Android 8.1隐藏状态栏图标的实例代码

<?xml version=\"1.0\" encoding=\"utf-8\"?>
<!--
**
** 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:layout_width=\"match_parent\"
  android:layout_height=\"@dimen/status_bar_height\"
  android:id=\"@+id/status_bar\"
  android:background=\"@drawable/system_bar_background\"
  android:orientation=\"vertical\"
  android:focusable=\"false\"
  android:descendantFocusability=\"afterDescendants\"
  >
  <ImageView
    android:id=\"@+id/notification_lights_out\"
    android:layout_width=\"0dp\"
    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=\"6dp\"
    android:paddingEnd=\"8dp\"
    android:orientation=\"horizontal\"
    >
    <!-- The alpha of this area is controlled from both PhoneStatusBarTransitions and
       PhoneStatusBar (DISABLE_NOTIFICATION_ICONS). -->
    <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:visibility=\"invisible\"
      android:orientation=\"horizontal\" />
    <com.android.keyguard.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=\"@dimen/status_bar_clock_starting_padding\"
        android:paddingEnd=\"@dimen/status_bar_clock_end_padding\"
        android:gravity=\"center_vertical|start\"
        />
    </com.android.keyguard.AlphaOptimizedLinearLayout>
  </LinearLayout>
  <ViewStub
    android:id=\"@+id/emergency_cryptkeeper_text\"
    android:layout_width=\"wrap_content\"
    android:layout_height=\"match_parent\"
    android:layout=\"@layout/emergency_cryptkeeper_text\"
  />
</com.android.systemui.statusbar.phone.PhoneStatusBarView>
<?xml version=\"1.0\" encoding=\"utf-8\"?><!--
 ~ Copyright (C) 2014 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:id=\"@+id/system_icons\"
  android:layout_width=\"wrap_content\"
  android:layout_height=\"match_parent\"
  android:gravity=\"center_vertical\">
  <com.android.keyguard.AlphaOptimizedLinearLayout android:id=\"@+id/statusIcons\"
    android:layout_width=\"wrap_content\"
    android:layout_height=\"match_parent\"
    android:gravity=\"center_vertical\"
    android:visibility=\"invisible\"
    android:orientation=\"horizontal\"/>
  <include layout=\"@layout/signal_cluster_view\"
    android:visibility=\"invisible\"
    android:layout_width=\"wrap_content\"
    android:layout_height=\"wrap_content\"
    android:layout_marginStart=\"@dimen/signal_cluster_margin_start\"/>
  <com.android.systemui.BatteryMeterView android:id=\"@+id/battery\"
    android:layout_height=\"match_parent\"
    android:layout_width=\"wrap_content\"
    />
</LinearLayout>