Textview is only center_horizontal in case of v4.4 devices at upper side of single row and In case of v4.1 and v5.0, textView is exactly centered. I had checked these sorts of question in StackOverflow but no answer solved the issue. Please, check out my code.
single_row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="match_parent"
android:layout_width="match_parent">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardCornerRadius="4dp"
android:layout_margin="4dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="10dp"
android:paddingBottom="10dp"
android:paddingLeft="10dp">
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:src="@drawable/drawable_oval" />
<TextView
android:gravity="center"
android:paddingBottom="3dp"
android:paddingTop="3dp"
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/def_total_schedule"
android:textSize="11sp"
android:layout_alignBottom="@+id/imageView1"
android:layout_toRightOf="@+id/imageView1"
android:layout_toLeftOf="@+id/imageView2"
android:layout_toStartOf="@+id/imageView2" />
<TextView
android:textStyle="bold"
android:textSize="15sp"
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/imageView1"
android:text="@string/default_schedule"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_toLeftOf="@+id/imageView2"
android:layout_toRightOf="@+id/imageView1"
android:layout_toEndOf="@+id/imageView1" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingRight="10dp"
android:src="@mipmap/ic_location"
android:layout_alignTop="@+id/textView1"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignBottom="@+id/imageView1" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:text="@string/sunday"
android:textColor="@color/icons"
android:textStyle="bold"
android:id="@+id/textViewDAY"
android:layout_alignTop="@+id/imageView1"
android:layout_alignBottom="@+id/imageView1"
android:layout_alignLeft="@+id/imageView1"
android:layout_alignRight="@+id/imageView1"
android:gravity="center"
/>
<TextView
android:textStyle="bold"
android:textSize="15sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/default_schedule"
android:id="@+id/textView"
android:gravity="center"
android:layout_below="@+id/textView1"
android:layout_toRightOf="@+id/imageView1"
android:layout_toLeftOf="@+id/imageView2"
android:layout_toStartOf="@+id/imageView2" />
</RelativeLayout>
</android.support.v7.widget.CardView>
</LinearLayout>