activity_sms_sender.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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/holo_orange_dark"
    android:orientation="vertical"
    tools:context="com.godoro.androiddevices.SmsSenderActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/smsSender"
        android:textAlignment="center"
        android:textSize="30sp"
        android:textStyle="bold" />

    <EditText
        android:id="@+id/phoneNumberEdit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@android:color/background_light"
        android:ems="10"
        android:hint="@string/phoneNumber"
        android:inputType="phone" />

    <EditText
        android:id="@+id/smsBodyEdit"
        android:layout_width="match_parent"
        android:layout_height="194dp"
        android:background="@android:color/background_light"
        android:ems="10"
        android:hint="@string/messageBody"
        android:inputType="textPersonName"
        android:lines="5"
        android:maxLines="10" />

    <Button
        android:id="@+id/sendByApplicationButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="onClickSendByApplication"
        android:text="@string/sendByActivity" />

    <Button
        android:id="@+id/sendByLibraryButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="onClickSendByLibrary"
        android:text="@string/sendByLibrary" />
</LinearLayout>