frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java
public boolean panelsEnabled() {
final int disabled1 = getDisabled1(DEFAULT_DISPLAY);
final int disabled2 = getDisabled2(DEFAULT_DISPLAY);
return (disabled1 & StatusBarManager.DISABLE_EXPAND) == 0
&& (disabled2 & StatusBarManager.DISABLE2_NOTIFICATION_SHADE) == 0
&& !ONLY_CORE_APPS;
} public boolean panelsEnabled() {
return false;
}离线
关闭主菜单
device/softwinner/xxx-yyy/overlay/frameworks/base/core/res/res/values/config.xml
<bool name="config_showNavigationBar">true</bool>改为：
<bool name="config_showNavigationBar">false</bool>离线
命令行调整背光亮度：
input keyevent BRIGHTNESS_DOWN
input keyevent BRIGHTNESS_UP离线
请问安卓SDK如何控制屏幕亮度最小值，防止被用户设置全黑
https://whycan.com/t_11679.html
安卓SDK如何控制屏幕亮度最小值，防止被用户设置全黑
修改 device/softwinner/xxx-yyy/overlay/frameworks/base/core/res/res/values/config.xml
<integer name="config_screenBrightnessSettingMinimum">8</integer>改成
<integer name="config_screenBrightnessSettingMinimum">12</integer>---------------------------------------------------------------------------------
---------------------------------------------------------------------------------
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客户反应 A133背光调节不够线性
frameworks/base/packages/SettingsLib/src/com/android/settingslib/display/BrightnessUtils.java
源代码：
public static final int convertGammaToLinear(int val, int min, int max) {
final float normalizedVal = MathUtils.norm(0, GAMMA_SPACE_MAX, val);
final float ret;
if (normalizedVal <= R) {
ret = MathUtils.sq(normalizedVal / R);
} else {
ret = MathUtils.exp((normalizedVal - C) / A) + B;
}
// HLG is normalized to the range [0, 12], so we need to re-normalize to the range [0, 1]
// in order to derive the correct setting value.
return Math.round(MathUtils.lerp(min, max, ret / 12));
}添加调试后：
public static final int convertGammaToLinear(int val, int min, int max) {
final float normalizedVal = MathUtils.norm(0, GAMMA_SPACE_MAX, val);
final float ret;
if (normalizedVal <= R) {
ret = MathUtils.sq(normalizedVal / R);
} else {
ret = MathUtils.exp((normalizedVal - C) / A) + B;
}
int x = Math.round(MathUtils.lerp(min, max, ret / 12));
String message = String.format("----> linear min->%d, max=%d, val=%04d, x=%03d", min, max, val, x);
Log.e("AAAA", message);
// HLG is normalized to the range [0, 12], so we need to re-normalize to the range [0, 1]
// in order to derive the correct setting value.
return x;
}从左拖到右：
12-20 21:04:52.384 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=000, x=012
12-20 21:04:52.386 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=081, x=013
12-20 21:04:52.561 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=095, x=013
12-20 21:04:52.577 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=194, x=015
12-20 21:04:52.595 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=289, x=018
12-20 21:04:52.612 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=384, x=023
12-20 21:04:52.627 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=440, x=027
12-20 21:04:52.645 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=507, x=032
12-20 21:04:52.661 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=564, x=037
12-20 21:04:52.679 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=620, x=044
12-20 21:04:52.695 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=677, x=054
12-20 21:04:52.711 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=729, x=065
12-20 21:04:52.727 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=781, x=081
12-20 21:04:52.745 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=838, x=104
12-20 21:04:52.761 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=876, x=124
12-20 21:04:52.777 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=909, x=145
12-20 21:04:52.796 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=938, x=167
12-20 21:04:52.811 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=980, x=205
12-20 21:04:52.828 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=1014, x=244
12-20 21:04:52.844 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=1023, x=255
12-20 21:04:53.085 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=1023, x=255
12-20 21:04:53.097 2237 2237 E AAAA : AAAA ----> linear min->12, max=255, val=1023, x=255离线
看来得自己做一个对照表，
进度条是 [0..1023] <===> pwm值 [12..255]
离线