SystemUI 状态栏增加移动数据开启图标

原生设计中，移动数据图标只有在网络活动（下载/上传）时，才显示相应的小白色三角图标，如果没有网络活动则没有任何显示。需要在不活动时也显示灰色的三角图标。

系统导航栏中常见信号图标包括：SIM卡信号（移动数据图标）、WIFI。主要关注几个文件

网络监听控制 NetworkControllerImpl.java

信号变化控制 MobileSignalController.java WifiSignalController.java

图标显示view StatusBarMobileView.java StatusBarWifiView.java

一、增加移动网络非活动状态图标view

在原生基础上，增加一个默认灰色三角图标，启用移动数据时就显示在状态栏中。

//frameworks/base/packages/SystemUI/res/layout/status_bar_mobile_signal_group.xml
... ...<FrameLayoutandroid:id="@+id/inout_container"android:layout_height="17dp"android:layout_width="wrap_content"android:layout_gravity="center_vertical"><!-- Add: 增加一层默认图标，使用移动数据时显示 --><ImageViewandroid:id="@+id/mobile_open"android:layout_height="wrap_content"android:layout_width="wrap_content"android:src="@drawable/ic_activity_tran"android:paddingEnd="2dp"/><!-- Add --><ImageViewandroid:id="@+id/mobile_in"android:layout_height="wrap_content"
... ...

二、移动网络状态判断

系统网络发生变化时，会通过广播的方式，通知 NetworkControllerImpl.java 中进行对应变更。

// NetworkControllerImpl.java@Overridepublic void onReceive(Context context, Intent intent) {if (CHATTY) {Log.d(TAG, "onReceive: intent=" + intent);}final String action = intent.getAction();switch (action) {case ConnectivityManager.CONNECTIVITY_ACTION:case ConnectivityManager.INET_CONDITION_ACTION:updateConnectivity();break;case Intent.ACTION_AIRPLANE_MODE_CHANGED:refreshLocale();updateAirplaneMode(false);break;case TelephonyManager.ACTION_DEFAULT_VOICE_SUBSCRIPTION_CHANGED:// We are using different subs now, we might be able to make calls.recalculateEmergency();break;case TelephonyManager.ACTION_DEFAULT_DATA_SUBSCRIPTION_CHANGED:// Notify every MobileSignalController so they can know whether they are the// data sim or not.for (int i = 0; i < mMobileSignalControllers.size(); i++) {MobileSignalController controller = mMobileSignalControllers.valueAt(i);controller.handleBroadcast(intent);}mConfig = Config.readConfig(mContext);mReceiverHandler.post(this::handleConfigurationChanged);break;case Intent.ACTION_SIM_STATE_CHANGED:// Avoid rebroadcast because SysUI is direct boot aware.if (intent.getBooleanExtra(Intent.EXTRA_REBROADCAST_ON_UNLOCK, false)) {break;}// Might have different subscriptions now.updateMobileControllers();break;... ...}}

NetworkControllerImpl 中对各种网络的各种状态变化进行广播监听，执行相应操作。上面代码中几个Action是SIM相关的。虽然每个执行的方法不同，最后都是执行到

MobileSignalController.notifyListeners

这里，根据当前信号状态，对图标（IconState）状态进行刷新。原生设计中这里只有activityIn activityOut 标识网络活动，新增加非网络活动的移动数据状态。

//MobileSignalController.javapublic void notifyListeners(SignalCallback callback) {... ...boolean activityIn = mCurrentState.dataConnected&& !mCurrentState.carrierNetworkChangeMode&& mCurrentState.activityIn;boolean activityOut = mCurrentState.dataConnected&& !mCurrentState.carrierNetworkChangeMode&& mCurrentState.activityOut;showDataIcon &= mCurrentState.isDefault || dataDisabled;int typeIcon = (showDataIcon || mConfig.alwaysShowDataRatIcon) ? icons.mDataType : 0;// Add: 增加是否是移动网络状态。isDefault 是否是移动数据模式 dataSim 是否是默认数据卡 mobileDataEnabled 移动数据是否开启状态Log.d(mTag, "mCurrentState " + mCurrentState);statusIcon.connType = (mCurrentState.isDefault && mCurrentState.dataSim && mCurrentState.mobileDataEnabled) ? 1 : 0;// Addcallback.setMobileDataIndicators(statusIcon, qsIcon, typeIcon, qsTypeIcon,activityIn, activityOut, dataContentDescription, dataContentDescriptionHtml,description, icons.mIsWide, mSubscriptionInfo.getSubscriptionId(),mCurrentState.roaming);}

再交由系统 StatusBarSignalPolicy.java 统一设置到具体的图标状态。对 MobileIconState 也增加一个默认移动数据连接标志 connType，同步更新记录状态。

//StatusBarSignalPolicy.java@Overridepublic void setMobileDataIndicators(IconState statusIcon, IconState qsIcon, int statusType,int qsType, boolean activityIn, boolean activityOut,CharSequence typeContentDescription,CharSequence typeContentDescriptionHtml, CharSequence description,boolean isWide, int subId, boolean roaming) {MobileIconState state = getState(subId);if (state == null) {return;}// Add: 同步 statusIcon 图标状态给具体的 MobileIconStateLog.i(TAG, "setMobileDataIndicators " + statusIcon.connType);state.connType = statusIcon.connType;// Add// Visibility of the data type indicator changedboolean typeChanged = statusType != state.typeId && (statusType == 0 || state.typeId == 0);state.visible = statusIcon.visible && !mBlockMobile;state.strengthId = statusIcon.icon;state.typeId = statusType;state.contentDescription = statusIcon.contentDescription;state.typeContentDescription = typeContentDescription;state.roaming = roaming;state.activityIn = activityIn && mActivityEnabled;state.activityOut = activityOut && mActivityEnabled;// Always send a copy to maintain value type semanticsmIconController.setMobileIcons(mSlotMobile, MobileIconState.copyStates(mMobileStates));}... ...public static class MobileIconState extends SignalIconState {... ...public CharSequence typeContentDescription;public int connType;//Add: 使用移动数据... ...@Overridepublic boolean equals(Object o) {... ...return subId == that.subId &&strengthId == that.strengthId &&typeId == that.typeId &&roaming == that.roaming &&needsLeadingPadding == that.needsLeadingPadding &&Objects.equals(typeContentDescription, that.typeContentDescription)&&// Modify: 增加变量 connTypeconnType == that.connType;}@Overridepublic int hashCode() {// Modify: 增加变量 connTypereturn Objects.hash(super.hashCode(), subId, strengthId, typeId, roaming, needsLeadingPadding, typeContentDescription, connType);}... ...public void copyTo(MobileIconState other) {... ...other.needsLeadingPadding = needsLeadingPadding;other.typeContentDescription = typeContentDescription;//Add: 增加变量 connTypeother.connType = connType;}... ...@Override public String toString() {// Modify: 增加变量 connTypereturn "MobileIconState(subId=" + subId + ", strengthId=" + strengthId + ", roaming="+ roaming + ", typeId=" + typeId + ", visible=" + visible + ", connType=" + connType + ")";}}

继续 setMobileIcons 设置刷新 MobileIconState 流程：

StatusBarIconControllerImpl.setMobileIcons -> StatusBarIconControllerImpl.handleSet -> StatusBarIconController.onSetIconHolder -> StatusBarIconController.onSetMobileIcon

这一段不需要修改，作用就是将 MobileIconState 状态传到 StatusBarMobileView 中。

//StatusBarIconController.javapublic void onSetMobileIcon(int viewIndex, MobileIconState state) {StatusBarMobileView view = (StatusBarMobileView) mGroup.getChildAt(viewIndex);if (view != null) {view.applyMobileState(state);}if (mIsInDemoMode) {mDemoStatusIcons.updateMobileState(state);}}

在 StatusBarMobileView 中根据 MobileIconState 状态数据进行刷新。需要修改两处：初始化及更新的函数。

//StatusBarMobileView.javaprivate void initViewState() {... ...mIn.setVisibility(state.activityIn ? View.VISIBLE : View.GONE);mOut.setVisibility(mState.activityOut ? View.VISIBLE : View.GONE);//Modify: 根据 MobileIconState 中状态，控制图标//mInoutContainer.setVisibility((mState.activityIn || mState.activityOut)mInoutContainer.setVisibility(mState.connType == 1? View.VISIBLE : View.GONE);... ...}private boolean updateState(MobileIconState state) {... ...mIn.setVisibility(state.activityIn ? View.VISIBLE : View.GONE);mOut.setVisibility(state.activityOut ? View.VISIBLE : View.GONE);//Modify: 根据 MobileIconState 中状态，控制图标// mInoutContainer.setVisibility((state.activityIn || state.activityOut)Log.i(TAG, "updateState " + state.connType);mInoutContainer.setVisibility(state.connType == 1? View.VISIBLE : View.GONE);... ...}