RecyclerView Crashing - Android Codelab

Question

I was running through an Android Codelab but it keeps crashing. Could anyone help me with why?

Below is a copy of the error logs, and more than happy to posta ny of the other elements to understand that situation.

Failed to measure fs-verity, errno 25: /data/app/~~3X-J2HR2s4vvUVvcwC0e4Q==/com.example.test-a_LLNNa-RIZlAk8hi-Qpcg==/base.apk 2023-08-10 10:56:38.699 25500-25500 AndroidRuntime pid-25500 E FATAL EXCEPTION: main Process: com.example.test, PID: 25500 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test/com.example.test.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4169) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4325) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2574) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loopOnce(Looper.java:226) at android.os.Looper.loop(Looper.java:313) at android.app.ActivityThread.main(ActivityThread.java:8757) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:571) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067) Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor(AppCompatDelegateImpl.java:926) at androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor(AppCompatDelegateImpl.java:889) at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:772) at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:197) at com.example.test.MainActivity.onCreate(MainActivity.kt:13) at android.app.Activity.performCreate(Activity.java:8591) at android.app.Activity.performCreate(Activity.java:8570) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1384) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4150) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4325) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2574) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loopOnce(Looper.java:226) at android.os.Looper.loop(Looper.java:313) at android.app.ActivityThread.main(ActivityThread.java:8757) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:571) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067) 2023-08-10 11:44:33.708 10493-10493 AndroidRuntime pid-10493 E FATAL EXCEPTION: main Process: com.example.test, PID: 10493 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test/com.example.test.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4169) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4325) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2574) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loopOnce(Looper.java:226) at android.os.Looper.loop(Looper.java:313) at android.app.ActivityThread.main(ActivityThread.java:8757) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:571) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067) Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor(AppCompatDelegateImpl.java:926) at androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor(AppCompatDelegateImpl.java:889) at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:772) at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:197) at com.example.test.MainActivity.onCreate(MainActivity.kt:13) at android.app.Activity.performCreate(Activity.java:8591) at android.app.Activity.performCreate(Activity.java:8570) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1384) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4150) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4325) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2574) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loopOnce(Looper.java:226) at android.os.Looper.loop(Looper.java:313) at android.app.ActivityThread.main(ActivityThread.java:8757) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:571) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067) --------- beginning of main

Code from Layout

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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"
    tools:context=".drink_list_1920" >

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/DrinkRecyclerView"
            android:layout_width="280dp"
            android:layout_height="729dp"
            android:layout_marginTop="16dp"
            android:layout_marginBottom="16dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    </androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>



Main code 


import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
import androidx.recyclerview.widget.RecyclerView
import com.example.speakeasy.data.Drinksource

class DrinkList1920 : Fragment() {

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.fragment_drink_list_1920, container, false)


    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        val myDrink = Drinksource().loadDrinks()

        val recyclerView = view.findViewById<RecyclerView>(R.id.DrinkRecyclerView)



    }
}

score 0 · Answer 1 · answered Aug 10 '23 at 13:29

Notice that one of the first lines in your stack trace states that:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test/com.example.test.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.

Since you have not added code in your question, it is hard to discern from where exactly it is coming from, so I can only offer guesses:

Inside your AndroidManifest.xml file, the activity in question has a wrong theme

<activity android:theme="@android:style/ThEME_EXAMPLE" >

Maybe try replacing it with this:

<activity android:theme="@style/Theme.AppCompat.Light">

Your activity is not subclassing the correct type of Android activity (you should be using Activity)

There could be other possible origins of this issue, but without seeing the code in question, it is quite hard to pinpoint the problem.

Hope this helps.

@Ashley - If my answer helped you, please mark it as such. – tomerpacific Aug 14 '23 at 13:42 — tomerpacific, Aug 14 '23 at 13:42
Thanks for responding! I have added more information above! – Ashley Aug 14 '23 at 13:51 — Ashley, Aug 14 '23 at 13:51
@Ashley - Please add the AndroidManifest.xml file. – tomerpacific Aug 14 '23 at 14:23 — tomerpacific, Aug 14 '23 at 14:23

RecyclerView Crashing - Android Codelab

1 Answers1