Xamarin.Forms [Bug] Java.Lang.NullPointerException: 'Attempt to invoke virtual method 'boolean android.view.View.isLayoutDirectionInherited()' on a null object reference'

Description

Hi team,

we have facing the same kind of issue, in the OnMeasure Method

Java.Lang.NullPointerException: 'Attempt to invoke virtual method 'boolean android.view.View.isLayoutDirectionInherited()' on a null object reference'

call stack Unhandled exception - Java.Lang.NullPointerException: Attempt to read from field 'int android.view.View.mViewFlags' on a null object reference

--- End of managed Java.Lang.NullPointerException stack trace ---

java.lang.NullPointerException: Attempt to read from field 'int android.view.View.mViewFlags' on a null object reference

at android.view.ViewGroup.dispatchCollectViewAttributes(ViewGroup.java:1687)

at android.view.ViewRootImpl.collectViewAttributes(ViewRootImpl.java:2698)

at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3263)

at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:2669)

at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:10092)

at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1010)

at android.view.Choreographer.doCallbacks(Choreographer.java:809)

at android.view.Choreographer.doFrame(Choreographer.java:744)

at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:995)

at android.os.Handler.handleCallback(Handler.java:938)

at android.os.Handler.dispatchMessage(Handler.java:99)

at android.os.Looper.loop(Looper.java:247)

at android.app.ActivityThread.main(ActivityThread.java:8656)

at java.lang.reflect.Method.invoke(Native Method)

at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130).

could you please provide the solution to resolve the issue

Expected Behavior

Actual Behavior

Basic Information

Version with issue: issue reproduce in android platform xamarin form version: 4.5.0.617

Environment

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Build Logs

Screenshots

Reproduction Link

Workaround

Jan 10 '22 05:01 saiganesh-sakthivel

Could you attach a small sample where reproduce the issue?

Jan 10 '22 06:01 jsuarezruiz

Hi @jsuarezruiz,

Currently, we are creating a simple sample to replicate the issue. Once, we have prepared the sample. we will update the task.

Regards, SaiGanesh Sakthivel

Jan 10 '22 12:01 saiganesh-sakthivel

Hi @jsuarezruiz,

We are using the custom renderer in our sample. The reported crash occurs randomly. It is hard to replicate in a simple sample. could you please share the possible null check to overcome the reported crash?

Regards, SaiGanesh Sakthivel

Feb 07 '22 12:02 saiganesh-sakthivel

This is also happening for us. It is a hard crash and cannot use try catch to overcome this. I have just 1 available report. Cannot replicate the issue. Android 11, realme 8i.

com.xamarin.forms.platform.android.FormsViewGroup.measureAndLayout FormsViewGroup.java, line 36 Java.Lang.NullPointerException: Attempt to invoke virtual method 'boolean android.view.View.isLayoutDirectionInherited()' on a null object reference

    JniEnvironment+InstanceMethods.CallNonvirtualVoidMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args)
    JniPeerMembers+JniInstanceMethods.InvokeVirtualVoidMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters)
    FormsViewGroup.MeasureAndLayout (System.Int32 widthMeasureSpec, System.Int32 heightMeasureSpec, System.Int32 l, System.Int32 t, System.Int32 r, System.Int32 b)
    VisualElementTracker.UpdateLayout ()
    VisualElementRenderer`1[TElement].UpdateLayout ()
    VisualElementRenderer`1[TElement].UpdateLayout (System.Collections.Generic.IEnumerable`1[T] children)
    VisualElementRenderer`1[TElement].OnLayout (System.Boolean changed, System.Int32 l, System.Int32 t, System.Int32 r, System.Int32 b)
    PageRenderer.OnLayout (System.Boolean changed, System.Int32 l, System.Int32 t, System.Int32 r, System.Int32 b)
    FormsViewGroup.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)
    JNINativeWrapper.Wrap_JniMarshal_PPZIIII_V (_JniMarshal_PPZIIII_V callback, System.IntPtr jnienv, System.IntPtr klazz, System.Boolean p0, System.Int32 p1, System.Int32 p2, System.Int32 p3, System.Int32 p4)
    java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.view.View.isLayoutDirectionInherited()' on a null object reference
    android.view.ViewGroup.resolveDrawables ViewGroup.java:7939
    android.view.ViewGroup.resolveDrawables ViewGroup.java:7940
    android.view.ViewGroup.resolveDrawables ViewGroup.java:7940
    android.view.ViewGroup.resolveDrawables ViewGroup.java:7940
    android.view.ViewGroup.resolveDrawables ViewGroup.java:7940
    android.view.ViewGroup.resolveDrawables ViewGroup.java:7940
    android.view.ViewGroup.resolveDrawables ViewGroup.java:7940
    android.view.View.resolveRtlPropertiesIfNeeded View.java:20294
    android.view.ViewGroup.resolveRtlPropertiesIfNeeded ViewGroup.java:7846
    android.view.View.measure View.java:25959
    com.xamarin.forms.platform.android.FormsViewGroup.measureAndLayout FormsViewGroup.java:36
    crc643f46942d9dd1fff9.PageRenderer.n_onLayout(Native Method)
    crc643f46942d9dd1fff9.PageRenderer.onLayout PageRenderer.java:72
    android.view.View.layout View.java:23310
    android.view.ViewGroup.layout ViewGroup.java:6539
    com.xamarin.forms.platform.android.FormsViewGroup.measureAndLayout FormsViewGroup.java:37
    crc64720bb2db43a66fe9.NavigationPageRenderer.n_onLayout(Native Method)
    crc64720bb2db43a66fe9.NavigationPageRenderer.onLayout NavigationPageRenderer.java:65
    android.view.View.layout View.java:23310
    android.view.ViewGroup.layout ViewGroup.java:6539
    com.xamarin.forms.platform.android.FormsViewGroup.measureAndLayout FormsViewGroup.java:37
    crc643f46942d9dd1fff9.PlatformRenderer.n_onLayout(Native Method)
    crc643f46942d9dd1fff9.PlatformRenderer.onLayout PlatformRenderer.java:55
    android.view.View.layout View.java:23310
    android.view.ViewGroup.layout ViewGroup.java:6539
    android.widget.RelativeLayout.onLayout RelativeLayout.java:1103
    android.view.View.layout View.java:23310
    android.view.ViewGroup.layout ViewGroup.java:6539
    android.widget.FrameLayout.layoutChildren FrameLayout.java:332
    android.widget.FrameLayout.onLayout FrameLayout.java:270
    android.view.View.layout View.java:23310
    android.view.ViewGroup.layout ViewGroup.java:6539
    android.widget.FrameLayout.layoutChildren FrameLayout.java:332
    android.widget.FrameLayout.onLayout FrameLayout.java:270
    android.view.View.layout View.java:23310
    android.view.ViewGroup.layout ViewGroup.java:6539
    android.widget.FrameLayout.layoutChildren FrameLayout.java:332
    android.widget.FrameLayout.onLayout FrameLayout.java:270
    android.view.View.layout View.java:23310
    android.view.ViewGroup.layout ViewGroup.java:6539
    android.widget.LinearLayout.setChildFrame LinearLayout.java:1841
    android.widget.LinearLayout.layoutVertical LinearLayout.java:1673
    android.widget.LinearLayout.onLayout LinearLayout.java:1582
    android.view.View.layout View.java:23310
    android.view.ViewGroup.layout ViewGroup.java:6539
    android.widget.FrameLayout.layoutChildren FrameLayout.java:332
    android.widget.FrameLayout.onLayout FrameLayout.java:270
    com.android.internal.policy.DecorView.onLayout DecorView.java:878
    android.view.View.layout View.java:23310
    android.view.ViewGroup.layout ViewGroup.java:6539
    android.view.ViewRootImpl.performLayout ViewRootImpl.java:3973
    android.view.ViewRootImpl.performTraversals ViewRootImpl.java:3372
    android.view.ViewRootImpl.doTraversal ViewRootImpl.java:2337
    android.view.ViewRootImpl$TraversalRunnable.run ViewRootImpl.java:9039
    android.view.Choreographer$CallbackRecord.run Choreographer.java:1179
    android.view.Choreographer.doCallbacks Choreographer.java:1002
    android.view.Choreographer.doFrame Choreographer.java:899
    android.view.Choreographer$FrameDisplayEventReceiver.run Choreographer.java:1164
    android.os.Handler.handleCallback Handler.java:938
    android.os.Handler.dispatchMessage Handler.java:99
    android.os.Looper.loop Looper.java:261
    android.app.ActivityThread.main ActivityThread.java:8314
    java.lang.reflect.Method.invoke(Native Method)
    com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run RuntimeInit.java:632
    com.android.internal.os.ZygoteInit.main ZygoteInit.java:1049

Aug 19 '22 13:08 TomasMalcanek

Getting the similar exception: Java.Lang.NullPointerException Message=Attempt to invoke virtual method 'boolean android.view.View.isInLayout()' on a null object reference. Happens when updating the following ViewModel property:

public ImageSource CoverPhotoSource { get { return _coverPhotoSource; } set { if (value != _coverPhotoSource) { _coverPhotoSource = value; OnPropertyChanged("CoverPhotoSource"); } } } private ImageSource _coverPhotoSource = null;

Bound to following XAML:

<Image x:Name="coverPhoto" Source="{Binding CoverPhotoSource}" Aspect="AspectFill" HorizontalOptions="FillAndExpand"></Image>

Dec 22 '22 19:12 KodeKreachor

Is some progress in this topic? I can say, this causes 60% of our app crashes.

Xamarin Forms 5.0.0.2515

I bring more information about the devices this is happening on. Looks like mostly it's Galaxy & Android 13 combination.

POCO X3 Pro Android 11 Galaxy S20 Android 13 Galaxy Z Fold4 Android 13 Galaxy S22+ Android 13 Galaxy Tab S7+ 5G Android 13 Galaxy A32 5G Android 13 Galaxy A52 Android 13 Galaxy A53 5G Android 13 Galaxy S21 5G Android 13 Galaxy A23 Android 13 Galaxy S20 Ultra 5G Android 13 Galaxy XCover 5 Android 13 Galaxy A52s 5G Android 13 Galaxy A22s 5G Android 13 Galaxy A72 Android 13 Galaxy A13 Android 13

Apr 20 '23 06:04 TomasMalcanek

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[Bug] Java.Lang.NullPointerException: 'Attempt to invoke virtual method 'boolean android.view.View.isLayoutDirectionInherited()' on a null object reference'

Description

Expected Behavior

Actual Behavior

Basic Information

Environment

Build Logs

Screenshots

Reproduction Link

Workaround

Xamarin.Forms
Xamarin.Forms copied to clipboard