Android 2.2：调整屏幕亮度

public void SetBright(float value) 
{
    Window mywindow = getWindow();

    WindowManager.LayoutParams lp = mywindow.getAttributes();

            lp.screenBrightness = value;

            mywindow.setAttributes(lp);
}

确保在设置屏幕亮度之前未启用“自动亮度”.如果您使用的是Android 2.2或更高版本的SDK,则可以在设置>显示或使用代码中手动执行此操作.

就像是：

int brightnessMode = SetTings.System.geTint(getContentResolver(),SetTings.System.SCREEN_BRIGHTnesS_MODE);
if (brightnessMode == SetTings.System.SCREEN_BRIGHTnesS_MODE_AUTOMATIC) {
    SetTings.System.puTint(getContentResolver(),SetTings.System.SCREEN_BRIGHTnesS_MODE,SetTings.System.SCREEN_BRIGHTnesS_MODE_MANUAL);
}

WindowManager.LayoutParams layoutParams = getWindow().getAttributes();
layoutParams.screenBrightness = 0.5F; // set 50% brightness
getWindow().setAttributes(layoutParams);

确保该值介于0.0F和1.0F之间.值-1.0F使用首选项中存储的默认亮度.根据文档“值小于0,默认值,意味着使用首选屏幕亮度.0到1调整亮度从暗到亮.”