res/layout/gears_dialog_filepicker.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
 * Copyright 2008, The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
-->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content">

  <LinearLayout
    android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@color/gray"
    android:padding="1px">

    <LinearLayout
      android:orientation="vertical"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:background="@color/white">

      <GridView android:id="@+id/files_list"
        android:padding="4px"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:horizontalSpacing="2px"
        android:verticalSpacing="2px"
        android:numColumns="3"
        style="@android:style/Widget.ListView.White" />

    </LinearLayout>

  </LinearLayout>

</LinearLayout>