Toast throws ArrayIndexOutOfBoundsException with appcompat v26 when using fontFamily attribute in theme

Question

Whenever I show a Toast, the app crashes.

The app works fine if I use older version of AppCompat library or remove fontFamily from the style.

onCreate:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toast.makeText(this, "Test", Toast.LENGTH_SHORT).show(); //line 13
}

Dependency:

compile 'com.android.support:appcompat-v7:26.1.0'

AppTheme:

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="android:fontFamily">sans-serif-light</item>
</style>

Stack Trace:

Caused by: java.lang.ArrayIndexOutOfBoundsException: length=16; index=233 at android.content.res.StringBlock.get(StringBlock.java:65) at android.content.res.XmlBlock$Parser.getPooledString(XmlBlock.java:458) at android.content.res.TypedArray.loadStringValueAt(TypedArray.java:1212) at android.content.res.TypedArray.getString(TypedArray.java:202) at android.support.v7.widget.TintTypedArray.getString(TintTypedArray.java:143) at android.support.v7.widget.AppCompatTextHelper.updateTypefaceAndStyle(AppCompatTextHelper.java:215) at android.support.v7.widget.AppCompatTextHelper.loadFromAttributes(AppCompatTextHelper.java:152) at android.support.v7.widget.AppCompatTextHelperV17.loadFromAttributes(AppCompatTextHelperV17.java:38) at android.support.v7.widget.AppCompatTextView.(AppCompatTextView.java:81) at android.support.v7.widget.AppCompatTextView.(AppCompatTextView.java:71) at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:103) at android.support.v7.app.AppCompatDelegateImplV9.createView(AppCompatDelegateImplV9.java:1024) at android.support.v7.app.AppCompatDelegateImplV9.onCreateView(AppCompatDelegateImplV9.java:1081) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:769) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727) at android.view.LayoutInflater.rInflate(LayoutInflater.java:858) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821) at android.view.LayoutInflater.inflate(LayoutInflater.java:518) at android.view.LayoutInflater.inflate(LayoutInflater.java:426) at android.view.LayoutInflater.inflate(LayoutInflater.java:377) at android.widget.Toast.makeText(Toast.java:266) at io.yarsa.blankapp.MainActivity.onCreate(MainActivity.java:13) at android.app.Activity.performCreate(Activity.java:6679) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726) at android.app.ActivityThread.-wrap12(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6126) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

Is there any alternative so that I can use the fontFamily attribute in theme using the latest version of AppCompat library?

Answer 1

Add font in Theme like below-

    <style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">
        <item name="android:textViewStyle">@style/TextViewStyle</item>
        <item name="android:buttonStyle">@style/ButtonStyle</item>
    </style>

    <style name="TextViewStyle" parent="android:Widget.TextView">
        <item name="android:fontFamily">sans-serif-light</item>
    </style>

    <style name="ButtonStyle" parent="Widget.AppCompat.Button">
        <item name="android:fontFamily">sans-serif-light</item>
    </style>

Answer 2

According to the Android Developer Guide for fonts in xml

Adding fonts to style

Open the styles.xml, and set the fontFamily attribute to the font file you want to access.

<style name="customfontstyle" parent="@android:style/TextAppearance.Small">
    <item name="android:fontFamily">@font/lobster</item> 
</style>

In your case you should put the @font/ prefix

<item name="android:fontFamily">@font/sans-serif-light</item>