在Android 8.0之后的版本中,应用需要用户授权才能弹出通知。请确保已经在应用管理器中为应用开启通知权限。可以通过以下代码检查并请求通知权限:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel channel = new NotificationChannel(CHANNEL_ID, CHANNEL_NAME, NotificationManager.IMPORTANCE_DEFAULT);
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.createNotificationChannel(channel);
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && !notificationManager.areNotificationsEnabled()) {
Intent intent = new Intent(Settings.ACTION_APP_NOTIFICATION_SETTINGS);
intent.putExtra(Settings.EXTRA_APP_PACKAGE, getPackageName());
startActivity(intent);
}
Android系统中有多种通知类型,例如铃声、振动、提示灯等。请确保通知类型已正确配置。以下示例代码演示了如何向一个通知添加振动和提示灯:
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.notification_icon)
.setContentTitle("My notification")
.setContentText("Hello World!")
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
.setVibrate(new long[] { 1000, 1000, 1000, 1000 })
.setLights(Color.RED, 3000, 3000);
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
notificationManager.notify(notificationId, builder.build());
某些情况下,Android设备可能会将应用的通知视为垃圾邮件。请检查应用的通知过滤器设置,并将其取消设置为阻止通知。以下示例代码演示如何将应用的通知过滤器重置为默认设置