Xamarin.Forms content not showing after using Acticity.SetContentView - android-layout

Question

After using Android layout this.SetContentView(Resource.Layout.Main), and LoadApplication(new App()), I could not see Xamarin.Forms MainPage.xaml. I tried to remove the Linear Layout, but it just removing items inside them, not the form itself. It seems like SetContentView blocking the Xamarin.Forms. So,
Here is MainActivity.cs:
using Android.App;
using Android.Content;
using Android.Content.PM;
using Android.OS;
using Android.Text.Method;
using Android.Widget;
using Auth0.OidcClient;
using IdentityModel.OidcClient;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Xamarin.Forms;
namespace IndoFellowship.Droid {
// Define App icon and name
[Activity(
Label = "Indo App",
MainLauncher = true,
Icon = "#drawable/icon",
LaunchMode = LaunchMode.SingleTask)
]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsApplicationActivity {
protected override void OnCreate(Bundle bundle) {
base.OnCreate(bundle);
global::Xamarin.Forms.Forms.Init(this, bundle);
// Showing layout that I set
SetContentView(Resource.Layout.Main);
// Do login
// Some codes
// Done processing on Android, I need to load Xamarin.Forms
LinearLayout mainLayout = (LinearLayout)FindViewById(Resource.Id.mainLayoutID);
mainLayout.RemoveAllViews();
// Load App
LoadApplication(new App());
}
}
}
Main.axml on Resources/values/
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/mainLayoutID"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
// Some layout here..
</LinearLayout>
and my App.xaml.cs (Xamarin)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Xamarin.Forms;
namespace IndoFellowship {
public partial class App : Application {
public static string AppName { get; set; }
public App() {
InitializeComponent();
MainPage = new NavigationPage(new MainPage());
}
protected override void OnStart() {
// Handle when your app starts
}
protected override void OnSleep() {
// Handle when your app sleeps
}
protected override void OnResume() {
// Handle when your app resumes
}
}
}
MainPage.xaml.cs (Xamarin)
using Auth0.OidcClient;
using IdentityModel.OidcClient;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Xamarin.Auth;
using Xamarin.Forms;
namespace IndoFellowship
{
public partial class MainPage : ContentPage {
public MainPage()
{
InitializeComponent();
var browser = new WebView();
browser.Source = "http://xamarin.com";
Content = browser;
}
}
}
Over here I should seeing xamarin.com webView, but my Android just went blank. It seems like Xamarin.Forms not showing at all and I am still on Xamarin.Android. If I took SetContentView, I can see the forms rendered perfectly, but I could not process what I need to do on Android.
What I need to do to properly load Xamarin Forms from MainActivity?
Why layout not removed?
Thank you.

Answer 1

I found my solution by using StartActivity instead of LoadApplication.
By creating a second activity:
XamarinForms.cs this activity load the app()
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
namespace IndoFellowship.Droid {
[Activity(Label = "XamarinForm")]
public class XamarinForm : Xamarin.Forms.Platform.Android.FormsApplicationActivity {
protected override void OnCreate(Bundle bundle) {
base.OnCreate(bundle);
Xamarin.Forms.Forms.Init(this, bundle);
LoadApplication(new App());
}
}
}
MainActivity.cs instead of LoadApplication here, I am calling the second activity instead
using Android.App;
using Android.Content;
using Android.Content.PM;
using Android.OS;
using Android.Text.Method;
using Android.Widget;
using Auth0.OidcClient;
using IdentityModel.OidcClient;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Xamarin.Forms;
namespace IndoFellowship.Droid {
// Define App icon and name
[Activity(
Label = "Indo App",
MainLauncher = true,
Icon = "#drawable/icon",
LaunchMode = LaunchMode.SingleTask)
]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsApplicationActivity {
protected override void OnCreate(Bundle bundle) {
base.OnCreate(bundle);
global::Xamarin.Forms.Forms.Init(this, bundle);
// Showing layout that I set
SetContentView(Resource.Layout.Main);
// Do login
// Some codes
// Done processing on Android, I need to load Xamarin.Forms
LinearLayout mainLayout = (LinearLayout)FindViewById(Resource.Id.mainLayoutID);
mainLayout.RemoveAllViews();
// Load App
StartActivity(typeof(XamarinForms));
}
}
}
May be this is not a best design since now I have two activities. Please let me know if you know better way to accomplish this. Thank you.