# TileOverlay crash while loading **URL:** \ **Category:** Android\ **Created:** [April 10, 2023, 2:28pm UTC](https://community.thinkgeo.com/t/tileoverlay-crash-while-loading/10326 "2023-04-10T14:28:59Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Thenishreddy](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/t/e99b99/32.png) [@Thenishreddy](https://community.thinkgeo.com/u/Thenishreddy)\ **Post date:** [April 10, 2023, 2:28pm UTC](https://community.thinkgeo.com/t/tileoverlay-crash-while-loading/10326/1 "2023-04-10T14:28:59Z")
Hi, I am facing issue where sometimes when I launch the application map tries to load and throws the exception when loading google map overlay TileOverlay+\<\>c\_DisplayClass58\_0.b\_0() Java.Lang.IllegalArgumentException: Cannot add a null child view to a ViewGroup how to handle it since this error crashes my application. I am using Xamarin forms and this is happening on android platform Thanks ---
**Author:** ![ThinkGeo\_Products](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/t/6de8d8/32.png) [@ThinkGeo\_Products](https://community.thinkgeo.com/u/ThinkGeo_Products)\ **Post date:** [April 10, 2023, 7:23pm UTC](https://community.thinkgeo.com/t/tileoverlay-crash-while-loading/10326/2 "2023-04-10T19:23:56Z")
Hi @Thenishreddy, I’ve never received this error in the past. Are you getting this error on the ‘HowDoI’ samples, or a custom application that you’re working on? Also, can you send us the full stack trace of the exception? Thanks, John ---
**Author:** ![Thenishreddy](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/t/e99b99/32.png) [@Thenishreddy](https://community.thinkgeo.com/u/Thenishreddy)\ **Post date:** [April 11, 2023, 7:58am UTC](https://community.thinkgeo.com/t/tileoverlay-crash-while-loading/10326/3 "2023-04-11T07:58:50Z")
Getting it on custom application here is the full stack trace Xamarin Exception Stack: Java.Lang.IllegalArgumentException: Cannot add a null child view to a ViewGroup at Java.Interop.JniEnvironment+InstanceMethods.CallNonvirtualVoidMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue\* args) [0x0008e] in :0 at Java.Interop.JniPeerMembers+JniInstanceMethods.InvokeVirtualVoidMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue\* parameters) [0x00076] in :0 at Android.Views.ViewGroup.AddView (Android.Views.View child) [0x00031] in \<8638e88f61db46e4bc35e66b77e3b3e8\>:0 at ThinkGeo.UI.Android.TileOverlay+\<\>c\_\_DisplayClass58\_0.b\_\_0 () [0x000ee] in :0 at Java.Lang.Thread+RunnableImplementor.Run () [0x00008] in \<8638e88f61db46e4bc35e66b77e3b3e8\>:0 at Java.Lang.IRunnableInvoker.n\_Run (System.IntPtr jnienv, System.IntPtr native\_\_this) [0x00008] in \<8638e88f61db46e4bc35e66b77e3b3e8\>:0 at Android.Runtime.JNINativeWrapper.Wrap\_JniMarshal\_PP\_V (\_JniMarshal\_PP\_V callback, System.IntPtr jnienv, System.IntPtr klazz) [0x00005] in \<8638e88f61db46e4bc35e66b77e3b3e8\>:0 at java.lang.IllegalArgumentException: Cannot add a null child view to a ViewGroup at android.view.ViewGroup.addView(ViewGroup.java:4431) at android.view.ViewGroup.addView(ViewGroup.java:4413) at mono.java.lang.RunnableImplementor.n\_run(Native Method) at mono.java.lang.RunnableImplementor.run(RunnableImplementor.java:31) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6780) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1500) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1390) Thread 3399: 0 java.lang.Object.wait(Object.java:-2) 1 java.lang.Daemons$ReferenceQueueDaemon.run(Daemons.java:150) 2 java.lang.Thread.run(Thread.java:762) Thread 3400: 0 java.lang.Object.wait(Object.java:-2) 1 java.lang.Object.wait(Object.java:407) 2 java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:188) 3 java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:209) 4 java.lang.Daemons$FinalizerDaemon.run(Daemons.java:204) 5 java.lang.Thread.run(Thread.java:762) Thread 3401: 0 java.lang.Thread.sleep(Thread.java:-2) 1 java.lang.Thread.sleep(Thread.java:371) 2 java.lang.Thread.sleep(Thread.java:313) 3 java.lang.Daemons$FinalizerWatchdogDaemon.sleepFor(Daemons.java:314) 4 java.lang.Daemons$FinalizerWatchdogDaemon.waitForFinalization(Daemons.java:336) 5 java.lang.Daemons$FinalizerWatchdogDaemon.run(Daemons.java:253) 6 java.lang.Thread.run(Thread.java:762) Thread 3402: 0 dalvik.system.VMRuntime.runHeapTasks(VMRuntime.java:-2) 1 java.lang.Daemons$HeapTaskDaemon.run(Daemons.java:433) 2 java.lang.Thread.run(Thread.java:762) Thread 3413: 0 android.os.MessageQueue.nativePollOnce(MessageQueue.java:-2) 1 android.os.MessageQueue.next(MessageQueue.java:323) 2 android.os.Looper.loop(Looper.java:136) 3 android.os.HandlerThread.run(HandlerThread.java:61) Thread 3415: 0 java.lang.Object.wait(Object.java:-2) 1 java.lang.Thread.parkFor$(Thread.java:2128) 2 sun.misc.Unsafe.park(Unsafe.java:325) 3 java.util.concurrent.locks.LockSupport.park(LockSupport.java:161) 4 java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2035) 5 java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:413) 6 java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1058) 7 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1118) 8 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) 9 java.lang.Thread.run(Thread.java:762) Thread 3416: 0 android.os.MessageQueue.nativePollOnce(MessageQueue.java:-2) 1 android.os.MessageQueue.next(MessageQueue.java:323) 2 android.os.Looper.loop(Looper.java:136) 3 android.os.HandlerThread.run(HandlerThread.java:61) Thread 3417: 0 java.lang.Object.wait(Object.java:-2) 1 java.lang.Thread.parkFor$(Thread.java:2128) 2 sun.misc.Unsafe.park(Unsafe.java:325) 3 java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:201) 4 java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2077) 5 java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:438) 6 java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1057) 7 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1118) 8 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) 9 java.lang.Thread.run(Thread.java:762) Thread 3418: 0 java.lang.Object.wait(Object.java:-2) 1 java.lang.Thread.parkFor$(Thread.java:2128) 2 sun.misc.Unsafe.park(Unsafe.java:325) 3 java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:201) 4 java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2077) 5 java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:438) 6 java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1057) 7 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1118) 8 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) 9 java.lang.Thread.run(Thread.java:762) Thread 3421: 0 java.lang.Object.wait(Object.java:-2) 1 java.lang.Thread.parkFor$(Thread.java:2128) 2 sun.misc.Unsafe.park(Unsafe.java:325) 3 java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:201) 4 java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2077) 5 java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:438) 6 java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1057) 7 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1118) 8 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) 9 java.lang.Thread.run(Thread.java:762) Thread 3422: 0 java.lang.Object.wait(Object.java:-2) 1 com.android.okhttp.okio.AsyncTimeout.awaitTimeout(AsyncTimeout.java:323) 2 com.android.okhttp.okio.AsyncTimeout.-wrap0(AsyncTimeout.java:-1) 3 com.android.okhttp.okio.AsyncTimeout$Watchdog.run(AsyncTimeout.java:286) Thread 3425: 0 java.lang.Object.wait(Object.java:-2) 1 com.android.okhttp.ConnectionPool.performCleanup(ConnectionPool.java:319) 2 com.android.okhttp.ConnectionPool.runCleanupUntilPoolIsEmpty(ConnectionPool.java:256) 3 com.android.okhttp.ConnectionPool.-wrap0(ConnectionPool.java:-1) 4 com.android.okhttp.ConnectionPool$1.run(ConnectionPool.java:102) 5 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133) 6 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) 7 java.lang.Thread.run(Thread.java:762) Thread 3427: 0 java.lang.Object.wait(Object.java:-2) 1 java.lang.Thread.parkFor$(Thread.java:2128) 2 sun.misc.Unsafe.park(Unsafe.java:325) 3 java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:201) 4 java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2077) 5 java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:438) 6 java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1057) 7 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1118) 8 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) 9 java.lang.Thread.run(Thread.java:762) ---
**Author:** ![ThinkGeo\_Products](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/t/6de8d8/32.png) [@ThinkGeo\_Products](https://community.thinkgeo.com/u/ThinkGeo_Products)\ **Post date:** [April 11, 2023, 8:36pm UTC](https://community.thinkgeo.com/t/tileoverlay-crash-while-loading/10326/4 "2023-04-11T20:36:12Z")
Thanks for the details, @Thenishreddy. I’ve been unable to recreate the issue. Are you able to create a very simple sample that exhibits the error and upload the solution as a .zip file attachment to this post? Thanks, John