https://lh3.googleusercontent.com/-XmPUBASB2K0/WUkLoVCp_3I/AAAAAAAAk5Y/4hFyigDOlTY9FTBHbztEKzxtAZdHCKVeQCHMYBhgL/s500/Screenshot_1497959309.png

@DIV
<?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:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.lightbox.textfiletest.MainActivity">

    <Button
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="書き込み" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/buttonReadPrivate"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:enabled="false"
            android:text="読み込み1"
            android:visibility="visible"/>

        <Button
            android:id="@+id/buttonReadExternal"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:enabled="false"
            android:text="読み込み2"/>
    </LinearLayout>

    <EditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:layout_margin="10dp"
        android:background="@drawable/border"
        android:ems="10"
        android:gravity="top|left"
        android:inputType="textMultiLine"
        android:padding="10dp" />

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

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:padding="10dp">

            <TextView
                android:id="@+id/textView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@drawable/border"
                android:padding="10dp" />

        </LinearLayout>
    </ScrollView>

</LinearLayout>

@END