backlight

I was working on my app recently and wanted to change the brightness of the backlight. I then wanted to restore the backlight level to it's original setting on exiting the app. Here is the code: #include "GraphicsServices.h" - (void) viewWillAppear:(BOOL)animated { NSNumber* bl = (NSNumber*) CFPreferencesCopyAppValue(CFSTR("SBBacklightLevel"), CFSTR("com.apple.springboard")); // To retrieve backlight settings prevBacklightLevel = [bl floatValue]; GSEventSetBacklightLevel(0.5f); } // Other code here... - (void)applicationWillTerminate { GSEventSetBacklightLevel(prevBacklightLevel); // To

I searched around for a way to set the backlight level within an app on the iPhone. I found a solution here: http://www.iphonedevsdk.com/forum/29097-post3.html The problem I have is, when I add this to my app I get an error and a warning. My code is as follows: #include "GraphicsServices.h" - (void) viewWillAppear:(BOOL)animated { NSNumber *bl = (NSNumber*) CFPreferencesCopyAppValue(CFSTR("SBBacklightLevel" ), CFSTR("com.apple.springboard")); previousBacklightLevel = [bl floatValue]; //Error here : incompatible types in assignment [bl release]; GSEventSetBacklightLevel(0.5f); // Warning here :

Although I have a feeling that this isn't technically possible, it's worth asking anyways. Is it possible to turn on the Macbook Pro's keyboard backlights for individual keys? I am working on a piece of grid-based software which allows the user to navigate around by pressing any key on the keyboard to position the cursor at that point in the grid. It would be very cool if I could somehow just turn on the backlight for certain keys to give the user an easy way to see the current position of the cursor. Is it even possible for an application to control the keyboard backlighting at all, let alone

adb的全称为Android Debug Bridge.是android司机经常用到的工具.但是问题是那么多命令写代码已经够费劲了,过段时间在次使用时压根记不住呀.本次的大餐就是为此开篇的.这一次我们不记命令.要用随时过来ctrl+F呀.哇哈哈哈! 本篇ADB集锦不管是常用还是冷门的都有.客观您随意看.记不住没关系,收藏了再说呗. 你能在本篇文章中收获什么? adb基本指令 Shell AM&PM adb模拟用户事件 logcat日志 常用节点 远程ADB 常用命令集 一. 基本指令 进入指定设备 adb -s serialNumber shell 查看版本 adb version 查看日志 adb logcat 查看设备 adb devices 连接状态 adb get-state 启动ADB服务 adb start-server 停止ADB服务 adb kill-server 电脑推送到手机 adb push local remote 手机拉取到电脑 adb pull remote local 二. adb shell下的am 与 pm 注:am和pm命令必须先切换到adb shell模式下才能使用 am am全称activity manager，你能使用am去模拟各种系统的行为，例如去启动一个activity，强制停止进程，发送广播进程，修改设备屏幕属性等等。当你在adb

I have an android app which runs a foreground service and while that service is running I would like to give the user the option to keep the screen on. I added to my settings preferences, a checkbox preference and if true, I would like to keep the screen on but have it set to off by default. It's just something my users have asked for. Currently i have the preference on but when I run the service my screen still shuts of here is what I've done global variable private static final String PREFS_DEVICE = "DeviceInfo"; code and if statement SharedPreferences settings = getSharedPreferences(PREFS

Does the SDK provide any way to change the brightness of the backlight, or turn it off temporarily? No. This is not available in the SDK. If it's something you think would be useful, I suggest you file an enhancement request . I'm trying to do the same thing. As it happens there are a number posts out there in the internets with "solutions" for this. The most detailed is here This one is more succinct The problem is that I've tried these and they all rely on calling this function GSEventSetBacklightLevel(); which requires this header to be imported #import <GraphicsServices/GraphicsServices.h>