Android studio error on logcat Attribute "xmlns:card_view" was already specified for element "android.support.v7.widget.CardView"

Question

I'm getting the following error on LogCat when I try to build and run the app. In my app I've used Cardview to display the edittext and textview. When I try to run the app, it shows me the following error:

Attribute "xmlns:card_view" was already specified for element "android.support.v7.widget.CardView".

It's only displaying this information and it's not even showing me the exact location where the problem is.

Here's the XML which contains the CardView:

activity_basic_info:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.v7.widget.Toolbar
            android:layout_width="match_parent"
            android:layout_height="@dimen/_46sdp">


            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">


                <ImageView
                    android:layout_width="@dimen/_30sdp"
                    android:layout_height="@dimen/_30sdp"
                    android:layout_marginTop="@dimen/_8sdp"
                    android:src="@drawable/ic_arrow_back_black_24dp"/>




                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textColor="@android:color/white"
                    android:textStyle="bold"
                    android:layout_centerInParent="true"
                    android:textSize="@dimen/_16sdp"
                    android:text="@string/basic_info_header"/>

            </RelativeLayout>



        </android.support.v7.widget.Toolbar>


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

    <android.support.v4.widget.NestedScrollView
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        android:layout_width="match_parent"
        android:background="@android:color/white"
        android:layout_height="match_parent">



        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@android:color/white"
            android:orientation="vertical">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@android:color/white"
                android:orientation="horizontal">

                <ImageView
                    android:layout_width="@dimen/_25sdp"
                    android:layout_height="@dimen/_25sdp"
                    android:layout_marginTop="@dimen/_30sdp"
                    android:src="@drawable/contact_info"
                    android:layout_marginStart="@dimen/_40sdp"/>


                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginHorizontal="@dimen/_8sdp"
                    android:layout_marginTop="@dimen/_34sdp"
                    android:text="@string/contact_info_text"
                    android:textStyle="bold"
                    android:textColor="@color/textColor"
                    android:textSize="@dimen/_12sdp"/>
            </LinearLayout>




            <android.support.v7.widget.CardView

                android:id="@+id/cardView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="@dimen/_25sdp"
                android:layout_marginEnd="@dimen/_25sdp"
                android:layout_marginTop="@dimen/_25sdp"
                app:cardCornerRadius="@dimen/_10sdp"
                app:cardElevation="@dimen/_10sdp">

                <LinearLayout

                    android:background="@drawable/bg_layout"
                    android:layout_width="match_parent"
                    android:paddingBottom="@dimen/_2sdp"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:orientation="vertical">



                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content">

                    <TextView
                        android:layout_width="0dp"
                        android:layout_height="wrap_content"
                        android:layout_weight="1"
                        android:paddingBottom="@dimen/_15sdp"
                        android:paddingTop="@dimen/_15sdp"
                        android:paddingEnd="@dimen/_10sdp"
                        android:gravity="end"
                        android:textColor="@android:color/white"
                        android:background="@color/colorPrimary"
                        android:text="Name"/>


                        <EditText
                            android:layout_width="0dp"
                            android:layout_height="wrap_content"
                            android:layout_weight="2"
                            android:paddingTop="@dimen/_15sdp"
                            android:paddingStart="@dimen/_10sdp"
                            android:paddingBottom="@dimen/_15sdp"
                            android:background="@android:color/transparent"
                            android:hint="First and Last name"
                            android:textSize="@dimen/_10sdp"/>

                    </LinearLayout>
                    <View
                        android:layout_width="match_parent"
                        android:layout_height="1dp"
                        android:background="#e2e2e2" />



                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content">

                        <TextView
                            android:layout_width="0dp"
                            android:layout_height="wrap_content"
                            android:layout_weight="1"
                            android:paddingBottom="@dimen/_15sdp"
                            android:paddingTop="@dimen/_15sdp"
                            android:paddingEnd="@dimen/_10sdp"
                            android:gravity="end"
                            android:textColor="@android:color/white"
                            android:background="@color/colorPrimary"
                            android:text="Email"/>


                        <EditText
                            android:layout_width="0dp"
                            android:layout_height="wrap_content"
                            android:layout_weight="2"
                            android:paddingTop="@dimen/_15sdp"
                            android:paddingStart="@dimen/_10sdp"
                            android:paddingBottom="@dimen/_15sdp"
                            android:background="@android:color/transparent"
                            android:hint="Email Address"
                            android:textSize="@dimen/_10sdp"/>

                    </LinearLayout>


                    <View
                        android:layout_width="match_parent"
                        android:layout_height="1dp"
                        android:background="#e2e2e2" />


                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content">

                        <TextView
                            android:layout_width="0dp"
                            android:layout_height="wrap_content"
                            android:layout_weight="1"
                            android:paddingBottom="@dimen/_15sdp"
                            android:paddingTop="@dimen/_15sdp"
                            android:paddingEnd="@dimen/_10sdp"
                            android:gravity="end"
                            android:textColor="@android:color/white"
                            android:background="@color/colorPrimary"
                            android:text="Phone"/>


                        <EditText
                            android:layout_width="0dp"
                            android:layout_height="wrap_content"
                            android:layout_weight="2"
                            android:paddingTop="@dimen/_15sdp"
                            android:paddingStart="@dimen/_10sdp"
                            android:paddingBottom="@dimen/_15sdp"
                            android:background="@android:color/transparent"
                            android:hint="Phone Number"
                            android:textSize="@dimen/_10sdp"/>

                    </LinearLayout>


                </LinearLayout>

            </android.support.v7.widget.CardView>


            <View
                android:layout_width="match_parent"
                android:layout_height="@dimen/_1sdp"
                android:layout_marginTop="@dimen/_20sdp"
                android:layout_marginStart="@dimen/_20sdp"
                android:layout_marginEnd="@dimen/_20sdp"
                android:background="#bababa"/>


        </LinearLayout>


    </android.support.v4.widget.NestedScrollView>


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

My build.gradle :

apply plugin: 'com.android.application'

android {
    dataBinding
            {
                enabled = true
            }

    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.newproject"
        minSdkVersion 22
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    //noinspection GradleCompatible
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.android.support:support-vector-drawable:28.0.0'
    //noinspection GradleDependency
    implementation 'com.android.support:support-v4:28.0.0-alpha1'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    //rest services
    implementation 'com.squareup.retrofit2:adapter-rxjava2:2.5.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.5.0'
    implementation 'com.squareup.retrofit2:converter-scalars:2.5.0'
    //design
    implementation 'com.android.support:cardview-v7:28.0.0'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    //image binding
    implementation 'com.squareup.picasso:picasso:2.71828'
    //design libraries
    implementation 'com.android.support:design:28.0.0'
    //reactive programming
    implementation 'io.reactivex.rxjava2:rxandroid:2.0.2'
    implementation 'io.reactivex.rxjava2:rxjava:2.1.12'
    //data binding
    implementation 'android.arch.lifecycle:extensions:1.1.1'
    implementation 'android.arch.lifecycle:livedata:1.1.1'
    annotationProcessor 'android.arch.lifecycle:compiler:1.1.1'
    implementation 'android.arch.lifecycle:viewmodel:1.1.1'
    //sdp library
    implementation 'com.intuit.sdp:sdp-android:1.0.3'
    implementation 'com.android.support:design:28.0.0'
    //circle image Viewer
    implementation 'de.hdodenhof:circleimageview:3.0.0'

}

I have already tried:

Clean Project
Rebuild Project
Invalidate caches and restarted the android studio.

But nothing worked out.

check this post https://stackoverflow.com/questions/24455867/error-when-adding-cardview-to-layout — Shahbaz Ali, Feb 21 '19 at 13:43
Possible duplicate of [Error when adding CardView to layout](https://stackoverflow.com/questions/24455867/error-when-adding-cardview-to-layout) — kAliert, Feb 21 '19 at 13:44

score 3 · Answer 1 · answered Mar 10 '22 at 21:47

3

I ran into a similar issue. To fix it, I just removed the layout_width and layout_height of the global layout of my xml file.

answered Mar 10 '22 at 21:47

CTremblay

31
2

1

Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Mar 11 '22 at 02:48

score 0 · Answer 2 · answered Nov 25 '22 at 02:57

0

It means tags is already defined in parent which you are using again in child.

answered Nov 25 '22 at 02:57

the PIYUSH RAI

1
1

As it’s currently written, your answer is unclear. Please [edit] to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Nov 28 '22 at 11:20

Android studio error on logcat Attribute "xmlns:card_view" was already specified for element "android.support.v7.widget.CardView"

2 Answers2