SystemUI SystemBars的启动流程
不积跬步无以至千里
SystemBars的启动包含了状态栏与导航栏的启动,是SystemUI中较为重要的一个功能模块,下边说一下它的启动流程.
接着上一次讲的,上次说到每个功能模块都是继承自SystemUI.java,然后实现了start()抽象方法,然后通过循环启动了各个功能模块,而我们今天的讲的这个SystemBars肯定也是在启动之一.
一.SystemBars.java
代码路径:
code/app/src/com/android/systemui/SystemBars.java
1.
/**
* Ensure a single status bar service implementation is running at all times, using the in-process
* implementation according to the product config.
*/
public class SystemBars extends SystemUI {
这里说到确保一个StatusBar的服务实现一直在运行在所有时间里在这进程.
2.
循环遍历调用的start方法.
@Override
public void start() {
if (DEBUG) Log.d(TAG, "start");
createStatusBarFromConfig();
}
private void createStatusBarFromConfig() {
if (DEBUG) Log.d(TAG, "createStatusBarFromConfig");
//通过读取资源文件获取的要启动的类,com.android.systemui.statusbar.phone.StatusBar
//android源码中还支持CarStatusBar与TvStatusBar这两种模式
final String clsName = mContext.getString(R.string.config_statusBarComponent);
if (clsName == null || clsName.length() == 0) {
throw andLog("No status bar component configured", null);
}
Class cls = null;
try {
cls = mContext.getClassLoader().loadClass(clsName);
} catch (Throwable t) {
throw andLog("Error loading status bar component: " + clsName, t);
}
try {
//通过反射获取到要启动的对象.
mStatusBar = (SystemUI) cls.newInstance();
} catch (Throwable t) {
throw andLog("Error creating status bar component: " + clsName, t);
}
mStatusBar.mContext = mContext;
mStatusBar.mComponents = mComponents;
//调用对象的start方法
mStatusBar.start();
if (DEBUG) Log.d(TAG, "started " + mStatusBar.getClass().getSimpleName());
}
二.StatusBar.java
代码路径:
app/src/com/android/systemui/statusbar/phone/StatusBar.java
1.
@Override
public void start() {
//初始化各种系统服务与观察者
mNetworkController = Dependency.get(NetworkController.class);
mUserSwitcherController = Dependency.get(UserSwitcherController.class);
mScreenLifecycle = Dependency.get(ScreenLifecycle.class);
mScreenLifecycle.addObserver(mScreenObserver);
mWakefulnessLifecycle = Dependency.get(WakefulnessLifecycle.class);
mWakefulnessLifecycle.addObserver(mWakefulnessObserver);
mBatteryController = Dependency.get(BatteryController.class);
mAssistManager = Dependency.get(AssistManager.class);
mSystemServicesProxy = SystemServicesProxy.getInstance(mContext);
mOverlayManager = IOverlayManager.Stub.asInterface(
ServiceManager.getService(Context.OVERLAY_SERVICE));
mColorExtractor = Dependency.get(SysuiColorExtractor.class);
mColorExtractor.addOnColorsChangedListener(this);
mWindowManager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
mForegroundServiceController = Dependency.get(ForegroundServiceController.class);
//获取屏幕参数
mDisplay = mWindowManager.getDefaultDisplay();
updateDisplaySize();
...
//与StatusBarManagerService注册实现通讯,状态栏的下拉禁止等等外部接口
// Connect in to the status bar manager service
mCommandQueue = getComponent(CommandQueue.class);
mCommandQueue.addCallbacks(this);
int[] switches = new int[9];
ArrayList binders = new ArrayList<>();
ArrayList iconSlots = new ArrayList<>();
ArrayList icons = new ArrayList<>();
Rect fullscreenStackBounds = new Rect();
Rect dockedStackBounds = new Rect();
try {
mBarService.registerStatusBar(mCommandQueue, iconSlots, icons, switches, binders,
fullscreenStackBounds, dockedStackBounds);
} catch (RemoteException ex) {
// If the system process isn't there we're doomed anyway.
}
//状态栏与导航栏的View与窗口的初始化
createAndAddWindows();
mCommandQueue.disable(switches[0], switches[6], false /* animate */);
setSystemUiVisibility(switches[1], switches[7], switches[8], 0xffffffff,
fullscreenStackBounds, dockedStackBounds);
topAppWindowChanged(switches[2] != 0);
...
//初始化状态栏icon
// Set up the initial icon state
int N = iconSlots.size();
for (int i=0; i < N; i++) {
mCommandQueue.setIcon(iconSlots.get(i), icons.get(i));
}
//注册与NotificationManagerService实现通信,通知的刷新.
// Set up the initial notification state.
try {
mNotificationListener.registerAsSystemService(mContext,
new ComponentName(mContext.getPackageName(), getClass().getCanonicalName()),
UserHandle.USER_ALL);
} catch (RemoteException e) {
Log.e(TAG, "Unable to register notification listener", e);
}
//锁屏View的初始化
startKeyguard();
2.状态栏与导航栏View与窗口的初始化
createAndAddWindows()
1.
public void createAndAddWindows() {
addStatusBarWindow();
}
private void addStatusBarWindow() {
makeStatusBarView();
mStatusBarWindowManager = Dependency.get(StatusBarWindowManager.class);
mRemoteInputController = new RemoteInputController(mHeadsUpManager);
//StatusBar的窗口的添加
mStatusBarWindowManager.add(mStatusBarWindow, getStatusBarHeight());
}
protected void makeStatusBarView() {
final Context context = mContext;
//获取屏幕的参数
updateDisplaySize(); // populates mDisplayMetrics
//更新一些设置,布局的参数,通知的锁屏最多显示
updateResources();
//更新主题,Theme_SystemUI_Light,Theme_SystemUI,有两种其中为黑色与青色.
//其中会重新创建锁屏第一界面的图标与提示区域的对象,这里在人脸识别出现了bug
updateTheme();
//super_status_bar,根布局对象
inflateStatusBarWindow(context);
mStatusBarWindow.setService(this);
//设置它的touch事件
mStatusBarWindow.setOnTouchListener(getStatusBarWindowTouchListener());
//通知的布局等初始化
mNotificationPanel = (NotificationPanelView) mStatusBarWindow.findViewById(
R.id.notification_panel);
mStackScroller = (NotificationStackScrollLayout) mStatusBarWindow.findViewById(
R.id.notification_stack_scroller);
...
//状态栏初始化
FragmentHostManager.get(mStatusBarWindow)
.addTagListener(CollapsedStatusBarFragment.TAG, (tag, fragment) -> {
CollapsedStatusBarFragment statusBarFragment =
(CollapsedStatusBarFragment) fragment;
statusBarFragment.initNotificationIconArea(mNotificationIconAreaController);
mStatusBarView = (PhoneStatusBarView) fragment.getView();
mStatusBarView.setBar(this);
mStatusBarView.setPanel(mNotificationPanel);
mStatusBarView.setScrimController(mScrimController);
mStatusBarView.setBouncerShowing(mBouncerShowing);
mStatusBarContents = mStatusBarView.findViewById(R.id.status_bar_contents);
mCarrierLabelView = mStatusBarContents.findViewById(R.id.ssui_carrier_label_view);
mNetworkController.addCarrierLabel(mCarrierLabelView);
setAreThereNotifications();
checkBarModes();
}).getFragmentManager()
.beginTransaction()
.replace(R.id.status_bar_container, new CollapsedStatusBarFragment(),
CollapsedStatusBarFragment.TAG)
.commit();
mIconController = Dependency.get(StatusBarIconController.class);
//悬浮通知管理的初始化
mHeadsUpManager = new HeadsUpManager(context, mStatusBarWindow, mGroupManager);
mHeadsUpManager.setBar(this);
mHeadsUpManager.addListener(this);
mHeadsUpManager.addListener(mNotificationPanel);
mHeadsUpManager.addListener(mGroupManager);
mHeadsUpManager.addListener(mVisualStabilityManager);
...
//创建初始化导航栏
try {
boolean showNav = mWindowManagerService.hasNavigationBar();
if (DEBUG) Log.v(TAG, "hasNavigationBar=" + showNav);
if (showNav) {
KeyguardUpdateMonitor.getInstance(context).registerCallback(sKeyguardCallback);
createNavigationBar();
}
} catch (RemoteException ex) {
// no window manager? good luck with that
}
//通知的长按
mStackScroller.setLongPressListener(getNotificationLongClicker());
mStackScroller.setStatusBar(this);
mStackScroller.setGroupManager(mGroupManager);
mStackScroller.setHeadsUpManager(mHeadsUpManager);
mGroupManager.setOnGroupChangeListener(mStackScroller);
//锁屏第一屏提示文字区域对象
mKeyguardIndicationController =
SystemUIFactory.getInstance().createKeyguardIndicationController(mContext,
(ViewGroup) mStatusBarWindow.findViewById(R.id.keyguard_indication_area),
mNotificationPanel.getLockIcon());
...
//前后蒙层,以及悬浮通知蒙层
ScrimView scrimBehind = (ScrimView) mStatusBarWindow.findViewById(R.id.scrim_behind);
ScrimView scrimInFront = (ScrimView) mStatusBarWindow.findViewById(R.id.scrim_in_front);
View headsUpScrim = mStatusBarWindow.findViewById(R.id.heads_up_scrim);
mScrimController = SystemUIFactory.getInstance().createScrimController(mLightBarController,
scrimBehind, scrimInFront, headsUpScrim, mLockscreenWallpaper,
scrimsVisible -> {
if (mStatusBarWindowManager != null) {
mStatusBarWindowManager.setScrimsVisible(scrimsVisible);
}
});
//QuickSettings的初始化
// Set up the quick settings tile panel
View container = mStatusBarWindow.findViewById(R.id.qs_frame);
if (container != null) {
FragmentHostManager fragmentHostManager = FragmentHostManager.get(container);
ExtensionFragmentListener.attachExtensonToFragment(container, QS.TAG, R.id.qs_frame,
Dependency.get(ExtensionController.class).newExtension(QS.class)
.withPlugin(QS.class)
.withFeature(
PackageManager.FEATURE_AUTOMOTIVE, () -> new CarQSFragment())
.withDefault(() -> new QSFragment())
.build());
final QSTileHost qsh = SystemUIFactory.getInstance().createQSTileHost(mContext, this,
mIconController);
mBrightnessMirrorController = new BrightnessMirrorController(mStatusBarWindow,
mScrimController);
fragmentHostManager.addTagListener(QS.TAG, (tag, f) -> {
QS qs = (QS) f;
if (qs instanceof QSFragment) {
((QSFragment) qs).setHost(qsh);
mQSPanel = ((QSFragment) qs).getQsPanel();
mQSPanel.setBrightnessMirror(mBrightnessMirrorController);
mKeyguardStatusBar.setQSPanel(mQSPanel);
}
});
}
...
3.根布局
super_status_bar.xml
SystemBars的初始化就先到这.