How to give gravity for child views inside ConstraintLayout

You need to remove app:layout_constraintStart_toStartOf="parent" from all your views except first one.because it's will assign your all views in left.

<android.support.constraint.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:id="@+id/mylotslist_itemview"
android:layout_width="match_parent"
android:layout_height="wrap_content">

<TextView
    android:id="@+id/serialnumber"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:gravity="left"
    android:padding="8dp"
    android:text="1"
    android:textColor="@color/black"
    android:textSize="@dimen/font_normal"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintWidth_percent="0.1" />

<TextView
    android:id="@+id/lotnumber"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:gravity="left"
    android:padding="8dp"
    android:text="50"
    android:textColor="@color/black"
    android:textSize="@dimen/font_normal"
    app:layout_constraintStart_toEndOf="@+id/serialnumber"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintWidth_percent="0.1" />

<TextView
    android:id="@+id/sellername"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:gravity="end"
    android:padding="8dp"
    android:text="ffffffffff"
    android:textColor="@color/black"
    app:layout_constraintStart_toEndOf="@+id/lotnumber"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintWidth_percent="0.2" />

<TextView
    android:id="@+id/lotstatus"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:background="@color/colorPrimary"
    android:gravity="start"
    android:padding="8dp"
    android:text="Alloted and Empty"
    android:textColor="@color/white"
    android:textSize="@dimen/font_normal"
    app:layout_constraintStart_toEndOf="@+id/sellername"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintWidth_percent="0.3" />

<TextView
    android:id="@+id/createddate"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:gravity="start"
    android:padding="8dp"
    android:text="01-FEB-2018 10:30 AM"
    android:textColor="@color/black"
    android:textSize="@dimen/font_normal"
    app:layout_constraintStart_toEndOf="@+id/lotstatus"
    app:layout_constraintWidth_percent="0.3" />

</android.support.constraint.ConstraintLayout>


Remove app:layout_constraintStart_toStartOf="parent" from all views except first one and also add app:layout_constraintStart_toEndOf = "@+id/your_left_views_id" for each view except first one.

like

<android.support.constraint.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:id="@+id/mylotslist_itemview"
android:layout_height="wrap_content">

<TextView
    android:id="@+id/serialnumber"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:gravity="left"
    android:padding="@dimen/padding5"
    android:text="1"
    android:textColor="@color/black"
    android:textSize="@dimen/list_itemtextsize"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.0"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.0" />

<TextView
    android:id="@+id/lotnumber"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:gravity="left"
    android:padding="@dimen/padding5"
    android:text="50"
    android:textColor="@color/black"
    android:textSize="@dimen/list_itemtextsize"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintHorizontal_bias="0.08"
    app:layout_constraintStart_toEndOf="@+id/serialnumber"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.0" />

<TextView
    android:id="@+id/sellername"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:gravity="right"
    android:padding="@dimen/padding5"
    android:text="ffffffffff"
    android:textColor="@color/black"
    app:layout_constraintStart_toEndOf="@+id/lotnumber"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.0" />

<TextView
    android:id="@+id/lotstatus"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:background="@color/colorPrimary"
    android:gravity="left"
    android:paddingBottom="@dimen/padding5"
    android:paddingLeft="@dimen/padding5"
    android:paddingRight="@dimen/padding5"
    android:paddingTop="@dimen/padding5"
    android:text="Alloted and Empty"
    android:textColor="@color/white"

    android:textSize="@dimen/list_itemtextsize"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintHorizontal_bias="0.66"
    app:layout_constraintStart_toEndOf="@+id/sellername"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.0" />

<TextView
    android:id="@+id/createddate"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:gravity="left"
    android:padding="@dimen/padding5"
    android:text="01-FEB-2018 10:30 AM"
    android:textColor="@color/black"
    android:textSize="@dimen/list_itemtextsize"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="1.0"
    app:layout_constraintStart_toEndOf="@+id/lotstatus"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.0" />