I am getting an error:No enum constant com.android.manifmerger.AttributeOperationType.CONTEXT. when I am trying to use ConstraintLayout

enter image description here

Here is my xml file:

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">


    <EditText
        android:id="@ id/inputFirstName"
        android:layout_width="398dp"
        android:layout_height="47dp"
        android:layout_margin="10dp"
        android:layout_marginEnd="188dp"
        android:layout_marginBottom="21dp"
        android:hint="Enter your first name"
        android:minHeight="48dp"
        app:layout_constraintBottom_toTopOf="@ id/inputLastName"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.848" />

    <EditText
        android:id="@ id/inputLastName"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="135dp"
        android:hint="Enter your last name"
        android:minHeight="48dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@ id/btnUploadData"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginHorizontal="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="56dp"
        android:layout_marginEnd="8dp"
        android:text="@string/save_data"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@ id/inputLastName" />

    <Button
        android:id="@ id/btnReadData"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="44dp"
        android:layout_marginEnd="8dp"
        android:text="@string/retrieve_data"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@ id/btnUploadData"
        app:layout_constraintVertical_bias="0.0" />

    <TextView
        android:id="@ id/textViewResultTitle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:layout_marginStart="104dp"
        android:layout_marginTop="43dp"
        android:text="FireStore data :"
        android:textSize="24sp"
        android:textStyle="bold"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@ id/btnReadData" />

    <TextView
        android:id="@ id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="48dp"
        android:text=""
        android:textSize="16sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@ id/textViewResultTitle"
        app:layout_constraintVertical_bias="0.081" />


    </androidx.constraintlayout.widget.ConstraintLayout>

When I tried to use ConstraintLayout I deleted a and put instead

This is what I found on the forums. It didn't work so I decided to return and put in it "androidx.constraintlayout.widget.ConstraintLayout" but it also gave me an error. So I don't know how to fix it. Maybe it is because of that my xml file is in the manifest folder: enter image description here Here is my dependencies in build.gradle (:app):

build.gradle (:app) File

plugins {
    id 'com.android.application'
    id 'org.jetbrains.kotlin.android'
    id 'com.google.gms.google-services'
}

android {
    namespace 'com.example.myapplication'
    compileSdk 32

    defaultConfig {
        applicationId "com.example.myapplication"
        minSdk 19
        targetSdk 32
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = '1.8'
    }

    buildFeatures {
        viewBinding true
    }
}


dependencies {
    implementation 'androidx.core:core-ktx:1.7.0'
    implementation 'androidx.appcompat:appcompat:1.5.1'
    implementation 'com.google.android.material:material:1.7.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    implementation platform('com.google.firebase:firebase-bom:31.1.0')
    implementation 'com.google.firebase:firebase-analytics-ktx'
    implementation 'com.google.firebase:firebase-firestore-ktx:24.1.0'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
    // To use constraintlayout in compose
    implementation("androidx.constraintlayout:constraintlayout-compose:1.0.1")
}

CodePudding user response：

According to your screenshot, you've replaced your AndroidManifest.xml's contents with layout XML. That file is extremely important and you'll get all kinds of errors if you try to build without a valid one!

You need to revert it and then create a layout file (in the res/layout folder) for the layout XML you're trying to use