当前位置：首页 > news >正文

Android 13 大屏显示时关于SystemUI和Launcher3问题

news 来源：原创 2024/9/17 4:32:38

当系统运行在大屏上时,原来显示SystemUI导航栏的位置会变成Launcher3的任务栏,然后导航栏的3个按键显示靠右下角显示
我的博客
1.先看SystemUI的导航栏为什么会消失,移动


/SystemUI/src/com/android/systemui/statusbar/NavigationBarController.javapublic void createNavigationBars(final boolean includeDefaultDisplay,RegisterStatusBarResult result) {//更新辅助功能按钮模式updateAccessibilityButtonModeIfNeeded();// 判断是否初始化TaskBar，不需要TaskBar就默认显示上创建导航栏final boolean shouldCreateDefaultNavbar = includeDefaultDisplay&& !initializeTaskbarIfNecessary();Display[] displays = mDisplayManager.getDisplays();for (Display display : displays) {if (shouldCreateDefaultNavbar || display.getDisplayId() != DEFAULT_DISPLAY) {createNavigationBar(display, null /* savedState */, result);}}}/** @return {@code true} if taskbar is enabled, false otherwise */private boolean initializeTaskbarIfNecessary() {//判断是否是平板if (mIsTablet) {// Remove navigation bar when taskbar is showing//移除导航栏的时候任务栏显示Trace.beginSection("NavigationBarController#initializeTaskbarIfNecessary");removeNavigationBar(mContext.getDisplayId());mTaskbarDelegate.init(mContext.getDisplayId());Trace.endSection();} else {mTaskbarDelegate.destroy();}return mIsTablet;}...{mIsTablet = isTablet(mContext);//如果判断它是平板}/SystemUI/shared/src/com/android/systemui/shared/recents/utilities/Utilities.java/** @return whether or not {@param context} represents that of a large screen device or not */@TargetApi(Build.VERSION_CODES.R)//如果屏幕的（最小边长度*160/dpi值）< 600，就会判断为设备是平板设备public static boolean isTablet(Context context) {final WindowManager windowManager = context.getSystemService(WindowManager.class);final Rect bounds = windowManager.getCurrentWindowMetrics().getBounds();float smallestWidth = dpiFromPx(Math.min(bounds.width(), bounds.height()),context.getResources().getConfiguration().densityDpi);//add textreturn false;//smallestWidth >= TABLET_MIN_DPS; 如果想要显示导航栏,直接返回false//add text}//判断屏幕dpipublic static float dpiFromPx(float size, int densityDpi) {float densityRatio = (float) densityDpi / DisplayMetrics.DENSITY_DEFAULT;return (size / densityRatio);}

2.找到Launcher3显示任务栏的部分,也做类似的修改不让任务栏显示

/packages/apps/Launcher3/quickstep/src/com/android/launcher3/taskbar/TaskbarManager.javaprivate void recreateTaskbar() {destroyExistingTaskbar();DeviceProfile dp = mUserUnlocked ? LauncherAppState.getIDP(mContext).getDeviceProfile(mContext) : null;//add text    boolean isTaskBarEnabled = false;//dp != null && dp.isTaskbarPresent;//add text  if (!isTaskBarEnabled) {SystemUiProxy.INSTANCE.get(mContext).notifyTaskbarStatus(/* visible */ false, /* stashed */ false);return;}...    
}/Launcher3/src/com/android/launcher3/states/RotationHelper.javapublic static boolean getAllowRotationDefaultValue(DeviceProfile deviceProfile) {// If the device's pixel density was scaled (usually via settings for A11y), use the// original dimensions to determine if rotation is allowed of not.float originalSmallestWidth = dpiFromPx(Math.min(deviceProfile.widthPx, deviceProfile.heightPx), DENSITY_DEVICE_STABLE);//add text        return  false;//originalSmallestWidth >= MIN_TABLET_WIDTH;//add text }/Launcher3/src/com/android/launcher3/util/DisplayController.java/*** Returns {@code true} if the bounds represent a tablet.*/public boolean isTablet(WindowBounds bounds) {//add textreturn false;//smallestSizeDp(bounds) >= MIN_TABLET_WIDTH;//add text}/Launcher3/src/com/android/launcher3/util/window/WindowManagerProxy.javapublic class WindowManagerProxy implements ResourceBasedOverride {Resources systemRes = context.getResources();Configuration config = systemRes.getConfiguration();-        boolean isTablet = config.smallestScreenWidthDp > MIN_TABLET_WIDTH;
+        boolean isTablet = false;//config.smallestScreenWidthDp > MIN_TABLET_WIDTH;boolean isGesture = isGestureNav(context);boolean isPortrait = config.screenHeightDp > config.screenWidthDp;-        boolean isTablet = swDp >= MIN_TABLET_WIDTH;
+        boolean isTablet = false;//swDp >= MIN_TABLET_WIDTH;boolean isTabletOrGesture = isTablet|| (Utilities.ATLEAST_R && isGestureNav(context));

Android 13 平板Taskbar加载流程