Error inflating class androidx.constraintlayout.ConstraintLayout after migration to androidx

Question

I just made a migration to androidx through Android Studio menu option Refactor -> Refactor to AndroidX

I\'m getting the following

Answer 1

Make sure to change to

<androidx.constraintlayout.widget.ConstraintLayout

instead of

<android.support.constraint.ConstraintLayout

and

<androidx.constraintlayout.widget.Barrier

instead of

<android.support.constraint.Barrier

Answer 2

Add androidx.constraintlayout.widget.ConstraintLayout to the dependencies:

dependencies  {
    // https://mvnrepository.com/artifact/androidx.constraintlayout/constraintlayout
    implementation "androidx.constraintlayout:constraintlayout:1.1.3"
}

It's available on mavenCentral().

Answer 3

After clicking on Refactor -> Migrate to AndroidX , Make sure your all dependencies in the build.gradle(Module:app) is marked to the newest version.

If its not, dependency will appear in yellow highlighted color and you can change it by hovering the mouse over it.

Secondly, Change the ConstraintLayout tag in all XML layout files to

androidx.constraintlayout.widget.ConstraintLayout

For more safer option, clean your project and sync it again after the above steps.

Answer 4

I had this issue with Android Studio 4.0. I used android studio 4.0 for a couple of days without problems. Seemingly out of nowhere the designer view stopped working. I could only fix this by uninstalling android studio and installing the newest android studio version.

Answer 5

make sure your project migrate to androidx completely , In my case I found :

<android.support.constraint.ConstraintLayout

instead of

  <androidx.constraintlayout.widget.ConstraintLayout

So change it and my problem fixed!

Answer 6

I had a similar error.

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myapp/com.myapp.MainActivity}: android.view.InflateException: Binary XML file line #2: Binary XML file line #2: Error inflating class androidx.constraintlayout.widget.ConstraintLayout
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2757)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2818)
        at android.app.ActivityThread.-wrap12(ActivityThread.java)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1557)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:163)
        at android.app.ActivityThread.main(ActivityThread.java:6393)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:933)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
    Caused by: android.view.InflateException: Binary XML file line #2: Binary XML file line #2: Error inflating class androidx.constraintlayout.widget.ConstraintLayout
    Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class androidx.constraintlayout.widget.ConstraintLayout
    Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Constructor.newInstance0(Native Method)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:430)
        at android.view.LayoutInflater.createView(LayoutInflater.java:652)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:812)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:752)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:499)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:430)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:377)
        at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
        at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
        at com.myapp.MainActivity.onCreate(MainActivity.java:23)
        at android.app.Activity.performCreate(Activity.java:6858)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2710)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2818)
        at android.app.ActivityThread.-wrap12(ActivityThread.java)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1557)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:163)
        at android.app.ActivityThread.main(ActivityThread.java:6393)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:933)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
    Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Landroidx/constraintlayout/widget/R$styleable;
        at androidx.constraintlayout.widget.ConstraintLayout.init(ConstraintLayout.java:590)
        at androidx.constraintlayout.widget.ConstraintLayout.<init>(ConstraintLayout.java:567)
        ... 23 more
    Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.constraintlayout.widget.R$styleable" on path: DexPathList[[zip file "/data/app/com.myapp-1/base.apk"],nativeLibraryDirectories=[/data/app/com.myapp-1/lib/arm64, /system/lib64, /vendor/lib64]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        ... 25

Following the recomendations:

add androidx.constraintlayout.ConstraintLayout to the dependencies:

dependencies  {
    implementation "androidx.constraintlayout:constraintlayout:1.1.3"
}

And the repository mavenCentral().

Works for me. I could compile the APK.