Post on 15-Jan-2015
description
MonoTouch andMono for Android
NxtGen User GroupCambridge, Shenfield & Southampton
10th -12th May 2011
with some Windows Phone 7
Chris Hardy
Chris Hardy
• ASPInsider
• Write some books
• http://twitter.com/chrisntr
• Work for great fridays
Covering...
• How these technologies work
• Demos
• Similarities between MonoTouch and Mono for Android
• Code Re-use with MonoTouch, Mono for Android and Windows Phone 7
MonoTouch
What is Mono?
The .Net Frameworkcreated by Miguel De Icaza
et al.
Miguel de Icaza
What is MonoTouch?
C# and .NET on the iPhone
Demo - Walkthrough
Mono’s JIT Engine
CIL
Mono
Memory
Apple Rules
• Contractual Requirements
• No interpreted code
• No shared libraries
• Kernel Limitations
• iPhone OS 2.0+ disables JIT
Mono’s AOT Engine
CIL
Mono
AOTMono Runtime
ARM
Native Code
MonoTouch Features• mtouch• MonoDevelop iPhone Add-In• CocoaTouch.NET / monotouch.dll• Full static AOT compiler• Support for all your existing code• Reflection• Generics• LINQ• Anonymous Methods• Lambda’s etc...
MonoTouch’s APIs
Strong Types
• Objective-C
• Arrays are weakly typed:• NSArray return values.
• MonoTouch has strong types
• UIView[] Subviews { get; }• vs• NSArray *subviews;
• Intellisense - explore the API...
MonoTouch Events• Supports Objective-C pattern (including
blocks):
webView.Delegate = new MyWebViewDelegate();
• C# style events as well:
webView.PageLoaded += delegate {HideSpinningWheel();
}
Garbage Collection• Automatic:
• Mono’s GC will collect objects on demand
• Deterministic:
• Use when you need control.
• Every object in MonoTouch implements IDisposable
using (var image = UIImage.FromFile(“foo.png”)){
surface.DrawImage(image, 20, 20);
}
MonoTouch Design Integration
• Integrates with Interface Builder and Xcode 3
• Xcode 4 support coming
Demo - Integration
Learn to read Objective-C
Learn to read Objective-C
• All Apple documentation is in Obj-C
• Most examples are in Obj-C
• It’s not too hard to understand
• It might even be fun...
The Bindings• MonoTouch namespace
• MonoTouch.Foo namespace
• Maps to CocoaTouch’s Foo Framework
• 1:1 Mapping of classes.
• MonoTouch.UIKit.UILabel
• CocoaTouch’s UIKit framework, UILabel class
Binding against 3rd party libraries
• https://github.com/chrisntr/monotouch-bindings/tree/master/BingMaps
• Demo showing Bing iOS control in MonoTouch
Who’s using MonoTouch?
• Medtronic - http://www.apple.com/ipad/business/profiles/medtronic/
• iCircuit - http://itunes.apple.com/us/app/icircuit/id383359044?mt=8
• Showcase of apps - http://monotouch.net/Apps/?tag=/Showcase
Getting started
• Get iPhone SDK from Apple
• Get Mono from Novell
• Get MonoTouch (evaluation version is free)
• Get MonoDevelop
• Register with Apple iPhone Developer Program and purchase MonoTouch for putting apps on device and AppStore.
DemoTwitter on iPhone with MonoTouch
What is Mono for Android?
What is MonoDroid?
C# and .NET on Android
Demo
How does MonoDroid work?
What is MonoDroid?
Cross-platform
MonoDroid Features• mandroid.exe• Visual Studio 2010 Integration• MonoDevelop MonoDroid Add-In• Mono.Android.dll• Full static AOT compiler and JIT support• Support for all your existing code• Reflection• Generics• LINQ• Anonymous Methods• Lambda’s etc...
What is MonoDroid?
v1.0 released in March
was expected late 2010...
What is MonoDroid?
Expect rapid releases a la MonoTouch
What is MonoDroid?
A commercial product
same prices as MonoTouch
What is MonoDroid?
Give feedback!Submit bugs!
http://monodroid.net/
Mono for Android book on its way!
Out around July
DemoTwitter on Android with MonoDroid
Similarities with MonoTouch and
MonoDroid
Linkerand the application size...
What about App Size?
• 20 MB (compressed) limit on 3G/Edge downloads
• .Net BCL and other libraries are huge
• Mono Linker to the rescue!
Linking Assemblies
Linker Options
• No Link
• Link SDK Only
• Full Link
Same Base Class Libraries
More on this later...
Debugger
• MonoTouch/MonoDroid debugger leverages Mono’s Soft-Debugger
• Supports the Simulator
• Supports the Device - on paid versions
• even over WiFi*
Debugger Features• Breakpoints
• Catchpoints
• Inspection
• Watches
• Immediate / Expression Evaluator
• Call Stack
• Stepping
App-store Minimum MonoTouch App Size
~1MB
Minimum Compressed MonoTouch App Size
~4MB
4.4MB
Minimum MonoDroid App Size (the .apk)
2.2MBCompressed
Code reuse
Code reuse
Json.Net
FlickrNet
XNATouch (Now MonoGame)
Rebuild your libraries
• Can’t just use any DLL
• Re-compile for each lib
• Each framework has its own class library
Portable Library Project
will help
Not an abstraction!
Not an abstraction!
• Platform specific APIs
• Platform specific look and feel
Mono for WP7?
Mono for WP7?
• Look at Mono code and copy over!
• IQueryable support in WP7
• More later...
Porting over Hanselminutes
Porting over Hanselminutes
hanselminutesiphone.codeplex.com
Porting over Hanselminutes
• Make sure your business logic is separate
• Use actions for returning results
Getting XML
Persisting the XML
Isolated Storagevs
File Storage
Storing data void SaveLocal(string data) {#if (MonoTouch || MonoDroid) File.WriteAllText(_localPath, data);#elif WINDOWS_PHONE using (var appStorage = IsolatedStorageFile.GetUserStoreForApplication()) { var file = appStorage.OpenFile(_localPath, FileMode.Create); FileExtension.WriteAllText(file, data); }#endif }
Storing data void SaveLocal(string data) {#if (MonoTouch || MonoDroid) File.WriteAllText(_localPath, data);#elif WINDOWS_PHONE using (var appStorage = IsolatedStorageFile.GetUserStoreForApplication()) { var file = appStorage.OpenFile(_localPath, FileMode.Create); FileExtension.WriteAllText(file, data); }#endif }
No File.WriteAllText?
No problem!
Implementing File.WriteAllText
public static void WriteAllText(IsolatedStorageFileStream fileStream, string data) { using (StreamWriter sw = new StreamWriter(fileStream)) { sw.Write(data); sw.Close(); } }
public static void WriteAllText(string path, string contents) { WriteAllText(path, contents, Encoding.UTF8); }
public static void WriteAllText(string path, string contents, Encoding encoding) { using (StreamWriter sw = new StreamWriter(path, false, encoding)) { sw.Write(contents); } }
Mono Abstractions
With MonoMobile.Extensions in the futurehttps://github.com/chrisntr/MonoMobile.Extensions