Fragment testing error: android.view.InflateException: Binary XML file line #16: Binary XML file line #16: Error inflating class

Question

I am trying to test a fragment, following these instructions: https://developer.android.com/training/basics/fragments/testing

However I am getting the following crash when calling launchFragmentInContainer from my test.

Stacktrace:

android.view.InflateException: Binary XML file line #16: Binary XML file line #16: Error inflating class <unknown>

Caused by: android.view.InflateException: Binary XML file line #16: Error inflating class <unknown>
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
...
at android.view.LayoutInflater.$$robo$$android_view_LayoutInflater$createView(LayoutInflater.java:647)
...
at com.myapp.poll.PollHomeFragment.onCreateView(PollHomeFragment.kt:31)
...
Caused by: java.lang.UnsupportedOperationException: Failed to resolve attribute at index 13: TypedValue{t=0x2/d=0x7f0301b1 a=-1}
at android.content.res.TypedArray.getDrawableForDensity(TypedArray.java:946)
at android.content.res.TypedArray.getDrawable(TypedArray.java:930)
at android.view.View.__constructor__(View.java:5010)
at android.view.View.<init>(View.java)
at android.widget.TextView.<init>(TextView.java)
...
at com.myapp.poll.PollHomeFragment.onCreateView(PollHomeFragment.kt:31)

Here's the layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
tools:context=".poll.PollActivity">

<TextView
    android:id="@+id/tvEmail"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    tools:text="asdf@asdf.com" />

<TextView                      <!-- This is line 16 -->
    android:id="@+id/tvViewPoll"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?attr/selectableItemBackground"
    android:gravity="center"
    android:minHeight="48dp"
    android:text="View Poll" />

<TextView
    android:id="@+id/tvCreatePoll"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?attr/selectableItemBackground"
    android:gravity="center"
    android:minHeight="48dp"
    android:text="Create Poll" />

Post your test class code, Check the id of Textview is it initialised in activity or not. — Rahul Khatri, Nov 18 '19 at 12:35

tenprint · Accepted Answer · 2019-11-20T16:13:50.137

OK, from an educated guess based on the stacktrace, I tried removing android:background="?attr/selectableItemBackground" and this resolves the issue.

It appears that ?attr/selectableItemBackground is perhaps not compatible with FragmentScenario or this is a framework bug.

I submitted a bug on the issue tracker: https://issuetracker.google.com/issues/144629519

Update from Google:

Status: Won't Fix (Intended Behavior) The default theme does not have an app defined attribute ?attr/selectableItemBackground (as Fragment has no dependency on AppCompat, MDC, etc)

It sounds like you should be passing the correct theme to FragmentScenario:
launchFragmentInContainer<PollHomeFragment>(themeResId = R.style.Theme_YourTheme)

score 2 · Answer 2 · answered Feb 06 '21 at 11:34

In Java one also has to pass the theme to the FragmentScenario. Else the Fragment will not know about the current theme and will eventually complain that one should set an AppCompat theme ...

FragmentScenario<SomeFragment> scenario = FragmentScenario.launchInContainer(
    SomeFragment.class,
    Bundle.EMPTY,
    R.style.Theme_Custom,
    null
);

score 0 · Answer 3 · answered Jul 29 '21 at 08:37

0

For me, using "android:?attr/selectableItemBackground" instead, solved the problem

answered Jul 29 '21 at 08:37

Hanoch Moreno

593
7
9

1

Are you only confirming the answer by JP Lipata oder trying to make an additional contribution? You will have to explain - or delete this post please. – Yunnosch Jul 29 '21 at 08:41

Fragment testing error: android.view.InflateException: Binary XML file line #16: Binary XML file line #16: Error inflating class

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