Android 11 SystemUI(状态/导航栏)-图标按键的深浅色

概述

       自 Android 5.0 版本，Android 带来了沉浸式系统 bar（状态栏和导航栏），Android 的视觉效果进一步提高，各大 app 厂商也在大多数场景上使用沉浸式效果。6.0开始提供了View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR标志位，将状态栏设置为浅色模式, 清除掉这个标志, 可以恢复为深色模式.

引自:Android M如何设置状态栏图标黑白色

App调用方法

主题设置加入, 暗灰图标

<item name="android:windowLightStatusBar">true</item>

代码中实现切换

public static void changeStatusBarContrastStyle(Window window, Boolean lightIcons) {
    
    
     View decorView = window.getDecorView();
     if (lightIcons) {
    
    
         // Draw light icons on a dark background color
         decorView.setSystemUiVisibility(decorView.getSystemUiVisibility() & ~View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
     } else {
    
    
         // Draw dark icons on a light background color
         decorView.setSystemUiVisibility(decorView.getSystemUiVisibility() | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
     }
 }

需要更高SDK支持:

//icon color -> black  
activity.getWindow().getDecorView().getWindowInsetsController().setSystemBarsAppearance(APPEARANCE_LIGHT_STATUS_BARS, APPEARANCE_LIGHT_STATUS_BARS);

//icon color -> white
activity.getWindow().getDecorView().getWindowInsetsController().setSystemBarsAppearance(0, APPEARANCE_LIGHT_STATUS_BARS);

色调变化流程

frameworks/base/core/java/android/view/View.java

    @Deprecated
    public void setSystemUiVisibility(int visibility) {
    
    
        if (visibility != mSystemUiVisibility) {
    
    
            mSystemUiVisibility = visibility;
            if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) {
    
    
                mParent.recomputeViewAttributes(this);
            }
        }
    }

frameworks/base/core/java/android/view/ViewRootImpl.java

    @Override
    public void recomputeViewAttributes(View child) {
    
    
        checkThread();
        if (mView == child) {
    
    
            mAttachInfo.mRecomputeGlobalAttributes = true;
            if (!mWillDrawSoon) {
    
    
                scheduleTraversals();
            }
        }
    }

frameworks/base/services/core/java/com/android/server/wm/DisplayPolicy.java

    int updateSystemUiVisibilityLw() {
    
    
		//...Ignore....
        mHandler.post(() -> {
    
    
            StatusBarManagerInternal statusBar = getStatusBarManagerInternal();
            if (statusBar != null) {
    
    
                final int displayId = getDisplayId();
                statusBar.setDisableFlags(displayId, visibility & StatusBarManager.DISABLE_MASK,
                        cause);
                if (transientState.first.length > 0) {
    
    
                    statusBar.showTransient(displayId, transientState.first);
                }
                if (transientState.second.length > 0) {
    
    
                    statusBar.abortTransient(displayId, transientState.second);
                }
                statusBar.onSystemBarAppearanceChanged(displayId, appearance,
                        appearanceRegions, isNavbarColorManagedByIme);
                statusBar.topAppWindowChanged(displayId, isFullscreen, isImmersive);

                // TODO(b/118118435): Remove this after removing system UI visibilities.
                synchronized (mLock) {
    
    
                    mDisplayContent.statusBarVisibilityChanged(
                            visibility & ~(View.STATUS_BAR_UNHIDE | View.NAVIGATION_BAR_UNHIDE));
                }
            }
        });
        return diff;
    }

SystemUI中的流程简单梳理下:

参考

Android statusbar icons color
[ANDROID] 狀態欄(STATUS BAR)文字與圖示轉換成灰色
Android 系统 Bar 沉浸式完美兼容方案
全屏、沉浸式、fitSystemWindow使用及原理分析：全方位控制“沉浸式”的实现