android_frameworks_base/packages/SystemUI/res/layout/status_bar.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/* apps/common/assets/default/default/skins/StatusBar.xml
**
** Copyright 2006, 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.
*/
-->

<!--    android:background="@drawable/status_bar_closed_default_background" -->
<com.android.systemui.statusbar.phone.PhoneStatusBarView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:systemui="http://schemas.android.com/apk/res/com.android.systemui"
    android:id="@+id/status_bar"
    android:background="@drawable/system_bar_background"
    android:orientation="vertical"
    android:focusable="true"
    android:descendantFocusability="afterDescendants"
    >

    <ImageView
        android:id="@+id/notification_lights_out"
        android:layout_width="@dimen/status_bar_icon_size"
        android:layout_height="match_parent"
        android:paddingStart="6dip"
        android:paddingBottom="2dip"
        android:src="@drawable/ic_sysbar_lights_out_dot_small"
        android:scaleType="center"
        android:visibility="gone"
        />

    <LinearLayout android:id="@+id/status_bar_contents"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingStart="6dip"
        android:paddingEnd="6dip"
        android:orientation="horizontal"
        >

        <com.android.systemui.statusbar.AlphaOptimizedFrameLayout
            android:id="@+id/notification_icon_area"
            android:layout_width="0dip"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="horizontal"
            >
            <!-- The alpha of this area is both controlled from PhoneStatusBarTransitions and
                 PhoneStatusBar (DISABLE_NOTIFICATION_ICONS), so we need two views here. -->
            <com.android.systemui.statusbar.AlphaOptimizedLinearLayout
                android:id="@+id/notification_icon_area_inner"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                >
                <com.android.systemui.statusbar.StatusBarIconView android:id="@+id/moreIcon"
                    android:layout_width="@dimen/status_bar_icon_size"
                    android:layout_height="match_parent"
                    android:src="@drawable/stat_notify_more"
                    android:visibility="gone"
                    />
                <com.android.systemui.statusbar.phone.IconMerger android:id="@+id/notificationIcons"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_alignParentStart="true"
                    android:gravity="center_vertical"
                    android:orientation="horizontal"/>
            </com.android.systemui.statusbar.AlphaOptimizedLinearLayout>
        </com.android.systemui.statusbar.AlphaOptimizedFrameLayout>

        <com.android.systemui.statusbar.AlphaOptimizedLinearLayout android:id="@+id/system_icon_area"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:orientation="horizontal"
            >

            <include layout="@layout/system_icons" />

            <com.android.systemui.statusbar.policy.Clock
                android:id="@+id/clock"
                android:textAppearance="@style/TextAppearance.StatusBar.Clock"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:singleLine="true"
                android:paddingStart="6dip"
                android:gravity="center_vertical|start"
                />
        </com.android.systemui.statusbar.AlphaOptimizedLinearLayout>
    </LinearLayout>

    <ViewStub
        android:id="@+id/ticker_stub"
        android:inflatedId="@+id/ticker"
        android:layout="@layout/status_bar_ticker"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        />

</com.android.systemui.statusbar.phone.PhoneStatusBarView>