Flutter Adding Home Screen Widgets

import 'package:home_widget/home_widget.dart';

const String appGroupId = 'group.com.example.app';
const String iOSWidgetName = 'NewsWidgets';
const String androidWidgetName = 'NewsWidget';

Future<void> updateWidgetData(String title, String description) async {
  await HomeWidget.setAppGroupId(appGroupId);
  await HomeWidget.saveWidgetData<String>('headline_title', title);
  await HomeWidget.saveWidgetData<String>('headline_description', description);
  await HomeWidget.updateWidget(
    iOSName: iOSWidgetName,
    androidName: androidWidgetName,
  );
}

import WidgetKit
import SwiftUI

struct NewsArticleEntry: TimelineEntry {
    let date: Date
    let title: String
    let description: String
}

struct Provider: TimelineProvider {
    func placeholder(in context: Context) -> NewsArticleEntry {
        NewsArticleEntry(date: Date(), title: "Loading...", description: "Loading...")
    }

    func getSnapshot(in context: Context, completion: @escaping (NewsArticleEntry) -> ()) {
        let userDefaults = UserDefaults(suiteName: "group.com.example.app")
        let title = userDefaults?.string(forKey: "headline_title") ?? "No Title"
        let description = userDefaults?.string(forKey: "headline_description") ?? "No Description"
        
        let entry = NewsArticleEntry(date: Date(), title: title, description: description)
        completion(entry)
    }

    func getTimeline(in context: Context, completion: @escaping (Timeline<Entry>) -> ()) {
        getSnapshot(in: context) { (entry) in
            let timeline = Timeline(entries: [entry], policy: .atEnd)
            completion(timeline)
        }
    }
}

struct NewsWidgetsEntryView : View {
    var entry: Provider.Entry

    var body: some View {
        VStack(alignment: .leading) {
            Text(entry.title).font(.headline)
            Text(entry.description).font(.subheadline)
        }
    }
}

package com.example.app.widgets

import android.appwidget.AppWidgetManager
import android.appwidget.AppWidgetProvider
import android.content.Context
import android.widget.RemoteViews
import es.antonborri.home_widget.HomeWidgetPlugin
import com.example.app.R

class NewsWidget : AppWidgetProvider() {
    override fun onUpdate(
        context: Context,
        appWidgetManager: AppWidgetManager,
        appWidgetIds: IntArray,
    ) {
        for (appWidgetId in appWidgetIds) {
            val widgetData = HomeWidgetPlugin.getData(context)
            val views = RemoteViews(context.packageName, R.layout.news_widget).apply {
                val title = widgetData.getString("headline_title", "No Title")
                setTextViewText(R.id.headline_title, title)

                val description = widgetData.getString("headline_description", "No Description")
                setTextViewText(R.id.headline_description, description)
            }
            appWidgetManager.updateAppWidget(appWidgetId, views)
        }
    }
}

// Add this to your SwiftUI View struct
var bundle: URL {
    let bundle = Bundle.main
    if bundle.bundleURL.pathExtension == "appex" {
        var url = bundle.bundleURL.deletingLastPathComponent().deletingLastPathComponent()
        url.append(component: "Frameworks/App.framework/flutter_assets")
        return url
    }
    return bundle.bundleURL
}

init(entry: Provider.Entry) {
    self.entry = entry
    CTFontManagerRegisterFontsForURL(
        bundle.appending(path: "/fonts/YourCustomFont.ttf") as CFURL, 
        CTFontManagerScope.process, 
        nil
    )
}