Android 按键 按键调节亮度，亮度条不是等比减少/增加的

Posted 2022-01-05 王睿丶

frameworks/base/packages/SystemUI/src/com/android/systemui/settings/BrightnessController.java

底层算法得出来的结果依次为：35657、45474…64269对应着十个亮度档，所以我按照这个规则进行二次计算和判断即可

private void updateSlider(float brightnessValue, boolean inVrMode) 
        // Returns GAMMA_SPACE_MIN - GAMMA_SPACE_MAX
        int sliderVal = convertLinearToGammaFloat(brightnessValue, min, max);

        //进配合底层算法行二次计算
        if (sliderVal>0 && sliderVal<=35657)
            sliderVal = 6500;
        else if (sliderVal>35657 && sliderVal<=45474)
            sliderVal = 13000;
        else if (sliderVal>45474 && sliderVal<=50741)
            sliderVal = 19500;
        else if (sliderVal>50741 && sliderVal<=54361)
            sliderVal = 26000;
        else if (sliderVal>54361 && sliderVal<=57123)
            sliderVal = 32500;
        else if (sliderVal>57123 && sliderVal<=59357)
            sliderVal = 39000;
        else if (sliderVal>59357 && sliderVal<=61232)
            sliderVal = 45500;
        else if (sliderVal>61232 && sliderVal<=62848)
            sliderVal = 52000;
        else if (sliderVal>62848 && sliderVal<=64269)
            sliderVal = 58500;
        
        animateSliderTo(sliderVal);