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