Android8.1 MTK平台 SystemUI源码分析之 网络信号栏显示刷新

本文主要是介绍Android8.1 MTK平台 SystemUI源码分析之 网络信号栏显示刷新，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

SystemUI系列文章

Android8.1 MTK平台 SystemUI源码分析之 Notification流程

Android8.1 MTK平台 SystemUI源码分析之 电池时钟刷新

Android 8.1平台SystemUI 导航栏加载流程解析

一、从布局说起

前面的文章分析过，网络信号栏这块属于 system_icon_area，里面包含蓝牙、wifi、VPN、网卡、SIM卡网络类型、

数据流量符号、SIM卡信号格、电池、时钟。

先来看下 system_icon_area 对应的布局文件 system_icons.xml

<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:orientation="horizontal"/><include layout="@layout/signal_cluster_view"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="0dp"/>
</LinearLayout>

看到里面的 signal_cluster_view.xml 正是我们要找的信号栏布局文件，内容有点多，下面只截取我们关心的

vendor\mediatek\proprietary\packages\apps\SystemUI\res\layout\signal_cluster_view.xml

<com.android.systemui.statusbar.SignalClusterViewxmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/signal_cluster"android:layout_height="match_parent"android:layout_width="wrap_content"android:gravity="center_vertical"android:orientation="horizontal"android:paddingEnd="@dimen/signal_cluster_battery_padding">... vpn ... 网卡... wifi手机信号栏<LinearLayoutandroid:id="@+id/mobile_signal_group"android:layout_height="wrap_content"android:layout_width="wrap_content"></LinearLayout>未插入SIM卡<FrameLayoutandroid:id="@+id/no_sims_combo"android:layout_height="wrap_content"android:layout_width="wrap_content"android:contentDescription="@string/accessibility_no_sims"><com.android.systemui.statusbar.AlphaOptimizedImageViewandroid:theme="?attr/lightIconTheme"android:id="@+id/no_sims"android:layout_height="wrap_content"android:layout_width="wrap_content"android:src="@drawable/stat_sys_no_sims"/><com.android.systemui.statusbar.AlphaOptimizedImageViewandroid:theme="?attr/darkIconTheme"android:id="@+id/no_sims_dark"android:layout_height="wrap_content"android:layout_width="wrap_content"android:src="@drawable/stat_sys_no_sims"android:alpha="0.0"/></FrameLayout><Viewandroid:id="@+id/wifi_airplane_spacer"android:layout_width="@dimen/status_bar_airplane_spacer_width"android:layout_height="4dp"android:visibility="gone"/>飞行模式<ImageViewandroid:id="@+id/airplane"android:layout_height="wrap_content"android:layout_width="wrap_content"/>
</com.android.systemui.statusbar.SignalClusterView>

可以看到最外层是自定义 SignalClusterView，xml里包含了 vpn、网卡、wifi、手机信号栏、未插入SIM卡、飞行模式对应的 view，那么接下来看下 SignalClusterView 代码

vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\android\systemui\statusbar\SignalClusterView.java

public class SignalClusterView extends LinearLayout implements NetworkControllerImpl.SignalCallback, SecurityController.SecurityControllerCallback, Tunable,DarkReceiver public SignalClusterView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);Resources res = getResources();mMobileSignalGroupEndPadding =res.getDimensionPixelSize(R.dimen.mobile_signal_group_end_padding);mMobileDataIconStartPadding =res.getDimensionPixelSize(R.dimen.mobile_data_icon_start_padding);mWideTypeIconStartPadding = res.getDimensionPixelSize(R.dimen.wide_type_icon_start_padding);mSecondaryTelephonyPadding = res.getDimensionPixelSize(R.dimen.secondary_telephony_padding);mEndPadding = res.getDimensionPixelSize(R.dimen.signal_cluster_battery_padding);mEndPaddingNothingVisible = res.getDimensionPixelSize(R.dimen.no_signal_cluster_battery_padding);TypedValue typedValue = new TypedValue();res.getValue(R.dimen.status_bar_icon_scale_factor, typedValue, true);mIconScaleFactor = typedValue.getFloat();//网络相关控制器mNetworkController = Dependency.get(NetworkController.class);//安全相关控制器mSecurityController = Dependency.get(SecurityController.class);updateActivityEnabled();/// M: Add for Plugin feature @ {mStatusBarExt = OpSystemUICustomizationFactoryBase.getOpFactory(context).makeSystemUIStatusBar(context);/// @ }mIsWfcEnable = SystemProperties.get("persist.mtk_wfc_support").equals("1");
}

看到 SignalClusterView 继承自 LinearLayout，实现了 NetworkController、SecurityController(这俩类控制图标的刷新逻辑)

构造方法中通过 Dependency.get() 实例化 NetworkController、SecurityController这俩核心

类，跟进 Dependent 类中大概看了下 get()方法，其实就是通过单例模式来进行管理，里面维护了一

个数据类型为 ArrayMap 的 DependencyProvider 集合对象，通过 put和 get 来存取。

接着回到 SignalClusterView 中看下控件都是怎么初始化的？

 @Override
protected void onFinishInflate() {super.onFinishInflate();mVpn            = findViewById(R.id.vpn);mEthernetGroup  = findViewById(R.id.ethernet_combo);mEthernet       = findViewById(R.id.ethernet);mEthernetDark   = findViewById(R.id.ethernet_dark);mWifiGroup      = findViewById(R.id.wifi_combo);mWifi           = findViewById(R.id.wifi_signal);mWifiDark       = findViewById(R.id.wifi_signal_dark);mWifiActivityIn = findViewById(R.id.wifi_in);mWifiActivityOut= findViewById(R.id.wifi_out);mAirplane       = findViewById(R.id.airplane);mNoSims         = findViewById(R.id.no_sims);mNoSimsDark     = findViewById(R.id.no_sims_dark);mNoSimsCombo    =             findViewById(R.id.no_sims_combo);mWifiAirplaneSpacer =         findViewById(R.id.wifi_airplane_spacer);mWifiSignalSpacer =           findViewById(R.id.wifi_signal_spacer);mMobileSignalGroup =          findViewById(R.id.mobile_signal_group);maybeScaleVpnAndNoSimsIcons();
}

这里初始化了一堆刚刚布局文件里的控件，onFinishInflate() 在 xml 布局文件被加载完成后就会调

用，我们看到布局文件中都没有给控件设置对应的 background icon，而且有的 visibility 为

gone，那么信号栏图标是如何设置对应的icon和显示的呢？

二、SignalCluterView 详解

SignalCluterView 中调用频率很高的方法 apply() 就是幕后黑手,通过该方法控制一系列图标的更

新， 然而 SignalCallback 的如下每个回调最终都调用 apply()

1、setWifiIndicators() wifi开关状态、流量上下行

2、setMobileDataIndicators() 手机网络类型、信号强度、流量上下行、volte图标

3、setSubs() SIM卡识别结束

4、setNoSims() 未插入SIM卡状态

5、setEthernetIndicators() 网卡状态

6、setIsAirplaneMode() 飞行模式是否打开

7、setMobileDataEnabled() SIM卡数据流量是否开启

1、apply()

private void apply() {if (mWifiGroup == null) return;//vpn图标if (mVpnVisible) {if (mLastVpnIconId != mVpnIconId) {setIconForView(mVpn, mVpnIconId);mLastVpnIconId = mVpnIconId;}mIconLogger.onIconShown(SLOT_VPN);mVpn.setVisibility(View.VISIBLE);} else {mIconLogger.onIconHidden(SLOT_VPN);mVpn.setVisibility(View.GONE);}if (DEBUG) Log.d(TAG, String.format("vpn: %s", mVpnVisible ? "VISIBLE" : "GONE"));//网卡图标if (mEthernetVisible) {if (mLastEthernetIconId != mEthernetIconId) {setIconForView(mEthernet, mEthernetIconId);setIconForView(mEthernetDark, mEthernetIconId);mLastEthernetIconId = mEthernetIconId;}mEthernetGroup.setContentDescription(mEthernetDescription);mIconLogger.onIconShown(SLOT_ETHERNET);mEthernetGroup.setVisibility(View.VISIBLE);} else {mIconLogger.onIconHidden(SLOT_ETHERNET);mEthernetGroup.setVisibility(View.GONE);}if (DEBUG) Log.d(TAG,String.format("ethernet: %s",(mEthernetVisible ? "VISIBLE" : "GONE")));//wifi图标if (mWifiVisible) {if (mWifiStrengthId != mLastWifiStrengthId) {setIconForView(mWifi, mWifiStrengthId);setIconForView(mWifiDark, mWifiStrengthId);mLastWifiStrengthId = mWifiStrengthId;}mIconLogger.onIconShown(SLOT_WIFI);mWifiGroup.setContentDescription(mWifiDescription);mWifiGroup.setVisibility(View.VISIBLE);} else {mIconLogger.onIconHidden(SLOT_WIFI);mWifiGroup.setVisibility(View.GONE);}if (DEBUG) Log.d(TAG,String.format("wifi: %s sig=%d",(mWifiVisible ? "VISIBLE" : "GONE"),mWifiStrengthId));//wifi数据上下行图标mWifiActivityIn.setVisibility(mWifiIn ? View.VISIBLE : View.GONE);mWifiActivityOut.setVisibility(mWifiOut ? View.VISIBLE : View.GONE);boolean anyMobileVisible = false;/// M: Support for [Network Type on Statusbar]/// A spacer is set between networktype and WIFI icon @ {if (FeatureOptions.MTK_CTA_SET) {anyMobileVisible = true;}/// @ }//SIM 卡组图标int firstMobileTypeId = 0;for (PhoneState state : mPhoneStates) {//PhoneState中的另一个apply()方法，对应网络类型、信号格等if (state.apply(anyMobileVisible)) {if (!anyMobileVisible) {firstMobileTypeId = state.mMobileTypeId;anyMobileVisible = true;}}}if (anyMobileVisible) {mIconLogger.onIconShown(SLOT_MOBILE);} else {mIconLogger.onIconHidden(SLOT_MOBILE);}//飞行模式图标if (mIsAirplaneMode) {if (mLastAirplaneIconId != mAirplaneIconId) {setIconForView(mAirplane, mAirplaneIconId);mLastAirplaneIconId = mAirplaneIconId;}mAirplane.setContentDescription(mAirplaneContentDescription);mIconLogger.onIconShown(SLOT_AIRPLANE);mAirplane.setVisibility(VISIBLE);} else {mIconLogger.onIconHidden(SLOT_AIRPLANE);mAirplane.setVisibility(View.GONE);}//wifi和飞行模式间隔if (mIsAirplaneMode && mWifiVisible) {mWifiAirplaneSpacer.setVisibility(View.VISIBLE);} else {mWifiAirplaneSpacer.setVisibility(View.GONE);}if (((anyMobileVisible && firstMobileTypeId != 0) || mNoSimsVisible) && mWifiVisible) {mWifiSignalSpacer.setVisibility(View.VISIBLE);} else {mWifiSignalSpacer.setVisibility(View.GONE);}//未插入SIM卡图标组if (mNoSimsVisible) {mIconLogger.onIconShown(SLOT_MOBILE);mNoSimsCombo.setVisibility(View.VISIBLE);if (!Objects.equals(mSimDetected, mNoSimsCombo.getTag())) {mNoSimsCombo.setTag(mSimDetected);/// M:alps03596830 Don't show lack of signal when airplane mode is on.if (mSimDetected && !mIsAirplaneMode) {SignalDrawable d = new SignalDrawable(mNoSims.getContext());d.setDarkIntensity(0);mNoSims.setImageDrawable(d);mNoSims.setImageLevel(SignalDrawable.getEmptyState(4));SignalDrawable dark = new SignalDrawable(mNoSims.getContext());dark.setDarkIntensity(1);mNoSimsDark.setImageDrawable(dark);mNoSimsDark.setImageLevel(SignalDrawable.getEmptyState(4));} else {mNoSims.setImageResource(R.drawable.stat_sys_no_sims);mNoSimsDark.setImageResource(R.drawable.stat_sys_no_sims);}}} else {mIconLogger.onIconHidden(SLOT_MOBILE);mNoSimsCombo.setVisibility(View.GONE);}/// M: Add for Plugin feature @ {mStatusBarExt.setCustomizedNoSimsVisible(mNoSimsVisible);mStatusBarExt.setCustomizedAirplaneView(mNoSimsCombo, mIsAirplaneMode);/// @ }boolean anythingVisible = mNoSimsVisible || mWifiVisible || mIsAirplaneMode|| anyMobileVisible || mVpnVisible || mEthernetVisible;setPaddingRelative(0, 0, anythingVisible ? mEndPadding : mEndPaddingNothingVisible, 0);
}

通过上面的代码发现 apply 控制了 VPN、网卡、wifi、飞行模式、未插入SIM 这几种图标的显示和隐

藏,我们看到里面有另外一个 state.apply(anyMobileVisible) 用来控制 SIM卡相关的图标，接下

来看下都有哪些图标呢？

2、内部类 PhoneState

PhoneState 是 SignalClusterView 中一个内部类，控制volte、网络类型、数据是否打开、信号格

数、漫游等图标

private class PhoneState {//SIM卡idprivate final int mSubId;//SIM卡组是否可见private boolean mMobileVisible = false;//信号格数图标、数据流量是否打开图标(关闭是X，打开是网络类型小图标4G/3G)private int mMobileStrengthId = 0, mMobileTypeId = 0;///M: Add for [Network Type and volte on Statusbar]//网络类型图标private int mNetworkIcon = 0;//volte图标private int mVolteIcon = 0;private int mLastMobileStrengthId = -1;private int mLastMobileTypeId = -1;private boolean mIsMobileTypeIconWide;//网络类型描述，运营商类型，或只能拨打紧急号码private String mMobileDescription, mMobileTypeDescription;//整个PhoneState根本局，SIM信号栏组private ViewGroup mMobileGroup;//信号格控件、流量图标控件、是否漫游控件private ImageView mMobile, mMobileDark, mMobileType, mMobileRoaming;public boolean mRoaming;//手机流量上下行控件private ImageView mMobileActivityIn;private ImageView mMobileActivityOut;public boolean mActivityIn;public boolean mActivityOut;/// M: Add for new features @ {// Add for [Network Type and volte on Statusbar]//网络类型控件private ImageView mNetworkType;//volte控件private ImageView mVolteType;private boolean mIsWfcCase;/// @ }/// M: Add for plugin features. @ {private boolean mDataActivityIn, mDataActivityOut;private ISystemUIStatusBarExt mPhoneStateExt;/// @ }public PhoneState(int subId, Context context) {//加载 mobile_signal_group_ext 布局文件ViewGroup root = (ViewGroup) LayoutInflater.from(context).inflate(R.layout.mobile_signal_group_ext, null);/// M: Add data group for plugin feature. @ {mPhoneStateExt = OpSystemUICustomizationFactoryBase.getOpFactory(context).makeSystemUIStatusBar(context);mPhoneStateExt.addCustomizedView(subId, context, root);/// @ }setViews(root);mSubId = subId;}//控件初始化public void setViews(ViewGroup root) {mMobileGroup    = root;mMobile         = root.findViewById(R.id.mobile_signal);mMobileDark     = root.findViewById(R.id.mobile_signal_dark);mMobileType     = root.findViewById(R.id.mobile_type);///M: Add for [Network Type and volte on Statusbar]mNetworkType    = (ImageView) root.findViewById(R.id.network_type);mVolteType      = (ImageView) root.findViewById(R.id.volte_indicator_ext);mMobileRoaming  = root.findViewById(R.id.mobile_roaming);mMobileActivityIn = root.findViewById(R.id.mobile_in);mMobileActivityOut = root.findViewById(R.id.mobile_out);// TODO: Remove the 2 instances because now the drawable can handle darkness.mMobile.setImageDrawable(new SignalDrawable(mMobile.getContext()));SignalDrawable drawable = new SignalDrawable(mMobileDark.getContext());drawable.setDarkIntensity(1);mMobileDark.setImageDrawable(drawable);}public boolean apply(boolean isSecondaryIcon) {Log.e(TAG, "apply()  mMobileVisible = " + mMobileVisible+ ", mIsAirplaneMode = " + mIsAirplaneMode+ ", mIsWfcEnable = " + mIsWfcEnable+ ", mIsWfcCase = " + mIsWfcCase+ ", mVolteIcon = " + mVolteIcon);if (mMobileVisible && !mIsAirplaneMode) {Log.e(TAG, "apply() into this code 1.. mMobileStrengthId=="+mMobileStrengthId);//设置信号格数if (mLastMobileStrengthId != mMobileStrengthId) {mMobile.getDrawable().setLevel(mMobileStrengthId);mMobileDark.getDrawable().setLevel(mMobileStrengthId);mLastMobileStrengthId = mMobileStrengthId;}//设置流量是否打开if (mLastMobileTypeId != mMobileTypeId) {if (!mPhoneStateExt.disableHostFunction()) {mMobileType.setImageResource(mMobileTypeId);}mLastMobileTypeId = mMobileTypeId;}mMobileGroup.setContentDescription(mMobileTypeDescription+ " " + mMobileDescription);mMobileGroup.setVisibility(View.VISIBLE);showViewInWfcCase();} else {if (mIsAirplaneMode && (mIsWfcEnable && mVolteIcon != 0)) {Log.e(TAG, "apply() into this code 2..");/// M:Bug fix for show vowifi icon in flight modemMobileGroup.setVisibility(View.VISIBLE);hideViewInWfcCase();} else {Log.e(TAG, "apply() into this code 3..");if (DEBUG) {Log.d(TAG, "setVisibility as GONE, this = " + this+ ", mMobileVisible = " + mMobileVisible+ ", mIsAirplaneMode = " + mIsAirplaneMode+ ", mIsWfcEnable = " + mIsWfcEnable+ ", mVolteIcon = " + mVolteIcon);}mMobileGroup.setVisibility(View.GONE);}}/// M: Set all added or customised view. @ {//更新网络类型和volte图标setCustomizeViewProperty();/// @ }// When this isn't next to wifi, give it some extra padding between the signals.mMobileGroup.setPaddingRelative(isSecondaryIcon ? mSecondaryTelephonyPadding : 0,0, 0, 0);mMobile.setPaddingRelative(mIsMobileTypeIconWide ? mWideTypeIconStartPadding : mMobileDataIconStartPadding,0, 0, 0);mMobileDark.setPaddingRelative(mIsMobileTypeIconWide ? mWideTypeIconStartPadding : mMobileDataIconStartPadding,0, 0, 0);if (true) Log.d(TAG, String.format("mobile: %s sig=%d typ=%d",(mMobileVisible ? "VISIBLE" : "GONE"), mMobileStrengthId, mMobileTypeId));Log.e(TAG, "mActivityIn="+mActivityIn+" mActivityOut="+mActivityOut);   if(!mIsWfcCase) {//更新流量是否打开可见性mMobileType.setVisibility(mMobileTypeId != 0 ? View.VISIBLE :View.GONE);//漫游图标mMobileRoaming.setVisibility(mRoaming ? View.VISIBLE : View.GONE);//流量上下行图标mMobileActivityIn.setVisibility(mActivityIn ? View.VISIBLE : View.GONE);mMobileActivityOut.setVisibility(mActivityOut ? View.VISIBLE : View.GONE);}/// M: Add for support plugin featurs. @ {//可通过op01/2/3等加载SystemUI，从6.0延伸来的setCustomizedOpViews();/// @ }return mMobileVisible;}......
}

PhoneState 中的成员变量较多，我在代码里都已经加了注释了，就不细说了。加载的布局文件为

vendor\mediatek\proprietary\packages\apps\SystemUI\res_ext\layout\mobile_signal_group_ext.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Support [Network Type on Statusbar] The layout to wrap original
mobile_signal_group and add image view for show network Type -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_height="wrap_content"android:layout_width="wrap_content"><ImageViewandroid:id="@+id/volte_indicator_ext"android:layout_width="wrap_content"android:layout_height="wrap_content"android:visibility="gone"/><ImageViewandroid:id="@+id/network_type"android:layout_height="wrap_content"android:layout_width="wrap_content"android:visibility="gone"/> <include layout="@layout/mobile_signal_group"/></LinearLayout>

布局文件中对应了 volte 和当前网络类型大图标, 再包含了 mobile_signal_group，里面就是上面提到的各种控件

vendor\mediatek\proprietary\packages\apps\SystemUI\res\layout\mobile_signal_group.xml

3、state.apply(anyMobileVisible) 调用流程

通过上面的分析可以总结下 信号栏的调用流程

NetworkControllerImpl.java 中注册了SIM卡状态改变广播(ACTION_SIM_STATE_CHANGED)，当收

到广播通知后调用到 notifyAllListeners()

通知所有的监听，mobileSignalController、mWifiSignalController、

mEthernetSignalController，分别对应手机信号显示、wifi信号、网卡显示通知

我们看到 mobileSignalController 中的回调 notifyListeners(SignalCallback callback),

在进行一系列的赋值操作后，最终回调到

SignalClusterView 中的 setMobileDataIndicators()，给 PhoneState 的成员变量赋值，

最后通过 apply()进行更新

4、PhoneState创建

通过刚刚对 PhoneState 类的介绍，发现通过构造方法 PhoneState(int subId, Context context) 可获取 PhoneState 对象

搜索当前文件找到在 inflatePhoneState(int subId) 中实例化 PhoneState

@Override
public void setSubs(List<SubscriptionInfo> subs) {if (DEBUG) {Log.d(TAG, "setSubs, this = " + this + ", size = " + subs.size()+ ", subs = " + subs);}if (hasCorrectSubs(subs)) {//判断SIM卡是否改变if (DEBUG) {Log.d(TAG, "setSubs, hasCorrectSubs and return");}return;}mPhoneStates.clear();if (mMobileSignalGroup != null) {mMobileSignalGroup.removeAllViews();//移除手机信号组中的所有view }final int n = subs.size();//SIM卡数量Log.d(TAG, "setSubs-clear subsize:" + subs.size() + "mStes" + mPhoneStates + ":" + this);for (int i = 0; i < n; i++) {inflatePhoneState(subs.get(i).getSubscriptionId());}if (isAttachedToWindow()) {applyIconTint();//图标根据背景色动态变化}
}private PhoneState inflatePhoneState(int subId) {PhoneState state = new PhoneState(subId, mContext);if (mMobileSignalGroup != null) {mMobileSignalGroup.addView(state.mMobileGroup);//添加view到手机信号组中}Log.d(TAG, "inflatePhoneState add subId:" + subId + ",state" + state + ":" + this);mPhoneStates.add(state);//存储PhoneState 对象，方便快速修改状态return state;
}

当SIM卡插入识别后将回调 setSubs(),先判断SIM卡是否改变，有效则移除 mobileGroup 中已添加

所有view，遍历SIM卡数量，通过 subId 创建 PhoneState，并将对应的view添加到 mobileGroup 中。

然后将 PhoneState对象存储到集合中，方便快速修改状态

这里简单说下 subId subid对应卡，slotid对应卡槽

slotid或者phoneid是指卡槽，双卡机器的卡槽1值为0，卡槽2值为1，依次类推

subid的值从1开始，每插入一个新卡，subId的值就会加1。

插入双卡后数据库中就会有subid值为1和2的两个数据条目，

拔卡插卡交换卡槽后，数据库并不会增加新项，只有插入一张新的sim卡才会增加一条id为3的数据条目

详细的介绍请看这篇 subId、slotId

5、SIM卡插入后更新图标流程

PhoneState 创建成功了并存到集合中，当收到 setMobileDataIndicators()回调后

给 PhoneState 成员变量赋值，赋值结束通过apply()更新

还记得上面说过的 apply() 中更新SIM卡图标的逻辑吧，

遍历 mPhoneStates 集合，调用PhoneState的apply()将成员变量值设置给对应的控件

int firstMobileTypeId = 0;for (PhoneState state : mPhoneStates) {if (state.apply(anyMobileVisible)) {if (!anyMobileVisible) {firstMobileTypeId = state.mMobileTypeId;anyMobileVisible = true;}}}

那么 setMobileDataIndicators() 是从哪里回调过来的呢？

分析找到 MobileSignalController 中的 notifyListeners()

vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\android\systemui\statusbar\policy\MobileSignalController.java

@Override
public void notifyListeners(SignalCallback callback) {//获取资源ID组MobileIconGroup icons = getIcons();String contentDescription = getStringIfExists(getContentDescription());String dataContentDescription = getStringIfExists(icons.mDataContentDescription);//移动数据是否开启final boolean dataDisabled = mCurrentState.iconGroup == TelephonyIcons.DATA_DISABLED&& mCurrentState.userSetup;/// M: Customize the signal strength icon id. @ {//当前手机信号格数资源IDint iconId = getCurrentIconId();//用户可自定义的资源ID，该方法将目前的iconId原值赋给了iconID，如需定制可在此修改iconId = mStatusBarExt.getCustomizeSignalStrengthIcon(mSubscriptionInfo.getSubscriptionId(),iconId,mSignalStrength,mDataNetType,mServiceState);/// @ }// Show icon in QS when we are connected or data is disabled.//是否显示移动数据图标boolean showDataIcon = mCurrentState.dataConnected || dataDisabled;//是否显示 mobileGroup、信号格数、SIM卡信息描述IconState statusIcon = new IconState(mCurrentState.enabled && !mCurrentState.airplaneMode,iconId, contentDescription);int qsTypeIcon = 0;IconState qsIcon = null;String description = null;// Only send data sim callbacks to QS.if (mCurrentState.dataSim) {qsTypeIcon = showDataIcon ? icons.mQsDataType : 0;qsIcon = new IconState(mCurrentState.enabled&& !mCurrentState.isEmergency, getQsCurrentIconId(), contentDescription);//状态栏显示只能拨打紧急电话或当前的网络类型description = mCurrentState.isEmergency ? null : mCurrentState.networkName;}//数据下行boolean activityIn = mCurrentState.dataConnected&& !mCurrentState.carrierNetworkChangeMode&& mCurrentState.activityIn;//数据上行boolean activityOut = mCurrentState.dataConnected&& !mCurrentState.carrierNetworkChangeMode&& mCurrentState.activityOut;showDataIcon &= mCurrentState.isDefault || dataDisabled;//移动数据类型资源ID，关闭是X，打开是小的网络类型4G/3G/2Gint typeIcon = showDataIcon ? icons.mDataType : 0;/// M: Add for lwa.typeIcon = mCurrentState.lwaRegState == NetworkTypeUtils.LWA_STATE_CONNCTED&& showDataIcon ? NetworkTypeUtils.LWA_ICON : typeIcon;/** M: Support [Network Type on StatusBar], change the implement methods.* Get the network icon base on service state.* Add one more parameter for network type.* @ { **///当前网络类型资源IDint networkIcon = mCurrentState.networkIcon;/// M: Support volte icon.Bug fix when airplane mode is on go to hide volte icon//VOlTE资源IDint volteIcon = mCurrentState.airplaneMode && !isImsOverWfc()? 0 : mCurrentState.volteIcon;/// M: when data disabled, common show data icon as x, but op do not need show it @ {mStatusBarExt.isDataDisabled(mSubscriptionInfo.getSubscriptionId(), dataDisabled);/// @ }/// M: Customize the data type icon id. @ {//可自定义移动数据类型资源ID（比如常见的上下箭头）typeIcon = mStatusBarExt.getDataTypeIcon(mSubscriptionInfo.getSubscriptionId(),typeIcon,mDataNetType,mCurrentState.dataConnected ? TelephonyManager.DATA_CONNECTED :TelephonyManager.DATA_DISCONNECTED,mServiceState);/// @ }/// M: Customize the network type icon id. @ {//可自定义网络类型资源IDnetworkIcon = mStatusBarExt.getNetworkTypeIcon(mSubscriptionInfo.getSubscriptionId(),networkIcon,mDataNetType,mServiceState);callback.setMobileDataIndicators(statusIcon, qsIcon, typeIcon, networkIcon, volteIcon,qsTypeIcon,activityIn, activityOut, dataContentDescription, description,icons.mIsWide, mSubscriptionInfo.getSubscriptionId(), mCurrentState.roaming);/// M: update plmn label @{mNetworkController.refreshPlmnCarrierLabel();/// @}
}

这个方法比较重要，上面写了简单的注释，接下来我们会详细看下每个资源ID都是如何获取的？

在这之前我们先介绍下几个重要的 Bean 类

vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\android\systemui\statusbar\policy\SignalController.java

State

static class State {boolean connected;boolean enabled;boolean activityIn;boolean activityOut;int level;IconGroup iconGroup;int inetCondition;int rssi;...
}

IconGroup

static class IconGroup {final int[][] mSbIcons;final int[][] mQsIcons;final int[] mContentDesc;final int mSbNullState;final int mQsNullState;final int mSbDiscState;final int mQsDiscState;final int mDiscContentDesc;// For logging.final String mName;....
}

vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\android\systemui\statusbar\policy\MobileSignalController.java

MobileState

static class MobileState extends SignalController.State {String networkName;//当前网络类型String networkNameData;//移动数据网络类型boolean dataSim;boolean dataConnected;//数据是否连接boolean isEmergency;//是否是紧急电话模式boolean airplaneMode;//是否是飞行模式boolean carrierNetworkChangeMode;//SIM卡网络类型是否改变boolean isDefault;boolean userSetup;//是否是用户操作boolean roaming;//是否漫游/// M: Add for 4G+Wint lwaRegState = NetworkTypeUtils.LWA_STATE_UNKNOWN;/// M: For network type big icon.int networkIcon;//网络类型大图标资源ID/// M: Add for data network type.int dataNetType;//移动数据网络类型/// M: Add for op network tower type.int customizedState;//自定义状态/// M: Add for op signal strength tower icon.int customizedSignalStrengthIcon;//自定义信号格资源ID/// M: Add for volte @{int imsRegState = ServiceState.STATE_POWER_OFF;int imsCap;int volteIcon;//volte资源ID......	
}

MobileIconGroup

static class MobileIconGroup extends SignalController.IconGroup {final int mDataContentDescription; // mContentDescriptionDataTypefinal int mDataType;//移动数据网络类型资源IDfinal boolean mIsWide;final int mQsDataType;//下拉快捷访问资源...		
}

好了重要的Bean类介绍完了，接下来又要说一个重要的方法了 updateTelephony()

还是在 MobileSignalController.java 中

private final void updateTelephony() {if (DEBUG && FeatureOptions.LOG_ENABLE) {Log.d(mTag, "updateTelephonySignalStrength: hasService=" + hasService()+ " ss=" + mSignalStrength);}//连接状态，是否在服务中mCurrentState.connected = hasService() && mSignalStrength != null;handleIWLANNetwork();if (mCurrentState.connected) {//SIM 卡信号格数级别 0~4格if (!mSignalStrength.isGsm() && mConfig.alwaysShowCdmaRssi) {mCurrentState.level = mSignalStrength.getCdmaLevel();} else {mCurrentState.level = mSignalStrength.getLevel();}/// M: Customize the signal strength level. @ {//客户可自定义mCurrentState.level = mStatusBarExt.getCustomizeSignalStrengthLevel(mCurrentState.level, mSignalStrength, mServiceState);/// @ }}//当前网络类型获取对应的图标组if (mNetworkToIconLookup.indexOfKey(mDataNetType) >= 0) {mCurrentState.iconGroup = mNetworkToIconLookup.get(mDataNetType);} else {mCurrentState.iconGroup = mDefaultIcons;}/// M: Add for data network type.//数据网络类型mCurrentState.dataNetType = mDataNetType;//数据状态mCurrentState.dataConnected = mCurrentState.connected&& mDataState == TelephonyManager.DATA_CONNECTED;/// M: Add for op network tower type.mCurrentState.customizedState = mStatusBarExt.getCustomizeCsState(mServiceState,mCurrentState.customizedState);/// M: Add for op signal strength tower icon.mCurrentState.customizedSignalStrengthIcon = mStatusBarExt.getCustomizeSignalStrengthIcon(mSubscriptionInfo.getSubscriptionId(),mCurrentState.customizedSignalStrengthIcon,mSignalStrength,mDataNetType,mServiceState);mCurrentState.roaming = isRoaming();if (isCarrierNetworkChangeActive()) {mCurrentState.iconGroup = TelephonyIcons.CARRIER_NETWORK_CHANGE;} else if (isDataDisabled()) {//数据未打开，对应xmCurrentState.iconGroup = TelephonyIcons.DATA_DISABLED;}if (isEmergencyOnly() != mCurrentState.isEmergency) {mCurrentState.isEmergency = isEmergencyOnly();mNetworkController.recalculateEmergency();}// Fill in the network name if we think we have it.//当前网络运营商if (mCurrentState.networkName == mNetworkNameDefault && mServiceState != null&& !TextUtils.isEmpty(mServiceState.getOperatorAlphaShort())) {mCurrentState.networkName = mServiceState.getOperatorAlphaShort();}/// M: For network type big icon. 网络类型大图标mCurrentState.networkIcon =NetworkTypeUtils.getNetworkTypeIcon(mServiceState, mConfig, hasService());/// M: For volte type icon. volte图标mCurrentState.volteIcon = getVolteIcon();//通知更新，最终回调到notifyListeners()中notifyListenersIfNecessary();
}

基本上获取资源ID的方法都在 updateTelephony()中了，那么都在那里调用了 updateTelephony()?

MobileSignalController中构造方法初始化了 MobilePhoneStateListener 分别监听了

mPhone.listen(mPhoneStateListener,
PhoneStateListener.LISTEN_SERVICE_STATE//服务状态改变，可用、不可用| PhoneStateListener.LISTEN_SIGNAL_STRENGTHS//信号强度改变，用于获取dbm、asu| PhoneStateListener.LISTEN_CALL_STATE//电话状态改变，空闲、来电、通话| PhoneStateListener.LISTEN_DATA_CONNECTION_STATE//数据网络连接状态，网络断开、正在连接中、已连接上| PhoneStateListener.LISTEN_DATA_ACTIVITY//数据上下行状态| PhoneStateListener.LISTEN_CARRIER_NETWORK_CHANGE);//网络状态发送改变class MobilePhoneStateListener extends PhoneStateListener {public MobilePhoneStateListener(int subId, Looper looper) {super(subId, looper);}@Overridepublic void onSignalStrengthsChanged(SignalStrength signalStrength) {...updateTelephony();}@Overridepublic void onServiceStateChanged(ServiceState state) {...updateTelephony();}@Overridepublic void onDataConnectionStateChanged(int state, int networkType) {...updateTelephony();}@Overridepublic void onDataActivity(int direction) {...setActivity(direction);}@Overridepublic void onCarrierNetworkChange(boolean active) {...updateTelephony();}/// M: Add for Plugin feature. @{@Overridepublic void onCallStateChanged(int state, String incomingNumber) {...updateTelephony();}/// @}
};

LISTEN_SIGNAL_STRENGTHS、LISTEN_CALL_STATE、LISTEN_CARRIER_NETWORK_CHANGE

这三个监听应该是我们平常用较多的，好了说了这么久，接下来重要看获取资源ID的具体方法了

5.1、Vlote资源ID

mCurrentState.volteIcon = getVolteIcon();private int getVolteIcon() {int icon = 0;if (isImsOverWfc()) {boolean needShowWfcSysIcon = mStatusBarExt.needShowWfcIcon();if (needShowWfcSysIcon) {icon = NetworkTypeUtils.WFC_ICON;}} else if (isImsOverVoice() && isLteNetWork()) {if (mCurrentState.imsRegState == ServiceState.STATE_IN_SERVICE) {//volte可用icon = NetworkTypeUtils.VOLTE_ICON;} else if(FeatureOptions.MTK_CT_MIXED_VOLTE_SUPPORT &&SIMHelper.isSecondaryCSIMForMixedVolte(mSubscriptionInfo.getSubscriptionId()) &&mCurrentState.imsRegState == ServiceState.STATE_OUT_OF_SERVICE) {if (DEBUG) {Log.d(mTag, "set dis volte icon");}//volte不可用icon = NetworkTypeUtils.VOLTE_DIS_ICON;}}/// M: add for disconnected volte feature. @{mStatusBarExt.setImsRegInfo(mSubscriptionInfo.getSubscriptionId(),mCurrentState.imsRegState, isImsOverWfc(), isImsOverVoice());/// @}return icon;
}

vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\mediatek\systemui\statusbar\networktype\NetworkTypeUtils.java

public static final int VOLTE_ICON = R.drawable.stat_sys_volte;

5.2、网络类型大图标资源ID

vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\mediatek\systemui\statusbar\networktype\NetworkTypeUtils.java

mCurrentState.networkIcon =NetworkTypeUtils.getNetworkTypeIcon(mServiceState, mConfig, hasService());public static int getNetworkTypeIcon(ServiceState serviceState, Config config,boolean hasService) {if (!hasService) {// Not in service, no network type. 未注册成功，比如废卡、停机卡return 0;}//通过 serviceState 获取当前注册的网络类型int tempNetworkType = getNetworkType(serviceState);Integer iconId = sNetworkTypeIcons.get(tempNetworkType);if (iconId == null) {iconId = tempNetworkType == TelephonyManager.NETWORK_TYPE_UNKNOWN ? 0 :config.showAtLeast3G ? R.drawable.stat_sys_network_type_3g :R.drawable.stat_sys_network_type_g;}return iconId.intValue();
}private static int getNetworkType(ServiceState serviceState) {int type = TelephonyManager.NETWORK_TYPE_UNKNOWN;if (serviceState != null) {type = serviceState.getDataNetworkType() != TelephonyManager.NETWORK_TYPE_UNKNOWN ?serviceState.getDataNetworkType() : serviceState.getVoiceNetworkType();}return type;
}//网络类型-资源ID    4g/3g/2g/e/1x
static final Map<Integer, Integer> sNetworkTypeIcons = new HashMap<Integer, Integer>() {{// For CDMA 3Gput(TelephonyManager.NETWORK_TYPE_EVDO_0, R.drawable.stat_sys_network_type_3g);put(TelephonyManager.NETWORK_TYPE_EVDO_A, R.drawable.stat_sys_network_type_3g);put(TelephonyManager.NETWORK_TYPE_EVDO_B, R.drawable.stat_sys_network_type_3g);put(TelephonyManager.NETWORK_TYPE_EHRPD, R.drawable.stat_sys_network_type_3g);// For CDMA 1xput(TelephonyManager.NETWORK_TYPE_CDMA, R.drawable.stat_sys_network_type_1x);put(TelephonyManager.NETWORK_TYPE_1xRTT, R.drawable.stat_sys_network_type_1x);// Edgeput(TelephonyManager.NETWORK_TYPE_EDGE, R.drawable.stat_sys_network_type_e);// 3Gput(TelephonyManager.NETWORK_TYPE_UMTS, R.drawable.stat_sys_network_type_3g);// For 4Gput(TelephonyManager.NETWORK_TYPE_LTE, R.drawable.stat_sys_network_type_4g);// 3Gput(TelephonyManager.NETWORK_TYPE_HSDPA, R.drawable.stat_sys_network_type_3g);put(TelephonyManager.NETWORK_TYPE_HSUPA, R.drawable.stat_sys_network_type_3g);put(TelephonyManager.NETWORK_TYPE_HSPA, R.drawable.stat_sys_network_type_3g);put(TelephonyManager.NETWORK_TYPE_HSPAP, R.drawable.stat_sys_network_type_3g);put(TelephonyManager.NETWORK_TYPE_IWLAN, 0);}
};

5.3、移动数据类型资源ID

//mNetworkToIconLookup 和上面的网络类型 Map有点类似，键都是网络类型，
//不同的是，这次的key是上面介绍过的 MobileIconGroup
if (mNetworkToIconLookup.indexOfKey(mDataNetType) >= 0) {mCurrentState.iconGroup = mNetworkToIconLookup.get(mDataNetType);
} else {mCurrentState.iconGroup = mDefaultIcons;
}if (isCarrierNetworkChangeActive()) {mCurrentState.iconGroup = TelephonyIcons.CARRIER_NETWORK_CHANGE;
} else if (isDataDisabled()) {mCurrentState.iconGroup = TelephonyIcons.DATA_DISABLED;
}

vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\android\systemui\statusbar\policy\TelephonyIcons.java

class TelephonyIcons {//***** Data connection icons//状态栏快捷访问，其实和下面的差多不static final int QS_DATA_G = R.drawable.ic_qs_signal_g;static final int QS_DATA_3G = R.drawable.ic_qs_signal_3g;static final int QS_DATA_E = R.drawable.ic_qs_signal_e;static final int QS_DATA_H = R.drawable.ic_qs_signal_h;static final int QS_DATA_1X = R.drawable.ic_qs_signal_1x;static final int QS_DATA_4G = R.drawable.ic_qs_signal_4g;static final int QS_DATA_4G_PLUS = R.drawable.ic_qs_signal_4g_plus;static final int QS_DATA_LTE = R.drawable.ic_qs_signal_lte;static final int QS_DATA_LTE_PLUS = R.drawable.ic_qs_signal_lte_plus;static final int FLIGHT_MODE_ICON = R.drawable.stat_sys_airplane_mode;//此处的图标为小图标，网络类型static final int ICON_LTE = R.drawable.stat_sys_data_fully_connected_lte;static final int ICON_LTE_PLUS = R.drawable.stat_sys_data_fully_connected_lte_plus;static final int ICON_G = R.drawable.stat_sys_data_fully_connected_g;static final int ICON_E = R.drawable.stat_sys_data_fully_connected_e;static final int ICON_H = R.drawable.stat_sys_data_fully_connected_h;static final int ICON_3G = R.drawable.stat_sys_data_fully_connected_3g;static final int ICON_4G = R.drawable.stat_sys_data_fully_connected_4g;static final int ICON_4G_PLUS = R.drawable.stat_sys_data_fully_connected_4g_plus;static final int ICON_1X = R.drawable.stat_sys_data_fully_connected_1x;//流量未打开static final int ICON_DATA_DISABLED = R.drawable.stat_sys_data_disabled;static final int QS_ICON_DATA_DISABLED = R.drawable.ic_qs_data_disabled;...static final MobileIconGroup DATA_DISABLED = new MobileIconGroup("DataDisabled",null,null,AccessibilityContentDescriptions.PHONE_SIGNAL_STRENGTH,0, 0,0,0,AccessibilityContentDescriptions.PHONE_SIGNAL_STRENGTH[0],R.string.accessibility_cell_data_off,TelephonyIcons.ICON_DATA_DISABLED,//这个值对应的就是 移动数据类型资源IDfalse,TelephonyIcons.QS_ICON_DATA_DISABLED);}

MobileIconGroup 的倒数第三个参数就是 移动数据类型资源ID

5.4、信号格数资源ID

if (mCurrentState.connected) {if (!mSignalStrength.isGsm() && mConfig.alwaysShowCdmaRssi) {mCurrentState.level = mSignalStrength.getCdmaLevel();} else {mCurrentState.level = mSignalStrength.getLevel();}/// M: Customize the signal strength level. @ {mCurrentState.level = mStatusBarExt.getCustomizeSignalStrengthLevel(mCurrentState.level, mSignalStrength, mServiceState);/// @ }}

信号格数对应的是 SignalDrawable，通过 setLevel()来控制显示几格，其实以上的大部分资源ID都是

通过 Vector 标签绘制而来的，里面都是一堆 path，开始看可能会觉得很迷糊，可以把xml文件拷贝到

AS中进行预览，再学上一些基础语法就可对简单的图形进行自定义修改。比方说6.0的信号格数是通过

vector 绘制的，格与格之间是有间隔，而8.1是通过 SignalDrawable绘制，是一个填满的三角形

修改前样式

修改后样式

来看下 mSignalStrength.getLevel() 方法

frameworks/base/telephony/java/android/telephony/SignalStrength.java

    public int getLevel() {int level = 0;if (isGsm) { //移动或联通卡level = getLteLevel(); //首先获取4G信号格if (level == SIGNAL_STRENGTH_NONE_OR_UNKNOWN) { //未获取到level = getTdScdmaLevel(); //获取移动或联通的3G信号格if (level == SIGNAL_STRENGTH_NONE_OR_UNKNOWN) {//仍然未获取level = getGsmLevel(); //获取移动或联通的2G信号格}}} else {//电信int cdmaLevel = getCdmaLevel(); //获取电信2G信号格int evdoLevel = getEvdoLevel(); //获取电信3G信号格if (evdoLevel == SIGNAL_STRENGTH_NONE_OR_UNKNOWN) {/* We don't know evdo, use cdma */level = cdmaLevel;} else if (cdmaLevel == SIGNAL_STRENGTH_NONE_OR_UNKNOWN) {/* We don't know cdma, use evdo */level = evdoLevel;} else {/* We know both, use the lowest level */level = cdmaLevel < evdoLevel ? cdmaLevel : evdoLevel;}}if (DBG) log("getLevel=" + level);return level;
}

在此介绍下手机是几模的配置：GSM是移动和联通公用的band；LTE从编码方式上分为TDD和FDD，从频段上分有各种不同的band

移动：GSM、TDSCDMA、LTE(TDD)

联通：GSM、WCDMA、LTE(FDD)

电信：CDMA、EVDO、LTE(FDD)

因此如果手机支持GSM、WCDMA、TDSCDMA、TDD-LTE、FDD-LTE 这是五模；加上 CDMA、EVDO 就是七模

5.5、漫游资源ID R.drawable.stat_sys_roaming

大写的R

三、总结

信号栏的定制还是很容易的，只要理清楚了控件和对应的回调逻辑，加上日志打印，就能搞定你想要的效果。

四、相关资源

这里附上我定制使用的drawable文件，CSDN有点坑啊，我想传免费的来着，非要给我设置5分，好吧，只好换平台改链接免费下载

drawable.zip

这篇关于Android8.1 MTK平台 SystemUI源码分析之 网络信号栏显示刷新的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！

---