如何才能持久更改 Android 屏幕亮度？

发布于 2024-11-11 07:02:12 字数 437 浏览 5 评论 0原文

我已经设法使用以下代码更改活动（以及扩展整个应用程序）中的屏幕亮度：

Settings.System.putFloat(this.getContentResolver(),Settings.System.SCREEN_BRIGHTNESS, ((float)LocationService.settings.screenBrightness));

WindowManager.LayoutParams lp = getWindow().getAttributes();
float brightness = someValue;
lp.screenBrightness = brightness;
getWindow().setAttributes(lp);

但是，一旦我关闭应用程序，亮度就会恢复到之前的设置。是否有办法使这些更改在应用程序的生命周期之外持续存在？

谢谢！

原文

I've managed to change screen brightness within an activity (and by extension the entire app) using the following code:

Settings.System.putFloat(this.getContentResolver(),Settings.System.SCREEN_BRIGHTNESS, ((float)LocationService.settings.screenBrightness));

WindowManager.LayoutParams lp = getWindow().getAttributes();
float brightness = someValue;
lp.screenBrightness = brightness;
getWindow().setAttributes(lp);

However, as soon as I close the app the brightness returns to its previous settings. Is there anyway to make these changes persist outside of the lifecycle of the app?

Thanks!

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命硬 2024-11-18 07:02:12

这里也许对你有帮助：

WindowManager.LayoutParams layoutParams = getWindow().getAttributes();  
layoutParams.buttonBrightness = value;
getWindow().setAttributes(layoutParams);

Here maybe help you:

WindowManager.LayoutParams layoutParams = getWindow().getAttributes();  
layoutParams.buttonBrightness = value;
getWindow().setAttributes(layoutParams);

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丘比特射中我 2024-11-18 07:02:12

尝试一下

Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE, Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);

int brightnessLevel = 255;
Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, brightnessLevel);

您将需要在 AndroidManifest.xml

http://android-er.blogspot.com/2011/02/change-system-screen-brightness-using.html

Try this

Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE, Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);

int brightnessLevel = 255;
Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, brightnessLevel);

You will need the WRITE_SETTINGS permission set in your AndroidManifest.xml

http://android-er.blogspot.com/2011/02/change-system-screen-brightness-using.html

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只怪假的太真实 2024-11-18 07:02:12

设置应用程序这样做：

private static final int MINIMUM_BACKLIGHT = android.os.Power.BRIGHTNESS_DIM + 10;
private static final int MAXIMUM_BACKLIGHT = android.os.Power.BRIGHTNESS_ON;

System.putInt(getContext().getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, value + MINIMUM_BACKLIGHT);

但我怀疑如果没有系统共享用户 ID，您就无法更改系统设置

Settings application does it this way:

private static final int MINIMUM_BACKLIGHT = android.os.Power.BRIGHTNESS_DIM + 10;
private static final int MAXIMUM_BACKLIGHT = android.os.Power.BRIGHTNESS_ON;

System.putInt(getContext().getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, value + MINIMUM_BACKLIGHT);

but I suspect you cannot change a System Settings without having system shared user id

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情泪▽动烟 2024-11-18 07:02:12

在 androidMainfest.xml 中提供权限

<uses-permission android:name="android.permission.WRITE_SETTINGS"/>

并提供 0 到 255 之间的整数

//number>=0 && number<=255
//If you have passed context then you can use context.getContentResolver()
android.provider.Settings.System.putInt(cgetContentResolver(),
            android.provider.Settings.System.SCREEN_BRIGHTNESS,
            number);

Provide the permission in androidMainfest.xml

<uses-permission android:name="android.permission.WRITE_SETTINGS"/>

And provide a integer number between 0 to 255

//number>=0 && number<=255
//If you have passed context then you can use context.getContentResolver()
android.provider.Settings.System.putInt(cgetContentResolver(),
            android.provider.Settings.System.SCREEN_BRIGHTNESS,
            number);

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