Setup

https://assetstore.unity.com/packages/tools/integration/shortcuts-manager-for-android-191767

Here you will learn how to Add, Update, Remove and Pin dynamic shortcuts to your app.

Add Shortcut

public const string OPEN_SCREEN = "screen_to_be_opened";

public void AddProfileShortcut () {
    // Instance of UnityPlayerActivity
    var activity = ShortcutsManager.Instance.GetCurrentAndroidActivity ();
    
    // The actual Shortcut object
    var profileShortcut = new Shortcut (
        "user_profile_id", // shortcut id
        "Profile", // shortcut short label
        "Open profile and update your statistics!", // shortcut long label
        "account_box", // icon name
        0 // rank / order
    );
    
    // Intent object which will be 'executed' when
    // the user click on the shortcut
    var profileIntent = new Intent ()
        // Set intent action. 
        .SetAction (IntentActions.ACTION_VIEW)
        // Set intent class name.
        .SetClassName (activity, ShortcutsManager.UNITY_PLAYER_ACTIVITY)
        // Set intent flags
        .SetFlags (IntentFlags.FLAG_ACTIVITY_SINGLE_TOP)
        // Put int extra to the intent in order to be able
        // to detect which screen we should open when the user
        // clicks the shortcut.
        .PutExtra (OPEN_SCREEN, (int) Screens.PROFILE);

    // Tell the ShortcutManager to add the shortcut with
    // the intent which should be executed when the shortcut
    // is clicked.
    ShortcutsManager.Instance.AddDynamicShortcut (
        profileShortcut, 
        profileIntent
    );
}

Update Shortcut

// Id of the shortcut which you want to update.
var id = "profile_id"; 

// If shortcut with this id does not exist, GetShortcutById will return null.
// Otherwise it will return valid shortcut object.
var shortcut = ShortcutsManager.Instance.GetShortcutById (id);
if (shortcut != null) {
    // Update short label
    shortcut.SetShortLabel ("New Short Label");
    // Update long label
    shortcut.SetLongLabel ("New Long Label");
    // Update icon name
    shortcut.SetIconName ("New Icon Name");
    // Update rank
    shortcut.SetRank (1);

    // Pass the shortcut object to the the manager for update.
    ShortcutsManager.Instance.UpdateShortcut (shortcut);
}

You can update an array of shortcuts together using:

var shortcutsArray = new Shortcut[size];
// Populate the array, get all shortcurs which you want to update
// in batch. Update all of them and pass to ShortcutsManager.
ShortcutsManager.Instance.UpdateShortcuts (shortcutsArray);

Or update the Shortcut with it's Intent together:

var shortcut = ShortcutsManager.Instance.GetShortcutById (id);
if (shortcut != null) {
    // ... Update shortcut data
    var intent = new Intent();
    // ... Update intent
    
    // Pass shortcut and intent object to ShortcutsManager to update.
    ShortcutsManager.Instance.UpdateShortcut (shortcut, intent)
}

Remove Shortcut

var shortcutId = "id";

// To remove a shortcut just call RemoveShortcutById.
ShortcutsManager.Instance.RemoveShortcutById(shortcutId);

You can remove shortcuts in batch by id too:

var shortcutIds = new string[size];
// Populate the array with ids of all shortcuts which
// you want to remove and pass the array to ShortcutsManager.
ShortcutsManager.Instance.RemoveShortcutsById();

If you want to remove all dynamic shortcuts you can just call:

ShortcutsManager.Instance.RemoveAllDynamicShortcuts();

Pin Shortcut

If you want to pin a shortcut you can do it easily by using:

var shortcutId = "id";
ShortcutsManager.Instance.RequestPinShortcutById(shortcutId);

Or by passing a Shortcut object and an Intent:

var id = "shortcut_id";
var shortcut = ShortcutsManager.Instance.GetShortcutById (id);
var intent = new Intent();
// Set data, classname and etc to the intent object.

// Keep in mind that this will present the user a dialog
// to pin the shortcut and it will be pinned only if the
// user approves that.
ShortcutsManager.Instance.RequestPinShortcut(shortcut, intent);