概述
在产品定义中，设备不需要携带电池，硬件设计中也不包含电池，需要去掉电池相关的显示 所以有需求去掉状态栏里面的电池图标
问题分析
状态栏的布局文件如下
//path:frameworks/base/packages/SystemUI/res/layout/status_bar.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- 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:orientation="vertical"
android:focusable="false"
android:descendantFocusability="afterDescendants"
android:accessibilityPaneTitle="@string/status_bar"
>
<ImageView
android:id="@+id/notification_lights_out"
android:layout_width="@dimen/status_bar_icon_size"
android:layout_height="match_parent"
android:paddingStart="@dimen/status_bar_padding_start"
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="@dimen/status_bar_padding_start"
android:paddingEnd="@dimen/status_bar_padding_end"
android:paddingTop="@dimen/status_bar_padding_top"
android:orientation="horizontal"
>
<FrameLayout
android:layout_height="match_parent"
android:layout_width="0dp"
android:layout_weight="1">
<include layout="@layout/heads_up_status_bar_layout" />
<!-- The alpha of the left side is controlled by PhoneStatusBarTransitions, and the
individual views are controlled by StatusBarManager disable flags DISABLE_CLOCK and
DISABLE_NOTIFICATION_ICONS, respectively -->
<LinearLayout
android:id="@+id/status_bar_left_side"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:clipChildren="false"
>
<ViewStub
android:id="@+id/operator_name"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout="@layout/operator_name" />
<com.android.systemui.statusbar.policy.Clock
android:id="@+id/clock"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:textAppearance="@style/TextAppearance.StatusBar.Clock"
android:singleLine="true"
android:paddingStart="@dimen/status_bar_left_clock_starting_padding"
android:paddingEnd="@dimen/status_bar_left_clock_end_padding"
android:gravity="center_vertical|start"
/>
<include layout="@layout/ongoing_call_chip" />
<com.android.systemui.statusbar.AlphaOptimizedFrameLayout
android:id="@+id/notification_icon_area"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:visibility="gone"
android:orientation="horizontal"
android:clipChildren="false"/>
</LinearLayout>
</FrameLayout>
<!-- Space should cover the notch (if it exists) and let other views lay out around it -->
<android.widget.Space
android:id="@+id/cutout_space_view"
android:layout_width="0dp"
android:layout_height="match_parent"
android:gravity="center_horizontal|center_vertical"
/>
<com.android.systemui.statusbar.AlphaOptimizedFrameLayout
android:id="@+id/centered_icon_area"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal"
android:clipChildren="false"
android:gravity="center_horizontal|center_vertical"/>
<com.android.keyguard.AlphaOptimizedLinearLayout android:id="@+id/system_icon_area"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal"
android:gravity="center_vertical|end"
>
<include layout="@layout/system_icons" />
</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>
在status_bar layout 中没有直接找到电池相关的view，但是它include了system_icons layout 继续向system_icons layout中找
//path:frameworks/base/packages/SystemUI/res/layout/system_icons.xml
<?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"
xmlns:systemui="http://schemas.android.com/apk/res-auto"
android:id="@+id/system_icons"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_vertical">
<com.android.systemui.statusbar.phone.StatusIconContainer android:id="@+id/statusIcons"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="match_parent"
android:paddingEnd="@dimen/signal_cluster_battery_padding"
android:gravity="center_vertical"
android:orientation="horizontal"/>
<com.android.systemui.battery.BatteryMeterView android:id="@+id/battery"
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:clipToPadding="false"
android:clipChildren="false"
systemui:textAppearance="@style/TextAppearance.StatusBar.Clock" />
</LinearLayout>
此处我们找到了电池相关的view BatteryMeterView ，直接给它gone掉。
编译烧录以后发现并没有起作用，那么只能说明 要么找错了地方要么代码中有地方给它重新visible了，还是得具体分析。
我们发现了BatteryMeterView 的控制类BatteryMeterViewController，具体分析这个类：
//frameworks/base/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterViewController.java
/** Controller for {@link BatteryMeterView}. **/
public class BatteryMeterViewController extends ViewController<BatteryMeterView> {
...
private final TunerService.Tunable mTunable = new TunerService.Tunable() {
@Override
public void onTuningChanged(String key, String newValue) {
if (StatusBarIconController.ICON_HIDE_LIST.equals(key)) {
ArraySet<String> icons = StatusBarIconController.getIconHideList(
getContext(), newValue);
//如果icons里面包含BatteryMeterView即设置为gone 否则设置为visible
mView.setVisibility(icons.contains(mSlotBattery) ? View.GONE : View.VISIBLE);
}
}
};
...
@Override
protected void onViewAttached() {
mConfigurationController.addCallback(mConfigurationListener);
subscribeForTunerUpdates();
mBatteryController.addCallback(mBatteryStateChangeCallback);
registerShowBatteryPercentObserver(ActivityManager.getCurrentUser());
registerGlobalBatteryUpdateObserver();
mCurrentUserTracker.startTracking();
mView.updateShowPercent();
}
@Override
protected void onViewDetached() {
mConfigurationController.removeCallback(mConfigurationListener);
unsubscribeFromTunerUpdates();
mBatteryController.removeCallback(mBatteryStateChangeCallback);
mCurrentUserTracker.stopTracking();
mContentResolver.unregisterContentObserver(mSettingObserver);
}
/**
* Turn off {@link BatteryMeterView}'s subscribing to the tuner for updates, and thus avoid it
* controlling its own visibility.
*/
public void ignoreTunerUpdates() {
mIgnoreTunerUpdates = true;
unsubscribeFromTunerUpdates();
}
private void subscribeForTunerUpdates() {
if (mIsSubscribedForTunerUpdates || mIgnoreTunerUpdates) {
return;
}
mTunerService.addTunable(mTunable, StatusBarIconController.ICON_HIDE_LIST);
mIsSubscribedForTunerUpdates = true;
}
private void unsubscribeFromTunerUpdates() {
if (!mIsSubscribedForTunerUpdates) {
return;
}
mTunerService.removeTunable(mTunable);
mIsSubscribedForTunerUpdates = false;
}
....
}
果然在这个类里面找到了BatteryMeterView 隐藏或者显示操作的地方。TunerService的onTuningChanged时，会根据条件来对VIEW进行隐藏显示，并且BatteryMeterViewController 在attach的时候 就去注册监听了对Tunerservice的更新。
接下来我们需要一直隐藏BatteryMeterView 根据上面分析只需要让*StatusBarIconController.getIconHideList( getContext(), newValue)*方法中拿到的icons不包含BatteryMeterView 即可
继续分析StatusBarIconController.getIconHideList()方法
//path:frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconController.java
public interface StatusBarIconController {
...
// TODO: See if we can rename this tunable name.
String ICON_HIDE_LIST = "icon_blacklist";
/** Reads the default hide list from config value unless hideListStr is provided. */
static ArraySet<String> getIconHideList(Context context, String hideListStr) {
ArraySet<String> ret = new ArraySet<>();
String[] hideList = hideListStr == null
? context.getResources().getStringArray(R.array.config_statusBarIconsToExclude)//从config_statusBarIconsToExclude中获取hidelist
: hideListStr.split(",");
for (String slot : hideList) {
if (!TextUtils.isEmpty(slot)) {
ret.add(slot);
}
}
return ret;
}
}
...
查看config_statusBarIconsToExclude
//path:frameworks/base/packages/SystemUI/res/values/config.xml
<!-- Defines system icons to be excluded from the display. That is to say, the icons in the
status bar that are part of this list are never displayed. Each item in the list must be a
string defined in core/res/res/config.xml to properly exclude the icon.
-->
<string-array name="config_statusBarIconsToExclude" translatable="false">
<item>@*android:string/status_bar_rotate</item>
</string-array>
发现默认的list中去掉了rotate bar 至此我们就找到了去掉电池图标的方法
<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
<!-- Do not translate. Defines the slots for the right-hand side icons. That is to say, the
icons in the status bar that are not notifications. -->
<string-array name="config_statusBarIcons">
<item><xliff:g id="id">@string/status_bar_no_calling</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_call_strength</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_alarm_clock</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_rotate</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_headset</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_data_saver</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_ime</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_sync_failing</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_sync_active</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_nfc</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_tty</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_speakerphone</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_cdma_eri</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_data_connection</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_phone_evdo_signal</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_phone_signal</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_secure</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_managed_profile</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_cast</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_screen_record</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_vpn</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_bluetooth</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_camera</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_microphone</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_location</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_mute</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_volume</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_zen</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_ethernet</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_wifi</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_hotspot</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_mobile</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_airplane</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_battery</xliff:g></item>
<item><xliff:g id="id">@string/status_bar_sensors_off</xliff:g></item>
</string-array>
<string translatable="false" name="status_bar_rotate">rotate</string>
<string translatable="false" name="status_bar_headset">headset</string>
<string translatable="false" name="status_bar_data_saver">data_saver</string>
<string translatable="false" name="status_bar_managed_profile">managed_profile</string>
<string translatable="false" name="status_bar_ime">ime</string>
<string translatable="false" name="status_bar_sync_failing">sync_failing</string>
<string translatable="false" name="status_bar_sync_active">sync_active</string>
<string translatable="false" name="status_bar_cast">cast</string>
<string translatable="false" name="status_bar_hotspot">hotspot</string>
<string translatable="false" name="status_bar_location">location</string>
<string translatable="false" name="status_bar_bluetooth">bluetooth</string>
<string translatable="false" name="status_bar_nfc">nfc</string>
<string translatable="false" name="status_bar_tty">tty</string>
<string translatable="false" name="status_bar_speakerphone">speakerphone</string>
<string translatable="false" name="status_bar_zen">zen</string>
<string translatable="false" name="status_bar_mute">mute</string>
<string translatable="false" name="status_bar_volume">volume</string>
<string translatable="false" name="status_bar_wifi">wifi</string>
<string translatable="false" name="status_bar_cdma_eri">cdma_eri</string>
<string translatable="false" name="status_bar_data_connection">data_connection</string>
<string translatable="false" name="status_bar_phone_evdo_signal">phone_evdo_signal</string>
<string translatable="false" name="status_bar_phone_signal">phone_signal</string>
<string translatable="false" name="status_bar_battery">battery</string>
<string translatable="false" name="status_bar_alarm_clock">alarm_clock</string>
<string translatable="false" name="status_bar_secure">secure</string>
<string translatable="false" name="status_bar_clock">clock</string>
<string translatable="false" name="status_bar_mobile">mobile</string>
<string translatable="false" name="status_bar_vpn">vpn</string>
<string translatable="false" name="status_bar_ethernet">ethernet</string>
<string translatable="false" name="status_bar_microphone">microphone</string>
<string translatable="false" name="status_bar_camera">camera</string>
<string translatable="false" name="status_bar_airplane">airplane</string>
<string translatable="false" name="status_bar_no_calling">no_calling</string>
<string translatable="false" name="status_bar_call_strength">call_strength</string>
<string translatable="false" name="status_bar_sensors_off">sensors_off</string>
<string translatable="false" name="status_bar_screen_record">screen_record</string>
以上是statusBar 中包含的icons 我们需要去掉就可以将相应的icon加入到config_statusBarIconsToExclude列表中
解决方案
根据以上分析，我们要去掉电池状态图标 只需要在config.xml中的config_statusBarIconsToExcludelist中加入电池icon即可
overlay 修改内容如下：
old mode 100644
new mode 100755
index 2a1a1f4..1937f5e
--- a/device/rockchip/xxx/xxx/overlay/frameworks/base/packages/SystemUI/res/values/config.xml
+++ b/device/rockchip/xxx/xxx/overlay/frameworks/base/packages/SystemUI/res/values/config.xml
@@ -20,6 +20,16 @@
<!-- These resources are around just to allow their values to be customized
for different hardware and product builds. -->
<resources>
-<!--add for Notification-->
//此方法可以让通知栏无法被下拉出来
-<bool name="config_enableNotificationShadeDrag">false</bool>
+ <!--add for Notification-->
+ <bool name="config_enableNotificationShadeDrag">false</bool>
+
+ <!-- Defines system icons to be excluded from the display. That is to say, the icons in the
+ status bar that are part of this list are never displayed. Each item in the list must be a
+ string defined in core/res/res/config.xml to properly exclude the icon.
+ -->
+ <string-array name="config_statusBarIconsToExclude" translatable="false">
+ <item>@*android:string/status_bar_rotate</item>
+ <item>@*android:string/status_bar_headset</item>
+ <item>@*android:string/status_bar_battery</item>
+ </string-array>
</resources>
此处添加了headset 和battery进list中，并且禁止了通知栏下拉。
编译烧录，状态栏中电池图标已被去掉