本文基于Android8.1系统进行测试 一、四种LaunchMode 1. standard 默认方式，每次 […]
7月 202020
7月 152020
一. ResolveInfo 用于根据intent获取AndroidManifest.xml中的Activ […]
7月 072020
一、Art的诞生 Art是在Android4.4系统中加入的，但是默认是不开启的 Art和Dalvik […]
7月 072020
本文基于Android8.1系统进行研究 一、启动zygote 在Linux内核启动完成后，首先启动系统的第一 […]
Laravel框架在执行ajax请求时附带token
分类：Javascript, Others, PHP
Laravel框架在执行ajax请求时附带token已关闭评论
7月 042020
代码如下：
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<script> function updateHomeSummary(){ $.ajaxSetup({ headers: { 'X-CSRF-TOKEN' : '{{ csrf_token() }}' } }); $.ajax({ type: "POST", url: "homedatasummary", dataType: "json", success: function (data) { }, error: function(XMLHttpRequest, textStatus, errorThrown) { } }); } </script> |
其中，ajax前面这段代码是用来 […]
6月 132020
解决办法： 打开build.gradle文件，增加如下maven仓库地址： 文字版： [crayon-6767 […]
6月 032020
基于Android8.1系统源码中的注释翻译 翻译如下： 在一个Activity被杀死之前被调用以取出Ac […]
6月 012020
本文 基于Android8.1系统
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protected void makeStatusBarView() { final Context context = mContext; // 用于重新获取mDisplayMetrics和mCurrentDisplaySize updateDisplaySize(); // populates mDisplayMetrics // 重新加载QSPanel、NotificationPanel等的资源，因为可能configuration可能会有变化 updateResources(); updateTheme(); // 用布局R.layout.super_status_bar填充mStatusBarWindow inflateStatusBarWindow(context); mStatusBarWindow.setService(this); mStatusBarWindow.setOnTouchListener(getStatusBarWindowTouchListener()); // mNotificationPanel用于显示各种各种通知的根Panel // TODO: Deal with the ugliness that comes from having some of the statusbar broken out // into fragments, but the rest here, it leaves some awkward lifecycle and whatnot. mNotificationPanel = (NotificationPanelView) mStatusBarWindow.findViewById( R.id.notification_panel); // mStackScroller用于显示列表形式的系统通知 mStackScroller = (NotificationStackScrollLayout) mStatusBarWindow.findViewById( R.id.notification_stack_scroller); mNotificationPanel.setStatusBar(this); mNotificationPanel.setGroupManager(mGroupManager); mAboveShelfObserver = new AboveShelfObserver(mStackScroller); mAboveShelfObserver.setListener(mStatusBarWindow.findViewById( R.id.notification_container_parent)); mKeyguardStatusBar = (KeyguardStatusBarView) mStatusBarWindow.findViewById(R.id.keyguard_header); mNotificationIconAreaController = SystemUIFactory.getInstance() .createNotificationIconAreaController(context, this); inflateShelf(); mNotificationIconAreaController.setupShelf(mNotificationShelf); Dependency.get(DarkIconDispatcher.class).addDarkReceiver(mNotificationIconAreaController); 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); setAreThereNotifications(); checkBarModes(); }).getFragmentManager() .beginTransaction() .replace(R.id.status_bar_container, new CollapsedStatusBarFragment(), CollapsedStatusBarFragment.TAG) .commit(); mIconController = Dependency.get(StatusBarIconController.class); mHeadsUpManager = new HeadsUpManager(context, mStatusBarWindow, mGroupManager); mHeadsUpManager.setBar(this); mHeadsUpManager.addListener(this); mHeadsUpManager.addListener(mNotificationPanel); mHeadsUpManager.addListener(mGroupManager); mHeadsUpManager.addListener(mVisualStabilityManager); mNotificationPanel.setHeadsUpManager(mHeadsUpManager); mNotificationData.setHeadsUpManager(mHeadsUpManager); mGroupManager.setHeadsUpManager(mHeadsUpManager); mHeadsUpManager.setVisualStabilityManager(mVisualStabilityManager); if (MULTIUSER_DEBUG) { mNotificationPanelDebugText = (TextView) mNotificationPanel.findViewById( R.id.header_debug_info); mNotificationPanelDebugText.setVisibility(View.VISIBLE); } try { boolean showNav = mWindowManagerService.hasNavigationBar(); if (DEBUG) Log.v(TAG, "hasNavigationBar=" + showNav); if (showNav) { createNavigationBar(); } } catch (RemoteException ex) { // no window manager? good luck with that } // figure out which pixel-format to use for the status bar. mPixelFormat = PixelFormat.OPAQUE; // 通知列表框 mStackScroller.setLongPressListener(getNotificationLongClicker()); mStackScroller.setStatusBar(this); mStackScroller.setGroupManager(mGroupManager); mStackScroller.setHeadsUpManager(mHeadsUpManager); mGroupManager.setOnGroupChangeListener(mStackScroller); mVisualStabilityManager.setVisibilityLocationProvider(mStackScroller); // 没有通知提示框 inflateEmptyShadeView(); // 清除所有通知提示框 inflateDismissView(); mExpandedContents = mStackScroller; // 包含多媒体插图、图片的View？不知道是干啥用的 mBackdrop = (BackDropView) mStatusBarWindow.findViewById(R.id.backdrop); mBackdropFront = (ImageView) mBackdrop.findViewById(R.id.backdrop_front); mBackdropBack = (ImageView) mBackdrop.findViewById(R.id.backdrop_back); // 字面翻译：锁屏壁纸 if (ENABLE_LOCKSCREEN_WALLPAPER) { mLockscreenWallpaper = new LockscreenWallpaper(mContext, this, mHandler); } mKeyguardIndicationController = SystemUIFactory.getInstance().createKeyguardIndicationController(mContext, (ViewGroup) mStatusBarWindow.findViewById(R.id.keyguard_indication_area), mNotificationPanel.getLockIcon()); mNotificationPanel.setKeyguardIndicationController(mKeyguardIndicationController); mAmbientIndicationContainer = mStatusBarWindow.findViewById( R.id.ambient_indication_container); // set the initial view visibility setAreThereNotifications(); // TODO: Find better place for this callback. mBatteryController.addCallback(new BatteryStateChangeCallback() { @Override public void onPowerSaveChanged(boolean isPowerSave) { mHandler.post(mCheckBarModes); if (mDozeServiceHost != null) { mDozeServiceHost.firePowerSaveChanged(isPowerSave); } } @Override public void onBatteryLevelChanged(int level, boolean pluggedIn, boolean charging) { // noop } }); mLightBarController = Dependency.get(LightBarController.class); if (mNavigationBar != null) { mNavigationBar.setLightBarController(mLightBarController); } 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); } }); if (mScrimSrcModeEnabled) { Runnable runnable = new Runnable() { @Override public void run() { boolean asSrc = mBackdrop.getVisibility() != View.VISIBLE; mScrimController.setDrawBehindAsSrc(asSrc); mStackScroller.setDrawBackgroundAsSrc(asSrc); } }; mBackdrop.setOnVisibilityChangedRunnable(runnable); runnable.run(); } mHeadsUpManager.addListener(mScrimController); mStackScroller.setScrimController(mScrimController); mDozeScrimController = new DozeScrimController(mScrimController, context); // Other icons mVolumeComponent = getComponent(VolumeComponent.class); mNotificationPanel.setUserSetupComplete(mUserSetup); if (UserManager.get(mContext).isUserSwitcherEnabled()) { createUserSwitcher(); } // 配置快速设置小按钮的面板 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); } }); } mReportRejectedTouch = mStatusBarWindow.findViewById(R.id.report_rejected_touch); if (mReportRejectedTouch != null) { updateReportRejectedTouchVisibility(); mReportRejectedTouch.setOnClickListener(v -> { Uri session = mFalsingManager.reportRejectedTouch(); if (session == null) { return; } StringWriter message = new StringWriter(); message.write("Build info: "); message.write(SystemProperties.get("ro.build.description")); message.write("\nSerial number: "); message.write(SystemProperties.get("ro.serialno")); message.write("\n"); PrintWriter falsingPw = new PrintWriter(message); FalsingLog.dump(falsingPw); falsingPw.flush(); startActivityDismissingKeyguard(Intent.createChooser(new Intent(Intent.ACTION_SEND) .setType("*/*") .putExtra(Intent.EXTRA_SUBJECT, "Rejected touch report") .putExtra(Intent.EXTRA_STREAM, session) .putExtra(Intent.EXTRA_TEXT, message.toString()), "Share rejected touch report") .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK), true /* onlyProvisioned */, true /* dismissShade */); }); } PowerManager pm = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE); if (!pm.isScreenOn()) { mBroadcastReceiver.onReceive(mContext, new Intent(Intent.ACTION_SCREEN_OFF)); } mGestureWakeLock = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, "GestureWakeLock"); mVibrator = mContext.getSystemService(Vibrator.class); int[] pattern = mContext.getResources().getIntArray( R.array.config_cameraLaunchGestureVibePattern); mCameraLaunchGestureVibePattern = new long[pattern.length]; for (int i = 0; i < pattern.length; i++) { mCameraLaunchGestureVibePattern[i] = pattern[i]; } // receive broadcasts IntentFilter filter = new IntentFilter(); filter.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS); filter.addAction(Intent.ACTION_SCREEN_OFF); filter.addAction(DevicePolicyManager.ACTION_SHOW_DEVICE_MONITORING_DIALOG); context.registerReceiverAsUser(mBroadcastReceiver, UserHandle.ALL, filter, null, null); IntentFilter demoFilter = new IntentFilter(); if (DEBUG_MEDIA_FAKE_ARTWORK) { demoFilter.addAction(ACTION_FAKE_ARTWORK); } demoFilter.addAction(ACTION_DEMO); context.registerReceiverAsUser(mDemoReceiver, UserHandle.ALL, demoFilter, android.Manifest.permission.DUMP, null); // listen for USER_SETUP_COMPLETE setting (per-user) mDeviceProvisionedController.addCallback(mUserSetupObserver); mUserSetupObserver.onUserSetupChanged(); // disable profiling bars, since they overlap and clutter the output on app windows ThreadedRenderer.overrideProperty("disableProfileBars", "true"); // Private API call to make the shadows look better for Recents ThreadedRenderer.overrideProperty("ambientRatio", String.valueOf(1.5f)); } |
&nbs […]
5月 282020
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if (r.app != null && r.app.thread != null) { // If service is currently running. return true; } |
5月 282020
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int bindServiceLocked(IApplicationThread caller, IBinder token, Intent service, String resolvedType, final IServiceConnection connection, int flags, String callingPackage, final int userId) throws TransactionTooLargeException { if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, "bindService: " + service + " type=" + resolvedType + " conn=" + connection.asBinder() + " flags=0x" + Integer.toHexString(flags)); // 获取调用bindService的进程信息，如果进程信息不存在，则报异常。为什么会不存在？ final ProcessRecord callerApp = mAm.getRecordForAppLocked(caller); if (callerApp == null) { throw new SecurityException( "Unable to find app for caller " + caller + " (pid=" + Binder.getCallingPid() + ") when binding service " + service); } ActivityRecord activity = null; // 这个token对应的是ContextImpl中的getActivityToken()，如果在一个Service中bind其他的Service，这个token是不是就是null了？ if (token != null) { // 在Activity栈中看是否有调用的Activity，如果没有，则返回 activity = ActivityRecord.isInStackLocked(token); if (activity == null) { Slog.w(TAG, "Binding with unknown activity: " + token); return 0; } } int clientLabel = 0; PendingIntent clientIntent = null; final boolean isCallerSystem = callerApp.info.uid == Process.SYSTEM_UID; // 这里看不太懂 if (isCallerSystem) { // Hacky kind of thing -- allow system stuff to tell us // what they are, so we can report this elsewhere for // others to know why certain services are running. service.setDefusable(true); clientIntent = service.getParcelableExtra(Intent.EXTRA_CLIENT_INTENT); if (clientIntent != null) { clientLabel = service.getIntExtra(Intent.EXTRA_CLIENT_LABEL, 0); if (clientLabel != 0) { // There are no useful extras in the intent, trash them. // System code calling with this stuff just needs to know // this will happen. service = service.cloneFilter(); } } } // 把要绑定的服务看作一个Activity？后面还有相关的判断 if ((flags&Context.BIND_TREAT_LIKE_ACTIVITY) != 0) { // 检查权限，如果没有权限会直接报异常结束函数 mAm.enforceCallingPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS, "BIND_TREAT_LIKE_ACTIVITY"); } // 如果要请求管理白名单，但又不是系统应用，则报异常 if ((flags & Context.BIND_ALLOW_WHITELIST_MANAGEMENT) != 0 && !isCallerSystem) { throw new SecurityException( "Non-system caller " + caller + " (pid=" + Binder.getCallingPid() + ") set BIND_ALLOW_WHITELIST_MANAGEMENT when binding service " + service); } // 调用者在前台？ final boolean callerFg = callerApp.setSchedGroup != ProcessList.SCHED_GROUP_BACKGROUND; final boolean isBindExternal = (flags & Context.BIND_EXTERNAL_SERVICE) != 0; //ServiceLookupResult包含一个ServiceRecord成员和一个权限字符串 ServiceLookupResult res = retrieveServiceLocked(service, resolvedType, callingPackage, Binder.getCallingPid(), Binder.getCallingUid(), userId, true, callerFg, isBindExternal); if (res == null) { return 0; } if (res.record == null) { return -1; } ServiceRecord s = res.record; boolean permissionsReviewRequired = false; // 是否需要让用户预览所需权限，这一段没仔细看 // If permissions need a review before any of the app components can run, // we schedule binding to the service but do not start its process, then // we launch a review activity to which is passed a callback to invoke // when done to start the bound service's process to completing the binding. if (mAm.mPermissionReviewRequired) { if (mAm.getPackageManagerInternalLocked().isPermissionsReviewRequired( s.packageName, s.userId)) { permissionsReviewRequired = true; // Show a permission review UI only for binding from a foreground app if (!callerFg) { Slog.w(TAG, "u" + s.userId + " Binding to a service in package" + s.packageName + " requires a permissions review"); return 0; } final ServiceRecord serviceRecord = s; final Intent serviceIntent = service; RemoteCallback callback = new RemoteCallback( new RemoteCallback.OnResultListener() { @Override public void onResult(Bundle result) { synchronized(mAm) { final long identity = Binder.clearCallingIdentity(); try { if (!mPendingServices.contains(serviceRecord)) { return; } // If there is still a pending record, then the service // binding request is still valid, so hook them up. We // proceed only if the caller cleared the review requirement // otherwise we unbind because the user didn't approve. if (!mAm.getPackageManagerInternalLocked() .isPermissionsReviewRequired( serviceRecord.packageName, serviceRecord.userId)) { try { bringUpServiceLocked(serviceRecord, serviceIntent.getFlags(), callerFg, false, false); } catch (RemoteException e) { /* ignore - local call */ } } else { unbindServiceLocked(connection); } } finally { Binder.restoreCallingIdentity(identity); } } } }); final Intent intent = new Intent(Intent.ACTION_REVIEW_PERMISSIONS); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS); intent.putExtra(Intent.EXTRA_PACKAGE_NAME, s.packageName); intent.putExtra(Intent.EXTRA_REMOTE_CALLBACK, callback); if (DEBUG_PERMISSIONS_REVIEW) { Slog.i(TAG, "u" + s.userId + " Launching permission review for package " + s.packageName); } mAm.mHandler.post(new Runnable() { @Override public void run() { mAm.mContext.startActivityAsUser(intent, new UserHandle(userId)); } }); } } final long origId = Binder.clearCallingIdentity(); try { // 检查这个服务是不是在要重启的列表（还有个这个列表？）里，如果是就移除 if (unscheduleServiceRestartLocked(s, callerApp.info.uid, false)) { if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, "BIND SERVICE WHILE RESTART PENDING: " + s); } // 是否有自动创建标志 if ((flags&Context.BIND_AUTO_CREATE) != 0) { s.lastActivity = SystemClock.uptimeMillis(); // 如果已连接这个服务的连接都没有BIND_AUTO_CREATE标志 if (!s.hasAutoCreateConnections()) { // This is the first binding, let the tracker know. ServiceState stracker = s.getTracker(); if (stracker != null) { stracker.setBound(true, mAm.mProcessStats.getMemFactorLocked(), s.lastActivity); } } } // 和ActivityManagerService联系起来？ mAm.startAssociationLocked(callerApp.uid, callerApp.processName, callerApp.curProcState, s.appInfo.uid, s.name, s.processName); // Once the apps have become associated, if one of them is caller is ephemeral // the target app should now be able to see the calling app mAm.grantEphemeralAccessLocked(callerApp.userId, service, s.appInfo.uid, UserHandle.getAppId(callerApp.uid)); AppBindRecord b = s.retrieveAppBindingLocked(service, callerApp); ConnectionRecord c = new ConnectionRecord(b, activity, connection, flags, clientLabel, clientIntent); IBinder binder = connection.asBinder(); ArrayList<ConnectionRecord> clist = s.connections.get(binder); if (clist == null) { clist = new ArrayList<ConnectionRecord>(); s.connections.put(binder, clist); } clist.add(c); b.connections.add(c); if (activity != null) { if (activity.connections == null) { activity.connections = new HashSet<ConnectionRecord>(); } activity.connections.add(c); } b.client.connections.add(c); if ((c.flags&Context.BIND_ABOVE_CLIENT) != 0) { b.client.hasAboveClient = true; } if ((c.flags&Context.BIND_ALLOW_WHITELIST_MANAGEMENT) != 0) { s.whitelistManager = true; } if (s.app != null) { updateServiceClientActivitiesLocked(s.app, c, true); } clist = mServiceConnections.get(binder); if (clist == null) { clist = new ArrayList<ConnectionRecord>(); mServiceConnections.put(binder, clist); } clist.add(c); // bringUpServiceLocked这里是启动service的地方，调用路径bringUpServiceLocked->realStartServiceLocked-> // app.thread.scheduleCreateService->ActivityThread.scheduleCreateService->ActivityThread.handleCreateService，如果启动成功则返回0 if ((flags&Context.BIND_AUTO_CREATE) != 0) { s.lastActivity = SystemClock.uptimeMillis(); if (bringUpServiceLocked(s, service.getFlags(), callerFg, false, permissionsReviewRequired) != null) { return 0; } } if (s.app != null) { if ((flags&Context.BIND_TREAT_LIKE_ACTIVITY) != 0) { s.app.treatLikeActivity = true; } if (s.whitelistManager) { s.app.whitelistManager = true; } // This could have made the service more important. mAm.updateLruProcessLocked(s.app, s.app.hasClientActivities || s.app.treatLikeActivity, b.client); mAm.updateOomAdjLocked(s.app, true); } if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, "Bind " + s + " with " + b + ": received=" + b.intent.received + " apps=" + b.intent.apps.size() + " doRebind=" + b.intent.doRebind); if (s.app != null && b.intent.received) { // 如果服务已经运行，则立刻发布connection // Service is already running, so we can immediately // publish the connection. try { c.conn.connected(s.name, b.intent.binder, false); } catch (Exception e) { Slog.w(TAG, "Failure sending service " + s.shortName + " to connection " + c.conn.asBinder() + " (in " + c.binding.client.processName + ")", e); } // If this is the first app connected back to this binding, // and the service had previously asked to be told when // rebound, then do so. if (b.intent.apps.size() == 1 && b.intent.doRebind) { requestServiceBindingLocked(s, b.intent, callerFg, true); } } else if (!b.intent.requested) { requestServiceBindingLocked(s, b.intent, callerFg, false); } getServiceMapLocked(s.userId).ensureNotStartingBackgroundLocked(s); } finally { Binder.restoreCallingIdentity(origId); } return 1; } |