activity_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <TextView
        android:id="@+id/activityTitleTextview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <TextView 
        android:id="@+id/receivedTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:layout_below="@id/activityTitleTextview"
        android:hint="Received text will come here..."
        android:textAppearance="?android:attr/textAppearanceMedium"/>
  
    
    
    
    
    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        >

        <Button
            android:id="@+id/returnOkBtn"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/return_ok_label" />

        <Button
            android:id="@+id/returnStringBtn"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/return_string_label" />
    </LinearLayout>
    
    <EditText
        android:id="@+id/resultStringEdittext"
        android:layout_width="match_parent" 
        android:layout_height="wrap_content"
        android:layout_above="@id/linearLayout1"
        android:layout_marginBottom="20dp"
        android:hint="@string/result_string_hint"
        />
    
</RelativeLayout>