XML parsing error (android studio)

use this

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

<android.support.v7.widget.Toolbar

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:id="@+id/toolbar"

    app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:minHeight="?attr/actionBarSize"

    app:navigationContentDescription="@string/abc_action_bar_up_description"

    android:background="?attr/colorPrimary"

    app:navigationIcon="?attr/homeAsUpIndicator"

    app:title="@string/action_settings"

    />

this is another example

<RelativeLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:orientation="vertical"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

 

    <android.support.v7.widget.Toolbar

        android:id="@+id/toolbar"

        android:layout_width="match_parent"

        android:layout_height="8dp"

        android:minHeight="?attr/actionBarSize"

        android:background="?attr/colorPrimary"

        app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>

 

    <FrameLayout

        android:id="@+id/putPrefsContentHere"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" />

 

</RelativeLayout>