activity_main_setting.xml

<?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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="edu.nctu.wirelab.testsignalv1.MainSetting">

    <ScrollView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent">
            <ListView
                android:id="@+id/list"
                android:layout_height="600px"
                android:layout_width="match_parent">
            </ListView>

            <TextView
                android:id="@+id/IntervalText"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Time Interval(ms):"
                android:layout_below="@+id/list"/>
            <EditText
                android:id="@+id/IntervalEditText"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:hint="ms"
                android:inputType="number"
                android:maxLength="10"
                android:layout_below="@+id/IntervalText"/>
            <TextView
                android:id="@+id/LogPrefixText"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="LogPrefix(only number and alphabet):"
                android:layout_below="@+id/IntervalEditText"/>
            <EditText
                android:id="@+id/LogPrefixEditText"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:hint="Log's Prefix(only number and alphabet)"
                android:digits="0123456789qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM"
                android:maxLength="20"
                android:layout_below="@+id/LogPrefixText"/>

            <Button
                android:id="@+id/ConfirmButton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@+id/LogPrefixEditText"
                android:text="OK"/>
        </LinearLayout>
    </ScrollView>
</RelativeLayout>