crystal-wallet-android/app/src/main/res/layout/fragment_transactions.xml

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    tools:context="cy.agorise.crystalwallet.fragments.TransactionsFragment">

    <RelativeLayout
        android:id="@+id/rlTransactionToolsHeader"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <EditText
            android:id="@+id/etTransactionSearch"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentStart="true"
            android:layout_toStartOf="@+id/btnTransactionsFilterDisplay" />

        <Button
            android:id="@+id/btnTransactionsFilterDisplay"
            android:layout_width="40dip"
            android:layout_height="40dip"
            android:layout_alignParentTop="true"
            android:layout_toStartOf="@+id/spTransactionsOrder"
            android:visibility="gone" />

        <Spinner
            android:id="@+id/spTransactionsOrder"
            android:layout_width="40dip"
            android:layout_height="40dip"
            android:layout_alignParentEnd="true"
            android:background="@drawable/sort_transactions_icon"/>
    </RelativeLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/rvTransactions"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:padding="4dp"
        android:clipToPadding="false"
        app:layout_constraintTop_toBottomOf="@id/rlTransactionToolsHeader"
        app:layout_constraintBottom_toBottomOf="parent"
        tools:listitem="@layout/transaction_list_item" />

    <TextView
        android:id="@+id/tvNoTransactions"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/You_dont_have_transactions"
        android:textColor="@color/gray"
        android:textSize="15sp"
        android:textAlignment="center"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"/>

</android.support.constraint.ConstraintLayout>