获取状态栏高度

public static int getStatusBarHeight(Context context) {    int result = 0;    int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");    if (resourceId > 0) {        result = context.getResources().getDimensionPixelSize(resourceId);    }    return result;}

或者

getWindow().getDecorView().setOnApplyWindowInsetsListener((v, insets) -> {    int statuBarHeight = insets.getStableInsetTop();    return insets;});

获取导航栏高度

public static int getNavigationBarHeight(Context context) {    int result = 0;    int resourceId = context.getResources().getIdentifier("navigation_bar_height", "dimen", "android");    if (resourceId > 0) {        result = context.getResources().getDimensionPixelSize(resourceId);    }    return result;}

或者

getWindow().getDecorView().setOnApplyWindowInsetsListener((v, insets) -> {    int navigationBarHeight = insets.getStableInsetBottom();    return insets;});

其他数据

系统的各种数据定义位于SDK的xml文件中：

android-30/data/res/values/dimens.xml

<dimen name="toast_y_offset">24dpdimen><dimen name="status_bar_height">@dimen/status_bar_height_portraitdimen><dimen name="status_bar_height_portrait">24dpdimen><dimen name="status_bar_height_landscape">@dimen/status_bar_height_portraitdimen><dimen name="navigation_bar_height">48dpdimen><dimen name="navigation_bar_height_landscape">48dpdimen><dimen name="navigation_bar_width">48dpdimen>

通过key可以获取对应的值。

修改导航栏、状态栏背景色

getWindow().setStatusBarColor(Color.RED);getWindow().setNavigationBarColor(Color.RED);

源码

导航栏和状态栏源码相似

#PhoneWindow@Overridepublic void setStatusBarColor(int color) {    mStatusBarColor = color;    mForcedStatusBarColor = true;    if (mDecor != null) {        mDecor.updateColorViews(null, false );    }}

#DecorViewpublic static final ColorViewAttributes STATUS_BAR_COLOR_VIEW_ATTRIBUTES =        new ColorViewAttributes(SYSTEM_UI_FLAG_FULLSCREEN, FLAG_TRANSLUCENT_STATUS,                Gravity.TOP, Gravity.LEFT, Gravity.RIGHT,                Window.STATUS_BAR_BACKGROUND_TRANSITION_NAME,                com.android.internal.R.id.statusBarBackground,                FLAG_FULLSCREEN, ITYPE_STATUS_BAR);public static final ColorViewAttributes NAVIGATION_BAR_COLOR_VIEW_ATTRIBUTES =        new ColorViewAttributes(                SYSTEM_UI_FLAG_HIDE_NAVIGATION, FLAG_TRANSLUCENT_NAVIGATION,                Gravity.BOTTOM, Gravity.RIGHT, Gravity.LEFT,                Window.NAVIGATION_BAR_BACKGROUND_TRANSITION_NAME,                com.android.internal.R.id.navigationBarBackground,                0 , ITYPE_NAVIGATION_BAR);private final ColorViewState mStatusColorViewState = new ColorViewState(STATUS_BAR_COLOR_VIEW_ATTRIBUTES);private final ColorViewState mNavigationColorViewState = new ColorViewState(NAVIGATION_BAR_COLOR_VIEW_ATTRIBUTES);

WindowInsets updateColorViews(WindowInsets insets, boolean animate) {...    updateColorViewInt(mNavigationColorViewState, sysUiVisibility,             calculateNavigationBarColor(), mWindow.mNavigationBarDividerColor, navBarSize,             navBarToRightEdge || navBarToLeftEdge, navBarToLeftEdge,             0 , animate && !disallowAnimate,             mForceWindowDrawsBarBackgrounds, controller);...    updateColorViewInt(mStatusColorViewState, sysUiVisibility,              calculateStatusBarColor(), 0, mLastTopInset,              false , statusBarNeedsLeftInset, statusBarSideInset,              animate && !disallowAnimate,              mForceWindowDrawsBarBackgrounds, controller);}

调用updateColorViews更新背景色的方法，还有如下位置：

#ViewRootImplprivate void performTraversals() {dispatchApplyInsets(host);}public void dispatchApplyInsets(View host) {     mApplyInsetsRequested = false;     WindowInsets insets = getWindowInsets(true );     host.dispatchApplyWindowInsets(insets);...}#Viewpublic WindowInsets dispatchApplyWindowInsets(WindowInsets insets) {    ...    return onApplyWindowInsets(insets);...}#DecorView@Overridepublic WindowInsets onApplyWindowInsets(WindowInsets insets) {    ...    insets = updateColorViews(insets, true);    ...    return insets;}

关于WindowInsets

WindowInsets可以翻译为窗口附加物，一般是指一个界面中，不由开发者直接控制的部分，例如：状态栏、底部的导航栏等等。具体的类型在Type中有定义：

#WindowInsets.Typestatic final int FIRST = 1 << 0;static final int STATUS_BARS = FIRST;static final int NAVIGATION_BARS = 1 << 1;static final int CAPTION_BAR = 1 << 2;static final int IME = 1 << 3;static final int SYSTEM_GESTURES = 1 << 4;static final int MANDATORY_SYSTEM_GESTURES = 1 << 5;static final int TAPPABLE_ELEMENT = 1 << 6;static final int DISPLAY_CUTOUT = 1 << 7;static final int LAST = 1 << 8;static final int SIZE = 9;static final int WINDOW_DECOR = LAST;

可以向DecorView添加监听，处理WindowInsets

getWindow().getDecorView().setOnApplyWindowInsetsListener((v, insets) -> {    return insets;});

所以，可以在这里获取导航栏和状态栏的高度：

getWindow().getDecorView().setOnApplyWindowInsetsListener((v, insets) -> {    int statuBarHeight = insets.getStableInsetTop();    int navigationBarHeight = insets.getStableInsetBottom();    return insets;});

也可以修改导航栏和状态栏的高度（好像没有应用场景）：

getWindow().getDecorView().setOnApplyWindowInsetsListener((v, insets) -> {    int statuBarHeight = 0;    int navigationBarHeight = 0;    return insets.replaceSystemWindowInsets(0,statuBarHeight,0,navigationBarHeight);;});

来源地址：https://blog.csdn.net/qq_23049111/article/details/126948312