如何以编程方式打开所有这些设置?
我注意到当您安装 WhatsApp 时,它们一开始都处于开启状态(请看下图)。
但是我找不到以编程方式打开它们的方法。
这是我发送通知的方式:
private void sendNotification(Intent intent){
Context context = NotificationService.this;
//open the activity after the notification is clicked
Intent intent1 = new Intent(getApplicationContext(),MainActivity.class);
PendingIntent pIntent = PendingIntent.getActivity(context, 0, intent1, 0);
Notification.Builder builder = new Notification.Builder(context)
.setTicker("Notification")
.setContentTitle("Important Message")
.setContentText("This is an example of a push notification using a Navigation Manager")
.setSmallIcon(R.drawable.ic_add)
.setContentIntent(pIntent);
NotificationManager notificationManager = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);
Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
//These are necessary for the notification to pop up
if(Build.VERSION.SDK_INT < Build.VERSION_CODES.O){
builder.setPriority(Notification.PRIORITY_MAX);
builder.setSound(alarmSound);
builder.setLights(Color.BLUE, 500, 500);
}
//after android O we must use notification channels
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
{
String channelId = "Your_channel_id";
NotificationChannel channel = new NotificationChannel(
channelId,
"Reminder to remind to review your notes",
NotificationManager.IMPORTANCE_HIGH);
if(alarmSound != null){
AudioAttributes att = new AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_NOTIFICATION)
.setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
.build();
channel.setSound(alarmSound,att);
}
channel.setLightColor(Color.BLUE);
channel.enableVibration(true);
channel.setDescription("Hello Dear friends"); //this is to test what this is
channel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
channel.setVibrationPattern(new long[]{300, 300, 300});
notificationManager.createNotificationChannel(channel);
builder.setChannelId(channelId);
}
Notification notification = builder.build();
notificationManager.notify(0, notification);
}
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我还添加了此权限以显示:
<uses-permission android:name="android.permission.ACCESS_NOTIFICATION_POLICY" />
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更新: 在模拟器上使用此代码,我会收到提醒通知。但是在我的小米设备上,没有提示通知。它只是出现在状态栏上。如果我手动打开浮动通知(您可以在照片中看到),那么我将收到提醒通知。但默认情况下它们是关闭的。当您安装 Whatsapp 时,它们都已打开。这对 Whatsapp 来说是一种特权吗?或者有没有办法做到这一点?
默认情况下,当您安装应用程序时,系统会注册默认不支持抬头通知的默认通知通道(低优先级),并将其关闭。你无法控制这一点。
但是您可以做的是创建自己的具有最高优先级的通知通道,然后在应用程序运行一次时注册它。
之后,只需将通道 ID 传递给您的通知生成器,以便系统显示您想要的平视通知。
更多信息可以在这里找到https://developer.android.com/training/notify-user/channels
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