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Samsung DeX | 应用与服务 | 三星电子 中国
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在Samsung Galaxy设备上使用Samsung DeX,可以大幅度地提高您的工作效率。从向朋友发送信息到同时观看电影和准备演示文稿,各种操作都可在大屏幕上实时切换。此外,无线DeX还能带来更多便利。使用智能平板时,选择您喜欢的模式:新DeX或经典DeX。在新DeX模式下,智能平板的用户界面保持不变,确保您的平板电脑使用体验得以延续。选择经典DeX模式,可将平板电脑界面转换为熟悉的电脑桌面环境。 进入设置>已连接的设备>自行选择Samsung DeX的新/经典模式。
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您在负责一个大项目吗?Samsung DeX无线协同应用可助您实现无缝演示。只需轻轻按下Galaxy设备上的DeX按钮,连接会议室中的三星智能电视,接下来就上演您的精彩表演吧!
*仅支持Android智能手机屏幕镜像(Miracast)的电视支持Samsung DeX线连接。
**性能可能因电视规格和WiFi环境的不同而异。建议使用2019年后推出的三星智能电视。
***请访问常见问题页面,以查看哪些Samsung Galaxy设备型号支持DeX无线连接。
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您的输入非常关键
使用您的Galaxy手机作为触摸板实现直观的手指操控和定制功能,或作为屏幕键盘与大屏显示器协同操作。
Samsung DeX平板电脑,如同PC般的功能
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通过Samsung DeX,在超薄智能平板上实现如同操作个人电脑一样的工作效率。只需轻点快速面板上的DeX按钮,就能让您像使用个人电脑那样使用平板电脑。同时打开多个窗口,将照片拖放到电子邮件中,右键单击实现更多功能。
*Samsung DeX模式:新模式:您可以在智能平板的主屏幕上使用相同的应用程序布局、部件、图标等。经典模式:您可以在类似台式电脑的环境中使用智能平板功能。
**仅支持部分Galaxy Tab型号,如Galaxy Tab S7、Galaxy Tab S8、Galaxy Tab S9。
如PC般地体验,只需轻轻一击
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*键盘保护套需单独购买
**功能键仅适用于部分型号
点击下载Samsung DeX应用程序后,即可在电脑上使用。
仅支持WINDOWS 10及以上版本
*DeX电脑版已不再支持Mac/Windows 7操作系统。 若有其他疑问或希望寻求帮助,请通过Samsung Members联系我们。
**USB-C转HDMI转换线及相关配件需单独购买。
***DeX电脑版仅适用于特定设备和Windows 10及以上版本操作系统。
****请访问常见问题页面,以获取有关设备及软件兼容性的完整列表。
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*仅指定的Galaxy Note和Tab设备支持Samsung DeX。
** 在搭载Android Pie OS的旧机型上运行多个应用程序或高性能游戏可能会导致设备运行速度变慢。
*** 某些应用程序可能无法在 Samsung DeX 上运行或需要单独的许可证(需购买)。
**** 通过HDMI适配器或数据线实现的部分Samsung DeX功能可能与通过DeX中心和DeX Pad实现时不同。
***** 屏幕内容为模拟图像,仅供演示目的。
****** 配件单独销售。
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Samsung DeX enables you to turn your Galaxy S8 and later into a true desktop PC experience. When connecting a supported UBS-C to HDMI cable or adapter your phone will launch DeX mode on the connected external monitor and you can enjoy a desktop experience. Connect a mouse, keyboard, and Ethernet cable for added productivity.
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With the Samsung DeX, you can use your mobile device’s features on a wider screen by connecting to a TV or monitor. You can also connect with nearby devices, such as a keyboard or mouse.
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Samsung DeX 的常见问题 | 三星电子 CN
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Samsung DeX 的常见问题
最后更新日期 : 2023年9月25日
什么是 Samsung DeX
三星提供了许多应用程序,使您的工作日更轻松,Samsung DeX是其中之一。它是通过将手机连接到外部显示器(电视/显示器)或电脑上,为您提供类似电脑上的操作体验
Samsung DeX 支持的移动设备
智能手机:DeX 适用于 Galaxy S9、S10、S20、S21、S22系列和S23系列
平板电脑:DeX 适用于 Galaxy Tab S4、S5e、S6、S7 、S8 系列和S9系列平板电脑
如果您想了解更多有关Samsung DeX的信息,请访问Samsung DeX官方网址
如何使用 Samsung DeX
为了使用Samsung DeX,您可能需要根据情况购买单独的配件
使用线缆连接到外部显示器(电视或显示器)时
要使用Samsung DeX,您必须购买 DeX扩展坞、DeX Pad 或 HDMI 适配器,并将移动设备连接到外部显示器(电视或显示器)
使用线缆连接到电脑时
您必须使用USB Type-C线缆将手机连接到电脑
无线连接到电视或电脑时
无需配件
哪些配件正式支持三星DeX
官方支持的智能手机通过有线连接使用Samsung DeX的配件
支持Samsung DeX 的正品配件:DeX扩展坞(EE-MG950)、DeX Pad (EE-M5100)、HDMI 适配器(EE-HG950、EE-P5000、EE-I3100、EE-P3200 和 EE-P5400)
注意:
型号的产品名称可能因国家/地区而异,不是正版Samsung DeX支持的产品可能不兼容
如何在平板电脑上使用Samsung DeX
您可以通过以下三种方式,在平板电脑上使用Samsung DeX
直接在平板电脑的触摸屏上使用Samsung DeX(无需连接外部显示器)。通过从屏幕顶部向下滑动打开【通知】面板,然后在【快速设置】菜单中选择DeX图标
通过HDMI适配器连接显示器或电视,以便在大屏幕上使用Samsung DeX
通过无线方式连接电视,在大屏幕上使用Samsung DeX。通过从平板电脑屏幕顶部向下滑动打开【通知】面板,然后长按【快速设置】菜单中的DeX图标,您可以搜索可用于连接的显示器,并以无线方式连接选定的显示器
如何将电视或显示器无线连接到Samsung DeX
找到手机上的【快速设置】菜单,然后按DeX按钮打开该功能
选择电视或显示器版DeX,如果出现【电脑版DeX】而不是选择选项,请选择窗口右上角的【更多选项】,然后按切换到电视或显示器
从可用设备列表中选择要连接的电视或显示器,然后按【立即开始】
接受电视或显示器上的连接请求
按照屏幕上的说明完成连接,完成后,Samsung DeX屏幕将显示在连接的电视或显示器上
注意:
性能可能取决于用于无线连接的电视的规格,我们建议使用2019年或之后发布的三星智能电视
如果周围的无线网络不稳定,则可能会导致性能较差,请稍后再次尝试连接
建议要将移动设备和电视连接到5GHz带宽的WLAN上,以保证流畅运行。若电视不支持5 GHz频段WLAN,则DeX可能无法正常工作,请向制造商查询电视规格
建议在移动设备和电视之间保持较近的距离,以实现流畅的无线连接
我可以在哪些电脑上使用Samsung DeX
您的电脑需要满足以下系统要求才能运行Samsung DeX
操作系统:Windows 10 (32/64 位) 以上
CPU:英特尔酷睿 i3 2.4 GHz处理器或更高版本(建议使用英特尔酷睿 i5 2.5 GHz或更高)或者高通骁龙8cx或更高版本
内存:至少4GB(推荐8GB)
硬盘空间:至少500MB(推荐1GB)
USB :1个USB 2.0 端口(建议使用USB 3.0)
屏幕分辨率:至少1024 X 768
若您的设备不满足最低要求,Samsung DeX可能无法正常工作
如何使用无线连接到的电脑
打开移动设备上的通知面板,然后向下拖动该面板,接下来,长按DeX 按钮打开该功能
选择电脑版DeX,如果出现【电视或显示器上的DeX】而不是选择选项,请选择窗口右上角的【更多选项】,然后切换到电脑版
从可用设备列表中选择要连接的电脑,然后按立即开始
在电脑上接受连接请求
按照屏幕上的说明完成连接,完成后三星DeX屏幕将出现在连接的PC上
. Samsung DeX 必须安装在您的计算机上,请访问www.samsungdex.com 以下载和安装程序
. 如果电脑未运行“Samsung DeX”,请先运行“Samsung DeX”程序
. 检查电脑和移动设备之间的WLAN连接,尝试连接的电脑和移动设备必须共享同一个WLAN网络
. 为了顺利进行无线连接,请确保您的电脑和手机已经连接到5 GHz带宽连接到同一个WLAN网络
. 不支持在 Windows 中使用“连接”功能进行无线连接
注意:
您必须在您的电脑上安装Samsung DeX ,请访问以下网址www.samsungdex.com下载和安装程序
如果电脑未运行Samsung DeX,请先运行Samsung DeX程序
检查电脑和移动设备之间的WLAN连接,尝试连接的电脑和移动设备必须共享同一个WLAN网络
为了顺利进行无线连接,请确保您的电脑和手机已经通过5GHz带宽连接到同一个WLAN网络
不支持在Windows中使用【连接】功能进行无线连接
如果 Samsung DeX 出现错误如何处理
如果您报告在使用 Samsung DeX 时发生的任何错误,我们将能够通过修复错误和提供更新来改进服务。请注意,错误报告包含日志数据,并且可能包含一些个人信息
如何在 Samsung DeX 中报告问题
转到Samsung DeX 设置或 Samsung DeX 屏幕左下方的【应用程序】按钮
选择【联系我们】
选择【报告错误】
描述您遇到的错误,勾选【发送系统日志数据】复选框并选择报告
如何从 Samsung DeX 网站报告问题
问题出现后,单击DeX的PC程序运行窗口顶部栏上的【设置】图标
单击设置屏幕底部的【报告错误】选项,如果您的手机此时已连接到您的电脑,则会向您的手机发送错误报告通知
此时将在您的电脑桌面上创建一个日志数据文件
创建日志数据文件后,单击【报告问题】按钮
点击报告后自动会自动跳转至报告上传页面
登陆您的三星帐户,按照步骤操作即可
注意:请将生成的数据文件添加到附件
Samsung DeX 屏幕不显示在显示器或电视上
通过有线连接到显示器或电视
检查并确保连接线是HDMI,且连接线为支持的Samsung DeX的官方配件
确保选择HDMI作为显示器/电视的输入,请将显示器/电视的输入更改为HDMI
如果显示器/电视上显示的屏幕是设备屏幕的镜像而不是 Samsung DeX屏幕,请从屏幕顶部向下滑动打开移动设备上的通知面板,然后在【快速设置】菜单中选择DeX
检查您的设备是否处于最大省电模式、安全模式、紧急模式或儿童模式,如果您的设备处于这些模式中的任何一种,请在连接前通过【设置】关闭该模式
如果智能手机或平板电脑的端口有水,屏幕可能无法正确显示在显示器或电视上
请注意:如果您希望每次连接显示器或电视时都启动Samsung DeX,请进如设置中的【高级功能】→【Samsung DeX】,然后启用【连接HDMI时自动启动】
通过无线连接到显示器或电视
对于2013年发布的三星电视,请更新固件并尝试重新连接
如果在显示【Connecting…】一段时间后连接失败,请断开并重新连接电视
Samsung DeX 屏幕不显示在电脑上
通过有线连接到电脑
请确保【Samsung DeX】图标出现在电脑任务栏的系统托盘中,如果没有,请先运行【Samsung DeX】程序
当Samsung DeX在您的电脑上运行时,断开然后重新连接您的USB线,一旦您的电脑识别出您的移动设备,电脑屏幕上将出现加载屏幕,在您的移动设备上,按下【将屏幕发送到 Samsung DeX】弹出消息中的【立即开始】按钮,然后Samsung DeX主屏幕将出现在电脑屏幕上
如果重新连接USB数据线后仍无法看到Samsung DeX主屏幕,请尝试以下操作: 请检查电脑安装的DeX应用程序是否为最新版本,您可以通过单击窗口标题栏右上角的【设置】按钮和【关于 Samsung DeX】下的【更新】按钮来检查版本,更新应用程序后重新启动您的电脑
如果USB线损坏,您可能无法连接,尝试使用不同的USB线进行连接
公司电脑和公共电脑通常安装了自己的安全软件,因此您可能无法通过USB连接,如果您无法通过USB连接到电脑,请联系相关管理员
请注意:对于运行Windows的电脑,请在【任务管理器】→ 【服务列表中】检查 ss_conn_service2 项的状态是否为正在运行,如果状态设置为【正在停止】,请右键单击它并选择【开始】以更改状态
通过无线连接到电脑
查看您是否安装了最新版本的Samsung DeX,请单击窗口标题栏右上角的【设置】图标→【关于 Samsung DeX】→【更新】按钮
确保Samsung DeX图标出现在电脑任务栏的系统托盘中,如果没有,请运行【Samsung DeX】程序
检查您的电脑和移动设备上的WLAN连接,您的电脑和您尝试连接的移动设备必须共享同一个Wi-Fi AP(接入点)
在您的移动设备上打开通知面板并向下滑动以单击DeX 按钮,接下来选择电脑上的 DeX
从找到的设备列表中,选择要连接的电脑,然后按【立即开始】,接下来在您的计算机上接受连接请求,Samsung DeX主屏幕随后将出现在您的电脑屏幕上
请注意:如果出现【电视或显示器上的 DeX】而不是选择选项,请选择窗口右上角的【更多选项】图标,然后按切换到电脑
设备无法搜索到电脑
确保您的电脑上安装了Samsung DeX
还要确保Samsung DeX已开启,若没有,请先运行 Samsung DeX 程序
检查电脑和移动设备中的WLAN连接,您尝试连接的电脑和移动设备必须共享同一个 Wi-Fi AP(接入点)
如何使用 Samsung DeX 中的功能
当您使用Samsung DeX时,可能会出现许多问题,了解所有功能可帮助您以最有效的方式使用Samsung DeX
如何更改键盘语言或添加新键盘语言
选择【设置】菜单,然后点击【常规管理】选项
单击【三星键盘】,然后转到语言和类型
在下一个屏幕上,点击【管理输入语言】并添加输入语言
要选择您刚刚添加的输入语言,请转到【常规管理】选项
点击【物理键盘】,然后选择您刚刚添加的输入语言
选择语言后,您将看到Android操作系统支持的键盘布局,选择您使用的键盘硬件的布局
若要使用快捷键更改语言,可以使用键盘快捷键更改输入语言,例如 [Shift]+[Space]、[Control]+[Space] 或 [Left Alt] + [Shift]。要打开或关闭某些键盘快捷键,请在物理键盘的设置中选择【更改语言快捷键】
某些应用程序在使用Samsung DeX模式时显示黑屏
某些需要保护内容的应用(如视频播放器、移动银行应用或安全解决方案)具有自己的安全功能,因此他们的屏幕显示为黑色或您只能听到音频。在这种情况下,如果您通过有线将移动设备连接到外部显示设备(例如电视或显示器)以使用Samsung DeX,则应用程序屏幕将显示为正常
使用键盘或鼠标在Samsung DeX上玩游戏
要在Samsung DeX上使用键盘或鼠标玩游戏,游戏应用需要支持键盘和鼠标输入,请联系应用开发者寻求帮助
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Android逆向笔记 —— DEX 文件格式解析 - 知乎
Android逆向笔记 —— DEX 文件格式解析 - 知乎首发于Android 逆向笔记切换模式写文章登录/注册Android逆向笔记 —— DEX 文件格式解析路遥DEX 文件结构思维导图及解析源码见文末。往期目录:Class 文件格式详解 Smali 语法解析——Hello World Smali —— 数学运算,条件判断,循环 Smali 语法解析 —— 类 Android逆向笔记 —— AndroidManifest.xml 文件格式解析 系列第一篇文章就分析过 Class 文件格式,我们都知道 .java 源文件经过编译器编译会生成 JVM 可识别的 .class 文件。在 Android 中,不管是 Dalvik 还是 Art,和 JVM 的区别还是很大的。Android 系统并不直接使用 Class 文件,而是将所有的 Class 文件聚合打包成 DEX 文件,DEX 文件相比单个单个的 Class 文件更加紧凑,可以直接在 Android Runtime 下执行。对于学习热修复框架,加固和逆向相关知识,了解 DEX 文件结构是很有必要的。再之前解析过 Class 文件和 AndroidManifest.xml 文件结构之后,发现看二进制文件看上瘾了。。后面会继续对 Apk 文件中的其他文件结构进行分析,例如 so 文件,resources.arsc 文件等。DEX 文件的生成在解析 DEX 文件结构之前,先来看看如何生成 DEX 文件。为了方便解析,本篇文章中就不从市场上的 App 里拿 DEX 文件过来解析了,而是手动生成一个最简单的 DEX 文件。还是以 Class 文件解析时候用的例子:public class Hello {
private static String HELLO_WORLD = "Hello World!";
public static void main(String[] args) {
System.out.println(HELLO_WORLD);
}
}
首先 javac 编译成 Hello.class 文件,然后利用 Sdk 自带的 dx 工具生成 DEX 文件:dx --dex --output=Hello.dex Hello.class
dx 工具位于 Sdk 的 build-tools 目录下,可添加至环境变量方便调用。dx 也支持多 Class 文件生成 dex。DEX 文件结构概览关于 DEX 文件结构的学习,给大家推荐两个资料。第一个是看雪神图,出自非虫,第二个是 Android 源码中对 DEX 文件格式的定义,dalvik/libdex/DexFile.h,其中详细定义了 DEX 文件中的各个部分。第三个是 010 Editor,在之前解析 AndroidManifest.xml 文件格式解析 也介绍过,它提供了丰富的文件模板,支持常见文件格式的解析,可以很方便的查看文件结构中的各个部分及其对应的十六进制。一般我在代码解析文件结构的时候都是对照着 010 Editor 来进行分析。下面贴一张 010 Editor 打开之前生成的 Hello.dex 文件的截图:我们可以一目了然的看到 DEX 的文件结构,着实是一个利器。在详细解析之前,我们先来大概给 DEX 文件分个层,如下图所示: 文末我放了一张详细的思维导图,也可以对着思维导图来阅读文章。 依次解释一下:header : DEX 文件头,记录了一些当前文件的信息以及其他数据结构在文件中的偏移量string_ids : 字符串的偏移量type_ids : 类型信息的偏移量proto_ids : 方法声明的偏移量field_ids : 字段信息的偏移量method_ids : 方法信息(所在类,方法声明以及方法名)的偏移量class_def : 类信息的偏移量data : : 数据区link_data : 静态链接数据区从 header 到 data 之间都是偏移量数组,并不存储真实数据,所有数据都存在 data 数据区,根据其偏移量区查找。对 DEX 文件有了一个大概的认识之后,我们就来详细分析一下各个部分。headerDEX 文件头部分的具体格式可以参考 DexFile.h 中的定义:struct DexHeader {
u1 magic[8]; // 魔数
u4 checksum; // adler 校验值
u1 signature[kSHA1DigestLen]; // sha1 校验值
u4 fileSize; // DEX 文件大小
u4 headerSize; // DEX 文件头大小
u4 endianTag; // 字节序
u4 linkSize; // 链接段大小
u4 linkOff; // 链接段的偏移量
u4 mapOff; // DexMapList 偏移量
u4 stringIdsSize; // DexStringId 个数
u4 stringIdsOff; // DexStringId 偏移量
u4 typeIdsSize; // DexTypeId 个数
u4 typeIdsOff; // DexTypeId 偏移量
u4 protoIdsSize; // DexProtoId 个数
u4 protoIdsOff; // DexProtoId 偏移量
u4 fieldIdsSize; // DexFieldId 个数
u4 fieldIdsOff; // DexFieldId 偏移量
u4 methodIdsSize; // DexMethodId 个数
u4 methodIdsOff; // DexMethodId 偏移量
u4 classDefsSize; // DexCLassDef 个数
u4 classDefsOff; // DexClassDef 偏移量
u4 dataSize; // 数据段大小
u4 dataOff; // 数据段偏移量
};
其中的 u 表示无符号数,u1 就是 8 位无符号数,u4 就是 32 位无符号数。magic 一般是常量,用来标记 DEX 文件,它可以分解为:文件标识 dex + 换行符 + DEX 版本 + 0
字符串格式为 dex\n035\0,十六进制为 0x6465780A30333500。checksum 是对去除 magic 、 checksum 以外的文件部分作 alder32 算法得到的校验值,用于判断 DEX 文件是否被篡改。signature 是对除去 magic 、 checksum 、 signature 以外的文件部分作 sha1 得到的文件哈希值。endianTag 用于标记 DEX 文件是大端表示还是小端表示。由于 DEX 文件是运行在 Android 系统中的,所以一般都是小端表示,这个值也是恒定值 0x12345678。其余部分分别标记了 DEX 文件中其他各个数据结构的个数和其在数据区的偏移量。根据偏移量我们就可以轻松的获得各个数据结构的内容。下面顺着上面的 DEX 文件结构来认识第一个数据结构 string_ids。string_idsstruct DexStringId {
u4 stringDataOff;
};
string_ids 是一个偏移量数组,stringDataOff 表示每个字符串在 data 区的偏移量。根据偏移量在 data 区拿到的数据中,第一个字节表示的是字符串长度,后面跟着的才是字符串数据。这块逻辑比较简单,直接看一下代码:private void parseDexString() {
log("\nparse DexString");
try {
int stringIdsSize = dex.getDexHeader().string_ids__size;
for (int i = 0; i < stringIdsSize; i++) {
int string_data_off = reader.readInt();
byte size = dexData[string_data_off]; // 第一个字节表示该字符串的长度,之后是字符串内容
String string_data = new String(Utils.copy(dexData, string_data_off + 1, size));
DexString string = new DexString(string_data_off, string_data);
dexStrings.add(string);
log("string[%d] data: %s", i, string.string_data);
}
} catch (IOException e) {
e.printStackTrace();
}
}
打印结果如下:parse DexString
string[0] data:
string[1] data:
string[2] data: HELLO_WORLD
string[3] data: Hello World!
string[4] data: Hello.java
string[5] data: LHello;
string[6] data: Ljava/io/PrintStream;
string[7] data: Ljava/lang/Object;
string[8] data: Ljava/lang/String;
string[9] data: Ljava/lang/System;
string[10] data: V
string[11] data: VL
string[12] data: [Ljava/lang/String;
string[13] data: main
string[14] data: out
string[15] data: println
其中包含了变量名,方法名,文件名等等,这个字符串池在后面其他结构的解析中也会经常遇到。type_idsstruct DexTypeId {
u4 descriptorIdx;
};
type_ids 表示的是类型信息,descriptorIdx 指向 string_ids 中元素。根据索引直接在上一步读取到的字符串池即可解析对应的类型信息,代码如下:private void parseDexType() {
log("\nparse DexTypeId");
try {
int typeIdsSize = dex.getDexHeader().type_ids__size;
for (int i = 0; i < typeIdsSize; i++) {
int descriptor_idx = reader.readInt();
DexTypeId dexTypeId = new DexTypeId(descriptor_idx, dexStringIds.get(descriptor_idx).string_data);
dexTypeIds.add(dexTypeId);
log("type[%d] data: %s", i, dexTypeId.string_data);
}
} catch (IOException e) {
e.printStackTrace();
}
}
解析结果:parse DexType
type[0] data: LHello;
type[1] data: Ljava/io/PrintStream;
type[2] data: Ljava/lang/Object;
type[3] data: Ljava/lang/String;
type[4] data: Ljava/lang/System;
type[5] data: V
type[6] data: [Ljava/lang/String;
proto_idsstruct DexProtoId {
u4 shortyIdx; /* index into stringIds for shorty descriptor */
u4 returnTypeIdx; /* index into typeIds list for return type */
u4 parametersOff; /* file offset to type_list for parameter types */
};
proto_ids 表示方法声明信息,它包含以下三个变量:shortyIdx : 指向 string_ids ,表示方法声明的字符串returnTypeIdx : 指向 type_ids ,表示方法的返回类型 parametersOff : 方法参数列表的偏移量方法参数列表的数据结构在 DexFile.h 中用 DexTypeList 来表示:struct DexTypeList {
u4 size; /* #of entries in list */
DexTypeItem list[1]; /* entries */
};
struct DexTypeItem {
u2 typeIdx; /* index into typeIds */
};
size 表示方法参数的个数,参数用 DexTypeItem 表示,它只有一个属性 typeIdx,指向 type_ids 中对应项。具体的解析代码如下:private void parseDexProto() {
log("\nparse DexProto");
try {
int protoIdsSize = dex.getDexHeader().proto_ids__size;
for (int i = 0; i < protoIdsSize; i++) {
int shorty_idx = reader.readInt();
int return_type_idx = reader.readInt();
int parameters_off = reader.readInt();
DexProtoId dexProtoId = new DexProtoId(shorty_idx, return_type_idx, parameters_off);
log("proto[%d]: %s %s %d", i, dexStringIds.get(shorty_idx).string_data,
dexTypeIds.get(return_type_idx).string_data, parameters_off);
if (parameters_off > 0) {
parseDexProtoParameters(parameters_off);
}
dexProtos.add(dexProtoId);
}
} catch (IOException e) {
e.printStackTrace();
}
}
解析结果:parse DexProto
proto[0]: V V 0
proto[1]: VL V 412
parameters[0]: Ljava/lang/String;
proto[2]: VL V 420
parameters[0]: [Ljava/lang/String;
field_idsstruct DexFieldId {
u2 classIdx; /* index into typeIds list for defining class */
u2 typeIdx; /* index into typeIds for field type */
u4 nameIdx; /* index into stringIds for field name */
};
field_ids 表示的是字段信息,指明了字段所在的类,字段的类型以及字段名称,在 DexFile.h 中定义为 DexFieldId , 其各个字段含义如下:classIdx : 指向 type_ids ,表示字段所在类的信息typeIdx : 指向 ype_ids ,表示字段的类型信息nameIdx : 指向 string_ids ,表示字段名称代码解析很简单,就不贴出来了,直接看一下解析结果:parse DexField
field[0]: LHello;->HELLO_WORLD;Ljava/lang/String;
field[1]: Ljava/lang/System;->out;Ljava/io/PrintStream;
method_idsstruct DexMethodId {
u2 classIdx; /* index into typeIds list for defining class */
u2 protoIdx; /* index into protoIds for method prototype */
u4 nameIdx; /* index into stringIds for method name */
};
method_ids 指明了方法所在的类、方法声明以及方法名。在 DexFile.h 中用 DexMethodId 表示该项,其属性含义如下:classIdx : 指向 type_ids ,表示类的类型protoIdx : 指向 type_ids ,表示方法声明nameIdx : 指向 string_ids ,表示方法名解析结果:parse DexMethod
method[0]: LHello; proto[0]
method[1]: LHello; proto[0]
method[2]: LHello; proto[2] main
method[3]: Ljava/io/PrintStream; proto[1] println
method[4]: Ljava/lang/Object; proto[0]
class_defstruct DexClassDef {
u4 classIdx; /* index into typeIds for this class */
u4 accessFlags;
u4 superclassIdx; /* index into typeIds for superclass */
u4 interfacesOff; /* file offset to DexTypeList */
u4 sourceFileIdx; /* index into stringIds for source file name */
u4 annotationsOff; /* file offset to annotations_directory_item */
u4 classDataOff; /* file offset to class_data_item */
u4 staticValuesOff; /* file offset to DexEncodedArray */
};
class_def 是 DEX 文件结构中最复杂也是最核心的部分,它表示了类的所有信息,对应 DexFile.h 中的 DexClassDef :classIdx : 指向 type_ids ,表示类信息accessFlags : 访问标识符superclassIdx : 指向 type_ids ,表示父类信息interfacesOff : 指向 DexTypeList 的偏移量,表示接口信息sourceFileIdx : 指向 string_ids ,表示源文件名称annotationOff : 注解信息classDataOff : 指向 DexClassData 的偏移量,表示类的数据部分staticValueOff :指向 DexEncodedArray 的偏移量,表示类的静态数据DefCLassData重点是 classDataOff 这个字段,它包含了一个类的核心数据,在 Android 源码中定义为 DexClassData ,它不在 DexFile.h 中了,而是在 DexClass.h 中:struct DexClassData {
DexClassDataHeader header;
DexField* staticFields;
DexField* instanceFields;
DexMethod* directMethods;
DexMethod* virtualMethods;
};
DexClassDataHeader 定义了类中字段和方法的数目,它也定义在 DexClass.h 中:struct DexClassDataHeader {
u4 staticFieldsSize;
u4 instanceFieldsSize;
u4 directMethodsSize;
u4 virtualMethodsSize;
};
staticFieldsSize : 静态字段个数instanceFieldsSize : 实例字段个数directMethodsSize : 直接方法个数virtualMethodsSize : 虚方法个数在读取的时候要注意这里的数据是 LEB128 类型。它是一种可变长度类型,每个 LEB128 由 1~5 个字节组成,每个字节只有 7 个有效位。如果第一个字节的最高位为 1,表示需要继续使用第 2 个字节,如果第二个字节最高位为 1,表示需要继续使用第三个字节,依此类推,直到最后一个字节的最高位为 0,至多 5 个字节。除了 LEB128 以外,还有无符号类型 ULEB128。那么为什么要使用这种数据结构呢?我们都知道 Java 中 int 类型都是 4 字节,32 位的,但是很多时候根本用不到 4 个字节,用这种可变长度的结构,可以节省空间。对于运行在 Android 系统上来说,能多省一点空间肯定是好的。下面给出了 Java 读取 ULEB128 的代码:public static int readUnsignedLeb128(byte[] src, int offset) {
int result = 0;
int count = 0;
int cur;
do {
cur = copy(src, offset, 1)[0];
cur &= 0xff;
result |= (cur & 0x7f) << count * 7;
count++;
offset++;
DexParser.POSITION++;
} while ((cur & 0x80) == 128 && count < 5);
return result;
}
继续回到 DexClassData 中来。header 部分定义了各种字段和方法的个数,后面跟着的分别就是 静态字段 、实例字段 、直接方法 、虚方法 的具体数据了。字段用 DexField 表示,方法用 DexMethod 表示。DexFieldstruct DexField {
u4 fieldIdx; /* index to a field_id_item */
u4 accessFlags;
};
fieldIdx : 指向 field_ids ,表示字段信息accessFlags :访问标识符DexMethodstruct DexMethod {
u4 methodIdx; /* index to a method_id_item */
u4 accessFlags;
u4 codeOff; /* file offset to a code_item */
46};
method_idx 是指向 method_ids 的索引,表示方法信息。accessFlags 是该方法的访问标识符。codeOff 是结构体 DexCode 的偏移量。如果你坚持看到了这里,是不是发现说到现在还没说到最重要的东西,DEX 包含的代码,或者说指令,对应的就是 Hello.java 中的 main 方法。没错,DexCode 就是用来存储方法的详细信息以及其中的指令的。struct DexCode {
u2 registersSize; // 寄存器个数
u2 insSize; // 参数的个数
u2 outsSize; // 调用其他方法时使用的寄存器个数
u2 triesSize; // try/catch 语句个数
u4 debugInfoOff; // debug 信息的偏移量
u4 insnsSize; // 指令集的个数
u2 insns[1]; // 指令集
/* followed by optional u2 padding */ // 2 字节,用于对齐
/* followed by try_item[triesSize] */
/* followed by uleb128 handlersSize */
/* followed by catch_handler_item[handlersSize] */
};
我们打开 010 Editor,定位到 main() 方法对应的 DexCode,对照进行分析:public class Hello {
private static String HELLO_WORLD = "Hello World!";
public static void main(String[] args) {
System.out.println(HELLO_WORLD);
}
}
main() 方法对应的 DexCode 十六进制表示为 :03 00 01 00 02 00 00 00 00 00 79 02 00 00 08 00
62 00 01 00 62 01 00 00 6E 20 03 00 01 00 0E 00
使用的寄存器个数是 3 个。参数个数是 1 个,就是 main() 方法中的 String[] args。调用外部方法时使用的寄存器个数为 2 个。指令个数是 8 。终于说到指令了,main() 函数中有 8 条指令,就是上面十六进制中的第二行。尝试来解析一下这段指令。Android 官网就有 Dalvik 指令的相关介绍,链接。第一个指令 62 00 01 00,查询文档 62 对应指令为 sget-object vAA, field@BBBB,AA 对应 00 , 表示 v0 寄存器。BBBB 对应 01 00 ,表示 field_ids 中索引为 1 的字段,根据前面的解析结果该字段为 Ljava/lang/System;->out;Ljava/io/PrintStream,整理一下,62 00 01 00 表示的就是:sget-object v0, Ljava/lang/System;->out:Ljava/io/PrintStream;
接着是 62 01 00 00。还是 sget-object vAA, field@BBBB, AA 对应 01 ,BBBB 对应 0000, 使用的是 v1 寄存器,field 位 field_ids 中索引为 0 的字段,即 LHello;->HELLO_WORLD;Ljava/lang/String,该句完整指令为:sget-object v1, LHello;->HELLO_WORLD:Ljava/lang/String;
接着是 6E 20 03 00, 查看文档 6E 指令为 invoke-virtual {vC, vD, vE, vF, vG}, meth@BBBB。6E 后面一个十六位 2 表示调用方法是两个参数,那么 BBBB 就是 03 00,指向 method_ids 中索引为 3 方法。根据前面的解析结果,该方法就是 Ljava/io/PrintStream;->println(Ljava/lang/String;)V。完整指令为:invoke-virtual {v0, v1}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V
最后的 0E,查看文档该指令为 return-void,到这 main() 方法就结束了。将上面几句指令放在一起:62 00 01 00 : sget-object v0, Ljava/lang/System;->out:Ljava/io/PrintStream;
62 01 00 00 : sget-object v1, LHello;->HELLO_WORLD:Ljava/lang/String;
6E 20 03 00 : invoke-virtual {v0, v1}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V
OE OO : return-void
这就是 main() 方法的完整指令了。还记得我之前的一篇文章 Smali 语法解析——Hello World,其实这个解析结果和 Hello.java 对应的 smali 代码是一致的:.method public static main([Ljava/lang/String;)V
.registers 3
.prologue
.line 6
sget-object v0, Ljava/lang/System;->out:Ljava/io/PrintStream;
sget-object v1, LHello;->HELLO_WORLD:Ljava/lang/String;
invoke-virtual {v0, v1}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V
.line 7
return-void
.end method
总结这种文章真的是又臭又长,但是耐下心去看,还是会有很大收货的。最后来一张思维导图总结一下:Java 版本 DEX 文件格式解析源码,点我 DexParser 文章首发微信公众号: 秉心说 , 专注 Java 、 Android 原创知识分享,LeetCode 题解。 更多 JDK 源码解析,扫码关注我吧! 编辑于 2019-05-23 22:40Android软件逆向工程赞同 221 条评论分享喜欢收藏申请转载文章被以下专栏收录Android 逆
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合上电脑,与三星 DeX 度过一周 - 少数派
合上电脑,与三星 DeX 度过一周 - 少数派
PRIMEMatrix栏目Pi Store更多 无需申请,自由写作 任何用户都可使用写作功能。成功发布 3 篇符合基本规则的内容,可成为正式作者。了解更多退出登录反馈PRIMEMatrix栏目Pi Store更多 合上电脑,与三星 DeX 度过一周主作者少数派会员了解详情 >关注PostMeridy少数派作者少数派作者 手机不能失去无线充电,就像西方不能失去耶路撒冷 PostMeridy关注PostMeridy少数派作者少数派作者 手机不能失去无线充电,就像西方不能失去耶路撒冷 联合作者少数派会员了解详情 >关注PostMeridy少数派作者少数派作者 手机不能失去无线充电,就像西方不能失去耶路撒冷 PostMeridy关注PostMeridy少数派作者少数派作者 手机不能失去无线充电,就像西方不能失去耶路撒冷 2022 年 04 月 05 日 随着折叠屏的技术发展,「如何让手机获得新的使用形式」又变成了一个热闹的话题。其中一类折叠屏设备通过将手机尺寸变大来贴近我们熟悉的平板电脑,两者高度同源性,产品形态上更加具未来感的同时,交互方式和软件开发有明确的道路可循。The Brief History - and Uncertain Future - of Foldable Phones|Wired但「手机加平板」这个组合,它最适合的便携出行场景也并非是人们的唯一需求。从原理上来说,手机只是一个自带了交互媒介的算力单元,如果能将算力单元和不同的媒介组合起来,进一步满足不同场景下的使用需求自然更好。大家所熟悉的台式电脑算是最符合这一组合理念、但又最不具备便携性的一种形态。而在「把手机变成电脑」这条路径上,厂商们的尝试则几乎可以追溯到移动通信设备走向智能化、网络化的初期了,近两年「折叠屏」门类的出现,也又一次让「手机桌面化」这件事再一次被人们关注起来。相较于小米由 MIX Fold 独占且小问题不断的桌面模式、后继无人的坚果 R2 与 TNT 2.0、创业未半而中道崩殂的雷蛇 Project Linda,我们会惊喜的发现这一小块冷清的细分市场中仍然坚持着一位活跃的玩家——三星。三星 DeX 的产品形态本身亦非首创,但它却是现阶段我们能够用上的、为数不多的移动设备桌面化体验之一。在这篇文章中,我合上电脑选择与三星 DeX 共度一周,希望能为还不熟悉这一功能的读者朋友带来一些实际体验上的参考。注:本文旨在关注三星手机上的 DeX 模式(以下简称 DeX )的日常使用情况与国内外各类常用软件的适配程度,所有体验基于 One UI 4.0 (Android 12)下的国行 S21 生成。当如何连接不再是门槛抛开千奇百怪的第三方软件不谈,三星 DeX 本身的完成度与功能的可靠程度都是称得上达标的。如果将 DeX 粗略理解为一套专门为电脑屏幕尺寸优化过的桌面启动器,你就可以了解到 DeX 的实际定义究竟是什么:一套允许用户通过蓝牙、OTG 外设,借助有线或无线投屏,以近似桌面端的形式使用手机软件的子系统。Samsung Galaxy Note20 Ultra Review: The only thing it doesn't do is fold|YouTube比较难能可贵的一点是,三星 2017 年推出 DeX 功能之后没有半途而废,而是在一次次随 Galaxy S 与 Note 系列旗舰的更新中不断为它加入一些功能。经过三年时间的进化,如今要将 DeX 布置起来已经是一件相当轻松的事情。相比于 2017 年的初代产品,你不再需要一块巨大的专用底座连接手机,一根支持相应规格视频信号输出的线缆即可:从手机转接至 HDMI 或者 DP、通过 USB-C 直连同时为手机充电、甚至直接通过无线局域网串流到智能电视……启动 DeX 需要几步?两步:插入、插入与此同时,手机本身的硬件特性,也让 DeX 拥有了可以完全脱离键鼠的操作模式。连接显示器启动 DeX 模式后,你的手机屏幕也可以变成一块相当灵敏的触控板,足够你完成一些基本的点击、滑动操作,并且仍然可以通过屏幕虚拟键盘完成文字输入。右侧按钮从上至下依次为旋转触控板方向、操作指南与退出触控板模式要是你愿意深入挖掘一下 DeX 的能力,或者在手机上做一些比串流看电影更复杂的工作,最好的方式依然是通过蓝牙或者扩展坞连接键盘和鼠标,彻底将 DeX 模式下的手机变成一台即插即用的「小电脑」——这时你还可以关掉屏幕触控板、恢复手机屏幕的显示,从而获得一个基础的双屏配置。有待优化的性能表现虽然我曾极为严厉地批评过荣耀 X30 Max 那块「大而无当」的屏幕,但绝对的屏幕尺寸在分屏、小窗这类使用场景中,还是有不可忽视的优势的。不得不承认,悬浮窗口并不能算是一种很好的观看体验不过 Android 上的分屏与小窗,至今仍然挣扎在「能用」和「可用」之间,距离「好用」还有些距离。对于这样的现状,通过折叠屏幕直接增大面积是一种解决方案,为手机赋予一套新的显示与交互方式则是另一种——三星 DeX 属于后者。尽管后台运行的软件数量实际上主要受手机内存限制,三星 DeX 的桌面依然将同时运行的窗口限制在了 5 个。超过这个数量之后,DeX 就会按照窗口打开的顺序从旧到新依次关闭进程。尽管我们可以在 Good Lock 的 MultiSatr 插件里关掉这个限制,但这样操作的确会影响到 DeX 的实际性能表现。另外,虽然 DeX 吸收了 Windows 中「将窗口吸附到屏幕侧面或顶部以分屏或最大化」这一便捷的窗口操作逻辑,但它的窗口控制逻辑却与 macOS 有几分相似。其中最具代表性的便是,窗口右上角的关闭按钮并不会让我们退出当前软件,而是关闭当前的软件窗口。如果要彻底退出程序,我们仍然需要进入多任务页面在那里点击关闭——与三星当年繁琐的锁定后台操作步骤有几分神似。顶部功能按钮从左到右依次为调整窗口透明度、将窗口固定在前台、最小化、全屏、关闭窗口在 DeX 模式下,我们更是需要及时清理后台任务。即便在 Galaxy S21 的骁龙 888、8GB 内存组合下,在 UFO Test 中显示窗口刷新率为 60 赫兹时,页面滚动与窗口拖拽等操作的观感仍然没有一般的电脑顺畅。光标移动并不如刷新率所显示的那样顺滑三星 DeX 在处理一些高负载网页任务,比如使用了很多功能模块的飞书在线文档或一些同屏弹幕非常多的视频时,鼠标操作也会有比较明显的顿挫感,也更容易导致其他后台软件的缓存被清理进而出现热重启。而在通过 DeX 使用已安装的程序的时候,我则得到了与 Chrome 截然不同的性能表现,也算是从侧面印证了 DeX 在重负载网页中的吃力表现,大概率还是与浏览器或网页本身的优化相关。结合骁龙处理器理论性能以及连接 DeX 时的整体机身温度,DeX 在大型网页的处理上应该仍有可优化空间。此时的屏幕帧率会降到大约 20 FPS 左右,移动鼠标已经可以察觉到明显的不跟手不过话说回来,除极个别应用之外,通过 DeX 为那些没有桌面端或者桌面端做得极烂的软件,提供一个堪用的桌面形态,才更像是三星期望在 DeX 中实现的功能。换一个角度来说,这其实也是我们曾经希望 ARM 处理器的 Mac 们所能够达成的愿景之一。系统应用适配还得看三星注:国际版 OneUI 中一些默认应用使用的是谷歌的对应软件,因此将一些谷歌套件包含在系统应用中和国内应用敷衍了事的所谓「老年模式」不同,三星自己的系统应用大多为 DeX 做了到位的桌面模式适配。如果你目前的使用习惯中已经包含了很多三星生态圈内的软件,DeX 将会提供更加自然的桌面体验——与 Apple 类似,三星在平板电脑市场的长足耕耘,也积累了足以反哺 DeX 生态的丰厚经验。图|三星电子电话、联系人与短信既然在 DeX 下手机就是电脑,我们自然也可以在 Android 上像 Apple 那样通过 iCloud 在手机、手表与电脑之间进行电话、短信转接了。无论是打开免提还是连接蓝牙耳机,在 DeX 中所获得的最终体验都接近无缝,在我看来三星也是除了华为之外,第二家将桌面生态与手机生态做得如此无缝的 Android 厂商。唯一恼人的就是,那些运营商的 5G 彩铃广告也会随之而来被投到大屏幕上。相机与相册尽管我日常使用的主要相册软件是 Google Photos,三星相册更多的时候都是整理本地图片之用,但两者在 DeX 模式下体验也不分伯仲,无论是比例各异的窗口还是放大到全屏后的布局调整,都做出了完善的适配,相比单纯使用手机屏幕自然也能带来更好的修图体验。相较于相册的表现优异,三星自带的系统相机在 DeX 中的体验却受到了相当大的限制,使用上比较接近 Z Flip 3 中合盖拍摄时的规则:相机仅保留了单一的默认拍照功能,无法在超广角与长焦之间切换;同时录像会沿用你上一次录像时的格式设置,需要调整也只能断开 DeX、然后回到手机中去设置。因此我建议你关闭屏幕触控板,在手机屏幕上打开相机,此时就与手机上完整的拍照体验别无二致了。DeX 中就只有这一个拍照规格,分辨率 4032*3024文件管理就像之前在 Material You 适配上原地踌躇许久一样,Google 的文件极客对 DeX 同样没有做出什么优化,无论是小窗还是全屏模式,都是将背景控件拉伸进行填充,按钮与列表布局仍然遵从移动端排版。三星的系统文件管理则借鉴了在 Galaxy Tab 上的排版,会根据窗口的长宽比自行切换移动端的列表排版与平板电脑的双栏布局——这也应该是所有软件在桌面模式中进行窗口适配的及格线。日历与文件管理的情况类似,Google 日历对于 DeX 下的宽屏模式更加近似「适配了但是没完全适配」,无论是宽窗口还是全屏模式中,均不会自动展开汉堡菜单中的边栏内容,仍然使用移动端的布局与按钮功能。相比之下,三星日历的适配程度就好上许多,同时可以直接在日历 app 中调节日程内容的显示文字大小,便于在不同的外接屏幕类型下实现统一的观感。系统设置相比于系统文件管理的窗口比例适配, DeX 模式下的系统设置反而显得有些奇怪。三星在 Galaxy Tab 系列中很早就已经采用了对于横向屏幕适配过的双栏布局,但这种布局并没有应用在 DeX 中。换个角度思考,用户在手机上使用 DeX 的时候往往已经是手机设置完成之后,并不需要十分频繁的去进一步调整系统设置——不过尽管如此,既然已经有现成的模板,这样的最终效果就还是显得有些偷懒了。第三方应用优先选择网页版三星和 Google 的自家应用并不能代表 DeX 的完整体验。Windows Phone 的历史教训已经表明,市场中决定产品成败的因素绝对不只是产品本身,第三方软件生态同等重要。在 Android 开发者文档中,Google 早已经为如何将软件显示内容扩展到不同尺寸与比例的屏幕上做了详尽 指导,其中最主要的便是对于不同的内容或按钮类型进行尺寸调整,以显示更多的有效信息。但 Android 的历史问题无法单纯依靠 Google 的设计规范解决,毕竟 Google 所提出的设计规范在国内软件生态中没什么话语权和号召力。因此(国内主流的)第三方应用在 DeX 中的表现——哪怕从最乐观的角度来说——都只能算是「良莠不齐」,个中差生甚至已经躺在「勉强能用」的边缘了。倘若后续 Google 在 Android 12L 中没有祭出某种形式的「铁拳」,我对于国内软件生态未来的多设备普适性依然只能抱以悲观的态度。这种环境同样这也会成为 DeX 在国内使用的最大掣肘。网页浏览DeX 的明显优势之一,就是让在手机上使用桌面端网页的体验提升了许多。目前主流浏览器应用大多已经是跨平台架构了,处理 DeX 使用过程中各种奇怪的窗口比例可以说是小菜一碟。在我的使用过程中,除了 Chrome 偶尔会出现全屏显示移动端页面时仅渲染左上角、需要关闭窗口重新打开才能恢复正常的 bug 外,Firefox、Edge、Opera、Kiwi 这几款浏览器均可以无压力适应 DeX 中自由变换的窗口比例与全屏模式。Chrome 全屏时打开新网页偶尔会出现的 bug其中表现相对比较差的是 Firefox ,在目前的 app 版本下出现了全屏时网页的缩放比例问题,并且不支持常用的「Ctrl + N」创建新标签页与「Ctrl + W」关闭当前标签页快捷键,使用中的顿挫感也比较明显。流媒体音乐与浏览器相比,各类音乐应用对于 DeX 的适配则真正开始泾渭分明起来。Apple Music 和 YT Music 两款在全球市场份额占比较大的流媒体应用,均能在 DeX 模式下提供良好的适配效果。不仅全屏模式下采用了分栏界面布局,还会在窗口模式中根据窗口比例自动切换手机与桌面端布局。Apple Music 更是直接使用了 iPadOS 版本的界面,堪称是 DeX 中使用最顺畅的流媒体音乐软件。SoundCloud 的适配程度就差了一些,或许是自身体量小的缘故。全屏模式下 SoundCloud 只会将背景进行拉伸填充,没有对内容进行分栏。但是即便如此,相比国内常用的两款流媒体音乐软件, SoundCloud 的适配程度依然是领先的:网易云音乐和 QQ 音乐在 DeX 中都有不少显示问题,包括但不限于窗口模式中页面元素或文字重叠、一些按钮贴图的缩放错误以及页面的整体比例失调等等。尽管软件功能没有问题,使用体验依然相当勉强,最适合的使用形式只能是将小窗口调整到手机的比例,降主为客让 DeX 去主动适应软件。移动办公和绝大多数主要面对国内市场的软件类似,飞书的 app 也没有对于宽窗口做什么适配,依然只是将界面元素机械拉伸并填充到全屏。同时 app 内的飞书云文档同样没有什么优化,功能很有限并且还出现了标题文字的缩放比例问题。相比之下,直接使用网页版云文档的体验更好。相同的机械拉伸一样出现在钉钉里,在别处积累的跨平台开发经验并没有在 Android app 中体现出来。更糟糕的是钉钉的网页版目前已经处于一个半荒废的状态,app 不适配导致的体验缺失无法通过全功能的网页端进行弥补,总体使用体验只能算是刚刚及格。腾讯会议对于不同屏幕比例的支持程度则好上很多,体验基本上与 macOS 版本的软件一致,在自由调整窗口比例、放大到全屏后也没有什么界面 UI 中的 bug。唯一需要注意的是在 DeX 模式下的腾讯会议是无法直接共享屏幕的,因为腾讯会议会将 DeX 桌面识别为一块「分屏模式」中的窗口。除非关闭虚拟触控版,在手机上打开腾讯会议后才能分享屏幕。但是除此之外,腾讯会议的各种摄像头与麦克风的调用、智能背景之类的功能均可以正常的在 DeX 中使用,属于适配程度相对较好的梯队。生活便利淘宝 app 在 DeX 中体验一般,无论是 Play Store 还是三星应用商店中的版本。尽管各项主要功能都是正常的,可以直接下单、也支持鼠标滚轮翻页,但在一部分窗口比例下会出现界面按钮错位的情况——与飞书类似,在 DeX 中直接使用网页版淘宝反而更方便一些。比起支付宝,美团在 DeX 中的体验就有些难以言表,可以说是除了缩放比例之外没有做任何的适配。除非将小窗口调整成手机的显示比例,否则迎接你的就是无穷无尽的机械拉伸,仅仅能保证基本功能的正常使用。支付宝的情况与淘宝类似,毕竟同是阿里系的软件,在手机比例的窗口之外也都是单纯的拉伸。比较奇妙的是,支付宝首页中的一些功能板块其实是做出了双栏目的布局的,但是无法根据窗口比例进一步调整栏目的数量和宽度,仿佛 feature 没有写完一样。得益于三星为指纹认证所提供的 API 与软件自身的支持程度,哪怕界面被拉伸的如同 wide putin 一样,你仍然可以在 DeX 内使用指纹付款的,能否调用取决于该软件是否支持三星手机的指纹认证。因此无论是支付宝还是 Play 商店都可以正常拉起支付界面并完成支付,手机淘宝则会根据软件版本跳转支付或者调用网页版收银台。内容消费作为几乎彻底放弃 web 端转向移动端的典范,我对于新浪微博在 DeX 中的表现自测试伊始就没有抱太大的希望。结果也的确如我所预料:无论是微博、微博国际版,还是借由微博接口开发的第三方客户端(此处以 See 为例),都只在最基本的手机比例小窗口中实现了正常的界面布局,一旦将窗口拉宽或者以全屏打开,你就会感受到真正的图片「扑面而来、呼之欲出」的感觉:从左到右依次为 See 、微博国际版、微博微博 app 的博文发布界面Twitter 与 Instagram 的 app 本身对于 DeX 的适配程度亦不算优秀,其中 Twitter 只会在不同的窗口比例下做机械拉伸,Instagram 则直接不允许你调整窗口的比例,哪怕点击全屏也只是将屏幕上下铺满、以一种相当暴力的方式解决了窗口比例导致图片缩放错误的问题。机械缩放的 Twitter 与锁定窗口长宽比的 Instagram然而尽管如此,以上两者的体验都是数倍优于新浪微博的——原因很简单: Twitter 与 Instagram 拥有全功能的网页端,app 本身不好用的时候可以随时切换到浏览器使用。Twitter 的 web 端与 app 端至于哔哩哔哩的体验,尽管其适配程度好于微博,但是程序本身会识别到 DeX 作为一个分屏界面,导致无法直接从小窗口进入全屏视频,只能先将 app 全屏显示、再进入视频全屏播放。而哔哩哔哩 HD 更是在启动界面就出现了缩放的 bug,在手机上和 DeX 中都不好用。结合哔哩哔哩 app 中越来越多的各类乱糟糟的功能,在同样全功能的网页端触手可及的情况下,网页 B 站仍然是最适合 DeX 的那个。三星软件商店版本的哔哩哔哩 app在同行的衬托下, YouTube 在 DeX 模式中的表现反而是最接近完美适配的。视频内容可以直接放大至全屏,或者根据窗口的比例和形态自动切换移动端与桌面端的排版,与网页体验保持了很高的一致性。比较可惜的是由于 Android 自身的前台判定逻辑,在 DeX 中无法实现电脑上将浏览器最小化、实现非 Premium 帐号后台播放。即时通信即时通讯类软件作为目前手机功能的绝对重点之一,它们的适配程度几乎可以从根本上决定 DeX 最终可以获得的用户广度。幸运的是,针对大尺寸屏幕与折叠屏设备做出针对性优化的 Android 12L 或多或少展示了 Google 未来对于这方面的认可,待到相关开发规范推出之后,DeX 应该也会从中获利,得到更多软件主动进行适配的机会。但是那个未来还没有来。对比目前国内外数个主流的即时通讯类软件,我们大致可以将它们的适配程度分为两类:主动适配程度很高,用户使用习惯可以近乎无缝的在手机端与 DeX 之间衔接以及仅仅做了最基本的适配,只能保证使用时的界面不出错,既没有内容分栏也没有快捷键与手势方面的功能我们目前使用很多的 QQ (与 TIM )属于后者。同样与阿里系软件类似,QQ 与 TIM 都只针对界面的缩放做出了调整,即便有着 iPadOS 客户端的开发经验以及比如 QQ HD 之类的现成模板,两者填满屏幕的方式依然是简单的拉伸、填充,除了内置的照片编辑器因为识别 DeX 为分屏而无法打开之外,其他各项关键功能都可以正常使用,并且没有出现 UI 元素的互相覆盖和文字切割之类的 bug 。而此刻海外市场的表现也并没有特别出色, Facebook Messenger 与 WhatsApp 作为全球聊天软件用户占有率的前两名,开发规范却显著落后。和 QQ 类似,Messenger 与 WhatsApp 都没有做出 DeX 中的内容分栏,只通过单纯的内容放大来填满屏幕。左为 WhatsApp ,右为 Facebook Messenger与前面的例子相比,适配程度达到了第一梯队 Discord 的方式则有些巧妙。尽管乍看上去无论是在窗口模式还是全屏模式中, Discord 都是简单的界面拉伸以填充,但是它将侧边栏和底部分页藏在了一个双指的横向滑动背后,并且是在任何窗口比例下都可以呼出的,动画的流畅与自然程度都相当令人满意,是为数不多 DeX 与桌面端软件体验相近的例子之一。房间里的大象:微信阅读至此,你可能已经发现前面列举的所有测试对象中都缺少了一款大家已经无比熟悉的软件——微信。将微信保留到最后,并非因为它做出了多么重磅的适配——恰恰相反,微信在 DeX 中的使用体验差到令人发指,我可以毫不犹豫的将结论抛在前面:微信就是三星 DeX 在国内普及的最大绊脚石。在前面几乎每一款软件的测试结论中,我都会强调一个功能点,那就是「缩放正确」,也就是软件可以根据显示设备的规格调整内容,避免显示结果过大或者过小。上述所有软件中,哪怕是适配比较差的那些——比如微博和美团——起码都保证了文字的显示尺寸正确。唯有微信、只有微信,无论是三星应用商店还是 Play 商店中的版本,连界面内所显示的文字缩放比例都是错误的:微信对于 DeX 的抗拒也是从软件的启动时便开始的。除了比如 1Password 这样因为安全原因无法在 DeX 中打开的软件之外,微信还是唯一一个在软件的启动阶段就碰到 bug 的样本。无论是从菜单栏还是应用抽屉中打开微信,启动画面都只会显示几秒钟,然后整个窗口直接关闭。起初我还以为微信根本无法在 DeX 里面运行,再尝试的时候才发现这只是窗口的闪退,微信本身还是可以启动的——再点击一下微信的图标,你就会看到上面那个让人血压飙升的窗口。万幸的是微信的各项功能至少都可以正常运行,无论是小程序还是发红包,并且多亏了三星的接口支持,微信也可以直接在 DeX 模式内调用手机的指纹支付。令人不解的是,企业微信——同样是三星应用商店与 Play 商店两个版本下的缩放比例都是正常的,至少是其他腾讯系软件的平均表现。不过至少这个时候我们还有不离不弃的 Chrome ——在目前的版本中,退出屏幕触控版后以「自己扫自己」的方式登陆网页版微信还是可行的。除此之外,微信在 DeX 模式下最多只能算是勉强可用的状态。DeX 的困境虽然标题是「与三星 DeX 度过一周」,从我在 S21 上第一次体验到 DeX 模式到整篇文章的完成,实际上已经过去了差不多一个月。在这期间我断断续续的使用着 DeX ,既作为偶尔投屏看电影的娱乐设备,也试着在上面编辑过三四千字的稿子。平心而论,国内软件对于 DeX 的适配程度还是稍稍超出了我的预期,并且 DeX 允许自由调整窗口尺寸的特性也让那些坚持不兼容的软件有了一个至少可以使用的底线。尽管如此,以目前软件与硬件两方面的综合表现来看,DeX 距离真正发展壮大仍然有相当的距离。这其中最大的问题——比如微信所体现出来的——就是缺乏一套更成熟的软件体系。说来也巧,就在我开始逐个测试软件、准备整理成文的那几天,我一直很喜欢的油管主 MrMobile 也上传了一部关于三星 DeX 的视频,唯一不同的是他所关注的更多是三星手机加上 DeX 能否成为现在笔记本电脑的一个替代品,而我在尝试探索把 DeX 模式下的三星手机当成一台轻量化的小主机使用。尽管立意不尽相同,我们从使用中得到的最终结论却依然是一致的:无论是取代笔记本还是成为可拆卸的主机,DeX 都已经展示出了足够的潜力。它与成为超级成功的产品之间的唯一阻碍,就是其它的软硬件厂商是否希望 DeX 最终走向成功。与此同时,对于我们这些国内用户来说,在这样一个分崩离析、各自为政且一家独大的软件生态中, DeX 的更是缺点被成倍放大了。缺少来自 Google 的有力规范,我对于未来软件厂商的适配积极性抱有悲观的态度;再加上譬如微信这种「电子垃圾」的横行霸道,哪怕我个人非常喜欢 DeX 背后的概念,也不得不忍痛割爱、在结束这段时间的体验之后将它束之高阁,仅仅当作投屏看电影和翻阅照片的备用桌面。> 下载 少数派 2.0 客户端、关注 少数派公众号,解锁全新阅读体验 > 实用、好用的 正版软件,少数派为你呈现 5853扫码分享 本文责编:@克莱德© 本文著作权归作者所有,并授权少数派独家使用,未经少数派许可,不得转载使用。 #热门文章
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Set up and use Samsung DeX on your Galaxy phone or tablet
Set up and use Samsung DeX on your Galaxy phone or tablet
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Set up and use Samsung DeX on your Galaxy phone or tablet
Are you tired of squinting to get a better look at images? When you want to see every detail of an image or video, use Samsung DeX. It lets you connect your phone or tablet to a monitor or TV for a larger and clearer view in desktop mode. It's also perfect for multitasking or using productivity apps, such as PowerPoint, that are easier to use on a big screen. You just need to set it up with a compatible DeX accessory. Some phones can even launch DeX wirelessly as well.
Note: Available screens and settings may vary by wireless service provider and software version. Support for Samsung DeX for Mac OS ended as of January 2022. You can still use Samsung DeX if it's already installed, but there will be no customer support or updates, and you won't be able to download DeX for Mac OS.
DeX compatibility
With so many devices, it can be difficult to keep track of what is compatible with DeX. You can find the latest DeX compatible Galaxy phones and tablets, Samsung smart TVs and monitors, and even USB cables, and keyboards and mouse on Samsung.com.
You can refer to the list below when connecting to DeX.
DeX Pad and DeX Station
Galaxy S Phones: S8 series, S9 series, S10 series, S20 series, S21 series, S22 series, S23, and S24 series.
Galaxy Note phones: Note8, Note9, Note10 series, Note 20 series.
DeX cable or HDMI cable
Using a DeX cable or other compatible HDMI cable, you can connect to any TV or Monitor with an HDMI port.
Galaxy S Phones: S8 series, S9 series, S10 series, S20 series, S21 series, S22 series, S23, and S24 series.
Galaxy Note phones: Note8, Note9, Note10 series, Note 20 series.
Galaxy foldables: Fold, Z Fold2, Z Fold3, Z Fold4, and Z Fold5.
Galaxy A phones: A90 5G.
Galaxy Tablets: Tab S4, Tab S5e, Tab Active Pro, Tab S6, Tab S7 series, Tab S8 series, Tab S9 series, Tab Active 3.
Note: The Tab S9 FE is not compatible with HDMI output.
Wireless DeX with a TV or Monitor
You can use Wireless Dex with 2018 and later Samsung TVs, Samsung Smart Monitors, and any other device that supports Miracast screen mirroring.
Galaxy S Phones: S9 series, S10 series, S20 series, S21 series, S22 series, S23, and S24 series.
Galaxy Note phones: Note9, Note10 series, Note 20 series.
Galaxy foldables: Fold, Z Fold2, Z Fold3, Z Fold4, and Z Fold5.
Galaxy A phones: A90 5G.
Galaxy Tablets: Tab S5e, Tab S6, Tab S7 series, Tab S8 series, Tab S9 series, Tab Active 3.
Note: The Galaxy Tab S9 is not compatible with Wireless DeX.
DeX on PC
DeX on PC works with Windows 10 and Windows 11 PCs using just a USB cable, or wirelessly.
Galaxy S Phones: S9 series, S10 series, S20 series, S21 series, S22 series, and S23 series.
Galaxy Note phones: Note9, Note10 series, Note 20 series.
Galaxy foldables: Fold, Z Fold2, Z Fold3, Z Fold4, and Z Fold5.
Galaxy A phones: A90 5G.
Use a DeX Pad or Station with your phone
Note: Because of their size, some phones and tablets will not fit in the Pad or Station. Use a DeX cable with these devices instead.
You can ace that research project by using a DeX Pad or a DeX Station. Both products are docking stations that your phone can sit in. With a DeX Pad your phone will lie flat, and with a DeX Station it will be propped upright. The great thing about a DeX Pad or DeX Station is that you can connect wired accessories directly to it, such as a wired keyboard. You can also use Bluetooth accessories if desired. Please see the "Use DeX with a keyboard and mouse" section for more details.
To set it up, connect the DeX Pad or Station to the charging adapter that came with the phone.
Connect one end of an HDMI cable to the HDMI port, and then connect the other end into the monitor's HDMI port.
If your phone has a case on it, make sure you take it off before connecting because it may cause connection issues. Then, connect your phone to the DeX Pad or Station.
If needed, unlock your phone. If it's your first time using DeX, a popup message will display on your phone's Home screen. Tap Continue, and then tap Start to allow access to Full Desktop mode. Another Samsung DeX popup will appear - tap OK.
Then, swipe down from the top of the screen to open the Notification panel. Tap the notification that says "Use your phone as a touchpad.” Now you can control the monitor's cursor using your phone! Read the instructions on the monitor, and then select OK.
Note: You can perform basic operations using the touchpad connected to your PC, but some gestures, such as pinching with two fingers to zoom in, won’t work.
On some phones, your monitor will automatically start screen mirroring whatever is on your phone. To switch to Samsung DeX, open the Notification panel by swiping down from the top of the screen. Tap the Samsung DeX notification, and then tap Samsung DeX. The monitor will switch to Samsung DeX mode.
To exit DeX, select the Apps icon in the bottom left corner of the DeX screen, and then select Exit DeX.
Use a DeX cable or HDMI cable
Note: You can also use a standard USB-C to HDMI adapter to start DeX.
A DeX cable or HDMI cable lets you connect your phone or tablet directly to a monitor or TV without the use of any other accessories. Use the steps below to set up DeX:
Connect the USB-C end of the DeX cable or HDMI cable to the port on the phone or tablet, and then connect the other end into the TV's or monitor's HDMI port.
Note: Keep in mind that DeX will restart if you remove or unplug the HDMI cable. Please remember to save all changes before unplugging the cable.
If needed, unlock your phone or tablet. If it's your first time using DeX, a popup message will display on your phone or tablet's Home screen. Tap Continue, and then tap Start to allow access to Full Desktop mode.
Next, another Samsung DeX popup will appear on the phone or tablet - tap OK, and then swipe down from the top of the screen to open the Notification panel. Tap the notification that says "Use your phone as a touchpad.” Now you can navigate the TV or monitor using your device!
Note: You can perform basic operations using the touchpad connected to your PC, but some gestures, such as pinching with two fingers to zoom in, won’t work.
Read the instructions on the TV or monitor, and then select OK.
To scroll in windows in DeX mode, touch and hold the touchpad, and then drag the pointer up or down.
With some devices, your TV or monitor will automatically start screen mirroring whatever is on your device. To switch to Samsung DeX, open the Notification panel by swiping down from the top of the screen. Tap the Samsung DeX notification, and then tap Samsung DeX. The TV or monitor will switch to Samsung DeX mode.
To exit DeX, select the Apps icon in the bottom left corner of the DeX screen, and then select Exit DeX.
Use DeX for PC
Note: This feature is not available on Galaxy tablets. USB tethering cannot be used with Samsung DeX.
The new DeX for PC app is similar to the regular DeX mode, but it has some other features thrown in, and you don't need to buy a separate DeX accessory; you can use the USB charging cable that came with your phone. You can also find the USB cable on our the Samsung Shop.
First, you'll need to download the DeX for PC app. On your computer, go to the Samsung DeX website, and then download the version you need.
Next, navigate to and open the download file, and use the on-screen prompts to complete the setup process.
When the software is set up, open the Samsung DeX app on your computer.
Then, connect your compatible device to the computer using a USB-C cable. If your computer doesn't have this connection, you can use a USB-C to USB-A cable.
Wait a few seconds for the phone to connect; when it does, a DeX window will appear on your monitor. Use your computer's mouse to control things on your connected phone, such as opening the phone's app.
Note: You can perform basic operations using the touchpad connected to your PC, but some gestures, such as pinching with two fingers to zoom in, won’t work.
To exit DeX, select the Apps icon in the bottom left corner of the DeX screen, and then select Exit DeX.
Here is a list of the cool things you can do only with DeX for PC:
Click and drag a file from your PC to the Samsung DeX window to transfer a PC file to your mobile device. Copied images will appear in your phone's Gallery app. However, you'll need to make sure your device's USB settings are set to Transferring files.
Text your contacts from your PC. You can copy and paste text from the phone to PC and vice versa.
Simultaneously run up to 5 apps from your mobile device on the computer. Compatible apps on your PC will be resized for a desktop experience.
Use DeX on a tablet with no external display
Note: Not all tablets are compatible with DeX.
The Tab S4, S6, S7, S8, S9, and A9+ have DeX built right into them. In other words, you can multitask with DeX without connecting the tablet to a monitor! If you’re looking for the latest Galaxy tablet to use DeX check out our website.
Just swipe down from the top of the screen to open the Quick settings panel. Then, tap the Samsung DeX icon. If it's your first time using this feature, follow the instructions.
The DeX interface will load on the tablet the same way it appears on desktops and monitors. You can navigate it using the touch screen, S Pen, a USB or Bluetooth mouse and keyboard, or a Keyboard cover.
To exit DeX, select the Apps icon in the bottom left corner of the DeX screen, and then select Exit DeX.
Using the S Pen
If you have a Tab S7, S8, or S9, DeX mode will have an extra perk: you can use S Pen features! That’s right, DeX mode will come with the Air command menu. Just hover your S Pen over the Air command icon and tap it to open up the menu. All of your usual shortcuts will be there.
You can also use the S Pen to write down ideas in Samsung Notes, color in the PENUP app, and do a myriad of other things that are easier with a pen.
If you need a new S Pen for your tablet, you can find a compatible pen specific to your model on our website.
Use DeX wirelessly with a TV or monitor
Note: Wireless DeX is supported on Samsung 2018 TVs or newer, and on Smart TVs that support Miracast technology. Some 2018 TVs may get better results using an HDMI cable. Only newer Galaxy devices, such as the the S22, or S23 can connect with DeX wirelessly.
On compatible phones and tablets with the One UI 3.1 update, you can use DeX on your Smart TV or Smart Monitor! The best part is there are no cables or DeX accessories required. You can even operate up to 5 apps at once on your TV when using DeX mode. If you’re looking for the newest Samsung smart TV or Smart monitor check out our website.
On your compatible device, swipe down from the top of the screen to open the Quick settings panel, and then tap the DeX icon.
Tap DeX on TV or monitor, then select your TV or monitor from the list, and then tap Start now.
Your TV or monitor may prompt you to allow the connection; select Allow. Read the information on your phone or tablet and tap Start if needed. You can now use DeX mode on your TV or monitor!
To use your phone or tablet as a touchpad, swipe down from the top of the screen and select the touchpad notification. On some devices, you may need to tap the Touchpad icon (it look like a small box) in the lower left corner of your screen.
When connecting to a monitor, there are a few extra things you can do. On your device, double tap the Rotate icon to change the touchpad’s orientation. Or, double tap the Touchpad gesture icon (it looks like an exclamation mark) for helpful hints on how to use the touchpad.
The following tips will help you when connecting to a TV or monitor:
For a smooth wireless connection, it is recommended that you use your phone or tablet and TV or monitor within a short distance of each other. This will prevent stuttering and lagging.
Remote access to DeX directly from a Samsung TV may not work well if your phone’s screen is turned off. You can try turning on your phone's screen and then connecting again.
You can perform basic operations using the touchpad connected to your PC, but some gestures, such as pinching with two fingers to zoom in, won’t work.
Touchscreen displays are not supported when using DeX.
To exit DeX, select the Apps icon in the bottom left corner of the DeX screen, and then select Exit DeX.
Use DeX with a keyboard and mouse
Depending on the type of device you're connecting to when using DeX, you may want to add a keyboard and mouse! This will make it even easier to navigate the DeX screen. You can use a wired or wireless USB keyboard and mouse, or pair a keyboard and mouse using Bluetooth. Of course, if you are using DeX on PC, you can just use the keyboard and mouse connected to your computer. Keyboards and mouse are available on our website.
For a wired or wireless USB keyboard and mouse, plug the USB cable or transmitter into the USB port on the DeX Pad or Station, or the USB port on your mobile device. You may need an OTG adapter to plug a USB-A device into the USB-C port.
For a Bluetooth keyboard or mouse, use your phone or tablet to open Settings, then tap Connections, and then tap Bluetooth. Make sure your keyboard or mouse is in pairing mode, and then select the desired device under Available devices. Tap Pair when prompted.
If you're using a Tab with a compatible Book Cover keyboard, you just have to connect the keyboard to the tablet. You can also have DeX start automatically by enabling Auto start when Book Cover keyboard is connected in Settings.
If you need to change the keyboard's language, open DeX mode, and then navigate to and open Settings. Select General management, and then select Physical keyboard.
Select Samsung Keyboard - English (US). From there, you can choose your preferred language.
DeX settings and troubleshooting
Note: DeX settings can only be accessed in DeX mode. Setting changes made in DeX mode will be reflected in your mobile device settings as well. However, some configurations may not be supported.
Maybe you’re having some trouble reading the text in DeX mode. Just use the Samsung DeX settings to change any settings related to DeX mode.
From DeX mode, open Settings, and then tap Samsung DeX. From here, you can customize your wallpaper, change display settings, access keyboard settings, try new features with Samsung DeX Labs, hide the task bar, and much more.
If you are having trouble using DeX, please check out our DeX guide.
Other answers that might help
Lock and unlock Samsung DeX
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The beginner's guide to Samsung DeX - Samsung Business Insights
The beginner's guide to Samsung DeX - Samsung Business Insights
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The beginner’s guide to Samsung DeX
Published Sep 15, 2023By: Samsung for Business
Samsung DeX ushers in a new era of mobile-powered desktop computing by allowing you to transform your phone or tablet into a PC. The best part? It’s free. The DeX software platform is built into many of the latest Samsung Galaxy mobile devices, so all you need to get started are a monitor, an HDMI adapter and peripherals. And if you have a Smart TV or monitor that supports Miracast, you can even use DeX wirelessly.
If you’re new to DeX, here’s a complete guide to help you understand what it is, how it works and how it can benefit you and your business.
What is Samsung DeX, and what devices does it run on?
Samsung DeX is a software platform that extends your smartphone or tablet into a desktop computing experience. It runs on virtually all of Samsung’s flagship smartphones introduced since 2017, starting with the Galaxy S8 and right up to this year’s Galaxy S23, S23+ and S23 Ultra and the newest flagship foldable, the Galaxy Z Fold5. DeX is also supported on selected Samsung’s Galaxy tablets, including the Tab S9 and the rugged Tab Active4 Pro. With larger tablets, DeX can be used directly on-screen with a keyboard case, as well as on a connected monitor with an external keyboard and mouse.
The first iteration of Samsung DeX, launched in early 2017, required a docking accessory (DeX Station or DeX Pad) to power the software and connect the peripherals. With the launch of the Note9 in August 2018, Samsung eliminated the need for these docking accessories with the introduction of the DeX HDMI adapter, cable and multiport adapter.
Once connected to a monitor by one of these adapters, the Samsung DeX platform boots up quickly, presenting you with a familiar desktop experience — complete with resizable windows, drag-and-drop functionality and the same keyboard shortcuts.
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With the launch of the Note20, Samsung introduced wireless DeX, which allows DeX to be used without a cable on Smart TVs featuring Miracast, as long as both devices are connected to the same Wi-Fi network.
In this beginner’s guide, we’ll provide plenty more tips for navigating the DeX interface. But first, here’s are the pros and cons of the official DeX accessories:
Which DeX adapter is best?
Samsung offers several accessories and cables that can be used for Samsung DeX and Samsung DeX on PC. Each cable and adapter offers different advantages depending on where and how you use the platform. The DeX cable allows you to easily connect your device to a standard HDMI port on your monitor. It’s 1.4 meters long, so you have the flexibility to work with just about any monitor setup. The DeX cable is ideal if you plan to use DeX primarily in one location and can leave the cable connected to your monitor. It’s often used in corporate hot-desking scenarios, where users drop by, connect their phone to the cable and get to work. Since there are no additional ports to connect a USB keyboard and mouse, you’ll instead need to use Bluetooth peripherals. For longer DeX work sessions, use wireless charging to keep your battery full.
With a full range of ports, the DeX multiport adapter offers the most flexibility in using DeX. In addition to the HDMI port to connect to your monitor’s HDMI cable, you have a USB 3.0 port to connect a keyboard or mouse, as well as a USB-C port to connect your phone’s charging cable. The multiport adapter is compact and easily pocketable.
A USB-C to USB-C cable is a great option if you have a USB-C monitor. One end connects to your device and the other connects directly to the monitor. The other advantage of USB-C cables and monitors is that your monitor can act as a hub to connect your wired keyboard and mouse. It can also keep your device charged while you’re in DeX mode. You can also use a USB-C to USB-C cable for DeX on PC if you have a newer laptop with USB-C ports.
The other option for wired DeX on PC is a regular USB-C to USB-A charging cable. You likely already have one for charging your device. Just detach the USB cable from the wall charger and connect it to the USB port on your PC or Mac.
In addition to these adapters, Samsung has also introduced a Smart Keyboard especially for DeX. The Bluetooth keyboard has a dedicated key to instantly launch DeX, as well as function keys for easily switching connectivity between your Galaxy smartphone, tablet and PC.
How to set up your workstation for Samsung DeX
Once you have your preferred cable or adapter, follow these steps to connect your Galaxy mobile device or tablet to your monitor and start using DeX:
If you’re using the DeX cable, plug it into your monitor’s HDMI port. If you’re using a multiport adapter, you can just connect a standard HDMI cable from your monitor into the adapter.
Connect your device to the adapter by way of its USB-C port. You will see the Samsung DeX logo appear on your monitor when it boots up.
Now connect your keyboard and mouse. If you’re using the DeX cable, you’ll be pairing a Bluetooth keyboard and mouse. On your device, turn on Bluetooth and scan for peripherals. Then follow the manufacturer’s instructions (which often involve holding down a Bluetooth button to make your keyboard or mouse “visible” to your phone or tablet). If you’re using the multiport adapter, you have the option of connecting via USB 3.0. You can also choose to use your device as a touchpad instead of connecting a mouse; read more on that below, in the “Tips for getting started with Samsung DeX” section.
If you’re using the multiport adapter, you can also connect your device’s charging cable to the adapter’s USB-C port. If you’re using the DeX cable, you can keep your device charged by placing it on a wireless charger while you’re using DeX.
Using DeX wirelessly on your smart TV or monitor
With the latest Galaxy devices, including Galaxy Z Fold5, Galaxy S23 and Tab S9, Samsung has introduced the ability to use DeX wirelessly.
Wireless DeX works on most Smart TVs that support Miracast, though Samsung Smart TVs released in 2019 or after provide the best experience. Samsung launched a lineup of Smart Monitors featuring Miracast, which are ideal for creating a wireless DeX workstation. The Smart Monitor line includes 24-inch, 27-inch and 32-inch displays.
To use wireless DeX, first go into screen mirroring mode on your TV or monitor. Then, on your phone or tablet, pull down the Quick Settings and tap DeX. Now select the TV or monitor you want to cast to.
Wireless DeX on TV is a true second-screen experience — for example, you can keep using your phone as a phone while it powers the DeX interface on your TV. It’s ideal for sharing content like PowerPoint presentations or videos, but you can also connect a keyboard and mouse and use the TV as a monitor to work productively.
Wireless DeX is now available on most Samsung flagship devices, depending on which Android OS update your device is using.
Tips for getting started with Samsung DeX
Adjusting your display settings: When you first boot up DeX, you’ll be prompted to check that the desktop is displaying correctly on your connected monitor or TV. If the corners of the DeX desktop don’t fit properly within the display, you’ll need to go into the settings menu of your monitor or TV to adjust the scaling. This is particularly common on TVs that have the picture set to a certain aspect ratio. Select the “Fit to Screen” option and you should be all set.
Screen mirroring versus DeX mode: After connecting to your monitor, you’ll see several new options in your device’s notifications menu, including the option to move between screen mirroring and DeX mode. As its name indicates, screen mirroring simply mirrors your device screen on the connected monitor. Screen mirroring is useful in some circumstances, but DeX offers a much different, completely optimized desktop computing experience for productive work on a larger screen. Tap the notification to go into DeX mode.
Use your phone or tablet as a touchpad: Once you are connected to an external display with DeX running, you’ll see a touchpad icon at the bottom left of your mobile device’s screen. After selecting this, you’ll be able to use your finger or an S Pen to navigate within DeX. This setting is particularly useful if you don’t have a Bluetooth mouse handy and want to open an app, PowerPoint or video, especially if you’re using DeX during a presentation. When you’re using DeX from a tablet, you can also use your tablet’s screen as a graphics pad for sketching.
Launch and maximize your mobile apps: All of Samsung’s core apps are optimized for DeX, so you can resize and maximize them as needed. You can also use right-click functionality and keyboard shortcuts. Dozens of third-party apps are also fully optimized for DeX, including the Microsoft Office suite, Adobe Acrobat Reader, Lightroom, Photoshop Sketch, Gmail, Chrome, BlueJeans, GoToMeeting and all the leading virtual desktop infrastructure (VDI) clients, to name a few. For apps that aren’t optimized for DeX, consult the next tip.
Activate DeX Labs: DeX Labs offers access to “experimental” features that aren’t officially supported. Two current features include allowing DeX to force-resize apps and auto-open the last used app. To activate these features, click the App tray icon in the bottom right of your screen, open DeX Labs and toggle the features on. Now, when you open an app that isn’t DeX-optimized, you’ll be able to view it in a larger window or fully maximized. Opting to auto-open the last used app makes using DeX even more seamless, giving you more continuity between your mobile device and DeX.
Getting to know the DeX interface
Samsung DeX has an intuitive user interface, with a quick learning curve for most Galaxy phone or tablet users. Even so, here are a few tips to help you get familiar with the setup:
Apps tray: At the bottom of your screen on the far left is the Apps tray icon (the grid with nine dots). Click on it and you’ll find all your apps arranged just as you see them on your device. You can browse between screens or use the search bar to find exactly what you’re looking for.
Lock or exit DeX: When you tap the App tray icon, you’ll also see a menu with several other options. You can lock DeX, in case you need to leave your desk for a moment. You can also exit DeX mode here or switch to screen mirroring.
Recent, home and back: The other three icons in the bar at the bottom-left of your screen will be familiar. They’re the same recent, home and back icons that you’ll see at the bottom of your device’s screen; they provide shortcuts for hopping between apps and returning to your desktop. You can also access your currently opened apps via the shortcuts that appear just to the right of this menu.
Volume and audio output: To the right of the toolbar, you’ll find the volume settings. Click the icon to adjust the volume. You’ll also be given the option to change the audio output. You can have audio play through your device or through the connected display, if it has speakers.
Screenshots: Next on the toolbar is the screenshot tool, which lets you quickly capture your DeX screen and anything you’re viewing.
Notifications menu: You also have easy access to your device’s notifications — signaled by the circled number on the right of the toolbar. Just tap the number to see all your notifications.
Quick Settings menu: At the far right is the Quick Settings menu (the one you normally access by swiping down from the top of your device). Here you can view battery life, Wi-Fi and cellular connectivity, as well as the time and date. Tap any one of these to expand the menu and adjust your settings.
Customizing your DeX home screen: Customizing your DeX home screen works just like it does on your mobile device. Select and drag apps from your Apps tray onto your home screen and position them in any order you like. To change your wallpaper in DeX, tap once with two fingers on your touchpad (or right click on your mouse) to access the customizer menu, then select any image from your Gallery.
For complete access to all of your mobile device’s settings, you can also open the regular Settings app in DeX mode.
What displays work with DeX?
With a wired connection, DeX can work on just about any monitor or TV with an HDMI port. But the supported resolution and aspect ratio will differ depending on the mobile device and adapter used. After connecting to a monitor or TV, open your Settings and click into the DeX menu. Here, you’ll see the display resolutions supported for your setup. You may also need to adjust the settings on your monitor or TV to ensure content doesn’t overlap the edges of your screen, as noted in our “Tips for getting started” above.
As for wireless DeX, most Smart TVs with Miracast will work, but the best experience can be found on Samsung Smart TVs released from 2019 onward. With Samsung’s new Smart Monitor lineup, you can create an entirely wireless DeX workstation.
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Can DeX replace your PC?
Today’s mobile devices, tablets and foldables offer enough computing power to complete most work tasks. But smaller screens can make it difficult to multitask or maximize productivity. Using Samsung DeX with a full-size monitor, keyboard and mouse makes it possible to replace the laptop or desktop PC for good.
For individuals, DeX is a great way to work more flexibly. Instead of booting up your laptop to catch up on work at home, just connect your phone or tablet to a monitor and get straight to work. You can run up to five apps at once and easily complete most tasks without hassle.
For small business owners and IT decision makers, DeX allows you to consolidate your IT investment and device management. By using a smartphone or tablet as their primary computing device, your team members will have instant access to business apps and corporate email — wherever they are. Rather than having a dedicated PC for each employee, you can create flexible workstations outfitted with a DeX cable, Bluetooth keyboard and mouse, allowing users to drop in and start working within seconds.
Even businesses that still rely on legacy Windows apps without mobile or web versions should consider using DeX. You can leverage a virtual desktop app, like VMware, Citrix or Amazon WorkSpaces, to access a full Windows desktop within DeX.
Samsung and VMware recently announced the addition of second screen support for virtualized Windows PC desktop environments running in DeX. The jointly developed capability enables Galaxy Tab S9 series, S23 series, and other flagship Galaxy tablets or mobile devices to display a VMware-virtualized Windows PC environment on a connected monitor while enabling movement of content across screens.
How can DeX benefit my business?
Having one piece of technology that connects everything benefits both your team and your business at large. For your team, it means using a single device, with instant access to all the information they need — without having to navigate multiple platforms or share projects and data from one device to another. It also means individual team members can personalize their device to their needs, which is much more efficient than using multiple devices.
For the small or medium-sized business (SMB), there’s the obvious financial benefit of having to buy fewer PCs and laptops. But beyond those upfront savings, giving employees greater work flexibility also improves efficiency, communication and productivity. In industries like public safety, DeX is even being leveraged in-vehicle to replace rugged laptops that remain bolted into the vehicle. It can also be used to power rugged mobile command centers at an emergency scene.
DeX also comes with security benefits. Samsung smartphones and tablets are protected by advanced biometric security and Samsung Knox. The defense-grade security platform protects devices from the chip up — from the moment they’re powered on — so you can be sure your information is safe. Knox also gives you access to powerful management tools to maintain control of your company devices and enable your own security protocols, including containerization and app allowlisting and blocklisting. Since DeX is powered by the mobile device, it benefits from all these protections. Fewer devices means a reduced attack surface for hackers.
Mobile computing is already transforming productivity across diverse industries, and businesses of all sizes will want to get on board sooner rather than later. Samsung DeX gives you a ready-made solution with reliable security built in.
Unfold next-level productivity for your business with Galaxy Z Fold5 today. And discover more ways Samsung DeX can maximize the computing power you carry around all day.
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Samsung for Business
A global leader in enterprise mobility and information technology, Samsung offers a diverse portfolio of business technologies from smartphones, wearables, tablets and PCs, to digital displays and storage solutions. We are committed to putting the business customer at the core of everything we do, serving diverse industries including education, finance, government, healthcare, hospitality, public safety, retail and transportation. Follow Samsung for Business on Twitter: @SamsungBizUSA
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Awesome deals, Galaxy Book 4 series, Watch 6, S24 Ultra or Z Flip 5! - Get 15% discount on Thinborne cases!
NewsSamsungS SeriesGalaxy S24 UltraGalaxy S24+Galaxy S24Galaxy S23 UltraGalaxy S23Note SeriesGalaxy Note 20 UltraGalaxy Note 20Galaxy Note 10 LiteGalaxy Note 10+Galaxy Note 10A SeriesGalaxy A34 5GGalaxy A54 5GGalaxy A33 5GGalaxy A53 5GGalaxy A73 5GZ Fold SeriesGalaxy Z Flip 5Galaxy Z Flip 6Galaxy Z Fold 6Galaxy Z Fold 5Galaxy Z Fold 4M / F SeriesGalaxy F41Galaxy M51Galaxy M31Galaxy M21Galaxy M11Tab SeriesGalaxy Tab S9Galaxy Tab S9+Galaxy Tab S9 UltraGalaxy Tab S8 UltraGalaxy Tab S8+Wearable SeriesGalaxy RingGalaxy Watch 6Galaxy Watch 5 ProGalaxy Buds Pro 2Galaxy Buds ProALL DEVICES »SoftwareOne UIOne UI 1.1One UI 1.5One UI 2.0One UI 2.1One UI 2.5One UI 3.0One UI 3.1One UI 3.1.1One UI 4.0One UI 4.1One UI 4.1.1One UI 5.0One UI 5.1One UI 5.1.1One UI 6.0One UI 6.1One UI 7.0Samsung DeXSamsung DeX One UI 5.0Samsung DeX One UI 5.1BixbyBixby HomeBixby VoiceBixby VisionBixby RoutinesGalaxy AIExynosExynos 2400Exynos 2200Exynos 2100Exynos 990Exynos 9825Exynos 9820Exynos 9810Exynos 880AndroidAndroid 10Android 11Android 12Android 13Android 14Android 15TVQLED TVQD-OLED TVMicro LED TVQLED vs. QD-OLED vs. Micro LEDReviewsFirmwareDevicesForumJoin Android 15
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Samsung DeX By Mihai Matei Last updated: March 11th, 2023 at 17:08 UTC+01:00 LATEST SAMSUNG DEX NEWSNew Galaxy Tab S9 FE tablets suffer from an odd DeX downgrade[Update] No Samsung DeX support in Galaxy Z Flip 5's short list of upgradesGoogle Pixel 8 could finally bring a healthy rivalry to Samsung DeXSamsung's DeX notebook needs to evolve the platform to be taken seriouslySamsung may be working on a DeX-ChromeOS hybrid notebook powered by ExynosExclusive: Galaxy Z Flip 5 will be smallest Samsung phone to support DeXSamsung DeX needs a better native blue light filter solutionSamsung brings two new mid-range phones and a tablet to BrazilThe Vatican Army adds Samsung Knox Suite into its defense strategyOur Samsung DeX One UI 6.0 wishlist to make the platform greater MORE SAMSUNG DEX NEWS
What is Samsung DeX?
Samsung DeX, short for “Desktop eXperience,” is a tool developed by Samsung and aimed at productivity users who want to turn their smartphones or tablets into workstations. It's available for select Galaxy devices, and as the name implies, it offers a desktop-like experience.
Samsung DeX goes about delivering a desktop environment in several ways. Firstly, DeX allows users to connect Galaxy smartphones and tablets to external monitors and use input devices like keyboards and mice. Granted, these input devices are also supported by Android phones developed by other brands, but Samsung DeX offers more than just compatibility with peripherals and Android screen mirroring to an external monitor.
DeX is a reinterpretation of One UI with desktop users in mind and has several unique features. It draws some inspiration from operating systems such as Microsoft Windows. Therefore, it has a taskbar, desktop shortcuts, a notification center, dedicated mouse and keyboard settings, and a Finder, and it even has window-snapping features similar to Windows OS.
For enterprises, Samsung DeX offers management options through Samsung Knox, allowing network administrators to restrict access to certain features for added security.
Samsung released DeX in 2017, but initially, the software tool required a dedicated accessory called DeX Station. At one point, a couple of years after release, DeX even supported Linux, allowing enthusiasts to use a compatible Linux distro instead of Android OS as its foundation. However, support for this feature ended with the release of Android 10.
Later, Samsung made DeX work without a dedicated DeX Station and also released Wireless DeX along with a DeX for PC Windows app. However, for the best DeX experience, users are recommended to use a compatible HDMI hub to connect smartphones and tablets to external monitors and peripherals, or to use DeX on-device (on Galaxy tablets). Samsung no longer sells official DeX Stations, but many third-party HDMI hubs are compatible with DeX.
Samsung DeX is also available on Galaxy tablets, where it can be enabled as an alternative to standard One UI without requiring an external monitor. Unlike Galaxy smartphones, which always need an external monitor to run DeX, Galaxy tablets can run DeX on-device. The desktop UI pairs perfectly with official accessories such as keyboard covers and can turn Galaxy tablets into laptop replacements.
A Samsung DeX app for Microsoft Windows also exists, allowing users to connect a Galaxy smartphone to a PC via USB and run DeX in Windows OS.
On Galaxy phones and tablets, Samsung DeX can conveniently be enabled or disabled via a dedicated quick toggle.
Samsung DeX gained new features with the One UI 5.0 and One UI 5.1 updates, such as a Finder embedded in the taskbar, a calendar pop-up, a redesigned notifications panel, and improved split-screen and multi-window.
What types of apps can Samsung DeX run?
Although Samsung DeX doesn't look anything like the standard One UI or Android OS, the desktop environment is built on top of Google's mobile operating system, which means it is compatible only with Android apps. There are no DeX-only apps.
The vast majority of Android apps can be launched in Samsung DeX. And most apps can be resized or run in full-screen thanks to Android's adaptive layout feature. The few apps that haven't adhered to Google's adaptive layout will run in a window that cannot be resized.
First-party Samsung apps offer the best DeX experience because their layouts can change drastically to accommodate the desktop environment. Likewise, some of Google's apps, such as the Chrome internet browser, use a more desktop-friendly layout in Samsung DeX by default.
App windows in Samsung DeX can be pinned to remain on top of other apps and even have an opacity slider. Windows can also be snapped to the left or right side of the screen for split-view mode, using DeX keyboard shortcuts or by dragging windows to the edges of the screen using a mouse. And with the release of One UI 5.1, Samsung DeX gained support for corner window snapping, allowing users to switch to a four-app multi-window layout on the fly.
Which devices support Samsung DeX?
Samsung DeX is supported by a wide variety of Galaxy phones and tablets, mostly in the upper-mid-range and high-end segments. This feature is exclusive to Samsung devices.
Devices supporting wired Samsung DeX:
Galaxy S8, Galaxy S9, Galaxy S10, Galaxy S20, Galaxy S21, Galaxy S22, and Galaxy S23 series. Galaxy S21 FE.
Galaxy Note 8, Galaxy Note 9, Galaxy Note 10, Galaxy Note 20 series.
Galaxy A90 5G.
Original Galaxy Fold and the Galaxy Z Fold series
Galaxy Tab S4, Galaxy Tab S6, Galaxy Tab S7, Galaxy Tab S8, Galaxy Tab S5e, Galaxy Tab S6 Lite (after One UI 3.1 update and on-device only), Galaxy Tab Active Pro, Galaxy Tab Active 3.
Devices supporting Samsung Wireless DeX:
Galaxy S9, Galaxy S10, Galaxy S20, Galaxy S21, Galaxy S22, Galaxy S23 series, and Galaxy S21 FE.
Galaxy Note 9, Galaxy Note 10, Galaxy Note 20 series.
Galaxy A90 5G.
Original Galaxy Fold and the Galaxy Z Fold series.
Galaxy Tab S5e, Galaxy Tab S6, Galaxy Tab S7, Galaxy Tab S8 series, and Galaxy Tab Active 3.
Devices supporting Samsung DeX on PC:
Galaxy S9, Galaxy S10, Galaxy S20, Galaxy S21, Galaxy S22, and Galaxy S23 series. Galaxy S21 FE.
Galaxy Note 9, Galaxy Note 10, Galaxy Note 20 series.
Galaxy A90 5G.
Original Galaxy Fold and the Galaxy Z Fold series
Galaxy tablets do not support Samsung DeX on PC.
LATEST SAMSUNG DEX NEWSNew Galaxy Tab S9 FE tablets suffer from an odd DeX downgrade[Update] No Samsung DeX support in Galaxy Z Flip 5's short list of upgradesGoogle Pixel 8 could finally bring a healthy rivalry to Samsung DeXSamsung's DeX notebook needs to evolve the platform to be taken seriouslySamsung may be working on a DeX-ChromeOS hybrid notebook powered by ExynosExclusive: Galaxy Z Flip 5 will be smallest Samsung phone to support DeXSamsung DeX needs a better native blue light filter solutionSamsung brings two new mid-range phones and a tablet to BrazilThe Vatican Army adds Samsung Knox Suite into its defense strategyOur Samsung DeX One UI 6.0 wishlist to make the platform greater MORE SAMSUNG DEX NEWS Load More Home News Samsung DeX
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Samsung DeX is a new user experience that extends the functionality of your Android device to a PC-like environment.
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How Samsung DeX works
Samsung DeX is an extension of Android N’s Multi- Window mode.
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