Develop Reference

Notification doesn't work - Android Studio

So I am a beginner and I was following one tutorial on how to make notification in Android Studio. This app should make a notification when you press a button, but instead of making notification it shows up a Developer Warning
Error:
No Channel found for pkg=com.example.myapplication, channelId=My notification, id=1, tag=null, opPkg=com.example.myapplication, callingUid=10153, userId=0, incomingUserId=0, notificationUid=10153, notification=Notification(channel=My notification shortcut=null contentView=null vibrate=null sound=null defaults=0x0 flags=0x10 color=0x00000000 vis=PRIVATE)
Code(Java):
public void onClick(View v) {
NotificationCompat.Builder builder = new NotificationCompat.Builder(MainActivity.this,"My notification");
builder.setContentTitle("My Title");
builder.setContentText("Test");
builder.setSmallIcon(R.drawable.ic_launcher_background);
builder.setAutoCancel(true);
NotificationManagerCompat managerCompat = NotificationManagerCompat.from(MainActivity.this);
managerCompat.notify(null,0, builder.build());
}
});
Do you know how to fix this?

Starting with Android 8.0 (API level 26), notifications require a notification channel.
This is a category which you create and assign to your notifications. Having multiple notification channels per app, allows users to better manage which kind of notifications they want to receive from an app.
To achieve this, you need to create a notification channel as stated in the example in the Android docs:
private void createNotificationChannel() {
// Create the NotificationChannel, but only on API 26+ because
// the NotificationChannel class is new and not in the support library
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
CharSequence name = getString(R.string.channel_name);
String description = getString(R.string.channel_description);
int importance = NotificationManager.IMPORTANCE_DEFAULT;
NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
channel.setDescription(description);
// Register the channel with the system; you can't change the importance
// or other notification behaviors after this
NotificationManager notificationManager = getSystemService(NotificationManager.class);
notificationManager.createNotificationChannel(channel);
}
}
Source
CHANNEL_ID can be any integer number which doesn't change during the lifetime of your app. It is OK if you make it a static final int.
Once you created the channel, you can specify the same CHANNEL_ID when creating notifications:
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.notification_icon)
.setContentTitle(textTitle)
.setContentText(textContent)
.setPriority(NotificationCompat.PRIORITY_DEFAULT);
Source

private Notification getNotification() {
Intent notificationIntent = new Intent(this, VideoExportActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
NotificationChannel notificationChannel = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
notificationChannel = new NotificationChannel("CHANNEL_ID", "Alarm Time....", NotificationManager.IMPORTANCE_DEFAULT);
}
NotificationManager notificationManager = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
notificationManager = getSystemService(NotificationManager.class);
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
notificationManager.createNotificationChannel(notificationChannel);
}
return new NotificationCompat.Builder(this, "CHANNEL_ID")
.setContentTitle("Title")
.setContentText("Your Message")
.setSmallIcon(R.drawable.ic_launcher_foreground)
.setContentIntent(pendingIntent)
.build();
}
Notification notification = getNotification();

Why my notification does not work in android TV emulator?

I am trying to implement an android TV application by using android studio and TV emulator.
I call the following code blocks at the onCreate function of the main activity. It is running for android mobile devices but not working on the Android TV emulator.
String channel_name = "myChannel";
String channel_description = "mySChannel";
String CHANNEL_ID = "idididf";
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.ic_my_icon)
.setContentTitle("My notification")
.setContentText("Much longer text that cannot fit one line...")
.setStyle(new NotificationCompat.BigTextStyle()
.bigText("Much longer text that cannot fit one line..."))
.setPriority(NotificationCompat.PRIORITY_DEFAULT);
NotificationManager notificationManager = getSystemService(NotificationManager.class);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
CharSequence name = channel_name;
String description = channel_description;
int importance = NotificationManager.IMPORTANCE_DEFAULT;
NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
channel.setDescription(description);
// Register the channel with the system; you can't change the importance
// or other notification behaviors after this
notificationManager.createNotificationChannel(channel);
}
notificationManager.notify(12312, builder.build()); // 0 is the request code, it should be unique id
Any idea?

With very few exceptions, notifications are not shown on Android TV.

Action icon added in notification not showing up

I am trying to create a notification for Incoming call. For that I have added two actions in notification. My action text only is displayed.Action icon is not displayed in notification.
I want to add icon near Answer and cancel which I added as AddAction in Notification. I have added action icon like below,
NotificationCompat.Action answerAction = new NotificationCompat.Action.Builder(R.drawable.answer_call_icon, "Answer", pendingIntent).build();
NotificationCompat.Action cancelAction = new NotificationCompat.Action.Builder(R.drawable.cancel, "Cancel", pendingIntent).build();
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
.setLargeIcon((BitmapFactory.decodeResource(getResources(), R.drawable.call_logo)))
.setContentTitle(intent.getStringExtra("Number"))
.setSmallIcon(R.drawable.call_logo)
.setContentIntent(pendingIntent)
.setAutoCancel(true)
.setFullScreenIntent(pendingIntent, true)
.setCategory(NotificationCompat.CATEGORY_CALL)
.addAction(answerAction)
.addAction(cancelAction)
.setPriority(NotificationCompat.PRIORITY_HIGH);
NotificationManagerCompat nManager = NotificationManagerCompat.from(this);
nManager.notify(2,builder.build());
One more query,
Below is my notification channnel,
NotificationChannel chan = new NotificationChannel(NOTIFICATION_CHANNEL_ID, channelName, NotificationManager.IMPORTANCE_HIGH);
chan.setLightColor(Color.BLUE);
chan.setLockscreenVisibility(Notification.FLAG_FOREGROUND_SERVICE);
chan.setImportance(NotificationManager.IMPORTANCE_HIGH);
chan.setSound(defaultRingToneUri,audioAttributes);
chan.enableLights(true);
chan.shouldShowLights();
chan.setVibrationPattern(vibrate);
chan.enableVibration(true);
Context context=getApplicationContext();
NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
assert manager != null;
manager.createNotificationChannel(chan);
Not able to get ringtone while receiving notification. Is the way Im setting sound is right??
Anybody please help me to solve this...
Posted 2 days ago..but till now not able to find solution.

As per the Notifications in Android N blog post:
Notification actions have also received a redesign and are now in a visually separate bar below the notification.
You’ll note that the icons are not present in the new notifications; instead more room is provided for the labels themselves in the constrained space of the notification shade. However, the notification action icons are still required and continue to be used on older versions of Android and on devices such as Android Wear.
So it is expected that you do not see the icons associated with notification actions.

If you need more flexibility in creating the notification layout, go for the custom one.
Ref: https://developer.android.com/training/notify-user/custom-notification
Use the Drawable left/right option to set an icon with text in the button.
// Get the layouts to use in the custom notification
RemoteViews notificationLayout = new RemoteViews(getPackageName(), R.layout.notification_small);
RemoteViews notificationLayoutExpanded = new RemoteViews(getPackageName(), R.layout.notification_large);
// Apply the layouts to the notification
Notification customNotification = new NotificationCompat.Builder(context, CHANNEL_ID)
.setSmallIcon(R.drawable.notification_icon)
.setStyle(new NotificationCompat.DecoratedCustomViewStyle())
.setCustomContentView(notificationLayout)
.setCustomBigContentView(notificationLayoutExpanded)
.build();

As I understand: you have a problem with your notification you can use this method :
private void showSmallNotification(NotificationCompat.Builder mBuilder, int icon, String title, String message, String timeStamp, PendingIntent resultPendingIntent, Uri alarmSound) {
NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
inboxStyle.addLine(message);
Notification notification;
notification = mBuilder.setSmallIcon(icon).setTicker(title).setWhen(0)
.setAutoCancel(true)
.setContentTitle(title)
.setContentIntent(resultPendingIntent)
.setSound(alarmSound)
.setStyle(inboxStyle)
.setWhen(getTimeMilliSec(timeStamp))
.setContentText(message)
.build();
NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(Constant.NOTIFICATION_ID, notification);
}
or this one :
private void showBigNotification(Bitmap bitmap, NotificationCompat.Builder mBuilder, int icon, String title, String message, String timeStamp, PendingIntent resultPendingIntent, Uri alarmSound) {
NotificationCompat.BigPictureStyle bigPictureStyle = new NotificationCompat.BigPictureStyle();
bigPictureStyle.setBigContentTitle(title);
bigPictureStyle.setSummaryText(Html.fromHtml(message).toString());
bigPictureStyle.bigPicture(bitmap);
Notification notification;
notification = mBuilder.setSmallIcon(icon).setTicker(title).setWhen(0)
.setAutoCancel(true)
.setContentTitle(title)
.setContentIntent(resultPendingIntent)
.setSound(alarmSound)
.setStyle(bigPictureStyle)
.setWhen(getTimeMilliSec(timeStamp))
.setContentText(message)
.build();
NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(Constant.NOTIFICATION_ID_BIG_IMAGE, notification);
}

To play ringtone you can make use of android mediaplayer as shown below:
Var _mediaPlayer = MediaPlayer.Create(this,
Android.Provider.Settings.System.DefaultRingtoneUri);
_mediaPlayer.Start();
Task.Delay(60 * 1000).ContinueWith(t => _mediaPlayer?.Stop()); //stop after 60sec
You can take the global instance of _mediaPlayer and stop this as per user interaction with notification.
This is the c# xamarin android example, you can use the same class with java syntax.

Android notification not showing on Oreo

I have a simple notification which works for me on older androids. But this same notification doesnt pop up on my phone with android oreo. I read that i need to assign channel with notification, which i did. But still, it doesnt pop up.
Thanks
My code -
String CHANNEL_ID = "my_channel_01";
String name = "notification";
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, name, importance);
NotificationManager mManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification.Builder(this,CHANNEL_ID)
.setContentTitle("New Message")
.setContentText("You've received new messages.")
.setSmallIcon(R.drawable.common_google_signin_btn_icon_dark)
.setChannelId(CHANNEL_ID)
.build();

I think you are missing mManager.createNotificationChannel(mChannel);

Why it Showing deprecated API usage in Notificationcompat.Builder [duplicate]

After upgrading my project to Android O
buildToolsVersion "26.0.1"
Lint in Android Studio is showing a deprecated warning for the follow notification builder method:
new NotificationCompat.Builder(context)
The problem is: Android Developers update their Documentation describing NotificationChannel to support notifications in Android O, and provide us with a snippet, yet with the same deprecated warning:
Notification notification = new Notification.Builder(MainActivity.this)
.setContentTitle("New Message")
.setContentText("You've received new messages.")
.setSmallIcon(R.drawable.ic_notify_status)
.setChannelId(CHANNEL_ID)
.build();
Notifications Overview
My question: Is there is any other solution for building notification, and still support Android O?
A solution I found is to pass the channel ID as a parameter in Notification.Builder constructor. But this solution is not exactly reusable.
new Notification.Builder(MainActivity.this, "channel_id")

It is mentioned in the documentation that the builder method NotificationCompat.Builder(Context context) has been deprecated. And we have to use the constructor which has the channelId parameter:
NotificationCompat.Builder(Context context, String channelId)
NotificationCompat.Builder Documentation:
This constructor was deprecated in API level 26.0.0-beta1. use
NotificationCompat.Builder(Context, String) instead. All posted
Notifications must specify a NotificationChannel Id.
Notification.Builder Documentation:
This constructor was deprecated in API level 26. use
Notification.Builder(Context, String) instead. All posted
Notifications must specify a NotificationChannel Id.
If you want to reuse the builder setters, you can create the builder with the channelId, and pass that builder to a helper method and set your preferred settings in that method.

Here is working code for all android versions as of API LEVEL 26+ with backward compatibility.
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(getContext(), "M_CH_ID");
notificationBuilder.setAutoCancel(true)
.setDefaults(Notification.DEFAULT_ALL)
.setWhen(System.currentTimeMillis())
.setSmallIcon(R.drawable.ic_launcher)
.setTicker("Hearty365")
.setPriority(Notification.PRIORITY_MAX) // this is deprecated in API 26 but you can still use for below 26. check below update for 26 API
.setContentTitle("Default notification")
.setContentText("Lorem ipsum dolor sit amet, consectetur adipiscing elit.")
.setContentInfo("Info");
NotificationManager notificationManager = (NotificationManager) getContext().getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(1, notificationBuilder.build());
UPDATE for API 26 to set Max priority
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
String NOTIFICATION_CHANNEL_ID = "my_channel_id_01";
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "My Notifications", NotificationManager.IMPORTANCE_MAX);
// Configure the notification channel.
notificationChannel.setDescription("Channel description");
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.RED);
notificationChannel.setVibrationPattern(new long[]{0, 1000, 500, 1000});
notificationChannel.enableVibration(true);
notificationManager.createNotificationChannel(notificationChannel);
}
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
notificationBuilder.setAutoCancel(true)
.setDefaults(Notification.DEFAULT_ALL)
.setWhen(System.currentTimeMillis())
.setSmallIcon(R.drawable.ic_launcher)
.setTicker("Hearty365")
// .setPriority(Notification.PRIORITY_MAX)
.setContentTitle("Default notification")
.setContentText("Lorem ipsum dolor sit amet, consectetur adipiscing elit.")
.setContentInfo("Info");
notificationManager.notify(/*notification id*/1, notificationBuilder.build());

Call the 2-arg constructor: For compatibility with Android O, call support-v4 NotificationCompat.Builder(Context context, String channelId). When running on Android N or earlier, the channelId will be ignored. When running on Android O, also create a NotificationChannel with the same channelId.
Out of date sample code: The sample code on several JavaDoc pages such as Notification.Builder calling new Notification.Builder(mContext) is out of date.
Deprecated constructors: Notification.Builder(Context context) and v4 NotificationCompat.Builder(Context context) are deprecated in favor of Notification[Compat].Builder(Context context, String channelId). (See Notification.Builder(android.content.Context) and v4 NotificationCompat.Builder(Context context).)
Deprecated class: The entire class v7 NotificationCompat.Builder is deprecated. (See v7 NotificationCompat.Builder.) Previously, v7 NotificationCompat.Builder was needed to support NotificationCompat.MediaStyle. In Android O, there's a v4 NotificationCompat.MediaStyle in the media-compat library's android.support.v4.media package. Use that one if you need MediaStyle.
API 14+: In Support Library from 26.0.0 and higher, the support-v4 and support-v7 packages both support a minimum API level of 14. The v# names are historical.
See Recent Support Library Revisions.

Instead of checking for Build.VERSION.SDK_INT >= Build.VERSION_CODES.O as many answers suggest, there is a slightly simpler way -
Add the following line to the application section of AndroidManifest.xml file as explained in the Set Up a Firebase Cloud Messaging Client App on Android doc:
<meta-data
android:name="com.google.firebase.messaging.default_notification_channel_id"
android:value="#string/default_notification_channel_id" />
Then add a line with a channel name to the values/strings.xml file:
<string name="default_notification_channel_id">default</string>
After that you will be able to use the new version of NotificationCompat.Builder constructor with 2 parameters (since the old constructor with 1 parameter has been deprecated in Android Oreo):
private void sendNotification(String title, String body) {
Intent i = new Intent(this, MainActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pi = PendingIntent.getActivity(this,
0 /* Request code */,
i,
PendingIntent.FLAG_ONE_SHOT);
Uri sound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder builder = new NotificationCompat.Builder(this,
getString(R.string.default_notification_channel_id))
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle(title)
.setContentText(body)
.setAutoCancel(true)
.setSound(sound)
.setContentIntent(pi);
NotificationManager manager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(0, builder.build());
}

Here is the sample code, which is working in Android Oreo and less than Oreo.
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
NotificationCompat.Builder builder = null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
int importance = NotificationManager.IMPORTANCE_DEFAULT;
NotificationChannel notificationChannel = new NotificationChannel("ID", "Name", importance);
notificationManager.createNotificationChannel(notificationChannel);
builder = new NotificationCompat.Builder(getApplicationContext(), notificationChannel.getId());
} else {
builder = new NotificationCompat.Builder(getApplicationContext());
}
builder = builder
.setSmallIcon(R.drawable.ic_notification_icon)
.setColor(ContextCompat.getColor(context, R.color.color))
.setContentTitle(context.getString(R.string.getTitel))
.setTicker(context.getString(R.string.text))
.setContentText(message)
.setDefaults(Notification.DEFAULT_ALL)
.setAutoCancel(true);
notificationManager.notify(requestCode, builder.build());

Simple Sample
public void showNotification (String from, String notification, Intent intent) {
PendingIntent pendingIntent = PendingIntent.getActivity(
context,
Notification_ID,
intent,
PendingIntent.FLAG_UPDATE_CURRENT
);
String NOTIFICATION_CHANNEL_ID = "my_channel_id_01";
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "My Notifications", NotificationManager.IMPORTANCE_DEFAULT);
// Configure the notification channel.
notificationChannel.setDescription("Channel description");
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.RED);
notificationChannel.setVibrationPattern(new long[]{0, 1000, 500, 1000});
notificationChannel.enableVibration(true);
notificationManager.createNotificationChannel(notificationChannel);
}
NotificationCompat.Builder builder = new NotificationCompat.Builder(context, NOTIFICATION_CHANNEL_ID);
Notification mNotification = builder
.setContentTitle(from)
.setContentText(notification)
// .setTicker("Hearty365")
// .setContentInfo("Info")
// .setPriority(Notification.PRIORITY_MAX)
.setContentIntent(pendingIntent)
.setAutoCancel(true)
// .setDefaults(Notification.DEFAULT_ALL)
// .setWhen(System.currentTimeMillis())
.setSmallIcon(R.mipmap.ic_launcher)
.setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.mipmap.ic_launcher))
.build();
notificationManager.notify(/*notification id*/Notification_ID, mNotification);
}

Notification notification = new Notification.Builder(MainActivity.this)
.setContentTitle("New Message")
.setContentText("You've received new messages.")
.setSmallIcon(R.drawable.ic_notify_status)
.setChannelId(CHANNEL_ID)
.build();
Right code will be :
Notification.Builder notification=new Notification.Builder(this)
with dependency 26.0.1 and new updated dependencies such as 28.0.0.
Some users use this code in the form of this :
Notification notification=new NotificationCompat.Builder(this)//this is also wrong code.
So Logic is that which Method you will declare or initilize then the same methode on Right side will be use for Allocation. if in Leftside of = you will use some method then the same method will be use in right side of = for Allocation with new.
Try this code...It will sure work

Need to declare a Notification channel with Notification_Channel_ID
Build notification with that channel ID.
For example,
...
public static final String NOTIFICATION_CHANNEL_ID = MyLocationService.class.getSimpleName();
...
...
NotificationChannel channel = new NotificationChannel(NOTIFICATION_CHANNEL_ID,
NOTIFICATION_CHANNEL_ID+"_name",
NotificationManager.IMPORTANCE_HIGH);
NotificationManager notifManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notifManager.createNotificationChannel(channel);
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
.setContentTitle(getString(R.string.app_name))
.setContentText(getString(R.string.notification_text))
.setOngoing(true)
.setContentIntent(broadcastIntent)
.setSmallIcon(R.drawable.ic_tracker)
.setPriority(PRIORITY_HIGH)
.setCategory(Notification.CATEGORY_SERVICE);
startForeground(1, builder.build());
...

This constructor was deprecated in API level 26.1.0.
use NotificationCompat.Builder(Context, String) instead. All posted Notifications must specify a NotificationChannel Id.

I build this code which allows you show notificaciones to android api level < 26 or api level >= 26
private void showNotifcation(String title, String body) {
//Este método muestra notificaciones compatibles con Android Api Level < 26 o >=26
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
//Mostrar notificacion en Android Api level >=26
final String CHANNEL_ID = "HEADS_UP_NOTIFICATIONS";
NotificationChannel channel = new NotificationChannel(
CHANNEL_ID,
"MyNotification",
NotificationManager.IMPORTANCE_HIGH);
getSystemService(NotificationManager.class).createNotificationChannel(channel);
Notification.Builder notification = new Notification.Builder(this, CHANNEL_ID)
.setContentTitle(title)
.setContentText(body)
.setSmallIcon(R.drawable.ic_launcher_background)
.setAutoCancel(true);
NotificationManagerCompat.from(this).notify(1, notification.build());
}else{
//Mostrar notificación para Android Api Level Menor a 26
String NOTIFICATION_CHANNEL_ID = "my_channel_id_01";
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
.setContentTitle(title)
.setContentText(body)
.setSmallIcon(R.drawable.ic_launcher_background)
.setAutoCancel(true);
NotificationManager notificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(/*notification id*/1, notificationBuilder.build());
}
}
Cheers!