Develop Reference

Turn off notification sounds programmatically after button click on Android Studio

I have only seen ways on how to hide a notification but not anything related to turning off sounds yet. How do I turn off/on the notification sounds from different apps installed on a device, programmatically with a button click? Is it possible for API 29 and higher versions?

You can turn off notification sound by setting your notification priority to low,
NotificationCompat.Builder mBuilder = new
NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.notification_icon)
.setContentTitle("My notification")
.setContentText("Hello World!")
// You must set the priority to support Android 7.1 and lower
.setPriority(NotificationCompat.PRIORITY_LOW) // Set priority to
PRIORITY_LOW to mute notification sound
.setContentIntent(pendingIntent)
.setAutoCancel(true);
Another thing you can do,
myNotification.defaults = 0;
Or if you want to set your priority high and mute notification sound use,
NotificationCompat.Builder.setNotificationSilent()
then create your notification,
val builder = NotificationCompat.Builder(this, CHANNEL_ID)
.setContentText("text")
.setContentTitle("content")
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setNotificationSilent() // just keep this line
.setSmallIcon(R.drawable.logo)
.setTicker("text"))
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
builder.setChannelId(CHANNEL_ID)
}
Do not forget to uninstall and install the application

Show notifications on lock screen of Xiaomi devices

Push notifications not shows on lock screen of Xiaomi devices.
I've tried to use VISIBILITY_PUBLIC in notification builder and channel but it doesn't work.
The problem is that Xiaomi devices has special permission in apps notifications settings which permits to show notification at lock screen. But this permission is turn off by default. But in some apps like "Telegram" this permission is on by default after installation from google play, I can't find the solution how to do that.

Not sure if this helps, but I had a similar problem an a Huawei Device (API 29).
I wanted to use NotificationManager.IMPORTANCE_LOW on my NotificationChannel, but when I was trying to send Notifications on this Huawei Device, they where not Visible on the Lock Screen.
I figured out that there is an App Notification Option on this Huawei Device to use "gentle notifications". Those Notifications are not shown on the Lock Screen and this Option is turned on by Default if your Channel uses IMPORTANCE_LOW or below.
Changing the Importance of the Channel to IMPORTANCE_DEFAULT was solving my Problem.
Since I wanted IMPORTANCE_LOW because I dont wanted an Notification Sound, I just had to do a little workaround and set setSound(null, null) and setVibrationPattern(null).
NotificationChannel nChannel1 = new NotificationChannel(CHANNEL_1_ID, "Channel Name", NotificationManager.IMPORTANCE_DEFAULT);
nChannel1.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
nChannel1.setSound(null, null);
nChannel1.setVibrationPattern(null);
nChannel1.setDescription("Description");
nManager = context.getSystemService(NotificationManager.class);
nManager.createNotificationChannel(nChannel1);
Notification notification = new NotificationCompat.Builder(applicationContext, CHANNEL_1_ID)
.setContentTitle("title")
.setContentText("text")
.setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
.build();
nManager.notify(1, notification);

notification displayed differently depending on whether app is in foreground or background

I'm having trouble with notifications on Android. I use the code below to generate a notification on the device whenever a GCM message is received by my app. However, it's producing unexpected results.
public class MyGcmListenerService extends GcmListenerService implements Constants {
private static final String TAG = "MyGcmListenerService";
#Override
public void onMessageReceived(String from, Bundle data) {
String message = data.getString("msg");
sendNotification(message);
}
private void sendNotification(String message) {
NotificationManager notificationManager =
(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
CharSequence name = getString(R.string.gcm_notification_channel_name);
String description = getString(R.string.gcm_notification_channel_description);
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel channel = new NotificationChannel(GCM_NOTIFICATION_CHANNEL_ID, name,
importance);
channel.setDescription(description);
channel.setLockscreenVisibility(NotificationCompat.VISIBILITY_PUBLIC);
channel.enableVibration(true);
channel.setSound(defaultSoundUri,
new AudioAttributes.Builder()
.setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
.setUsage(AudioAttributes.USAGE_NOTIFICATION_COMMUNICATION_INSTANT)
.build());
notificationManager.createNotificationChannel(channel);
}
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this,
GCM_NOTIFICATION_CHANNEL_ID)
.setContentText(message)
.setContentTitle("My Title")
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setDefaults(Notification.DEFAULT_VIBRATE | Notification.DEFAULT_SOUND)
.setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
.setSmallIcon(R.drawable.ic_notification);
notificationManager.notify(0, notificationBuilder.build());
}
}
If a GCM message is received whilst the app is open (not just running, but actually open on the screen), then the resulting notification has only a title, and doesn't show the message. This screenshot demonstrates this case. Further, if I send multiple GCM messages to the device whilst the app is in the foreground, only one is displayed.
If a message is received whilst the app is either closed or running in the background, the resulting notification shows only the message, and has no title. This screenshot shows the two messages side-by-side - the bottom one was received with the app in the foreground, the top was received with the app in the background. If multiple messages are received whilst the app is in the background, all are displayed (in contrast to what happens when the app is in the foreground). This screenshot shows that multiple messages are displayed when they're received with the app in the background.
Also, the notification only appears as heads-up when the app is in the foreground.
Finally, if received in the foreground, the resulting notification does nothing when tapped. However, if received in the background, the notification opens the app when tapped. Not really bothered by this, just thought it might be indicative of the problem.
FYI: when testing, I tried both keeping the GCM message the same every time, as well as varying it. Both scenarios gave the same result.
What I'd like to figure out:
How to get both the title and message to display regardless of whether app is in foreground or not. This is the most important.
How to get the notification to appear as heads-up when the app is in the background.
Just to pre-empt any responses saying not to abuse heads-up, it's the most important feature of the app (the app must notify users of certain events in real-time), according to our users.
Update:
Bas van Stein's answer allowed me to figure out why the either only the title or message was displayed.
As he correctly pointed out, when the app is in the background, GCM messages are handled by the system. This drove me to inspect the script that is used to send messages by the backend. I realised that the person who wrote this script had sent the message within the title field of the notification field of the GCM message, and there was no body field. So I corrected this issue, and the notifications displayed correctly (for app in background).
This also allowed me to realise that the line String message = data.getString("msg"); in onMessageReceived was returning null. I changed the method as follows:
public void onMessageReceived(String from, Bundle data) {
Bundle notification = data.getBundle("notification");
String title = notification.getString("title");
String message = notification.getString("body");
sendNotification(title, message);
}
Then I added title as a parameter to sendNotification and changed the line that sets the notification title to: .setContentTitle(title). Now notifications are displayed correctly when the app is in the foreground.
Further, I added a static int to the class that I use as the notification ID (incremented every time), so now multiple notifications display correctly.
Still not solved:
I'm still unable to have notifications appear as heads-up when the app is in the background. I tried adding "priority": "high" to the GCM message notification payload, but this had no effect - apparently this is the default for a GCM notification anyway.

This answer will be only a part of the complete solution but here we go:
First issue, the background and foreground notifications seem to be generated by two different functions, you can test this by applying a break point in your code and attach the debugger. You will likely see that the background notification is not triggering the break point in this code. Perhaps you miss a manifest service?
Second issue, that only one notification is being shown is because of this line:
notificationManager.notify(0, notificationBuilder.build());
The 0 here is the notification id, if you create multiple notifications with the same id it will overwrite the notification instead of showing a new one.
Third issue, that the application is not opened on notification tab, is because there is no intent attached to the notification you generate in your code.
You can use something like this for an intent:
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pIntent = PendingIntent.getActivity(this, 0, intent,
PendingIntent.FLAG_ONE_SHOT);
notificationBuilder.setContentIntent(pIntent);
The intent is being called when you click on the notification, this could be any intent so you can open a special activity for example.
Hope this brings you in the correct direction.

How make a notification when app is closed

i want to make a notification when the app is closed.
Im new to Java and i dont now if a need a service or use AlarmManager.
My idea is to make a txt(in my server) with a number, if is 0 dont make the notifiacion, if is 1 make the notificacion and read all the content of other txt and use that text in the notificacion.
I need to check the txt with the number every 1 hour.
And i need this to happen even if the app is closed.
Thanks

What you want to do is called push messaging I recommend looking at Firebase https://firebase.google.com/docs/cloud-messaging/ or Amazon's implementation.

Services are exactly what you are looking for.
They run in background
Can be started again, even if the application is cleared from recent apps
Can be timed to suit your requirements
Very easy to implement
Here is the official documentation.
And this can be a good start tutorial.

You can use this code for sending notification. But do not forget this, onStop method is also valid for clicking on home and recents button. So, whenever you click on home or recents button, a notification will pop up. You can improve this code by listening home and recents button.
public void onStop() {
NotificationCompat.Builder notificationBuilder = (NotificationCompat.Builder) new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.icon24)
.setContentTitle("App Closed")
.setContentText("You've closed the app")
.setTicker("You've closed the app")
.setAutoCancel(true)
.setLargeIcon(BitmapFactory.decodeResource(getApplicationContext().getResources(), R.drawable.icon96))
.setDefaults(Notification.DEFAULT_ALL);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
notificationBuilder.setPriority(Notification.PRIORITY_HIGH);
}
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0, notificationBuilder.build());
super.onStop();
}

Can I use NotificationCompat.BigTextStyle without crashing on older devices?

I don't have any device older than 4.1 to test on. I'm trying to test out pushing my notifications with the code below. It's mostly all taken from the Notification documentation. Would my code crash or does the NotificationCompat class handle all of this for me gracefully?
Under the "Handling Compatability" section it reads:
Handling compatibility
Not all notification features are available for a particular version,
even though the methods to set them are in the support library class
NotificationCompat.Builder. For example, action buttons, which depend
on expanded notifications, only appear on Android 4.1 and higher,
because expanded notifications themselves are only available on
Android 4.1 and higher.
To ensure the best compatibility, create notifications with
NotificationCompat and its subclasses, particularly
NotificationCompat.Builder. In addition, follow this process when you
implement a notification:
...
So does this mean that if I use the NotificationCompat class it will handle all of the compatibility for me?
My code that I'm worried about (because it uses BigTextStyle):
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mContext).setSmallIcon(R.drawable.ic_launcher).setContentTitle("Title")
.setContentText(String.format("%s", message));
// Creates an explicit intent for an Activity in your app
Intent resultIntent = new Intent(mContext, ActivityMain.class);
// The stack builder object will contain an artificial back stack for
// the
// started Activity.
// This ensures that navigating backward from the Activity leads out of
// your application to the Home screen.
TaskStackBuilder stackBuilder = TaskStackBuilder.create(mContext);
// Adds the back stack for the Intent (but not the Intent itself)
stackBuilder.addParentStack(MainActivity.class);
// Adds the Intent that starts the Activity to the top of the stack
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
// Add max priority
mBuilder.setPriority(NotificationCompat.PRIORITY_MAX);
// Add bigTextStyle
NotificationCompat.BigTextStyle bigTextStyle = new NotificationCompat.BigTextStyle();
bigTextStyle.bigText(String.format("%s", message));
mBuilder.setStyle(bigTextStyle);
mBuilder.setAutoCancel(true);
// mId allows you to update the notification later on.
mNotificationManager.notify(1, mBuilder.build());

You have nothing to worry about.
Helper class for generating large-format notifications that include a lot of text.
If the platform does not provide large-format notifications, this method has no effect. The user will always see the normal notification view.
(NotificationCompat.BigTextStyle)