Required XML attribute "adUnitId" was missing.

[Bikash Malo]

When I install my Android apps, after installing, the banner ad does not appear where it is supposed to appear. This message appears. What is the solution for this?

Required XML attribute "adUnitId" was missing.



Hear is my coad:


<?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:id="@+id/main_constraint_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#E8E8E8"
    tools:context=".MainActivity">

    <!-- প্রধান তাসবীহ কাউন্টার এলাকা -->
    <LinearLayout
        android:id="@+id/linearLayoutCounterArea"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="20dp"
        android:gravity="center_horizontal"
        android:background="@android:color/white"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:elevation="4dp">

        <TextView
            android:id="@+id/textViewTasbeehName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/no_tasbeeh_selected"
            android:textSize="22sp"
            android:textColor="?attr/colorPrimaryDark"
            android:layout_marginBottom="6dp"
            tools:text="সুবহানাল্লাহ"/>

        <TextView
            android:id="@+id/textViewCount"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="0"
            android:textSize="72sp"
            android:textColor="@android:color/black"
            android:textStyle="bold"
            tools:text="1024"/>

        <TextView
            android:id="@+id/textViewTargetCountMain"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text=""
            android:textSize="16sp"
            android:textColor="@android:color/darker_gray"
            android:layout_marginTop="4dp"
            android:visibility="gone"
            tools:text="/ 33"
            tools:visibility="visible"/>

    </LinearLayout>

    <!-- Tap বাটন -->
    <Button
        android:id="@+id/buttonCount"
        android:layout_width="160dp"
        android:layout_height="160dp"
        android:text="TAP"
        android:textSize="26sp"
        android:textStyle="bold"
        android:background="@drawable/circle_button_background"
        android:textColor="@android:color/white"
        app:layout_constraintTop_toBottomOf="@id/linearLayoutCounterArea"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:layout_marginTop="24dp"
        android:elevation="6dp"/>

    <!-- সেভ করা তাসবীহগুলোর জন্য একটি হেডার -->
    <TextView
        android:id="@+id/textViewSavedTasbeehsHeader"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="সেভ করা তাসবীহসমূহ"
        android:textSize="16sp"
        android:textStyle="bold"
        android:textColor="@android:color/black"
        app:layout_constraintTop_toBottomOf="@id/buttonCount"
        app:layout_constraintStart_toStartOf="parent"
        android:layout_marginTop="28dp"
        android:layout_marginStart="16dp"/>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerViewTasbeehs"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginTop="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        app:layout_constraintTop_toBottomOf="@+id/textViewSavedTasbeehsHeader"
        app:layout_constraintBottom_toTopOf="@+id/fabAddNewTasbeeh"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        tools:listitem="@layout/tasbeeh_list_item" />

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fabAddNewTasbeeh"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="16dp"
        android:layout_marginBottom="16dp"
        android:src="@android:drawable/ic_input_add"
        app:tint="@android:color/white"
        android:contentDescription="@string/add_new_tasbeeh"
        app:layout_constraintBottom_toTopOf="@+id/adViewContainer"
        app:layout_constraintEnd_toEndOf="parent" />

    <!-- AdView এর জন্য একটি কন্টেইনার, যাতে ব্যানার লোড না হলে জায়গা না নেয় -->
    <FrameLayout
        android:id="@+id/adViewContainer"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent">

        <com.google.android.gms.ads.AdView
            xmlns:ads="http://schemas.android.com/apk/res-auto"
            android:id="@+id/adView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            ads:adSize="BANNER"
            android:visibility="gone"
            tools:visibility="visible" /> <!-- Design time এ দেখার জন্য visible, runtime এ gone থাকবে প্রথমে -->
    </FrameLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

[Mobile Ads SDK Forum Advisor]

Hi,

Thank you for contacting the Mobile Ads SDK Support team. 

The error message you're seeing, "Required XML attribute 'adUnitId' was missing," means that the AdView element in your layout XML file requires the adUnitId attribute to properly load and display the ad.

You need to provide a valid ad unit ID that is associated with your AdMob account. A unique ID number assigned to each of your ad units when they're created in AdMob. The ad unit ID is added to your app's code and used to identify ad requests from the ad unit.

Kindly use the below code: 

<com.google.android.gms.ads.AdView
    xmlns:ads="http://schemas.android.com/apk/res-auto

"
    android:id="@+id/adView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    ads:adSize="BANNER"
    ads:adUnitId="YOUR_AD_UNIT_ID_HERE"
    android:visibility="gone"
    tools:visibility="visible" /> 

Kindly replace "YOUR_AD_UNIT_ID_HERE" with your actual ad unit ID.

I hope this helps! Let me know if you have any other questions.

Thanks,
 

Mobile Ads SDK Team

Feedback
How was our support today?

               
[2025-07-01 05:50:11Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01rgo6b:ref" (ADR-00316562)