如何从JetPack组成的应用程序中控制设备屏幕的亮度？

发布于 2025-02-06 13:06:27 字数 101 浏览 3 评论 0原文

我正在制作一个简单的应用程序，我希望，当我按下按钮时，设备的亮度将设置为最大值，当我再次按下时，它会回到以前的状态。但是我在互联网上找不到任何方法，我一直在尝试几种方法，但我无法正常工作。

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丢了幸福的猪 2025-02-13 13:06:27

这是如何更改亮度的方法，

@Composable
fun UpdateBrightness() {
    val context = LocalContext.current
    DisposableEffect(Unit) {
        setBrightness(context, isFull = true)
        onDispose {
            setBrightness(context, isFull = false)
        }
    }
}

fun setBrightness(context: Context, isFull: Boolean) {
    val activity = context as? Activity ?: return
    val layoutParams: WindowManager.LayoutParams = activity.window.attributes
    layoutParams.screenBrightness = if (isFull) 1f else WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_NONE
    activity.window.attributes = layoutParams
}

@Composable
fun MyScreen() {
    UpdateBrightness() // Set maximum brightness by default
    ...
}

从本文中获取代码： https://medium.com/@yhdista/change-the--brightness-foror-the-the-screen-thinking-in-compose-84378dce3b6c

Here is how to change brightness

@Composable
fun UpdateBrightness() {
    val context = LocalContext.current
    DisposableEffect(Unit) {
        setBrightness(context, isFull = true)
        onDispose {
            setBrightness(context, isFull = false)
        }
    }
}

fun setBrightness(context: Context, isFull: Boolean) {
    val activity = context as? Activity ?: return
    val layoutParams: WindowManager.LayoutParams = activity.window.attributes
    layoutParams.screenBrightness = if (isFull) 1f else WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_NONE
    activity.window.attributes = layoutParams
}

@Composable
fun MyScreen() {
    UpdateBrightness() // Set maximum brightness by default
    ...
}

The code is taken from this article: https://medium.com/@yhdista/change-the-brightness-for-the-screen-thinking-in-compose-84378dce3b6c

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贱贱哒 2025-02-13 13:06:27

扩展@mikhail答案。如果使用片段，您可能需要对活动上下文进行一些挖掘

    private fun getActivityContext(currentContext: Context): Activity? {
    var context: Context? = currentContext
    while (context is ContextWrapper) {
        if (context is Activity) {
            return context
        }
        context = context.baseContext
    }
    return null
}

Extending @Mikhail answer. You may have to dig a little bit for activity context, if using fragments

    private fun getActivityContext(currentContext: Context): Activity? {
    var context: Context? = currentContext
    while (context is ContextWrapper) {
        if (context is Activity) {
            return context
        }
        context = context.baseContext
    }
    return null
}

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