tytd-mobile/TYTD.Mobile/MainActivity.cs

using System;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using AndroidX.AppCompat.App;
using AndroidX.AppCompat.Widget;
using AndroidX.Core.View;
using AndroidX.DrawerLayout.Widget;
using Google.Android.Material.FloatingActionButton;
using Google.Android.Material.Navigation;
using Google.Android.Material.Snackbar;
using Tesses.YouTubeDownloader;
using Tesses.YouTubeDownloader.Droid;
using Toolbar = AndroidX.AppCompat.Widget.Toolbar;

namespace TYTD.Mobile
{
    [Activity(Label = "@string/app_name", Theme = "@style/AppTheme.NoActionBar", MainLauncher = true)]
    public class MainActivity : AppCompatActivity, NavigationView.IOnNavigationItemSelectedListener
    {
        
        protected override void OnCreate(Bundle? savedInstanceState)
        {
    
            
            base.OnCreate(savedInstanceState);
            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
            SetContentView(Resource.Layout.activity_main);
            TYTDCommon.MainActivity = typeof(MainActivity);
            TYTDCommon.SettingsActivity = typeof(PrefenceActivity);
            TYTDCommon.Init(this);

             Toolbar? toolbar = FindViewById<Toolbar>(Resource.Id.toolbar);
	    if(toolbar != null)
            SetSupportActionBar(toolbar);

            FloatingActionButton? fab = FindViewById<FloatingActionButton>(Resource.Id.fab);
	
	    if(fab != null)
            fab.Click += FabOnClick;

            DrawerLayout? drawer = FindViewById<DrawerLayout>(Resource.Id.drawer_layout);
	    if(drawer != null)
	    {
            	ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, Resource.String.navigation_drawer_open, Resource.String.navigation_drawer_close);
            	drawer.AddDrawerListener(toggle);
            	toggle.SyncState();
	    }

            NavigationView? navigationView = FindViewById<NavigationView>(Resource.Id.nav_view);
	    if(navigationView != null)
            navigationView.SetNavigationItemSelectedListener(this);

            TYTDCommon.StartBootCache<ProgressDialog>(()=>{
                var dlg=new ProgressDialog(this);
                dlg.SetTitle("TYTD Cache");
                dlg.SetMessage("Please wait, caching");
                dlg.Show();
                return dlg;
            },(e)=>{
                this.RunOnUiThread(()=>{
                    e.Dismiss();
                });
            });
        }

        public override void OnBackPressed()
        {
            DrawerLayout? drawer = FindViewById<DrawerLayout>(Resource.Id.drawer_layout);
            if (drawer != null && drawer.IsDrawerOpen(GravityCompat.Start))
            {
                drawer.CloseDrawer(GravityCompat.Start);
            }
            else
            {
                base.OnBackPressed();
            }
        }

        public override bool OnCreateOptionsMenu(IMenu? menu)
        {
            MenuInflater.Inflate(Resource.Menu.menu_main, menu);
            return true;
        }

        public override bool OnOptionsItemSelected(IMenuItem item)
        {
            int id = item.ItemId;
            if (id == Resource.Id.action_settings)
            {
                Intent intent=new Intent(this,typeof(PrefenceActivity));
                StartActivity(intent);
                return true;
            }
            if(id == Resource.Id.action_servers)
            {
                Intent servers=new Intent(this,typeof(ServersActivity));
                StartActivity(servers);
                return true;
            }

            return base.OnOptionsItemSelected(item);
        }

        private void FabOnClick(object? sender, EventArgs eventArgs)
        {
          /*  View? view = (View?)sender;
	    if(view != null)
            Snackbar.Make(view, "Replace with your own action", Snackbar.LengthLong)
                .SetAction("Action",(e)=>{}).Show();*/
            
            var builder=new AndroidX.AppCompat.App.AlertDialog.Builder(this);
            builder.SetView(Resource.Layout.add_item);
            builder.SetTitle(Resource.String.add_item_text);
            EditText? video_id = null; //you would put https://www.youtube.com/watch?v=PzUKeGZiEl0 in here
            builder.SetNegativeButton(Resource.String.cancel_text,(sender0,e)=>{

            });
            builder.SetPositiveButton(Resource.String.add_text,(sender0,e)=>{
                if(video_id!= null)
                {
                    string? id=video_id.Text;
                    if(TYTDCommon.TYTD != null && !string.IsNullOrWhiteSpace(id))
                    {
                        Task.Factory.StartNew(async()=>{
                           await TYTDCommon.TYTD.CastIfAsync<ITYTDBase,IDownloader>(async (e2)=>{
                            await e2.AddItemAsync(id,Resolution.PreMuxed);
                            
                        });
                        }).Wait(0);
                    }
                }
            });
            var res=builder.Show();
            if(res!= null)
            {
                video_id=res.FindViewById<EditText>(Resource.Id.video_url);
            }
        }

        public bool OnNavigationItemSelected(IMenuItem item)
        {
            int id = item.ItemId;

            if (id == Resource.Id.nav_camera)
            {
                // Handle the camera action
            }
            else if (id == Resource.Id.nav_gallery)
            {

            }
            else if (id == Resource.Id.nav_slideshow)
            {

            }
            else if (id == Resource.Id.nav_manage)
            {

            }
            else if (id == Resource.Id.nav_share)
            {

            }
            else if (id == Resource.Id.nav_send)
            {

            }

            DrawerLayout? drawer = FindViewById<DrawerLayout>(Resource.Id.drawer_layout);
	    if(drawer != null)
            drawer.CloseDrawer(GravityCompat.Start);
            return true;
        }
        public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
        {
            Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);

            base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }
}