    .setColor(Color.RED)
                    .setSmallIcon(R.drawable.logo);
    
            try {
                String picture_url = data.get("picture_url");
                if (picture_url != null && !"".equals(picture_url)) {
                    URL url = new URL(picture_url);
                    Bitmap bigPicture = BitmapFactory.decodeStream(url.openConnection().getInputStream());
                    notificationBuilder.setStyle(
                            new NotificationCompat.BigPictureStyle().bigPicture(bigPicture).setSummaryText(notification.getBody())
                    );
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
    
            notificationBuilder.setDefaults(Notification.DEFAULT_VIBRATE);
            notificationBuilder.setLights(Color.YELLOW, 1000, 300);
    
            NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            notificationManager.notify(0, notificationBuilder.build());
        }

27/07/2021 :

您应该可以阅读详细信息:Expandable Notifications and Notifications Groups

于 2015-09-28T20:09:15.800 回答
3

我无法在 Notification的 .setStyle() 方法中设置new NotificationCompat.BigTextStyle()的新实例。所以我在.setStyle() 中使用了下面的new Notification.BigTextStyle()的新实例。

      Notification builder =new Notification.Builder(this)
                    .setSmallIcon(Notification_icons[icon])
                    .setContentTitle(title)
                    .setContentText(description)
                    .setChannelId(channelID_Default)
                    .setOngoing(true)
                    .setStyle(new Notification.BigTextStyle()
                            .bigText(description))
                    .build();
于 2019-05-15T15:26:22.173 回答
1

此功能有一种方法,您可以在通知折叠时显示一个小图标,并在通知展开时显示一个大图标。

val bitmap = BitmapFactory.decodeResource(resources, R.drawable.notification)

var notification = NotificationCompat.Builder(context, CHANNEL_ID)
    .setSmallIcon(R.drawable.new_post)
    .setContentTitle(imageTitle)
    .setContentText(imageDescription)
    .setLargeIcon(bitmap)
    .setStyle(NotificationCompat.BigPictureStyle()
            .bigPicture(bitmap)
            .bigLargeIcon(null))
    .build()
于 2019-03-05T05:51:23.057 回答
0

我们无法在 android 4.1 以下版本中创建可扩展通知。但是我们可以这样做,而不是这样做,我们可以堆叠通知,然后我们可以为我们漂亮的自定义活动设置一个挂起的意图,它会在列表中显示所有通知。用户会很高兴看到这个:)

于 2014-02-07T11:39:16.303 回答
0

(2021) 当我在扩展具有更大文本的通知时遇到问题时偶然发现了这个问题。通过参考可扩展通知上的 Android 文档解决:创建可扩展通知

Nimisha V 的回答显示了如何在通知上展开大图像。下面的代码用于扩展通知上的大文本

var notification = NotificationCompat.Builder(context, CHANNEL_ID)
    .setSmallIcon(R.drawable.icon)
    .setContentTitle(notification_title)
    .setContentText(notification_message)
    .setStyle(NotificationCompat.BigTextStyle()
            .bigText(notification_message))
    .build()
于 2021-07-20T02:13:28.067 回答