How to set the brightness

最新推荐文章于 2025-06-29 16:39:59 发布
原创 最新推荐文章于 2025-06-29 16:39:59 发布 · 120 阅读 · 0 ·
CC 4.0 BY-SA版权
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
文章标签：

#移动开发

本文介绍如何在Android应用中调整屏幕亮度，并通过设置延迟来优雅地关闭应用，包括关键代码片段和实现步骤。适用于Android开发者的实践指南。 
android.provider.Settings.System.putInt(getContentResolver(),android.provider.Settings.System.SCREEN_BRIGHTNESS, brightness); // 0-255 
WindowManager.LayoutParams lp = getWindow().getAttributes();
lp.screenBrightness = brightness / 255.0f;
getWindow().setAttributes(lp);

 另外需要延迟关闭应用，大概需要延迟几百毫秒吧～

调节linux显示亮度和对比度的shell script
卖口粥-湛蓝的天空
08-06 435
相信很多童鞋发现自己的笔记本在安装unbutu/fedora这些linux distrobution后，通过Fn键无法修改亮度了吧。查了一些资料，发现是系统无法调用控制亮度，写了小脚本，方便大家使用： [code="bash"]#!/bin/bash value=$2 #init value usage(){ echo "Usage: $0 [-g][-b] " ...
How to save brightness settings?
一路走来@嵌入式
07-05 512
if you just wana change and save the screen brightness only, you can use xbacklight ~#:sudo apt-get install xbacklight after installing, type command to set the screen brightness easily
How to parse JSON in Java
u010029439的博客
12-29 191
JSON(JavaScript Object Notation) is a lightweight, text-based, language-independent data exchange format that is easy for humans and machines to read and write. JSON can represent two structured types: objects and arrays. An object is an unordered collect.
How to use the output tasks of HuggingGPT to generate machine learning code for GPT?
nenuyear
05-16 273
此段代码为gpt生成的代码，可用于连接机器学习里面的预处理函数，主函数框架，使得有预处理等算子就可以自动生成机器学习代码。1.假设hugginggpt的输出如下：（跑完hugginggpt的结果）
适配screen_brightness
坚果的博客
06-29 700
摘要： 本文介绍了如何为screen_brightness插件适配鸿蒙系统（OpenHarmony）。首先分析了现有screen插件不支持空安全的问题，推荐使用持续更新的screen_brightness库。文章详细讲解了适配步骤：1）准备Flutter开发环境；2）创建鸿蒙模块；3）编写Dart接口和配置文件；4）移植Android代码到鸿蒙平台。重点展示了目录结构分析和模块创建过程，包括删除不必要的文件，以及如何基于Android版本修改pubspec.yaml配置。该适配将帮助开发者在鸿蒙系统中实现屏
How to Create Your Own HDR Environment Maps
fatcat123的博客
05-29 969
做PBR 渲染连这些图是怎么来的都不知道，真是汗颜，哎，找了个sketchfab教程，哪天也试试。 原文链接如何制作HDRI 环境纹理贴图 How to Create Your Own HDR Environment Maps BACK TO OVERVIEW TUTORIALS 6 April 2016 HDR environment maps are an amazing way...
Information Visualization：How to discover and improve visual charts
XiaoLanQiu666的博客
12-10 551
Analysis and improvement of the chart “comparison of average total price of housing resources in Hangzhou city” 1. Background and why we choice the topic. 1.1 Background. At present, house prices are very high all over China, especially in the first tier c
How to add multiple filters to UIImage GPUImage?
凌风探梅的专栏
10-30 2035
from: http://www.scriptscoop.net/t/174138f67b0f/ios-how-to-add-multiple-filters-to-uiimage-gpuimage.html I noticed a lot of people asking questions about linking filters with GPUImage. I can't
Mini-guide to customise the modification of Google Camera
weixin_45427649的博客
07-19 355
Good day to all. I’ve been sitting for several months in the discussion of Google Camera modders and there are certain conclusions that even if there is a single opinion, not everyone knows which para...
sc – The layer whose extended range brightness is being specified currentBufferRatio – The current HDR/SDR ratio of the current buffer. For example if the buffer was rendered with a target SDR whitepoint of 100 nits and a max display brightness of 200 nits, this should be set to 2.0f. Default value is 1.0f. Transfer functions that encode their own brightness ranges, such as HLG or PQ, should also set this to 1.0f and instead communicate extended content brightness information via metadata such as CTA861_3 or SMPTE2086. Must be finite && >= 1.0f desiredRatio – The desired HDR/SDR ratio. This can be used to communicate the max desired brightness range. This is similar to the "max luminance" value in other HDR metadata formats, but represented as a ratio of the target SDR whitepoint to the max display brightness. The system may not be able to, or may choose not to, deliver the requested range. While requesting a large desired ratio will result in the most dynamic range, voluntarily reducing the requested range can help improve battery life as well as can improve quality by ensuring greater bit depth is allocated to the luminance range in use. Default value is 1.0f and indicates that extended range brightness is not being used, so the resulting SDR or HDR behavior will be determined entirely by the dataspace being used (ie, typically SDR however PQ or HLG transfer functions will still result in HDR) Must be finite && >= 1.0f
最新发布
08-13
For example, if the current frame buffer is using 50% of the maximum brightness that the display can handle, the `currentBufferRatio` would be set to 0.5. This parameter is essential for the display...
Observe present brightness on sensor setting Statistic brightness data Analyze present brightness and decide suitable brightness Guess how bright of environment Guess what exposure should be Change Exposure setting Set exposure setting Loop previous three steps to keep Brightness 上面这些时HOW to do AE的流程，帮我翻译一下
06-19
3. **分析亮度并确定目标亮度 (Analyze & Set Target Luminance)** - 基于预设曝光策略（如18%灰卡基准）： $$ L_{\text{target}} = \begin{cases} 50 \text{ cd/m}^2 & \text{(暗场景)} \\ 100 \text{ cd/m...
LED Brightness Control with Push Buttons Objective: Design and implement an embedded system using the Nucleo L432KC board and Mbed that allows users to control the brightness of an LED using push buttons. One button will increase the brightness, and the other button will decrease it. Show the demo to the GTA. What you will need: 1 x Nucleo L432KC development board 1 x LED 2 x Push buttons Resistors (if required for LED current limiting and/or for push buttons to pull up or down) Breadboard and jumper wires Setup: Connect an LED to the Nucleo L432KC board's pin. Connect two push buttons to the pins for brightness control. Initialisation: Define a PWM output for controlling LED brightness (led1). Define digital inputs for the two push buttons (button and button2). Main Program: Implement a loop to continuously monitor the state of the push buttons. When one button is pressed, set a flag to indicate the desired action (increase or decrease brightness). Adjust LED brightness gradually based on the button press: oIf the first button is pressed, increase brightness gradually. oIf the second button is pressed, decrease brightness gradually. oIf no button is pressed, toggle the LED on/off. Gradual Brightness Change: Use a loop to increment or decrement the LED brightness gradually. Use thread_sleep_for() to introduce delays for a smooth brightness transition. Testing: Test the functionality by pressing the buttons and observing the LED brightness changes. Verify that the LED turns on/off when no button is pressed. Documentation: Document the circuit connections, code explanation, and any observations during testing. Take note of any challenges faced and how they were resolved.
03-19
void adjust_brightness(int direction) { float duty = led_pwm.read(); duty += direction * 0.1f; // 每次调整10% duty = (duty > 1.0) ? 1.0 : (duty ) ? 0.0 : duty; led_pwm.write(duty); printf("当前...
Brightness Decide Guess how bright of environment Exposure setting at present as base EV Analyze statistic brightness information to know how much brightness difference is Different reflectance will confuse analysis of brightness Get environment brightness after combining base brightness and brightness difference Decide how bright the image should be Decide brightness target Normal target, such 18% gray Brighter target, such as Backlight, make object brighter Darker target, such as Night Scene, make sky darker. ww05
06-19
def set_exposure(ΔEV): if ΔEV > 0: # 需减光 shutter_speed *= 2^{ΔEV} # 优先提速快门 if shutter > max_speed: aperture *= 1.4 # 次选缩小光圈（√2倍） if aperture > f/16: ISO = max(ISO_min, ...
[Advanced篇] How to Call MATLAB from Python
# [Advanced] How to Call MATLAB from Python ## 2.1 Calling MATLAB via MatlabEngine ### 2.1.1 Installation and Configuration of MatlabEngine **Installing MatlabEngine** Install MatlabEngine in the ...
C++中获取系统时间类似于Java中的System.currentTimeMillis()
PC的€$~!@#%
01-01 981
Java中以毫秒级别返回系统时间的函数是:System.currentTimeMillis()，返回类型时64位的长整形数字。   而C++中有很多选择可以用来表示时间，这里选用了 gettimeofday() -- 获取当前时间(保存在结构体timeval中)   具体实现如下: #include <sys/time.h> #include <time.h&gt...
Android 设置/system/bin/cmd的权限遇到的问题
PC的€$~!@#%
11-25 945
Android开发的过程中，需要添加一些系统服务，而这些服务需要特殊的权限SUID。 关键点： 文件权限信息是保存在文件系统中的特殊位置的，不同文件系统间传输文件，可能导致权限信息的丢失 而像SUID这样的仅限信息，在相同文件系统cp时就不会携带 设置文件权限的方法在Android系统中有两种： init.rc阶段, 系统每次启动运行时处理 打包阶段: 含有文件系统的img文...
Android Build系统bash filename too long问题
PC的€$~!@#%
11-06 477
在对Android Build系统进行修改的过程中，可能会在整体编译时发现整个bash环境发生了变化。 如：filename too long等。且再运行其它command等时，都有可能出错。   在简单分析了整个编译系统后，发现在 source build/envsetup.sh时，会通过make(例如：get_build_var ANDROID_BUILD_PATHS：make --...
Android Dalvik VM GC options 命令控制参数
PC的€$~!@#%
04-06 363
} else if (strncmp(argv[i], "-Xgc:", 5) == 0) { //In VM thread, there is a register map for marking each stack item's status whether it is an object or internal value. And In GC step, only obje...
Linux下Android ADB驱动安装详解
PC的€$~!@#%
05-06 333
注意： 对应关系： lsusb: Bus 002 Device 021: ID 04e8:6860 Samsung Electronics Co., Ltd 对应rules： SUBSYSTEM=="usb", SYSFS{"Samsung Electronics Co., Ltd"}=="04e8", MODE="0666"   转载：http://...
评论
添加红包

请填写红包祝福语或标题

个

红包个数最小为10个

元

红包金额最低5元

当前余额3.43元 前往充值 >
需支付：10.00元
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付元
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明：

1.余额是钱包充值的虚拟货币，按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载，可以购买VIP、付费专栏及课程。

余额充值