espeak-ng/res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp" >

    <LinearLayout
        android:id="@+id/loading"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="vertical"
        android:visibility="gone" >

        <ProgressBar
            style="?android:attr/progressBarStyleLarge"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="16dp" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/loading" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/success"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:visibility="visible" >

        <TextView
            android:id="@+id/currentLocale"
            style="@android:style/TextAppearance.Large"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="6dp"
            android:text="@string/current_tts_locale" />

        <TextView
            android:id="@+id/availableVoices"
            style="@android:style/TextAppearance.Large"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="16dp"
            android:text="@string/available_voices" />

        <Button
            android:id="@+id/engineSettings"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/engine_settings" />

        <Button
            android:id="@+id/ttsSettings"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="6dp"
            android:text="@string/tts_settings" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/failure"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:visibility="gone" >

        <TextView
            style="@android:style/TextAppearance.Large"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/loading_failed" />
    </LinearLayout>

</LinearLayout>