Xamarin designer crashes on Android API v19
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I've created a brand new blank Android project and I'm attempting to modify the Main.axml file. I haven't added or changed anything yet, but for some reason when I target Android 4.2.2 (API v19) the designer crashes with the following error:
java.lang.NullPointerException
at mono.android.DesignerException.fromThrowable(DesignerException.java:30)
at mono.android.DesignerSession.checkRenderResultForError(DesignerSession.java:177)
at mono.android.DesignerSession.load(DesignerSession.java:228)
at mono.android.DesignerSession.processMessage(DesignerSession.java:693)
at mono.android.MessageListener.executeMessage(MessageListener.java:88)
at mono.android.MessageListener$Runner.run(MessageListener.java:44)
at java.lang.Thread.run(Thread.java:745)
Designer works with latest API, but not for Android 4.2.2. Any ideas?
Posts
Looks like I have the same issue here:
mono.android.DesignerException
at mono.android.DesignerException.fromThrowable(DesignerException.java:43)
at mono.android.DesignerSession.checkRenderResultForError(DesignerSession.java:177)
at mono.android.DesignerSession.load(DesignerSession.java:228)
at mono.android.DesignerSession.processMessage(DesignerSession.java:693)
at mono.android.MessageListener.executeMessage(MessageListener.java:88)
at mono.android.MessageListener$Runner.run(MessageListener.java:44)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
at android.content.res.Resources_Delegate.disposeSystem(Resources_Delegate.java:83)
at com.android.layoutlib.bridge.android.BridgeContext.disposeResources(BridgeContext.java:242)
at com.android.layoutlib.bridge.impl.RenderAction.tearDown(RenderAction.java:257)
at com.android.layoutlib.bridge.impl.RenderAction.release(RenderAction.java:220)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:438)
at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:389)
at mono.android.DesignerSession.load(DesignerSession.java:222)
... 4 more
This is the case since I upgraded to VS2017 and with that to Xamarin 4.4.0.34.
Before that every thing was fine. Unfortunately I don't know exactly which my elder Xamarin version was.
Encountering the exact same issue! The exact same error message even:
java.lang.NullPointerException
at mono.android.DesignerException.fromThrowable(DesignerException.java:30)
at mono.android.DesignerSession.checkRenderResultForError(DesignerSession.java:177)
at mono.android.DesignerSession.load(DesignerSession.java:228)
at mono.android.DesignerSession.processMessage(DesignerSession.java:693)
at mono.android.MessageListener.executeMessage(MessageListener.java:88)
at mono.android.MessageListener$Runner.run(MessageListener.java:44)
at java.lang.Thread.run(Thread.java:745)
Same here. I got the released update yesterday and today I get
java.lang.NullPointerException
at mono.android.DesignerException.fromThrowable(DesignerException.java:30)
at mono.android.DesignerSession.checkRenderResultForError(DesignerSession.java:177)
at mono.android.DesignerSession.load(DesignerSession.java:228)
at mono.android.DesignerSession.processMessage(DesignerSession.java:693)
at mono.android.MessageListener.executeMessage(MessageListener.java:88)
at mono.android.MessageListener$Runner.run(MessageListener.java:44)
at java.lang.Thread.run(Thread.java:745)
I hate updates. Over 50% of the time I end up with issues like this.
I love Xamarin, but hate dealing with the updates.
Changed the compile API from 19 to 20 and now it previews. Don't know that it will work on KitKat after this, or if I can just change it back to compile at 19, but need to work with it in 20 for the designer to work.
https://forums.xamarin.com/discussion/92892/designer-suddenly-stops-working-for-one-project