Develop Reference

Need to dismiss the notification on tap when App is in foreground - android

Im testing the push notification with my app.
when App in the foreground:
Step 1. Received the notification (in system tray).
2. now, I'm in some other screen than the home screen.
3. Actual Problem: On tap on the notification, it is going to the home screen.
4. Expected: If the app is in the foreground, just I need to cancel on tap of the notification. (No need to swipe.)
when App in background/killed: (Works well)
Step 1. Received the notification (in the system tray)
2. On tap, open the home screen of the app.
Tried with setting launch mode flags in intent. Not helped. Below is my code. Please suggest the solution guys.
Intent resultIntent = new Intent(this, MainActivity.class);
//resultIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
// resultIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK);
PendingIntent resultPendingIntent =
PendingIntent.getActivity(
this,
0,
resultIntent,
PendingIntent.FLAG_UPDATE_CURRENT
);
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this);
mBuilder.setContentIntent(resultPendingIntent);
mBuilder.setSmallIcon(R.mipmap.ic_launcher);
mBuilder.setContentTitle(title);
mBuilder.setContentText(body);
mBuilder.setAutoCancel(true);
mBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(body));
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
mBuilder.setChannelId(TestUtils.creatChanel(this).getId());
}
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(642, mBuilder.build());

Not sure about dismiss notification on tap, but since your concern is wrong navigation.
We can check app is in foreground or not and prevent new activity to be opened from notification click, if app is in foreground.
//If app is in foreground setting pending intent to null
PendingIntent pendingIntent;
Intent notificationIntent = new Intent(getApplicationContext(), Main2Activity.class);
if(isAppInForeground()){
Log.e("--^","inForeground");
pendingIntent = null;
}else{
Log.e("--^","inBackground");
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
}
Add this function (SOURCE: link)
private boolean isAppInForeground() {
ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningAppProcessInfo> services = activityManager.getRunningAppProcesses();
boolean isActivityFound = false;
if (services.get(0).processName
.equalsIgnoreCase(getPackageName()) && services.get(0).importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
isActivityFound = true;
}
return isActivityFound;
}
In this case if notification came when app is in foreground, it will do nothing if clicked. So user has only one option left to swipe it to remove.

You can create Custom Notification with close button to close notification using RemoteViews
// create Notification with RemoteViews:
RemoteViews remoteViews= new RemoteViews(getApplicationContext().getPackageName(), R.layout.your_custom_notification);
Intent closeIntent = new Intent(context, CloseNotificationService.class);
hangUpIntent.setAction("close");
PendingIntent pendingCloseIntent = PendingIntent.getBroadcast(this, 0, closeNotification, PendingIntent.FLAG_UPDATE_CURRENT);
remoteViews.setOnClickPendingIntent(R.id.cancel_notification, pendingCloseIntent);
// create notification here..
Notification customNotification = new NotificationCompat.Builder(context, CHANNEL_ID)
.setSmallIcon(R.drawable.notification_icon)
.setStyle(new NotificationCompat.DecoratedCustomViewStyle())
.setCustomContentView(remoteViews)
.build();
OnClick of close button it will redirect to service class:
public class CloseNotificationService extends IntentService {
/**
* Creates an IntentService. Invoked by your subclass's constructor.
*/
public CloseNotificationService() {
super("notificationIntentService");
}
#Override
protected void onHandleIntent(#Nullable Intent intent) {
switch (intent.getAction()) {
case "close":
Handler hangUpHandler = new Handler(Looper.getMainLooper());
hangUpHandler.post(new Runnable() {
#Override
public void run() {
NotificationManager notifManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notifManager.cancel(notificationId); // get notification id from intent.
}
});
break;
}
}
}
For more information of RemoteViews you can refer official google developer website https://developer.android.com/training/notify-user/custom-notification

Instead of this:
Intent resultIntent = new Intent(this, MainActivity.class);
do this:
Intent resultIntent = getPackageManager().getLaunchIntentForPackage("your.package.name");
and put that in your Notification. This will launch the app if it is not already running, otherwise it will just bring the app's task to the foreground in whatever state it was when the user last used it. If the user is already in the app (ie: on another screen), this will do nothing when the user clicks the Notification.
Should be exactly what you are looking for.

Inside your launcher activity have you tried notification manager class cancelAll() method??
In this way if there is already a notification on launch then it will cancelled automatically

Heads-up Notification Buttons Not Executing

I have been searching for a few hours, but could not find any solution to my problem. Does anyone know how to make heads-up notification buttons call a broadcast? My code:
Alarm Receiver Notification Builder:
NotificationCompat.Builder builder =
new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.alarmicon)
.setContentTitle("Alarm for " + timeString)
.setContentText(MainActivity.alarmLabel.getText().toString())
.setDefaults(Notification.DEFAULT_ALL) // must requires VIBRATE permission
.setPriority(NotificationCompat.PRIORITY_HIGH); //must give priority to High, Max which will considered as heads-up notification
//set intents and pending intents to call service on click of "dismiss" action button of notification
Intent dismissIntent = new Intent(context, notificationButtonAction.class);
dismissIntent.setAction(DISMISS_ACTION);
PendingIntent piDismiss = PendingIntent.getBroadcast(context, 0, dismissIntent, 0);
builder.addAction(R.drawable.alarmoff, "Dismiss", piDismiss);
//set intents and pending intents to call service on click of "snooze" action button of notification
Intent snoozeIntent = new Intent(context, notificationButtonAction.class);
snoozeIntent.setAction(SNOOZE_ACTION);
PendingIntent piSnooze = PendingIntent.getBroadcast(context, 0, snoozeIntent, 0);
builder.addAction(R.drawable.snooze, "Snooze", piSnooze);
// Gets an instance of the NotificationManager service
NotificationManager notificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
//to post your notification to the notification bar with a id. If a notification with same id already exists, it will get replaced with updated information.
notificationManager.notify(0, builder.build());
notificationButtonAction:
public static class notificationButtonAction extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
System.out.println("notificationButtonAction Started");
String action = intent.getAction();
if (SNOOZE_ACTION.equals(action)) {
stopAlarm();
System.out.println("Alarm Snoozed");
MainActivity ma = new MainActivity();
ma.setAlarm(true);
}
else if (DISMISS_ACTION.equals(action)) {
stopAlarm();
System.out.println("Alarm Dismissed");
}
}
}
My print lines in notificationButtonAction do not print, not even the "notificationButtonAction Started."
I followed the tutorial from Brevity Software (http://www.brevitysoftware.com/blog/how-to-get-heads-up-notifications-in-android/), but their code didn't seem to work.
Any help is appreciated! Thanks!

Turns out, I didn't add the class to the manifest. My code was fine.

How to add button to notifications in android?

My app plays music and when users open notifications screen by swiping from the top of the screen ( or generally from the bottom right of the screen on tablets ), I want to present them a button to stop the currently playing music and start it again if they want.
I am not planning to put a widget on the user's home screen, but just into notifications. How can I do this?

You can create an intent for the action (in this case stop playing) and then add it as an action button to your notification.
Intent snoozeIntent = new Intent(this, MyBroadcastReceiver.class);
snoozeIntent.setAction(ACTION_SNOOZE);
snoozeIntent.putExtra(EXTRA_NOTIFICATION_ID, 0);
PendingIntent snoozePendingIntent =
PendingIntent.getBroadcast(this, 0, snoozeIntent, 0);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.notification_icon)
.setContentTitle("My notification")
.setContentText("Hello World!")
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
.setContentIntent(pendingIntent)
.addAction(R.drawable.ic_snooze, getString(R.string.snooze),
snoozePendingIntent);
Please refer to the Android documentation.

I will try to provide a solution that I have used and most of the music player also use the same technique to show player controls in notification bar.
I am running a service which is used to manage Media Player and all its controls. Activity User control interacts with Service by sending Intents to the service for example
Intent i = new Intent(MainActivity.this, MyRadioService.class);
i.setAction(Constants.Player.ACTION_PAUSE);
startService(i);
TO receive intents and perform action in Service class I am using following code in onStartCommand method of Service
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (intent.getAction().equals(Constants.Player.ACTION_PAUSE)) {
if(mediaPlayer.isPlaying()) {
pauseAudio();
}
}
Now to exact answer to your question to show notification with playing controls. You can call following methods to show notification with controls.
// showNotification
private void startAppInForeground() {
// Start Service in Foreground
// Using RemoteViews to bind custom layouts into Notification
RemoteViews views = new RemoteViews(getPackageName(),
R.layout.notification_status_bar);
// Define play control intent
Intent playIntent = new Intent(this, MyRadioService.class);
playIntent.setAction(Constants.Player.ACTION_PLAY);
// Use the above play intent to set into PendingIntent
PendingIntent pplayIntent = PendingIntent.getService(this, 0,
playIntent, 0);
// binding play button from layout to pending play intent defined above
views.setOnClickPendingIntent(R.id.status_bar_play, pplayIntent);
views.setImageViewResource(R.id.status_bar_play,
R.drawable.status_bg);
Notification status = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
status = new Notification.Builder(this).build();
}
status.flags = Notification.FLAG_ONGOING_EVENT;
status.icon = R.mipmap.ic_launcher;
status.contentIntent = pendingIntent;
startForeground(Constants.FOREGROUND_SERVICE, status);
}
Hope this really helps you. And you will be able to achieve what you want. Have a Happy Coding :)

// It shows buttons on lock screen (notification).
Notification notification = new Notification.Builder(context)
.setVisibility(Notification.VISIBILITY_PUBLIC)
.setSmallIcon(R.drawable.NotIcon)
.addAction(R.drawable.ic_prev, "button1",ButtonOneScreen)
.addAction(R.drawable.ic_pause, "button2", ButtonTwoScreen)
.....
.setStyle(new Notification.MediaStyle()
.setShowActionsInCompactView(1)
.setMediaSession(mMediaSession.getSessionToken())
.setContentTitle("your choice")
.setContentText("Again your choice")
.setLargeIcon(buttonIcon)
.build();
Please refer this for more details Click here

tested, working code with android Pie. These all go inside the same service class.
Show a notification:
public void setNotification() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
{
NotificationChannel channel = new NotificationChannel("a", "status", NotificationManager.IMPORTANCE_DEFAULT);
channel.setDescription("notifications");
notificationManager = getSystemService(NotificationManager.class);
notificationManager.createNotificationChannel(channel);
}
else
notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
Receiver.service = this;
Notification.MediaStyle style = new Notification.MediaStyle();
notification = new Notification.Builder(this)
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle("Notification")
.addAction(R.drawable.close_icon, "quit_action", makePendingIntent("quit_action"))
.setStyle(style);
style.setShowActionsInCompactView(0);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
{
notification.setChannelId("a");
}
// notificationManager.notify(123 , notification.build()); // pre-oreo
startForeground(126, notification.getNotification());
}
Helper function:
public PendingIntent makePendingIntent(String name)
{
Intent intent = new Intent(this, FloatingViewService.Receiver.class);
intent.setAction(name);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
return pendingIntent;
}
To handle the actions:
static public class Receiver extends BroadcastReceiver {
static FloatingViewService service;
#Override
public void onReceive(Context context, Intent intent)
{
String whichAction = intent.getAction();
switch (whichAction)
{
case "quit_action":
service.stopForeground(true);
service.stopSelf();
return;
}
}
}
You'll need to update your manifest too:
<receiver android:name=".FloatingViewService$Receiver">
<intent-filter>
<action android:name="quit_action" />
</intent-filter>
</receiver>

I think that beside Ankit Gupta answer, you can use MediaSession (API > 21) to add native mediaController view :
notificationBuilder
.setStyle(new Notification.MediaStyle()
.setShowActionsInCompactView(new int[]{playPauseButtonPosition}) // show only play/pause in compact view
.setMediaSession(mSessionToken))
.setColor(mNotificationColor)
.setSmallIcon(R.drawable.ic_notification)
.setVisibility(Notification.VISIBILITY_PUBLIC)
.setUsesChronometer(true)
.setContentIntent(createContentIntent(description)) // Create an intent that would open the UI when user clicks the notification
.setContentTitle(description.getTitle())
.setContentText(description.getSubtitle())
.setLargeIcon(art);
Source: tutorial
you can alse create custom view and display it in the notificcation area , first answer here is great.

you can add button as below and can perform action on that button also i have done for me as below please check.
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_logo)
.setAutoCancel(true)
.setContentTitle(name)
.setContentText(body)
.setGroupSummary(true)
.addAction(android.R.drawable.ic_menu_directions, "Mark as read", morePendingIntent);
//morePendingIntent(do your stuff)
PendingIntent morePendingIntent = PendingIntent.getBroadcast(
this,
REQUEST_CODE_MORE,
new Intent(this, NotificationReceiver.class)
.putExtra(KEY_INTENT_MORE, REQUEST_CODE_MORE)
.putExtra("bundle", object.toString()),
PendingIntent.FLAG_UPDATE_CURRENT
);

I don't know if this is the right way or not, but it works.
Create a BroadCastReceiver class to receive the data when button is pressed.
public class MyBroadCastReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
String log = "URI: " + intent.toUri(Intent.URI_INTENT_SCHEME);
Log.d("my", "LOG:::::::" + log);
}
}
Now in any activity where you want to create the notification -
Intent intent = new Intent();
intent.setAction("unique_id");
intent.putExtra("key", "any data you want to send when button is pressed");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, REQUEST_CODE, intent, 0);
Now use this pending intent when you are creating the notification and lastly you need to register this broadcast in order to receive it in MyBroadCastReceiver class.
BroadcastReceiver br = new MyBroadCastReceiver();
IntentFilter filter = new IntentFilter("unique_id");
registerReceiver(br, filter);
Now if you want to do certain things when the button is pressed, you can do so in the onReceive() method in MyBroadCastReceiver class.

catch on swipe to dismiss event

I'm using an android notification to alert the user once a service is finished (success or failure), and I want to delete local files once the process is done.
My problem is that in the event of failure - I want to let the user a "retry" option. and if he chooses not to retry and to dismiss the notification I want to delete local files saved for the process purposes (images...).
Is there a way to catch the notification's swipe-to-dismiss event?

DeleteIntent:
DeleteIntent is a PendingIntent object that can be associated with a notification and gets fired when the notification gets deleted, ether by :
User specific action
User Delete all the notifications.
You can set the Pending Intent to a broadcast Receiver and then perform any action you want.
Intent intent = new Intent(this, MyBroadcastReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this.getApplicationContext(), 0, intent, 0);
Builder builder = new Notification.Builder(this):
..... code for your notification
builder.setDeleteIntent(pendingIntent);
MyBroadcastReceiver
public class MyBroadcastReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
.... code to handle cancel
}
}

A fully flushed out answer (with thanks to Mr. Me for the answer):
1) Create a receiver to handle the swipe-to-dismiss event:
public class NotificationDismissedReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
int notificationId = intent.getExtras().getInt("com.my.app.notificationId");
/* Your code to handle the event here */
}
}
2) Add an entry to your manifest:
<receiver
android:name="com.my.app.receiver.NotificationDismissedReceiver"
android:exported="false" >
</receiver>
3) Create the pending intent using a unique id for the pending intent (the notification id is used here) as without this the same extras will be reused for each dismissal event:
private PendingIntent createOnDismissedIntent(Context context, int notificationId) {
Intent intent = new Intent(context, NotificationDismissedReceiver.class);
intent.putExtra("com.my.app.notificationId", notificationId);
PendingIntent pendingIntent =
PendingIntent.getBroadcast(context.getApplicationContext(),
notificationId, intent, 0);
return pendingIntent;
}
4) Build your notification:
Notification notification = new NotificationCompat.Builder(context)
.setContentTitle("My App")
.setContentText("hello world")
.setWhen(notificationTime)
.setDeleteIntent(createOnDismissedIntent(context, notificationId))
.build();
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(notificationId, notification);

Another Idea:
if you create a notification normally you also need the actions one, two or 3 of them. I've created a "NotifyManager" it creates all notifications i need and also receive all Intent calls.
So i can manage all the actions AND also the catch the dismiss event at ONE place.
public class NotifyPerformService extends IntentService {
#Inject NotificationManager notificationManager;
public NotifyPerformService() {
super("NotifyService");
...//some Dagger stuff
}
#Override
public void onHandleIntent(Intent intent) {
notificationManager.performNotifyCall(intent);
}
to create the deleteIntent use this (in the NotificationManager):
private PendingIntent createOnDismissedIntent(Context context) {
Intent intent = new Intent(context, NotifyPerformMailService.class).setAction("ACTION_NOTIFY_DELETED");
PendingIntent pendingIntent = PendingIntent.getService(context, SOME_NOTIFY_DELETED_ID, intent, 0);
return pendingIntent;
}
and THAT i use to set the delete Intent like this (in the NotificationManager):
private NotificationCompat.Builder setNotificationStandardValues(Context context, long when){
String subText = "some string";
NotificationCompat.Builder builder = new NotificationCompat.Builder(context.getApplicationContext());
builder
.setLights(ContextUtils.getResourceColor(R.color.primary) , 1800, 3500) //Set the argb value that you would like the LED on the device to blink, as well as the rate
.setAutoCancel(true) //Setting this flag will make it so the notification is automatically canceled when the user clicks it in the panel.
.setWhen(when) //Set the time that the event occurred. Notifications in the panel are sorted by this time.
.setVibrate(new long[]{1000, 1000}) //Set the vibration pattern to use.
.setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.mipmap.ic_launcher))
.setSmallIcon(R.drawable.ic_white_24dp)
.setGroup(NOTIFY_GROUP)
.setContentInfo(subText)
.setDeleteIntent(createOnDismissedIntent(context))
;
return builder;
}
and finally in the same NotificationManager is the perform function:
public void performNotifyCall(Intent intent) {
String action = intent.getAction();
boolean success = false;
if(action.equals(ACTION_DELETE)) {
success = delete(...);
}
if(action.equals(ACTION_SHOW)) {
success = showDetails(...);
}
if(action.equals("ACTION_NOTIFY_DELETED")) {
success = true;
}
if(success == false){
return;
}
//some cleaning stuff
}

How to dismiss notification after action has been clicked

Since API level 16 (Jelly Bean), there is the possibility to add actions to a notification with
builder.addAction(iconId, title, intent);
But when I add an action to a notification and the action is pressed, the notification is not going to be dismissed.
When the notification itself is being clicked, it can be dismissed with
notification.flags = Notification.FLAG_AUTO_CANCEL;
or
builder.setAutoCancel(true);
But obviously, this has nothing to with the actions associated to the notification.
Any hints? Or is this not part of the API yet? I did not find anything.

When you called notify on the notification manager you gave it an id - that is the unique id you can use to access it later (this is from the notification manager:
notify(int id, Notification notification)
To cancel, you would call:
cancel(int id)
with the same id. So, basically, you need to keep track of the id or possibly put the id into a Bundle you add to the Intent inside the PendingIntent?

Found this to be an issue when using Lollipop's Heads Up Display notification. See design guidelines. Here's the complete(ish) code to implement.
Until now, having a 'Dismiss' button was less important, but now it's more in your face.
Building the Notification
int notificationId = new Random().nextInt(); // just use a counter in some util class...
PendingIntent dismissIntent = NotificationActivity.getDismissIntent(notificationId, context);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
builder.setPriority(NotificationCompat.PRIORITY_MAX) //HIGH, MAX, FULL_SCREEN and setDefaults(Notification.DEFAULT_ALL) will make it a Heads Up Display Style
.setDefaults(Notification.DEFAULT_ALL) // also requires VIBRATE permission
.setSmallIcon(R.drawable.ic_action_refresh) // Required!
.setContentTitle("Message from test")
.setContentText("message")
.setAutoCancel(true)
.addAction(R.drawable.ic_action_cancel, "Dismiss", dismissIntent)
.addAction(R.drawable.ic_action_boom, "Action!", someOtherPendingIntent);
// Gets an instance of the NotificationManager service
NotificationManager notifyMgr = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
// Builds the notification and issues it.
notifyMgr.notify(notificationId, builder.build());
NotificationActivity
public class NotificationActivity extends Activity {
public static final String NOTIFICATION_ID = "NOTIFICATION_ID";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
manager.cancel(getIntent().getIntExtra(NOTIFICATION_ID, -1));
finish(); // since finish() is called in onCreate(), onDestroy() will be called immediately
}
public static PendingIntent getDismissIntent(int notificationId, Context context) {
Intent intent = new Intent(context, NotificationActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
intent.putExtra(NOTIFICATION_ID, notificationId);
PendingIntent dismissIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
return dismissIntent;
}
}
AndroidManifest.xml (attributes required to prevent SystemUI from focusing to a back stack)
<activity
android:name=".NotificationActivity"
android:taskAffinity=""
android:excludeFromRecents="true">
</activity>

I found that when you use the action buttons in expanded notifications, you have to write extra code and you are more constrained.
You have to manually cancel your notification when the user clicks an action button. The notification is only cancelled automatically for the default action.
Also if you start a broadcast receiver from the button, the notification drawer doesn't close.
I ended up creating a new NotificationActivity to address these issues. This intermediary activity without any UI cancels the notification and then starts the activity I really wanted to start from the notification.
I've posted sample code in a related post Clicking Android Notification Actions does not close Notification drawer.

In new APIs don't forget about TAG:
notify(String tag, int id, Notification notification)
and correspondingly
cancel(String tag, int id)
instead of:
cancel(int id)
https://developer.android.com/reference/android/app/NotificationManager

In my opinion using a BroadcastReceiver is a cleaner way to cancel a Notification:
In AndroidManifest.xml:
<receiver
android:name=.NotificationCancelReceiver" >
<intent-filter android:priority="999" >
<action android:name="com.example.cancel" />
</intent-filter>
</receiver>
In java File:
Intent cancel = new Intent("com.example.cancel");
PendingIntent cancelP = PendingIntent.getBroadcast(context, 0, cancel, PendingIntent.FLAG_CANCEL_CURRENT);
NotificationCompat.Action actions[] = new NotificationCompat.Action[1];
NotificationCancelReceiver
public class NotificationCancelReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
//Cancel your ongoing Notification
};
}

You will need to run the following code after your intent is fired to remove the notification.
NotificationManagerCompat.from(this).cancel(null, notificationId);
NB: notificationId is the same id passed to run your notification

You can always cancel() the Notification from whatever is being invoked by the action (e.g., in onCreate() of the activity tied to the PendingIntent you supply to addAction()).

Just put this line :
builder.setAutoCancel(true);
And the full code is :
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder.setSmallIcon(android.R.drawable.ic_dialog_alert);
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://www.google.co.in/"));
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
builder.setContentIntent(pendingIntent);
builder.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.misti_ic));
builder.setContentTitle("Notifications Title");
builder.setContentText("Your notification content here.");
builder.setSubText("Tap to view the website.");
Toast.makeText(getApplicationContext(), "The notification has been created!!", Toast.LENGTH_LONG).show();
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
builder.setAutoCancel(true);
// Will display the notification in the notification bar
notificationManager.notify(1, builder.build());

Just for conclusion:
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
Intent intent = new Intent(context, MyNotificationReceiver.class);
intent.putExtra("Notification_ID", 2022);
PendingIntent pendingIntent = PendingIntent.getBroadcast(
context,
0,
intent,
...);
Notification notification = new NotificationCompat.Builder(...)
...
.addAction(0, "Button", pendingIntent)
.build();
notificationManager.notify(2022, notification);
and for dismiss the notification, you have two options:
approach 1: (in MyNotificationReceiver)
NotificationManager manager = (NotificationManager)
context.getSystemService(NOTIFICATION_SERVICE);
manager.cancel(intent.getIntExtra("Notification_ID", -1));
approach 2: (in MyNotificationReceiver)
NotificationManagerCompat manager = NotificationManagerCompat.from(context);
manager.cancel(intent.getIntExtra("Notification_ID", -1));
and finally in manifest:
<receiver android:name=".MyNotificationReceiver" />

builder.setAutoCancel(true);
Tested on Android 9 also.