RaspberryPi 上的 UWP C# BrightnessOverride Class

Question

我正在 Raspiberry Pi 上测试 brightnessoverride class UWP。我不确定它是否支持 Raspberry Pi RaspberryPi 官方 7" 触摸屏 LCD。

我正在尝试 setbrightnessvalue 如下；

            displayBrightness = BrightnessOverride.GetForCurrentView();
            displayBrightness.SetBrightnessLevel(0.50, DisplayBrightnessOverrideOptions.None);
            displayBrightness.StartOverride();

但我收到如下 exception 消息

"Error HRESULT E_FAIL has been returned from a call to a COM component."

谁能帮忙解释一下？ 谢谢。

Answer 1

BrightnessOverride API provides the ability to have per-application brightness control on devices that support controllable brightness.

要检查设备是否支持它，您可以检查BrightnessOverride.IsSupported。对于 Raspberry Pi 官方 7" 触摸屏，此值为 false。