Only textView1 is appearing on screen, button and edittext box is not appearing. Please check my code. I am new to android development. I believe that the placement of edittext and button is incorrect.

```
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/textView1" />

    <EditText
        android:id="@+id/edit_message"
        android:layout_width="match_parent"
        android:layout_height="10dp"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="10dp"
        android:ems="10"
        android:hint="@string/edit_message"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/edit_message"
        android:layout_marginTop="49dp"
        android:layout_toRightOf="@+id/edit_message"
        android:onClick="sendMessage"
        android:text="@string/button_send" />

</RelativeLayout>

```