datasnapandroid

Ⅰ 市面上哪款APP是Delphi寫的呢

企業軟體里有很多。
一般人理解的軟體，可能是面象大眾的那些APP，這些APP里，Delphi開發佔比可能非常少，畢竟Delphi是用框架開發的，APP的體積會大一些，面對大眾的APP，各個細節往往都有要求，所以一般用Java開發android，IOS類同。
但是，更多更廣泛的軟體，其實是各企業的應用軟體，這種軟體只運行在特定場所，與大眾無關，其數量遠遠超出大眾APP的數量。
由於手機的廣泛使用，在這些企業ERP軟體中，將終端延伸到手機也是很自然的，手機成為PC的補充。由於企業ERP對開發成本敏感，所以要求快速開發，此時Delphi就有了優勢。體積大一點沒什麼關系。
Delphi發展到XE，其核心有兩點，一是全平台開發，通過FireMonkey框架，同樣的代碼，可以直接給不同的平台用。另一個是DataSnap中間件技術，DataSnap可以容易地實現三層資料庫結構，並且同時支持TCP/IP、HTTP協議和Rest協議。現在RESTful在跨平台方面不是正流行嗎？DataSnap早就支持它。

Ⅱ delphi的特性

Delphi發展至今，從Delphi1、Delphi2到Delphi XE3，不斷添加和改進各種特性，功能越來越強大。Delphi5開始添加了對IDE（集成開發環境）的很多改進新特性，擴展了資料庫支持（ADO和InterBase資料庫），帶有Internet支持的MIDAS改進版，TeamSouse版本控制工具，轉換功能，框架概念以及很多的新組件與新特性。
Delphi 6.0是Borland公司推出的一套無論是界面還是功能都近乎完美的應用程序開發工具。與以前的Delphi版本相比，Delphi 6.0使用更簡便，效率也更高。
Delphi 7.0使用更簡便，效率更高，最穩定的一個版本，被稱為開發人員的工具之最，也是Borland產品最頂峰時期，更是風靡全球。
Delphi2010內置的Direct 2D模塊及開發庫，其新加的功能：擁有一個能同時運作於x86和x64的IDE，在此IDE下將會有跨平台編譯器，能夠編譯用於linux和MAC的應用程序；將會支持windows7下的觸摸式編程；強化的DataSnap；將支持雲計算；將支持函數式編程，這需要很多時間，據David估計是2011會實現。
Delphi XE2實現了跨平台通用開發，通過Delphi XE2所帶的FireMonkey平台，Delphi可以開發跨平台應用程序，並原生編譯到Windows和Mac OS X平台。FireMonkey還可以為iPhone、iPod Touch和iPad創建iOS應用，並分發到蘋果公司的應用商店。Delphi的FireMonkey應用程序擁有完全的硬體加速。
Delphi XE3 可以發布不同平台的產品，包括Windows 7和Mac OS，未來還要支持手機版本的Android和IOS。
（1）直接編譯生成可執行代碼，編譯速度快。由於Delphi編譯器採用了條件編譯和選擇鏈接技術，使用它生成的執行文件更加精煉，運行速度更快。在處理速度和存取伺服器方面，Delphi的性能遠遠高於其他同類產品。
(2）支持將存取規則分別交給客戶機或伺服器處理的兩種方案，而且允許開發人員建立一個簡單的部件或部件集合，封裝起所有的規則，並獨立於伺服器和客戶機，所有的數據轉移通過這些部件來完成。這樣，大大減少了對伺服器的請求和網路上的數據傳輸量，提高了應用處理的速度。
(3）提供了許多快速方便的開發方法，使開發人員能用盡可能少的重復性工作完成各種不同的應用。利用項目模板和專家生成器可以很快建立項目的構架，然後根據用戶的實際需要逐步完善。
(4）具有可重用性和可擴展性。開發人員不必再對諸如標簽、按鈕及對話框等Windows的常見部件進行編程。Delphi包含許多可以重復使用的部件，允許用戶控制Windows的開發效果。
(5）具有強大的數據存取功能。它的數據處理工具BDE(BorlandDatabaseEngine）是一個標準的中介軟體層，可以用來處理當前流行的數據格式，如xBase、Paradox等，也可以通過BDE的SQLLink直接與Sybase、SQLServer、Informix、Oracle等大型資料庫連接。Delphi既可用於開發系統軟體，也適合於應用軟體的開發。
(6）擁有強大的網路開發能力，能夠快速的開發B/S應用，它內置的IntraWeb和ExpressWeb使得對於網路的開發效率超過了其他任何的開發工具。
(7)Delphi使用獨特的VCL類庫，使得編寫出的程序顯得條理清晰，VCL是現在最優秀的類庫，它使得Delphi在軟體開發行業處於一個絕對領先的地位。用戶可以按自己的需要，任意的構建、擴充、甚至是刪減VCL，以滿足不同的需要。
(8）從Delphi8開始Delphi也支持.Net框架下程序開發。
當前DELPHI 已經成為一個品牌，而不僅僅是一個開發平台或開發語言的名稱。當前DELPHI產品已經由CodeGear公司繼續發展，該公司是BORLAND公司的全資子公司。當前，CodeGear為廣大開發者提供了DELPHI FOR PHP，以高度可視化的方式全面支持面向對象的PHP網站開發，大大提高了PHP開發網站的代碼復用程度，成為WEB應用開發的新利器。

Ⅲ delphixe android mssql services datasnap 哪個好

覺得Delphi最強大的的功能之一就是開發資料庫三層應用的DataSnap，在Android上的實現，首先是完成伺服器的設計：
（1）利用向導完成DataSnap伺服器的框架，如下圖：

由於是實驗，所以選擇VCL程序，如果是實際應用，建議Service程序

我習慣使用TCP/IP作為通訊協議，簡單且速度快，Sample Methods是演示和測試用

預設211埠

使用TDSServerMole作為數據服務提供主體，非常方便變更為Service應用服務

（2）設置伺服器數據
在TDSServerMole中設置數據，為簡便起見，採用BDE引擎的DBDEMOS下animals.dbf資料庫，有文字也有圖片，如下圖：

放置一個TDataSetProvider連接該數據源，如下圖：

伺服器至此設計完成，沒有編寫一行代碼，只是調整了部分控制項和窗體的名稱。手動啟動該應用服務程序。
（3）新建Android客戶端程序
新建一個android客戶端程序，在工程中增加一個TDataMole模塊，用於放置與應用伺服器的連接和數據，在模塊窗體上放置TSQLConnection、TDSPProviderConnection、TClientDataSet三個控制項，如下圖：

其中TSQLConnection的屬性設置中LoginPrompt要設為False，TDSPProviderConnection的屬性設置如下：

其中ServerClassName是指應用伺服器上作為數據服務提供主體的TDSServerMole的實例類名稱，在這里我習慣性地重新命名了，預設一般是TServerMethods1。TClientDataSet的設置如下圖：

為實現應用伺服器上Sample Methods在客戶端的調用，需要創建服務類在客戶端的實現類，右鍵點擊TSQLConnection選擇生成，如下圖：

新生成的類定義如下：

以上過程完全同Windows下的DataSnap客戶端開發。

（4）Android界面顯示數據
Android下對數據的顯示，與Windows下開發最大的區別是，無法使用TDBEdit一類的數據感應控制項，取而代之的是標准控制項，通過LiveBindings技術實現數據感應。要實現該過程，首先是在窗體上放置用於數據展示的標准控制項，這里採用了TListBox和TGrid，通過TTabControl分開，如下圖：

IP和Port輸入框是為了更靈活地連接伺服器，下面的按鈕OnClick事件代碼如下：
procere TfrmMain.Button1Click(Sender: TObject);
var
dm : TdmServerMethodsClient;
begin
try
//連接指定IP和Port的應用伺服器
dmMain.SQLConn.Close;
dmMain.SQLConn.Params.Values['HostName'] := edtIP.Text;
dmMain.SQLConn.Params.Values['Port'] := edtPort.Text;
try
dmMain.SQLConn.Open;
try
//創建應用伺服器上的Sample Methods在客戶端的實現類
dm := TdmServerMethodsClient.Create(dmMain.SQLConn.DBXConnection);
//執行伺服器上的方法
ShowMessage(dm.ReverseString(edtIP.Text));
finally
dm.Free;
end;
//開啟客戶端數據集
dmMain.cdsanimals.Close;
dmMain.cdsanimals.Open;
except
on E: Exception do
ShowMessage(E.Message);
end;
finally
dmMain.SQLConn.Close;
end;
end;

Ⅳ DELPHI XE5中編輯出錯，請問可能是什麼原因

最近在學習DELPHI XE5，在學習datasnap時做好了伺服器，在寫客戶端程序時編譯出現下列錯誤提示：
[DCC Error] E2597 e:\\program files\\embarcadero\\rad studio\\12.0\\lib\\Android\\Release\libmidas.a(alchemy.o):(.data.rel.ro+0x8): undefined reference to `__cxa_pure_virtual'
e:\\program files\\embarcadero\\rad studio\\12.0\\lib\\Android\\Release\libmidas.a(alchemy.o):(.data.rel.ro+0x14): undefined reference to `__cxa_pure_virtual'
e:\\program files\\embarcadero\\rad studio\\12.0\\lib\\Android\\Release\libmidas.a(alchemy.o):(.data.rel.ro._ZTV13IClassFactory[_ZTV13IClassFactory]+0x8): undefined reference to `__cxa_pure_virtual'
e:\\program files\\embarcadero\\rad studio\\12.0\\lib\\Android\\Release\libmidas.a(alchemy.o):(.data.rel.ro._ZTV13IClassFactory[_ZTV13IClassFactory]+0xc): undefined reference to `__cxa_pure_virtual'
e:\\program files\\embarcadero\\rad studio\\12.0\\lib\\Android\\Release\libmidas.a(alchemy.o):(.data.rel.ro._ZTV13IClassFactory[_ZTV13IClassFactory]+0x10): undefined reference to `__cxa_pure_virtual'
e:\\program files\\embarcadero\\rad studio\\12.0\\lib\\Android\\Release\libmidas.a(alchemy.o):(.data.rel.ro._ZTV13IClassFactory[_ZTV13IClassFactory]+0x14): more undefined references to `__cxa_pure_virtual' follow
[DCC Fatal Error] F2588 Linker error code: 1 ($00000001)
Failed
Elapsed time: 00:14:00.9
求高手解答，程序內容完全按照該博客介紹進行http://www.cnblogs.com/ChinaEHR/p/3373364.html，不知道啥原因。

Ⅳ 求救，這個delphi xe8要怎麼破解

A Complete List of What's new in RAD Studio XE8

Key New Features

Benefits

INTEGRATED COMPILERS AND TOOLCHAINS

• New in XE8!iOS 64 bit Object Pascal compiler and toolchain

• New in XE8!iOS 64 bit C++ compiler and toolchain

• New in XE8!Support for iOS Universal Apps (including both 32 bit and 64 bit binaries in an app bundle)

FMX APPLICATION PLATFORM (FIREMONKEY)

• New in XE8!FireUI Mobile Previews

• New in XE8!Multi-Device Preview

• New in XE8!Extended Multi Device Designer views styling, including universal styling and Windows styles customization

• New in XE8!FireUI Device Manager, to edit the specifications of the available devices and add more

• New in XE8!Memo platform controls for iOS

• New in XE8!ListView platform controls for iOS

• New in XE8!Calendar platform controls for iOS

• New in XE8!Switch platform controls for iOS

• New in XE8!MapView component for mobile platforms (iOS and Android) supporting platform specific interactive mapping libraries (respectively, by Apple and Google)

• New in XE8!WebBrowser component for Windows

• New in XE8!WebBrowser component for OS X

• New in XE8!Improved mixing of platform and styled components, with new platform styling options for iOS and controls Z-order improvements (with ControlType property for non-platform controls)

• New in XE8!ImageList component for FireMonkey

• New in XE8!Enhancements in FireMonkey multimedia support

• New in XE8!Support for higher resolutions in Camera components

• New in XE8!Android Lollipop specific style enabled by default (Android only)

• New in XE8! FireMonkey Applications Analytics Support*
  * Requires a specific contract and by-volume fee for storing run-time analytics data and accessing it

• New in XE8!App Tethering extensions and protocol enhancements

• New in XE8!Bluetooth framework improvements and new TBluetooth component for classic Bluetooth

• New in XE8!Proximity support based on the "beacons" technology (including the iBeacon and AltBeacon standards) for iOS, Android, and OS X

VISUAL COMPONENT LIBRARY (VCL)

• New in XE8!VCL Font Scaling improvements

• New in XE8!VCL Applications Analytics Support*
  * Requires a specific contract and by-volume fee for storing run-time analytics data and accessing it

• New in XE8!VCL App Tethering extensions and protocol enhancements

• New in XE8!Bluetooth framework improvements and new TBluetooth component for classic Bluetooth

LANGUAGE AND RUNTIME LIBRARY FEATURES

• New in XE8!Simplified array initialization and construction for C++ Clang-based compilers

• New in XE8!iOS 64-bit API headers and RTL integration for Delphi and C++

• New in XE8!Box2D physics engine

• New in XE8!Object Pascal interfaces for the Box2D physics engine

• New in XE8!New System.Hash RTL unit, with hash functions to support the new HTTP framework

• New in XE8!New HTTP client framework, mapped to platforms libraries on all supported platforms

• New in XE8!New NetHTTPClient and NetHTTPRequest components, offering easy access to the HTTP client framework

• New in XE8!Support for native HTTP(S) client libraries on Windows

• New in XE8!Support for native HTTP(S) client libraries on OS X

• New in XE8!Support for native HTTP(S) client libraries on mobile platforms (iOS and Android)

PERSONAL DEVELOPER PRODUCTIVITY

• New in XE8!GetIt Package Manager for easy discovery, download and update of source code libraries, components, and other features from Embarcadero GetIt servers

• New in XE8!Configuration settings migration tool, to migrate configurations of older versions of the proct to a newer version, or between different installations of the same version

• New in XE8!Start Here page improvements

• New in XE8!extra code refactoring, live syntax checking, metrics, and more integrated right into the IDE

• New in XE8!Project Manager enhancements, with the support for adding database files and simplifying their deployment

• New in XE8!Improved installation experience and reced installation footprint

• New in XE8!Virtual form positioner for FireMonkey designer

• New in XE8!Project Statistics provides developers with a clear picture of team proctivity with activity tracking.

• New in XE8!Clipboard History keeps a record of clipboard contents so developers can paste content previously copied.

• New in XE8!Multi-Paste Support performs the same paste operation on multiple source code lines at once.

• New in XE8!Modeless and Context-Sensitive Refactoring support which includes: renaming variables, classes, field and properties, inlining, introcing and splitting local variables, removing unused variables, eliminating with statements, extracting methods, adding parameters, and moving classes to a different unit (Object Pascal language only).

• New in XE8!Stack Bookmarks improves code navigation.

• New in XE8!Parenthesis Matching provides a visual queue to keep code clear.

• New in XE8!Flow Control Highlighting provides visual representation of flow jumps in code directly in the editor.

• New in XE8!Structural Highlighting

• New in XE8!Code Navigation Toolbar places classes and methods into a drop down box for easy in-code navigation (Object Pascal language only).

• New in XE8!Smart Keys and Smart Symbol Search (Object Pascal language only)

• New in XE8!Code Analysis tracks code quality with several code statistics like length parameters, nested statements, and cyclomatic complexity (Object Pascal language only).

SOURCE CODE MANAGEMENT

• Enhanced in XE8!Version Insight – Integrated framework for supporting source code management tooling inside the IDE

• Enhanced in XE8!Subversion integration into the IDE, including change list labels, SVN merge dialog, branches switching and more

• Enhanced in XE8!Git version control integration into the IDE, now including authentication, Push and Pull changes to and from remote repositories

• Introced in XE8!Mercurial version control integration into the IDE (supports cloning your remote repository, commit changes locally, show log data)

INTEGRATED UNIT TESTING

• New in XE8!Integrated unit testing with the DUnitX testing framework

• Updated in XE8!Unit test wizards for quick and easy unit test and unit test project creation

DATABASE

• New in XE8!Core DB.PAS TField optimizations

FIREDAC MULTI-DEVICE DATA ACCESS LIBRARY

• New in XE8!FireDAC Teradata database support, based on the Teradata database ODBC driver

• New in XE8!FireDAC support for XE7 Change Views

• New in XE8!FireDAC support for change notifications

• New in XE8!Improved FireDAC updates management

• New in XE8!Tools and scripts to help migration of dbExpress code to FireDAC

• Updated in XE8!iOS and Android mobile database support, including SQLite, InterBase ToGo and IBLite

• Updated in XE8!Comprehensive support for SQLite v3.+ database, including "smart" data type recognition, supporting both dynamic and static linking

ENTERPRISE MOBILITY SERVICES

• New in XE8!FireDAC / EMS integration improvements, specifically focused on updates management

• New in XE8!EMS Push Notifications server support for iOS and Android

• New in XE8!EMS external credentials support

• New in XE8!Extended EMS Administrative API, now with EMS Installation and EMS Push Resources

• New in XE8!Database Connection Pooling and other EMS optimizations

• New in XE8!New EMSClientAPI component to simplify EMS client side development

• Enhanced in XE8!User, groups, sessions, and API calls analytics and reporting using a web based interface using the EMS Console

• New in XE8!Ability to export data from EMS Console to .CSV files

• New in XE8!Improved analytics for users and groups

• New in XE8!EMS client application to manage user accounts

DATASNAP CONNECTORS

• Enhanced in XE8!DataSnap mobile connectors for ObjectiveC, supporting iOS 7 and iOS 8 SDKs

INCLUDED DATABASES

• Enhanced in XE8!InterBase XE7 Developer Edition – up to 20 users and 80 logical connections

LICENSING AND TOOL MANAGEABILITY

• Enhanced in XE8!Earlier version licenses included in network licenses (Delphi 2007- XE7, C++ Builder 2007-XE5, HTML5 Builder XE3, RadPHP XE2). Delphi 7 and C++Builder 6 available separately