以编程方式安装Android M Light and Dark状态栏 - 如何让它再次变黑？

Question

在Android M中,我们可以使状态栏图标变暗.为此,我们可以在主题的xml中指定属性:

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

或者我们使用以下代码在运行时设置它:

View someView = findViewById(R.id.some_view);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
    someView.setSystemUiVisibility(someView.getSystemUiVisibility() | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
}

它实际上工作正常.但问题是如何在运行时将状态栏模式正确设置为黑暗？

我已经尝试过那些变种:

// Makes status bar mode dark, but also hides it along with all navigation views. 
someView.setSystemUiVisibility(someView.getSystemUiVisibility() | ~View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);

// Does nothing 
someView.setSystemUiVisibility(someView.getSystemUiVisibility() & ~View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);

// Also does nothing 
someView.setSystemUiVisibility(someView.getSystemUiVisibility() ^ View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);

那么如何才能以正确的方式完成？

Answer 1

@Aracem发布的解决方案有效,但如果您尝试更改状态栏的背景颜色,则无效.就我而言,我是按照以下方式进行的.

要启用windowLightStatusBar(以编程方式,在Utils类中),例如:

 public static void setLightStatusBar(View view,Activity activity){


            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

                int flags = view.getSystemUiVisibility();
                flags |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
                view.setSystemUiVisibility(flags);
                activity.getWindow().setStatusBarColor(Color.WHITE); 
            }
}

要将StatusBar恢复到以前的状态:

  public static void clearLightStatusBar(Activity activity) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            Window window = activity.getWindow();
            window.setStatusBarColor(ContextCompat
                 .getColor(activity,R.color.colorPrimaryDark)); 
        }
    }

恢复状态栏的颜色就足够了,它还可以恢复图标颜色.非常重要:直到setLightStatusBar(View view ..)中使用的视图从屏幕消失(即view.getVisibility()== GONE | INVISIBLE),才会发生恢复操作.

Answer 2

根据Nick Butcher的项目"Plaid"

public static void clearLightStatusBar(@NonNull View view) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        int flags = view.getSystemUiVisibility();
        flags &= ~View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
        view.setSystemUiVisibility(flags);
    }
}

你可以在这里找到项目

Answer 3

我基于@Aracem和@CarlosHernándezGil,但我认为如果我们使用按位XOR(Java中的^运算符)将很容易理解

private void setLightStatusBar(Activity activity) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        int flags = activity.getWindow().getDecorView().getSystemUiVisibility(); // get current flag
        flags |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;   // add LIGHT_STATUS_BAR to flag
        activity.getWindow().getDecorView().setSystemUiVisibility(flags); 
        activity.getWindow().setStatusBarColor(Color.GRAY); // optional
    }
}

private void clearLightStatusBar(Activity activity) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        int flags = activity.getWindow().getDecorView().getSystemUiVisibility(); // get current flag
        flags = flags ^ View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; // use XOR here for remove LIGHT_STATUS_BAR from flags
        activity.getWindow().getDecorView().setSystemUiVisibility(flags);
        activity.getWindow().setStatusBarColor(Color.GREEN); // optional
    }
}

说明

首先,看看SYSTEM_UI_FLAG_LIGHT_STATUS_BAR和setSystemUiVisibility

/**
 * Flag for {@link #setSystemUiVisibility(int)}: Requests the status bar to draw in a mode that
 * is compatible with light status bar backgrounds.
 */
public static final int SYSTEM_UI_FLAG_LIGHT_STATUS_BAR = 0x00002000;

public void setSystemUiVisibility(int visibility) {
    if (visibility != mSystemUiVisibility) {
        mSystemUiVisibility = visibility;
        ...
    }
}

我认为下面的2行代码很难理解

flags |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; // for set light status bar
flags = flags ^ View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; // for clear light status bar

乍一看,我认为我们可以使用简单的

flags = View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; // for set light status bar
flags = 0; // for clear light status bar (0 <=> LIGHT_STATUS_BAR <=> default systemUiVisibility)

但是我们应该使用|并且^因为
示例,我们要将状态栏和导航栏都设置为亮,然后我们将使用

flags = View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR | View.View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
activity.getWindow().getDecorView().setSystemUiVisibility(flags);

当我们不希望状态栏再亮时,我们可以使用

flags = View.View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
activity.getWindow().getDecorView().setSystemUiVisibility(flags);

要么

flags = activity.getWindow().getDecorView().getSystemUiVisibility();
flags = flags ^ View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; 
activity.getWindow().getDecorView().setSystemUiVisibility(flags);

要知道更多我们为什么使用|和^,我认为下面的教程可以帮助 https://medium.com/@JakobUlbrich/flag-attributes-in-android-how-to-use-them-ac4ec8aee7d1 这是我的理解.希望这有帮助

Answer 4

systemUiVisibility- 现已弃用。你可以用WindowInsetsControllerCompat它代替。

private val insetsController: WindowInsetsControllerCompat? by lazy {
    activity?.window?.let { window -> WindowInsetsControllerCompat(window, window.decorView) }
}

private fun setLightStatusBar(light: Boolean) {
    insetsController?.isAppearanceLightStatusBars = light
}

UPD：上面的构造函数WindowInsetsControllerCompat已被弃用，因此请使用以下实例化：

private val insetsController: WindowInsetsControllerCompat? by lazy {
    activity?.window?.decorView?.let(ViewCompat::getWindowInsetsController)
}

Answer 5

我为 API 23-30 切换浅色和深色的方式与这些略有不同。这是 kotlin 版本

由于我使用 Compose 和 Crossfade 动画来更改主题，因此在某些情况下会调用此函数两次，从而自行xor撤消。另一种方法是逆or运算。我的浅色主题切换器最终看起来像这样

@Suppress("DEPRECATION")
fun invertInsets(darkTheme: Boolean, window: Window) {
    if (Build.VERSION.SDK_INT >= 30) {
        //Correct way of doing things
        val statusBar = APPEARANCE_LIGHT_STATUS_BARS
        val navBar = APPEARANCE_LIGHT_NAVIGATION_BARS
        if (!darkTheme) {
            window.insetsController?.setSystemBarsAppearance(statusBar, statusBar)
            window.insetsController?.setSystemBarsAppearance(navBar, navBar)
        } else {
            window.insetsController?.setSystemBarsAppearance(0, statusBar)
            window.insetsController?.setSystemBarsAppearance(0, navBar)
        }
    } else {
        // Does bitwise operations (or to add, inverse or to remove)
        // This is depreciated but the new version is API 30+ so I should have this here
        val flags = View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR or
            if (Build.VERSION.SDK_INT >= 26) View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR else 0

        if (!darkTheme) {
            window.decorView.systemUiVisibility = 
                window.decorView.systemUiVisibility or flags
        } else {
            window.decorView.systemUiVisibility = 
                (window.decorView.systemUiVisibility.inv() or flags).inv()
        }
    }
}

API 30+ 的位不会折旧，但实际上没有多少手机达到 API 30，因此还有较低 API 的位

为了简洁起见，它只是预先计算标志（因为设置LIGHT_NAVIGATION_BARS是 API 26+），然后明确设置或重置这些确切的标志。没有and或xor有趣的生意。or将始终将标志设置为1，而逆或事物将始终将标志设置为0。然而，这是可能的，因为 和SYSTEM_UI_FLAG_LIGHT_STATUS_BAR都是SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR一位。否则可能需要使用xor.

Answer 6

我将这个简单的实用程序对象放在一起，它允许您在任何片段内更改状态栏颜色和点亮/关闭状态栏。但是，这依赖于使用 Android Jetpack Navigation 组件进行导航 (Kotlin)：

object StatusBarUtil {
    fun changeStatusBarColor(activity: Activity, @ColorInt color: Int, lightStatusBar: Boolean) {
        activity.window?.let { win ->
            val nav = Navigation.findNavController(activity, R.id.your_nav_host_fragmen /* TODO: Use the ID of your nav host fragment */)
            val currentDest = nav.currentDestination?.id
            val oldColor = win.statusBarColor
            val oldFlags = win.decorView.systemUiVisibility
            win.statusBarColor = color

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                var flags = oldFlags
                flags = if (lightStatusBar) {
                    flags or View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
                } else {
                    flags and View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR.inv()
                }
                win.decorView.systemUiVisibility = flags
            }

            nav.addOnNavigatedListener { _, dest ->
                if (dest.id != currentDest) {
                    win.statusBarColor = oldColor
                    win.decorView.systemUiVisibility = oldFlags
                }
            }
        }
    }
}

要使用它，请从任何片段的 中调用以下内容onViewCreated：

StatusBarUtil.changeStatusBarColor(requireActivity(), someDarkColor, false)

Answer 7

SDK 的 API 30 略有变化，现在灯状态栏外观由WindowInsetsController控制，可以从Window 获取。下面是 Kotlin 中的示例方法（在 Activity 中），将新 API 与以前用于旧 Android SDK 版本的View.setSystemUiVisibility相结合。请记住，这只会更改状态栏的系统图标外观，状态栏的实际颜色仍然可以由Window.setStatusBarColor设置。

@Suppress("DEPRECATION")
private fun setSystemUiLightStatusBar(isLightStatusBar: Boolean) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
            val systemUiAppearance = if (isLightStatusBar) {
                WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS
            } else {
                0
            }
            window.insetsController?.setSystemBarsAppearance(systemUiAppearance,
                                                             WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS)
        } else {
            val systemUiVisibilityFlags = if (isLightStatusBar) {
                window.decorView.systemUiVisibility or SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
            } else {
                window.decorView.systemUiVisibility and SYSTEM_UI_FLAG_LIGHT_STATUS_BAR.inv()
            }
            window.decorView.systemUiVisibility = systemUiVisibilityFlags
        }
    }
}