做程序网站需要什么代码吗,伦教九江网站建设,微信小程序代理,申请制作网站一、背景 在Android系统中#xff0c;SystemUI负责管理系统的状态栏、导航栏等用户界面元素。若要在SystemUI中默认去掉底部导航栏#xff0c;可以通过以下几种方法实现#xff1a; 1. 修改布局文件
在Android的SystemUI源代码中#xff0c;底部导航栏的布局文件通常…一、背景 在Android系统中SystemUI负责管理系统的状态栏、导航栏等用户界面元素。若要在SystemUI中默认去掉底部导航栏可以通过以下几种方法实现 1. 修改布局文件
在Android的SystemUI源代码中底部导航栏的布局文件通常位于com.android.systemui.statusbar.phone包中文件名可能为NavigationBarView.xml或其他与导航栏相关的布局文件。通过修改这些布局文件可以隐藏底部导航栏。具体步骤包括
使用Android Studio或其他IDE打开SystemUI项目。导入Android的SystemUI源代码。导航到与导航栏布局相关的文件。修改布局文件中的代码以隐藏底部导航栏例如通过设置visibility属性为GONE或INVISIBLE
frameworks\base\core\res\res\values\demins.xml 2. 编程方式隐藏
在SystemUI的Java代码中可以通过编程方式控制底部导航栏的显示与隐藏。这通常涉及到对NavigationBarController或类似控制器的操作。例如可以通过调用setSystemUiVisibility方法并传入适当的标志来隐藏导航栏如View.SYSTEM_UI_FLAG_HIDE_NAVIGATION。但请注意这种方法可能需要在应用层面而非系统层面实现因为直接修改SystemUI的代码通常需要对Android系统进行深度定制。
frameworks\base\services\core\java\com\android\server\wm\DisplayPolicy.java 3. 使用手势导航
主要核心代码:
framework/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java二、改变状态栏或者其他系统UI的可见性 setSystemUiVisibility(int visibility)通过setSystemUiVisibility(int visibility)方法可以改变状态栏或者其他系统UI的可见性。getWindow().getDecorView().setSystemUiVisibility(int visibility);
可供选择的参数
View.SYSTEM_UI_FLAG_VISIBLE默认模式显示状态栏和导航栏 View.SYSTEM_UI_FLAG_LOW_PROFILE低调模式隐藏不重要的状态栏图标导航栏中相应的图标都变成了一个小点。点击状态栏或导航栏还原成正常的状态 SYSTEM_UI_FLAG_HIDE_NAVIGATION隐藏导航栏点击屏幕任意区域导航栏将重新出现并且不会自动消失 SYSTEM_UI_FLAG_FULLSCREEN隐藏状态栏点击屏幕区域不会出现需要从状态栏位置下拉才会出现 SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION 三、三种方法去去掉底部导航栏
1、StatusBar中实现默认去掉底部导航栏
Overridepublic void start() {mGroupManager Dependency.get(NotificationGroupManager.class);mGroupAlertTransferHelper Dependency.get(NotificationGroupAlertTransferHelper.class);mVisualStabilityManager Dependency.get(VisualStabilityManager.class);mNotificationLogger Dependency.get(NotificationLogger.class);mRemoteInputManager Dependency.get(NotificationRemoteInputManager.class);mNotificationListener Dependency.get(NotificationListener.class);mNotificationListener.registerAsSystemService();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);mDataSaverController Dependency.get(DataSaverController.class);mAssistManager Dependency.get(AssistManager.class);mUiModeManager mContext.getSystemService(UiModeManager.class);mLockscreenUserManager Dependency.get(NotificationLockscreenUserManager.class);mGutsManager Dependency.get(NotificationGutsManager.class);mMediaManager Dependency.get(NotificationMediaManager.class);mEntryManager Dependency.get(NotificationEntryManager.class);mNotificationInterruptionStateProvider Dependency.get(NotificationInterruptionStateProvider.class);mViewHierarchyManager Dependency.get(NotificationViewHierarchyManager.class);mForegroundServiceController Dependency.get(ForegroundServiceController.class);mAppOpsController Dependency.get(AppOpsController.class);mZenController Dependency.get(ZenModeController.class);mKeyguardViewMediator getComponent(KeyguardViewMediator.class);mColorExtractor Dependency.get(SysuiColorExtractor.class);mDeviceProvisionedController Dependency.get(DeviceProvisionedController.class);mNavigationBarController Dependency.get(NavigationBarController.class);mBubbleController Dependency.get(BubbleController.class);mBubbleController.setExpandListener(mBubbleExpandListener);mActivityIntentHelper new ActivityIntentHelper(mContext);KeyguardSliceProvider sliceProvider KeyguardSliceProvider.getAttachedInstance();if (sliceProvider ! null) {sliceProvider.initDependencies(mMediaManager, mStatusBarStateController);} else {Log.w(TAG, Cannot init KeyguardSliceProvider dependencies);}mColorExtractor.addOnColorsChangedListener(this);mStatusBarStateController.addCallback(this,SysuiStatusBarStateController.RANK_STATUS_BAR);mWindowManager (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);mDreamManager IDreamManager.Stub.asInterface(ServiceManager.checkService(DreamService.DREAM_SERVICE));/* UNISOC: Bug 1074234, 885650, Super power feature { */if(SprdPowerManagerUtil.SUPPORT_SUPER_POWER_SAVE){int mode SprdPowerManagerUtil.getPowerSaveModeInternal();mPowerSaveMode mode;curMode mode;}/* } */mDisplay mWindowManager.getDefaultDisplay();mDisplayId mDisplay.getDisplayId();updateDisplaySize();mVibrateOnOpening mContext.getResources().getBoolean(R.bool.config_vibrateOnIconAnimation);mVibratorHelper Dependency.get(VibratorHelper.class);DateTimeView.setReceiverHandler(Dependency.get(Dependency.TIME_TICK_HANDLER));putComponent(StatusBar.class, this);// start old BaseStatusBar.start().mWindowManagerService WindowManagerGlobal.getWindowManagerService();mDevicePolicyManager (DevicePolicyManager) mContext.getSystemService(Context.DEVICE_POLICY_SERVICE);mAccessibilityManager (AccessibilityManager)mContext.getSystemService(Context.ACCESSIBILITY_SERVICE);mPowerManager (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);mKeyguardUpdateMonitor KeyguardUpdateMonitor.getInstance(mContext);mBarService IStatusBarService.Stub.asInterface(ServiceManager.getService(Context.STATUS_BAR_SERVICE));mRecents getComponent(Recents.class);mKeyguardManager (KeyguardManager) mContext.getSystemService(Context.KEYGUARD_SERVICE);// Connect in to the status bar manager servicemCommandQueue getComponent(CommandQueue.class);mCommandQueue.addCallback(this);RegisterStatusBarResult result null;try {result mBarService.registerStatusBar(mCommandQueue);} catch (RemoteException ex) {ex.rethrowFromSystemServer();}createAndAddWindows(result);// Make sure we always have the most current wallpaper info.IntentFilter wallpaperChangedFilter new IntentFilter(Intent.ACTION_WALLPAPER_CHANGED);mContext.registerReceiverAsUser(mWallpaperChangedReceiver, UserHandle.ALL,wallpaperChangedFilter, null /* broadcastPermission */, null /* scheduler */);mWallpaperChangedReceiver.onReceive(mContext, null);// Set up the initial notification state. This needs to happen before CommandQueue.disable()setUpPresenter();setSystemUiVisibility(mDisplayId, result.mSystemUiVisibility,result.mFullscreenStackSysUiVisibility, result.mDockedStackSysUiVisibility,0xffffffff, result.mFullscreenStackBounds, result.mDockedStackBounds,result.mNavbarColorManagedByIme);// StatusBarManagerService has a back up of IME token and its restored here.setImeWindowStatus(mDisplayId, result.mImeToken, result.mImeWindowVis,result.mImeBackDisposition, result.mShowImeSwitcher);// Set up the initial icon stateint numIcons result.mIcons.size();for (int i 0; i numIcons; i) {mCommandQueue.setIcon(result.mIcons.keyAt(i), result.mIcons.valueAt(i));}if (DEBUG) {Log.d(TAG, String.format(init: icons%d disabled0x%08x lights0x%08x imeButton0x%08x,numIcons,result.mDisabledFlags1,result.mSystemUiVisibility,result.mImeWindowVis));}IntentFilter internalFilter new IntentFilter();internalFilter.addAction(BANNER_ACTION_CANCEL);internalFilter.addAction(BANNER_ACTION_SETUP);mContext.registerReceiver(mBannerActionBroadcastReceiver, internalFilter, PERMISSION_SELF,null);IWallpaperManager wallpaperManager IWallpaperManager.Stub.asInterface(ServiceManager.getService(Context.WALLPAPER_SERVICE));try {wallpaperManager.setInAmbientMode(false /* ambientMode */, 0L /* duration */);} catch (RemoteException e) {// Just pass, nothing critical.}// end old BaseStatusBar.start().// Lastly, call to the icon policy to install/update all the icons.mIconPolicy new PhoneStatusBarPolicy(mContext, mIconController);mSignalPolicy new StatusBarSignalPolicy(mContext, mIconController);mUnlockMethodCache UnlockMethodCache.getInstance(mContext);mUnlockMethodCache.addListener(this);startKeyguard();mKeyguardUpdateMonitor.registerCallback(mUpdateCallback);putComponent(DozeHost.class, mDozeServiceHost);mScreenPinningRequest new ScreenPinningRequest(mContext);mFalsingManager FalsingManagerFactory.getInstance(mContext);Dependency.get(ActivityStarterDelegate.class).setActivityStarterImpl(this);Dependency.get(ConfigurationController.class).addCallback(this);// set the initial view visibilityDependency.get(InitController.class).addPostInitTask(this::updateAreThereNotifications);int disabledFlags1 result.mDisabledFlags1;int disabledFlags2 result.mDisabledFlags2;Dependency.get(InitController.class).addPostInitTask(() - setUpDisableFlags(disabledFlags1, disabledFlags2));// UNISOC: BUG 1156257 add screen resolution observer to control NavigationBarViewmContext.getContentResolver().registerContentObserver(Settings.System.getUriFor(ACTION_SR_CHANGING),false, mScreenResolutionObserver);CommonUtils.setRegionOrLongshotMode(mContext.getContentResolver(), 0);}// // Constructing the view// protected void makeStatusBarView(Nullable RegisterStatusBarResult result) {final Context context mContext;updateDisplaySize(); // populates mDisplayMetricsupdateResources();updateTheme();inflateStatusBarWindow(context);mStatusBarWindow.setService(this);mStatusBarWindow.setOnTouchListener(getStatusBarWindowTouchListener());// 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 mStatusBarWindow.findViewById(R.id.notification_panel);mStackScroller mStatusBarWindow.findViewById(R.id.notification_stack_scroller);mZenController.addCallback(this);NotificationListContainer notifListContainer (NotificationListContainer) mStackScroller;mNotificationLogger.setUpWithContainer(notifListContainer);mNotificationIconAreaController SystemUIFactory.getInstance().createNotificationIconAreaController(context, this, mStatusBarStateController);inflateShelf();mNotificationIconAreaController.setupShelf(mNotificationShelf);Dependency.get(DarkIconDispatcher.class).addDarkReceiver(mNotificationIconAreaController);// Allow plugins to reference DarkIconDispatcher and StatusBarStateControllerDependency.get(PluginDependencyProvider.class).allowPluginDependency(DarkIconDispatcher.class);Dependency.get(PluginDependencyProvider.class).allowPluginDependency(StatusBarStateController.class);FragmentHostManager.get(mStatusBarWindow).addTagListener(CollapsedStatusBarFragment.TAG, (tag, fragment) - {CollapsedStatusBarFragment statusBarFragment (CollapsedStatusBarFragment) fragment;statusBarFragment.initNotificationIconArea(mNotificationIconAreaController);PhoneStatusBarView oldStatusBarView mStatusBarView;mStatusBarView (PhoneStatusBarView) fragment.getView();mStatusBarView.setBar(this);mStatusBarView.setPanel(mNotificationPanel);mStatusBarView.setScrimController(mScrimController);// CollapsedStatusBarFragment re-inflated PhoneStatusBarView and both of// mStatusBarView.mExpanded and mStatusBarView.mBouncerShowing are false.// PhoneStatusBarViews new instance will set to be gone in// PanelBar.updateVisibility after calling mStatusBarView.setBouncerShowing// that will trigger PanelBar.updateVisibility. If there is a heads up showing,// it needs to notify PhoneStatusBarViews new instance to update the correct// status by calling mNotificationPanel.notifyBarPanelExpansionChanged().if (mHeadsUpManager.hasPinnedHeadsUp()) {mNotificationPanel.notifyBarPanelExpansionChanged();}mStatusBarView.setBouncerShowing(mBouncerShowing);if (oldStatusBarView ! null) {float fraction oldStatusBarView.getExpansionFraction();boolean expanded oldStatusBarView.isExpanded();mStatusBarView.panelExpansionChanged(fraction, expanded);}HeadsUpAppearanceController oldController mHeadsUpAppearanceController;if (mHeadsUpAppearanceController ! null) {// This view is being recreated, lets destroy the old onemHeadsUpAppearanceController.destroy();}mHeadsUpAppearanceController new HeadsUpAppearanceController(mNotificationIconAreaController, mHeadsUpManager, mStatusBarWindow);mHeadsUpAppearanceController.readFrom(oldController);mStatusBarWindow.setStatusBarView(mStatusBarView);updateAreThereNotifications();checkBarModes();}).getFragmentManager().beginTransaction().replace(R.id.status_bar_container, new CollapsedStatusBarFragment(),CollapsedStatusBarFragment.TAG).commit();mIconController Dependency.get(StatusBarIconController.class);mHeadsUpManager new HeadsUpManagerPhone(context, mStatusBarWindow, mGroupManager, this,mVisualStabilityManager);Dependency.get(ConfigurationController.class).addCallback(mHeadsUpManager);mHeadsUpManager.addListener(this);mHeadsUpManager.addListener(mNotificationPanel);mHeadsUpManager.addListener(mGroupManager);mHeadsUpManager.addListener(mGroupAlertTransferHelper);mHeadsUpManager.addListener(mVisualStabilityManager);mAmbientPulseManager.addListener(this);mAmbientPulseManager.addListener(mGroupManager);mAmbientPulseManager.addListener(mGroupAlertTransferHelper);mNotificationPanel.setHeadsUpManager(mHeadsUpManager);mGroupManager.setHeadsUpManager(mHeadsUpManager);mGroupAlertTransferHelper.setHeadsUpManager(mHeadsUpManager);mNotificationLogger.setHeadsUpManager(mHeadsUpManager);putComponent(HeadsUpManager.class, mHeadsUpManager);createNavigationBar(result);if (ENABLE_LOCKSCREEN_WALLPAPER) {mLockscreenWallpaper new LockscreenWallpaper(mContext, this, mHandler);}mKeyguardIndicationController SystemUIFactory.getInstance().createKeyguardIndicationController(mContext,mStatusBarWindow.findViewById(R.id.keyguard_indication_area),mStatusBarWindow.findViewById(R.id.lock_icon));mNotificationPanel.setKeyguardIndicationController(mKeyguardIndicationController);mAmbientIndicationContainer mStatusBarWindow.findViewById(R.id.ambient_indication_container);// TODO: Find better place for this callback.mBatteryController.addCallback(new BatteryStateChangeCallback() {Overridepublic void onPowerSaveChanged(boolean isPowerSave) {mHandler.post(mCheckBarModes);if (mDozeServiceHost ! null) {mDozeServiceHost.firePowerSaveChanged(isPowerSave);}}Overridepublic void onBatteryLevelChanged(int level, boolean pluggedIn, boolean charging) {// noop}});mAutoHideController Dependency.get(AutoHideController.class);mAutoHideController.setStatusBar(this);mLightBarController Dependency.get(LightBarController.class);ScrimView scrimBehind mStatusBarWindow.findViewById(R.id.scrim_behind);ScrimView scrimInFront mStatusBarWindow.findViewById(R.id.scrim_in_front);mScrimController SystemUIFactory.getInstance().createScrimController(scrimBehind, scrimInFront, mLockscreenWallpaper,(state, alpha, color) - mLightBarController.setScrimState(state, alpha, color),scrimsVisible - {if (mStatusBarWindowController ! null) {mStatusBarWindowController.setScrimsVisibility(scrimsVisible);}if (mStatusBarWindow ! null) {mStatusBarWindow.onScrimVisibilityChanged(scrimsVisible);}}, DozeParameters.getInstance(mContext),mContext.getSystemService(AlarmManager.class));mNotificationPanel.initDependencies(this, mGroupManager, mNotificationShelf,mHeadsUpManager, mNotificationIconAreaController, mScrimController);mDozeScrimController new DozeScrimController(DozeParameters.getInstance(context));BackDropView backdrop mStatusBarWindow.findViewById(R.id.backdrop);mMediaManager.setup(backdrop, backdrop.findViewById(R.id.backdrop_front),backdrop.findViewById(R.id.backdrop_back), mScrimController, mLockscreenWallpaper);// Other iconsmVolumeComponent getComponent(VolumeComponent.class);mNotificationPanel.setUserSetupComplete(mUserSetup);if (UserManager.get(mContext).isUserSwitcherEnabled()) {createUserSwitcher();}mNotificationPanel.setLaunchAffordanceListener(mStatusBarWindow::onShowingLaunchAffordanceChanged);// Set up the quick settings tile panelView 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).withDefault(this::createDefaultQSFragment).build());mBrightnessMirrorController new BrightnessMirrorController(mStatusBarWindow,(visible) - {mBrightnessMirrorVisible visible;updateScrimController();});fragmentHostManager.addTagListener(QS.TAG, (tag, f) - {QS qs (QS) f;if (qs instanceof QSFragment) {mQSPanel ((QSFragment) qs).getQsPanel();mQSPanel.setBrightnessMirror(mBrightnessMirrorController);mFooter ((QSFragment) qs).getFooter();}});}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 broadcastsIntentFilter filter new IntentFilter();filter.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);filter.addAction(Intent.ACTION_SCREEN_OFF);filter.addAction(DevicePolicyManager.ACTION_SHOW_DEVICE_MONITORING_DIALOG);/* UNISOC: Bug 1074234, 885650, Super power feature { */if(SprdPowerManagerUtil.SUPPORT_SUPER_POWER_SAVE){filter.addAction(SprdPowerManagerUtil.ACTION_POWEREX_SAVE_MODE_CHANGED);}/* } */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 windowsThreadedRenderer.overrideProperty(disableProfileBars, true);// Private API call to make the shadows look better for RecentsThreadedRenderer.overrideProperty(ambientRatio, String.valueOf(1.5f));/* UNISOC: Bug 1074234, 885650, Super power feature { */if(SprdPowerManagerUtil.SUPPORT_SUPER_POWER_SAVE mNotificationPanel ! null){int mode SprdPowerManagerUtil.getPowerSaveModeInternal();if(mFooter ! null){mFooter.setPowerSaveMode(mode);}if(mQSPanel ! null){mQSPanel.setPowerSaveMode(mode);}if (mNotificationPanel ! null){mNotificationPanel.setPowerSaveMode(mode);}/* UNISOC: Modify for bug974161 { */mNavigationBarController.setPowerSaveMode(mode);/* } */}/* } *//* UNISOC: Bug 1104465 add for screen pinning { */mScreenPinningNotify new ScreenPinningNotify(mContext);/* } */}在makeStatusBarView(Nullable RegisterStatusBarResult result)中的 createNavigationBar(result); 就是加载导航栏 直接注释掉就可以了2、在DisplayPolicy.java中去掉底部导航栏 public boolean hasNavigationBar() {return mHasNavigationBar;}/*** Return the display height available after excluding any screen* decorations that could never be removed in Honeycomb. That is, system bar or* button bar.*/public int getNonDecorDisplayHeight(int fullWidth, int fullHeight, int rotation, int uiMode,DisplayCutout displayCutout) {int height fullHeight;if (hasNavigationBar()) {final int navBarPosition navigationBarPosition(fullWidth, fullHeight, rotation);if (navBarPosition NAV_BAR_BOTTOM) {height - getNavigationBarHeight(rotation, uiMode);}}if (displayCutout ! null) {height - displayCutout.getSafeInsetTop() displayCutout.getSafeInsetBottom();}return height;}/*** Return the display width available after excluding any screen* decorations that could never be removed in Honeycomb. That is, system bar or* button bar.*/public int getNonDecorDisplayWidth(int fullWidth, int fullHeight, int rotation, int uiMode,DisplayCutout displayCutout) {int width fullWidth;if (hasNavigationBar()) {final int navBarPosition navigationBarPosition(fullWidth, fullHeight, rotation);if (navBarPosition NAV_BAR_LEFT || navBarPosition NAV_BAR_RIGHT) {width - getNavigationBarWidth(rotation, uiMode);}}if (displayCutout ! null) {width - displayCutout.getSafeInsetLeft() displayCutout.getSafeInsetRight();}return width;}根据hasNavigationBar()判断是否有导航栏来就是显示屏幕宽度和高度所以修改为:public boolean hasNavigationBar() {- return mHasNavigationBar; return false;}3、默认隐藏导航栏
设置导航栏高度为0
路径:frameworks\base\core\res\res\values\demins.xml
dimen namenavigation_bar_height48dp/dimen
navigation_bar_height 导航栏高度设置为0参考
