我正在尝试进行抬头通知工作.已创建通知,但它未显示在应用顶部.
这是负责构建通知的代码:
Notification notification = new NotificationCompat.Builder(context)
.setSmallIcon(android.R.drawable.arrow_up_float)
.setContentTitle("Check running time - click!")
.setContentText(String.valueOf(elapsedTime))
.setContentIntent(pendingIntent)
.setDefaults(Notification.DEFAULT_ALL)
.setPriority(Notification.PRIORITY_HIGH)
.setVibrate(new long[0])
.build();
我正在尝试运行该应用程序的设备是API 21.我见过很多线程,但没有解决方案对我有用.
最佳答案 你需要做两件事:
>确保正确配置了通知.见:https://developer.android.com/guide/topics/ui/notifiers/notifications#Heads-up
>并确保手机配置正确(我认为这是大部分卡住的地方).
Step 1. Configure the notification.
像这样注册您的通知渠道
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
String name = getString(R.string.channel_name);
String description = getString(R.string.channel_description);
int importance = NotificationManager.IMPORTANCE_HIGH; //Important for heads-up notification
NotificationChannel channel = new NotificationChannel("1", name, importance);
channel.setDescription(description);
channel.setShowBadge(true);
channel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
NotificationManager notificationManager = getSystemService(NotificationManager.class);
notificationManager.createNotificationChannel(channel);
}
然后,创建一个通知,如下所示:
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this, "1")
.setSmallIcon(R.drawable.notification_icon)
.setContentTitle(textTitle)
.setContentText(textContent)
.setDefaults(DEFAULT_SOUND | DEFAULT_VIBRATE) //Important for heads-up notification
.setPriority(Notification.PRIORITY_MAX); //Important for heads-up notification
最后,像通常那样发送通知,例如:
Notification buildNotification = mBuilder.build();
NotificationManager mNotifyMgr = (NotificationManager) context.getSystemService(NOTIFICATION_SERVICE);
mNotifyMgr.notify(001, buildNotification);
Step 2. Configure the phone.
我注意到我必须在手机上启用一些额外的设置(小米Note 3):
以下是一些访问菜单的方法:
>长按通知栏中的通知.
>转到:设置>已安装的应用>选择你的应用>通知
>改进上一步,您可以通过使用此意图将用户发送到已安装的应用程序菜单,从而帮助用户:
startActivity(new Intent(Settings.ACTION_MANAGE_APPLICATIONS_SETTINGS));
最后,当您到达此菜单时,启用称为“浮动通知”的设置(此设置的名称因设备而异).