sample_main.xml

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<!--
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  Copyright 2013 The Android Open Source Project
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  Licensed under the Apache License, Version 2.0 (the "License");
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  you may not use this file except in compliance with the License.
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  You may obtain a copy of the License at
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      http://www.apache.org/licenses/LICENSE-2.0
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  Unless required by applicable law or agreed to in writing, software
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  distributed under the License is distributed on an "AS IS" BASIS,
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  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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  See the License for the specific language governing permissions and
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  limitations under the License.
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  -->
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<!--
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    The top-level LinearLayout uses a horizontal divider to visually
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    distinguish the top description box, list, and bottom button bar.
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    android:showDividers="middle" draws dividers between each child view and
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    android:divider="?android:dividerHorizontal" indicates that the standard
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    horizontal system divider (set in the activity's theme) should be used to
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    draw the divider.
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-->
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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    android:orientation="vertical"
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    android:layout_width="match_parent"
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    android:layout_height="match_parent"
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    android:divider="?android:dividerHorizontal"
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    android:showDividers="middle">
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    <TextView style="@style/Widget.DescriptionBar"
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        android:layout_width="match_parent"
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        android:layout_height="wrap_content"
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        android:text="@string/intro_message" />
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    <!--
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        Remember to use padding on your ListViews to adhere to the standard
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        metrics described in the Android Design guidelines. When doing so,
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        you should set the android:scrollbarStyle such that the scrollbar
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        doesn'isn't inset.
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    -->
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    <ListView android:id="@android:id/list"
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        android:layout_width="match_parent"
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        android:layout_height="0dp"
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        android:layout_weight="1"
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        android:paddingLeft="@dimen/page_margin"
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        android:paddingRight="@dimen/page_margin"
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        android:scrollbarStyle="outsideOverlay" />
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    <!--
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        When using the Holo theme (setting your activity or app theme to
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        Theme.Holo or one of its descendants), a LinearLayout with the
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        ?android:buttonBarStyle will draw dividers (with padding) between
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        buttons.
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    -->
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    <LinearLayout style="?android:buttonBarStyle"
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        android:layout_width="match_parent"
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        android:layout_height="wrap_content"
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        android:orientation="horizontal">
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        <!--
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            Make sure to apply the ?android:buttonBarStyle to each button
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            in the button bar.
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            In the Holo theme, this style is very similar to
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            ?android:borderlessButtonStyle, but designed for use specifically
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            in horizontal button bars.
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        -->
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        <Button style="?android:buttonBarButtonStyle"
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            android:id="@+id/cancel_button"
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            android:layout_width="0dp"
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            android:layout_height="wrap_content"
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            android:layout_weight="1"
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            android:text="@string/cancel" />
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        <Button style="?android:buttonBarButtonStyle"
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            android:id="@+id/ok_button"
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            android:layout_width="0dp"
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            android:layout_height="wrap_content"
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            android:layout_weight="1"
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            android:text="@string/ok" />
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    </LinearLayout>
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</LinearLayout>