Instant APP InflateException

Question

When running my Instant App, I get the following inflateException:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xfzj.instantappdemo/com.xfzj.instantappdemo.feature.MainActivity}: android.view.InflateException: Binary XML file line #10: Binary XML file line #10: Error inflating class android.support.design.widget.AppBarLayout
                                                                             at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
                                                                             at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
                                                                             at android.app.ActivityThread.-wrap11(ActivityThread.java)
                                                                             at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
                                                                             at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                             at android.os.Looper.loop(Looper.java:148)
                                                                             at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                                             at java.lang.reflect.Method.invoke(Native Method)
                                                                             at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                                             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                                                                          Caused by: android.view.InflateException: Binary XML file line #10: Binary XML file line #10: Error inflating class android.support.design.widget.AppBarLayout
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
                                                                             at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:292)
                                                                             at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
                                                                             at com.xfzj.instantappdemo.feature.MainActivity.onCreate(MainActivity.java:17)
                                                                             at android.app.Activity.performCreate(Activity.java:6237)
                                                                             at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
</pre>

Here is my layout.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    tools:context="com.xfzj.instantappdemo2.feature.MainActivity">

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/AppTheme.AppBarOverlay">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay" />

</android.support.design.widget.AppBarLayout>

<include layout="@layout/content_main" />

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|end"
    android:layout_margin="@dimen/fab_margin"
    app:srcCompat="@android:drawable/ic_dialog_email" />
</LinearLayout>

Here is my feature module build.gradle file:

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    implementation project(':base')
    implementation 'com.android.support:appcompat-v7:25.4.0'
    testImplementation 'junit:junit:4.12'
    implementation 'com.android.support:design:25.4.0'
}

If I run the installed app it succeeds.

Is com.android.support:design:25.4.0 not compatible with instant app?

Answer 1

com.android.support:design:25.4.0 is supported by Instant Apps. The issue is duplicate dependencies on the appcompat and design support libraries between the feature modules. Typically since these libraries are common across features, they will be included in the base feature module's build.gradle file (example from Android Studio building a default Instant App project):

dependencies {
    application project(':app')
    feature project(':feature')
    api 'com.android.support:appcompat-v7:25.4.0'
    api 'com.android.support.constraint:constraint-layout:1.0.2'
    api 'com.android.support:design:25.4.0'
}

Since other feature modules have a dependency on the base feature module, they should not include these libraries themselves. The feature module's build.gradle just needs to include:

dependencies {
    ...
    implementation project(':base')
    ...
 }

In other words, all libraries defined in the base feature module are available to the other features and they should not be re-added as a dependency.