Enabling R8 causes "android.view.InflateException Error inflating class TextView" in TextView with fontFamily

Question

I'm trying to shrink/obfuscate my release build with R8 (AS 3.3) but it's crashing trying to inflate an XML file, specifically on a TextView with a fontFamily. Removing the fontFamily attribute fixes the issue.

XML file:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/blue_linear_gradient"
    tools:context=".login.LoginFragment">

    <ImageView
        android:id="@+id/familyIcon"
        android:layout_width="90dp"
        android:layout_height="90dp"
        android:layout_marginTop="32dp"
        app:srcCompat="@drawable/auth_login_icon"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView   <!-- This is line 20 -->
        android:id="@+id/title"
        android:layout_width="180dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="8dp"
        android:lineHeight="24dp"
        android:maxWidth="168dp"
        android:text="@string/login_title"
        android:textAlignment="center"
        android:fontFamily="@font/gotham_bold" <!-- Removing this line fixes it -->
        android:textColor="@color/kineduWhite"
        android:textSize="20sp"
        app:layout_constraintBottom_toTopOf="@+id/authForm"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/familyIcon" />

    <include
        android:id="@+id/authForm"
        layout="@layout/auth_form"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="16dp"
        android:layout_marginBottom="8dp"
        android:maxWidth="324dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/familyIcon" />

    <!-- More views... -->

</androidx.constraintlayout.widget.ConstraintLayout>

This is the stacktrace:

2019-01-17 17:37:26.496 24514-24514/? E/AndroidRuntime: FATAL EXCEPTION: main
    android.view.InflateException: Binary XML file line #20: Binary XML file line #20: Error inflating class TextView
    Caused by: android.view.InflateException: Binary XML file line #20: Error inflating class TextView
    Caused by: java.lang.NullPointerException: Attempt to read from field 'long android.content.res.XmlBlock$Parser.mParseState' on a null object reference
        at android.content.res.XmlBlock$Parser.getAttributeListValue(XmlBlock.java:320)
        at androidx.core.content.res.FontResourcesParserCompat.androidx.core.content.res.FontResourcesParserCompat$FamilyResourceEntry parse(org.xmlpull.v1.XmlPullParser,android.content.res.Resources)(SourceFile:1)
        at androidx.core.content.res.ResourcesCompat.android.graphics.Typeface loadFont(android.content.Context,android.content.res.Resources,android.util.TypedValue,int,int,androidx.core.content.res.ResourcesCompat$FontCallback,android.os.Handler,boolean)(SourceFile:14)
        at androidx.core.content.res.ResourcesCompat.android.graphics.Typeface loadFont(android.content.Context,int,android.util.TypedValue,int,androidx.core.content.res.ResourcesCompat$FontCallback,android.os.Handler,boolean)(SourceFile:3)
        at androidx.core.content.res.ResourcesCompat.android.graphics.Typeface getFont(android.content.Context,int,android.util.TypedValue,int,androidx.core.content.res.ResourcesCompat$FontCallback)(SourceFile:8)
        at androidx.appcompat.widget.TintTypedArray.android.graphics.Typeface getFont(int,int,androidx.core.content.res.ResourcesCompat$FontCallback)(SourceFile:8)
        at androidx.appcompat.widget.AppCompatTextHelper.void updateTypefaceAndStyle(android.content.Context,androidx.appcompat.widget.TintTypedArray)(SourceFile:102)
        at androidx.appcompat.widget.AppCompatTextHelper.void loadFromAttributes(android.util.AttributeSet,int)(SourceFile:59)
        at androidx.appcompat.widget.AppCompatTextView.void <init>(android.content.Context,android.util.AttributeSet,int)(SourceFile:7)
        at androidx.appcompat.widget.AppCompatTextView.void <init>(android.content.Context,android.util.AttributeSet)(SourceFile:2)
        at androidx.appcompat.app.AppCompatViewInflater.androidx.appcompat.widget.AppCompatTextView createTextView(android.content.Context,android.util.AttributeSet)(SourceFile:1)
        at androidx.appcompat.app.AppCompatViewInflater.android.view.View createView(android.view.View,java.lang.String,android.content.Context,android.util.AttributeSet,boolean,boolean,boolean,boolean)(SourceFile:30)
        at androidx.appcompat.app.AppCompatDelegateImpl.void onSubDecorInstalled(android.view.ViewGroup)(SourceFile:89)
                                                        android.view.View createView(android.view.View,java.lang.String,android.content.Context,android.util.AttributeSet)
        at androidx.appcompat.app.AppCompatDelegateImpl.android.view.View onCreateView(android.view.View,java.lang.String,android.content.Context,android.util.AttributeSet)(SourceFile:1)
        at android.view.LayoutInflater$FactoryMerger.onCreateView(LayoutInflater.java:189)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:772)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at com.company.auth.login.LoginFragment.android.view.View onCreateView(android.view.LayoutInflater,android.view.ViewGroup,android.os.Bundle)(SourceFile:7)

My font lives in a separate library module.

Font family xml file "res/font/gotham-bold.xml" in :core

<font-family xmlns:app="http://schemas.android.com/apk/res-auto">
    <font
        app:fontStyle="normal"
        app:fontWeight="400"
        app:font="@font/gotham_rnd_bold"/>

    <font
        app:fontStyle="italic"
        app:fontWeight="400"
        app:font="@font/gotham_rnd_bold_italic"/>
</font-family>

And the actual font "gotham_rnd_bold.otf" is also in this :core module under "res/font/

Try to file an issue at https://issuetracker.google.com, using 'Shrinker (R8)' as component name — shadowsheep, Jan 18 '19 at 16:23
Hi! I see you have filed this [issue](https://issuetracker.google.com/issues/123054725). I'll post it here for reference. — shadowsheep, Jan 21 '19 at 15:01

shadowsheep · Accepted Answer · 2019-01-23T14:33:19.723

I post here the reason why provided by R8 developers (from your issue) for better indexing and reference.

This happens because you are including program classes in your app that is already in the Android framework. The Proguard configuration rule -dontwarn org.xmlpull.v1.** explicitly disables these warnings from the compiler.

Ideally, you should not include any classes in your app that is also in the Android framework. You should be able to identify the dependency that includes org.xmlpull.* and then exclude that module from the dependency. It seems that others have successfully done this, see for example https://stackoverflow.com/a/34486112. If you manage to do this, then you shouldn't get any warnings even if you remove the rule -dontwarn org.xmlpull.v1.**.

Alternatively, you can use the rule -keep class org.xmlpull.** { *;}. This trick appears to be used by others (https://github.com/search?q=org.xmlpull.v1+extension=pro&type=Code), but it can be error-prone since your version of org.xmlpull.* may be different from the one in the Android framework.

Note that we are working on changing the behavior of R8 such that it deals with duplicate classes in a way such that Android framework classes always take precedence of program classes (b/120884788). In principle, none of the above changes should be needed with that fix.

score 0 · Answer 2 · answered Jan 14 '21 at 12:19

0

You can set custom font programatically such as;

customText.typeface = ResourcesCompat.getFont(this, 
R.font.your_font)

answered Jan 14 '21 at 12:19

Ahmet B.

1,290
10
20

Enabling R8 causes "android.view.InflateException Error inflating class TextView" in TextView with fontFamily

2 Answers2