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When setting the Application.Current.MainPage to a new ContentPage on Android it just shows an empty screen. The same behaviour is working fine on iOS.
Steps to reproduce:
1: Open a ContentPage with a button in the App.cs as MainPage;
2: When pressing the button, init a new ContentPage and set it to Application.Current.MainPage
From here you'll see a blank screen.
Application on GitHub to reproduce: https://github.com/App-Artment/xamarin-forms-tests
I have checked this issue and observed that on running the android app, it loads the first screen properly with a label 'Xamarin Forms Tests' and a button 'Tap here to start' and when we click on button 'Tap here to start' it shows an empty screen (black screen), however for iOS this is working fine and loads the next screen properly with a menu item.
Screencast : http://www.screencast.com/t/D3pH0EKS
Application Output : https://gist.github.com/Udham1/fbd0c60eaea55a24bc92
Environment Info :
Xamarin.Forms : 18.104.22.16875-pre1
=== Xamarin Studio ===
Version 5.5.4 (build 15)
Installation UUID: ce927b2a-2c07-44c5-b186-09cfdafba6dc
Mono 3.10.0 ((detached/92c4884)
GTK+ 2.24.23 (Raleigh theme)
Package version: 310000031
=== Xamarin.Android ===
Version: 22.214.171.124 (Enterprise Edition)
Android SDK: /Users/xamarin76/Desktop/android-sdk-macosx
Supported Android versions:
1.6 (API level 4)
2.1 (API level 7)
2.2 (API level 8)
2.3 (API level 10)
3.0 (API level 11)
3.1 (API level 12)
3.2 (API level 13)
4.0 (API level 14)
4.0.3 (API level 15)
4.1 (API level 16)
4.2 (API level 17)
4.3 (API level 18)
4.4 (API level 19)
4.4.87 (API level 20)
5.0 (API level 21)
Java SDK: /usr
java version "1.7.0_65"
Java(TM) SE Runtime Environment (build 1.7.0_65-b17)
Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode)
=== Apple Developer Tools ===
Xcode 6.1 (6602)
=== Xamarin.Mac ===
Version: 126.96.36.199 (Enterprise Edition)
=== Xamarin.iOS ===
Version: 188.8.131.52 (Enterprise Edition)
Build date: 2014-11-16 21:03:22-0500
=== Build Information ===
Release ID: 505040015
Git revision: f93940a35458a18052f1a25e106e62ca970d9c40
Build date: 2014-11-19 15:32:41-05
Xamarin addins: dc23cbd91a3a0e1d326328e1229e86c942a49ec8
=== Operating System ===
Mac OS X 10.9.4
Darwin Xamarin76s-Mac-mini.local 13.3.0 Darwin Kernel Version 13.3.0
Tue Jun 3 21:27:35 PDT 2014
Created attachment 8873 [details]
Additional test case
I'll attach a second simple test case here, just in case it might come in handy to have a project stored directly in Bugzilla.
This test case initially sets `Application.MainPage` to a `ContentPage` containing a "Main Page" label and a "Go to page 2" button. Tapping the button sets `Application.MainPage` to a new `ContentPage` that contains a "Second Page" label.
Regression status: new feature in 1.3.0
## Steps to reproduce
1. Build and run the attached test case on an Android device or emulator.
2. Tap the "Go to page 2" button.
The screen switches to an empty display.
## Expected result
If you run the iOS or Windows Phone projects from the test case and tap the "Go to page 2" button, a new screen appears that shows the label "Second Page".
## Version information
Xamarin 184.108.40.206 (10cfd178d55287f09c85f5a1e604dfe20889a40f)
Xamarin.Android 220.127.116.11 (ba9bbbdd44cfdc4bf485e8885bd2ad24fba525f7)
Xamarin.iOS 18.104.22.168 (840a925103a0bf4a856507f13d5eaee3c1579c2f)
Microsoft Visual Studio Professional 2013
Version 12.0.30723.00 Update 3
Microsoft .NET Framework
NuGet Package Manager 2.8.50926.663
Fixed in next release
I have checked this issue with Xamarin.Forms Version 22.214.171.12425-pre1 and observed that now this is working fine. Hence I am closing this issue.
Please refer the screencast : http://www.screencast.com/t/KFzAV4lMIm4
Environment Info :
Xamarin.Forms : 126.96.36.19925-pre1
Mac OS X 10.9.5
Xamarin Studio 5.7.1 (build 17)
Mono 3.12.0 ((detached/a813491)
GTK+ 2.24.23 (Raleigh theme)
Xcode 6.2 (6770)
Xamarin.iOS 188.8.131.52 (Business Edition)
Xamarin.Android 184.108.40.206 (Business Edition)