Error Inflating Class <unknown>

Nathan Sokalski 4,116

When running my app, I receive the following message:

Java.Lang.RuntimeException

Binary XML file line #1 in com.companyname.illusionexperimental:layout/activity_main: Binary XML file line #1 in com.companyname.illusionexperimental:layout/experimentallayout: Error inflating class <unknown>

experimentallayout is an XML layout file included in activity_main as follows:

<include android:visibility="visible" android:id="@+id/incExperimentalLayout" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_column="0" android:layout_row="0" layout="@layout/experimentallayout"/>

Both activity_main and ExperimentalLayout.xml have the following as line #1 (the line stated in the error message):

<?xml version="1.0" encoding="utf-8"?>

The Designer in Visual Studio 2022 displays the files without any problem, and compiles without any problem. How can I determine what the problem is?

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 35,021 Reputation points Microsoft Vendor

2023-02-27T06:28:54.49+00:00
I've tested the exact same page configuration as you in a new project and this error doesn't happen.

In general, this problem can be caused by the following reasons:

Layout id conflicts.

There are properties in the layout file that are not configured correctly.

There is a problem with the resource file (such as the picture is too large).

For further investigation, could you please provide more detailed information, such as steps to reproduce the problem or minimize the code example?