background - AAPT: error: duplicate attribute. in android

Question

 <?xml version="1.0" encoding="utf-8"?>
<layout 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">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/background_activity">
        <LinearLayout
            android:id="@+id/name_company"
            android:layout_width="match_parent"
            android:orientation="horizontal"
            android:background="@color/green"
            android:gravity="center_horizontal"
            android:layout_height="100dp">
            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginRight="50dp"
                android:layout_gravity="center_vertical"
                android:src="@drawable/back_arrow"
                android:layout_marginEnd="50dp" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="@color/white"
                android:textSize="30dp"
                android:paddingRight="50dp"
                android:layout_gravity="center_vertical"
                android:text="Summary Output 3"
                android:paddingEnd="50dp" />

        </LinearLayout>

        <LinearLayout
            android:id="@+id/signup_text_fields"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:gravity="center_vertical"
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp"
            android:layout_marginTop="40dp"
            android:layout_below="@+id/name_company">
            <RelativeLayout
                android:layout_width="match_parent"
                android:background="@drawable/background"
                android:layout_height="wrap_content">
                <TextView
                    android:text="Output 3"
                    android:textSize="20dp"
                    android:layout_margin="10dp"
                    android:layout_alignParentStart="true"
                    android:textColor="@color/white"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentLeft="true" />
                <TextView
                    android:layout_centerInParent="true"
                    android:text="Type"
                    android:textSize="20dp"
                    android:layout_margin="10dp"
                    android:textColor="@color/white"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"/>
            </RelativeLayout>
            <LinearLayout
                android:layout_width="match_parent"
                android:orientation="vertical"
                android:background="#3A3333"
                android:layout_height="1dp"/>
            <ScrollView
                android:layout_width="match_parent"
                android:background="@drawable/background"
                android:layout_marginBottom="40dp"
                android:layout_height="250dp">
                <FrameLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content">
                    <androidx.recyclerview.widget.RecyclerView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"/>
                </FrameLayout>
            </ScrollView>

            <RelativeLayout
                android:layout_width="wrap_content"
                android:background="@drawable/background"
                android:layout_height="wrap_content">
                <Spinner
                    android:id="@+id/option1"
                    android:layout_width="match_parent"
                    android:layout_height="60dp"
                    android:layout_gravity="center_vertical"
                    android:layout_marginBottom="10dp"
                    android:gravity="center_vertical"
                    android:padding="2dp"
                    android:paddingStart="10dp"
                    android:paddingLeft="10dp"
                    android:textColor="@color/white"
                    android:textSize="20dp" />
                <ImageView
                    android:layout_width="25dp"
                    android:src="@drawable/dropdown"
                    android:layout_margin="20dp"
                    android:layout_alignParentRight="true"
                    android:layout_height="25dp"
                    android:layout_alignParentEnd="true" />
            </RelativeLayout>

            <RelativeLayout
                android:layout_width="match_parent"
                android:background="@color/background_edit_text"
                android:layout_marginBottom="5dp"
                android:layout_marginTop="10dp"
                android:layout_height="wrap_content">
                <TextView
                    android:text="72.11"
                    android:textSize="20dp"
                    android:layout_margin="10dp"
                    android:layout_alignParentStart="true"
                    android:textColor="@color/orange"
                    android:layout_width="100dp"
                    android:layout_height="wrap_content"
                    android:layout_alignParentLeft="true" />
                <TextView
                    android:layout_centerInParent="true"
                    android:text="Concrete 100"
                    android:textSize="20dp"
                    android:layout_margin="10dp"
                    android:textColor="@color/green"
                    android:layout_width="200dp"
                    android:layout_height="wrap_content"/>
            </RelativeLayout>
        </LinearLayout>
    </RelativeLayout>
</layout>

This is my xml code. I am getting error of duplicate attribute as mentioned in title. android studio showing error because of written background property in Relative layout. when I remove that line then my works fine. can we not use background property in parent view if we are using that in child view.

question from:https://stackoverflow.com/questions/65842992/aapt-error-duplicate-attribute-in-android

Answer 1

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