I uninstalled my application as much as possible to find this problem. Still appears:
11-12 15:56:27.908 I/MonoDroid(17629): System.NullReferenceException: Object reference not set to an instance of an object. 11-12 15:56:27.908 I/MonoDroid(17629): at Xamarin.Forms.Platform.Android.AppCompat.Platform.LayoutRootPage (Xamarin.Forms.Page page, System.Int32 width, System.Int32 height) [0x0005d] in C:\BuildAgent2\work\aad494dc9bc9783\Xamarin.Forms.Platform.Android\AppCompat\Platform.cs:279 11-12 15:56:27.908 I/MonoDroid(17629): at Xamarin.Forms.Platform.Android.AppCompat.Platform.Xamarin.Forms.Platform.Android.IPlatformLayout.OnLayout (System.Boolean changed, System.Int32 l, System.Int32 t, System.Int32 r, System.Int32 b) [0x00003] in C:\BuildAgent2\work\aad494dc9bc9783\Xamarin.Forms.Platform.Android\AppCompat\Platform.cs:196 11-12 15:56:27.908 I/MonoDroid(17629): at Xamarin.Forms.Platform.Android.PlatformRenderer.OnLayout (System.Boolean changed, System.Int32 l, System.Int32 t, System.Int32 r, System.Int32 b) [0x0000e] in C:\BuildAgent2\work\aad494dc9bc9783\Xamarin.Forms.Platform.Android\PlatformRenderer.cs:73 11-12 15:56:27.908 I/MonoDroid(17629): at Android.Views.ViewGroup.n_OnLayout_ZIIII (System.IntPtr jnienv, System.IntPtr native__this, System.Boolean changed, System.Int32 l, System.Int32 t, System.Int32 r, System.Int32 b) [0x00009] in /Users/builder/data/lanes/3511/ce955cc0/source/monodroid/src/Mono.Android/platforms/android-23/src/generated/Android.Views.ViewGroup.cs:3427 11-12 15:56:27.908 I/MonoDroid(17629): at (wrapper dynamic-method) System.Object:784a0fc1-dc7c-42ec-831f-0701fd382e8e (intptr,intptr,bool,int,int,int,int) 11-12 15:56:27.925 W/art (17629): JNI RegisterNativeMethods: attempt to register 0 native methods for android.runtime.JavaProxyThrowable
This is my activity on Android.
[Activity(Label = "Bol",Icon = "@drawable/icon",MainLauncher = true,Theme = "@style/MyTheme.Splash", NoHistory = true)] public class MainActivity : FormsAppCompatActivity
For the splash screen, I have the following values /styles.xml
<resources> <style name="MyTheme.Splash" parent ="Theme.AppCompat.Light.NoActionBar"> <item name="android:windowBackground">@drawable/splash_screen</item> <item name="android:windowNoTitle">true</item> <item name="android:windowActionBar">false</item> <item name="android:windowFullscreen">true</item> <item name="android:actionBarSize">0dp</item> </style> </resources>
And drawable / splash_screen.xml
<?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item> <color android:color="#000000"/> </item> <item> <bitmap android:src="@drawable/icon" android:tileMode="disabled" android:gravity="center"/> </item> </layer-list>
And the Xamarin (Prism) app
public class App : PrismApplication { public App(IPlatformInitializer initializer = null) : base(initializer) { } protected override void OnInitialized() { Logger = Container.Resolve(typeof(ILogger), null, new CompositeResolverOverride()) as ILoggerFacade; var navigationPage = "NavigationPage/MainMenu"; NavigationService.NavigateAsync(navigationPage); } }
MainMenu is just empty content.
I don’t see any hint that leads with NullReference during Xamarin.Forms.Platform.Android.AppCompat.Platform.LayoutRootPage