Native FTW: Integrating native views in Titanium apps

TICONFEU,AMSTERDAM,29/06/2014
{native: “FTW”}
!
Integrating native views in Titanium apps
Olivier Morandi

Olivier Morandi
Software engineer
!
http://titaniumninja.com!
olivier.morandi@gmail.com
@olivier_morandi
https://github.com/omorandi
2

TICONFEU,AMSTERDAM,29/06/2014 3

• Ti app development
• Native module development (iOS/Android)
• Optimisations
• R&D
4

This Talk
• How to create view-based native modules
• How to integrate third party libraries
5

Not in This Talk
• Basics of native module development
★ module creation
★ proxies, methods, properties, events,
callbacks
• Check out http://www.slideshare.net/
omorandi/ticonf
6

Why Native Views
• UX/Performance
★ Stock Ti UI components not suitable for
the speciﬁc UX requirements
• Integration of native UI components and
libraries
★ Leverage existing solutions from the
Android and iOS OSS communities
★ Integrate third party SDKs
7

Ti.Next/Hyperloop
• Q: Are Ti.Current native modules still
relevant?
• A: YES!
★ Ti.Next/Hyperloop is WIP
★ Active need in current Titanium projects
★ Maintaining legacy modules
8

Learning Resources

Oﬃcial Appcelerator Guides
• http://docs.appcelerator.com/titanium/latest/#!/guide/
Extending_Titanium_Mobile
iOS_Module_Development_Guide
Android_Module_Development_Guide
10

Source code
• Titanium Mobile SDK
★ https://github.com/appcelerator/
titanium_mobile
• Open source modules from Appcelerator
★ https://github.com/appcelerator/
titanium_modules
12

Follow these people (and more)
• Aaron K. Saunders: https://github.com/aaronksaunders
• Adam Paxton: https://github.com/adampax/
• Ben Bahrenburg: https://github.com/benbahrenburg
• David Bankier: https://github.com/dbankier
• Jordi Domenec: https://github.com/iamyellow
• Mads Møller: https://github.com/viezel
• Marcel Pociot: https://github.com/mpociot
• Matt Apperson: https://github.com/mattapperson
• Paul Mietz Egli: https://github.com/pegli
• Ruben Fonseca: https://github.com/rubenfonseca
• Many more… ﬁnd them on http://gitt.io/
13

Architecture Recap

Titanium cli (node.js)

Runtime (iOS)
16
Titanium
Modules
(API)
JS APP
Parser
Interpreter
IOS SDK
Bytecode
gen
JavaScriptCore
objective-c
C++
KROLLBRIDGE

Runtime (iOS)
16
Titanium
Modules
(API)
JS APP
Parser
Interpreter
IOS SDK
Bytecode
gen
JavaScriptCore
NO JIT
objective-c
C++
KROLLBRIDGE

Titanium
Modules
(API)
JS APP
Parser
Native Code
Android SDK
Native Code
gen
KROLLBRIDGE
Runtime (Android)
17
Java
C++
V8
OPT

Terminology
18
var win1 = Titanium.UI.createWindow({
title:'Hello World',
backgroundColor:'white'
});
!
var label1 = Titanium.UI.createLabel({
color:'black',
textAlign:'center',
width: 100
});
!
label1.text = 'howdy?';
win1.add(label1);
!
win1.open();

Terminology
18
});
!
color:'black',
textAlign:'center',
width: 100
});
!
win1.add(label1);
!
win1.open();
module
object

Terminology
18
});
!
color:'black',
textAlign:'center',
width: 100
});
!
win1.add(label1);
!
win1.open();
factory
method

Terminology
18
});
!
color:'black',
textAlign:'center',
width: 100
});
!
win1.add(label1);
!
win1.open();
creation
properties

Terminology
18
});
!
color:'black',
textAlign:'center',
width: 100
});
!
win1.add(label1);
!
win1.open();
proxy
object

Terminology
18
});
!
color:'black',
textAlign:'center',
width: 100
});
!
win1.add(label1);
!
win1.open();
view proxy
object

Terminology
18
});
!
color:'black',
textAlign:'center',
width: 100
});
!
win1.add(label1);
!
win1.open();
proxy
property

Terminology
18
});
!
color:'black',
textAlign:'center',
width: 100
});
!
win1.add(label1);
!
win1.open();
proxy
method

Proxies & Modules
Proxy
ViewProxy ViewModule
extends
has a
creates
19
manages
NativeView Type

iOS UIView

AndroidView
extends

Proxies & Modules
Proxy
extends
has a
creates
19
manages
NativeView Type

iOS UIView

AndroidView
State:
properties
Actions:
methods
Events:
addEventListener(), fireEvent()
Interface
extends

Proxies & Modules
Proxy
extends
has a
creates
19
manages
NativeView Type

iOS UIView

AndroidView
State:
properties
Actions:
methods
Events:
Interface
Methods for the integration within the
application lifecycle
•startup() (iOS)
•shutdown() (iOS)
•onAppCreate() (Android)
extends

Proxies & Modules
Proxy
extends
has a
creates
19
manages
NativeView Type

iOS UIView

AndroidView
State:
properties
Actions:
methods
Events:
Interface
Additional members for the integration
within the UI layout system:
•add()
•remove()
•height
•width
•backgroundColor
•...
Methods for the integration within the
application lifecycle
•startup() (iOS)
•shutdown() (iOS)
•onAppCreate() (Android)
extends

ViewProxy
20
ViewProxy
View
NativeViews
Hierarchy
Methods
Properties
(get/set)
Events
Holds the state
of a view
Manages the
native view
hierarchy

ViewProxy
20
ViewProxy
View
NativeViews
Hierarchy
Methods
Properties
(get/set)
Events
Holds the state
of a view
Manages the
native view
hierarchy
JS THREAD

ViewProxy
20
ViewProxy
View
NativeViews
Hierarchy
Methods
Properties
(get/set)
Events
Holds the state
of a view
Manages the
native view
hierarchy
JS THREAD UI THREAD

ViewProxy
20
ViewProxy
View
NativeViews
Hierarchy
Methods
Properties
(get/set)
Events
Holds the state
of a view
Manages the
native view
hierarchy
JS THREAD UI THREAD
ASYNC

A Basic Native View

Usage Scenario
23
var win = Ti.UI.createWindow({
backgroundColor: 'white'
});
!
var ticonf = require('ti.conf');
!
var basicView = ticonf.createBasicView({
width: 100,
height: 100
});
!
win.add(basicView);
!
win.open();
app.js

ViewProxy Class
24
#import "TiViewProxy.h"
!
@interface TiConfBasicViewProxy : TiViewProxy
@end
TiConfBasicViewProxy.h
TiConfBasicViewProxy.m
#import "TiConfBasicViewProxy.h"
!
@implementation TiConfBasicViewProxy
!
!
@end

View Class
25
#import "TiUIView.h"
!
@interface TiConfBasicView : TiUIView
{
UIView *theView;
}
@end
TiConfBasicView.h
TiConfBasicView.m
#import "TiConfBasicView.h"
!
@implementation TiConfBasicView
!
-(void)initializeState
{
theView = [[UIView alloc] initWithFrame:self.bounds];
theView.backgroundColor = [UIColor redColor];
[self addSubview:theView];
}
!
@end

WTF: where’s my view?

TiConfBasicView

TiConfBasicView
theView

Managing the subview frame
27
TiConfBasicView.m
!
!
!
{
theView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
}
!
@end

Managing the subview frame
27
TiConfBasicView.m
!
!
!
{
theView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
}
!
@end
The Ti View frame is managed by the Ti
layout system.
Bounds are not valid until the view takes
part to an on-screen Ti view hierarchy

An alternative
28
TiConfBasicView.m
{
}
!
!
!
-(void)frameSizeChanged:(CGRect)frame bounds:(CGRect)bounds
{
theView.frame = bounds;
}

An alternative
28
TiConfBasicView.m
{
}
!
!
!
-(void)frameSizeChanged:(CGRect)frame bounds:(CGRect)bounds
{
theView.frame = bounds;
}
called by -[TiUIView drawRect:]

ViewProxy Class
29
@Kroll.proxy(creatableInModule=AndroidModule.class)
public class BasicViewProxy extends TiViewProxy
{
// Constructor
public BasicViewProxy()
{
super();
}
!
@Override
public TiUIView createView(Activity activity)
{
TiUIView view = new BasicView(this);
return view;
}
!
}
BasicViewProxy.java

View Class
30
public class BasicView extends TiUIView
{
View theView;
public BasicView(TiViewProxy proxy) {
super(proxy);
!
Activity context = proxy.getActivity();
theView = new View(context);
theView.setBackgroundColor(Color.RED);
getLayoutParams().autoFillsHeight = true;
getLayoutParams().autoFillsWidth = true;
setNativeView(theView);
}
!
}
BasicView.java

Properties
• Properties belong to the ViewProxy object
• How do we make use of property values in
View objects?
32

Setting a property
33
var basicView = ticonf.createBasicView({
color: "red"
});
!
//or
!
basicView.color = "red";

Property from the Proxy
34
!
UIColor *color = [[TiUtils colorValue:[self.proxy valueForKey:@"color"]] color];
TiConfBasicView.m
Retrieving the property value from the ViewProxy when needed

Explicit Setter in the ViewProxy
35
-(void)setColor:(UIColor*)color
{
theView.backgroundColor = color;
}
TiConfBasicView.m
-(void)setColor:(id)args
{
//expect 1 argument
ENSURE_ARG_COUNT(args, 1);
UIColor *color = [[TiUtils colorValue:args] color];
//dispatch to the view on UI thread
//(create it if needed, don't wait for completion)
[self makeViewPerformSelector:@selector(setColor:)
withObject:color createIfNeeded:YES waitUntilDone:NO];
}

35
{
}
TiConfBasicView.m
{
//expect 1 argument
}
JS
THREAD

35
{
}
TiConfBasicView.m
{
//expect 1 argument
}
JS
THREAD
UI
THREAD

Implicit Setter in the View Class
36
-(void)setColor_:(id)arg
{
theView.backgroundColor = [[TiUtils colorValue:arg] color];
}
TiConfBasicView.m

Implicit Setter in the View Class
36
-(void)setColor_:(id)arg
{
theView.backgroundColor = [[TiUtils colorValue:arg] color];
}
TiConfBasicView.m
Automatically dispatched by the
ViewProxy on the UI thread

Property from the Proxy
37
!
int color = TiConvert.toColor((String) proxy.getProperty(“color"));
BasicView.java

Creation Properties
38
BasicView.java
@Override
public void processProperties(KrollDict props)
{
super.processProperties(props);
if (props.containsKey("color")) {
theView.setBackgroundColor(TiConvert.toColor(props.getString("color")));
}
else if (…) {
//do something else
}
}

Property Changed Listener
39
BasicView.java
@Override
public void propertyChanged(String key, Object oldValue, Object newValue, KrollProxy proxy)
{
if (key.equals("color")) {
theView.setBackgroundColor(TiConvert.toColor((String)newValue));
} else if () {
//do something else
}
}
public abstract class TiUIView implements KrollProxyListener
titanium_mobile/android/titanium/src/java/org/appcelerator/titanium/view/TiUIView.java:73

Methods
• Exposed to JS by the ViewProxy object
• Dispatched to the View object
40

View Methods
41
basicView.makeRounded();

View Method
43
-(void)makeRounded
{
theView.layer.cornerRadius = 20;
}
TiConfBasicView.m
-(void)makeRounded:(id)args
{
ENSURE_UI_THREAD(makeRounded, args);
TiConfBasicView *thisView = (TiConfBasicView*)[self view];
[thisView makeRounded];
}

View Method
43
-(void)makeRounded
{
}
TiConfBasicView.m
{
}
JS
THREAD

View Method
43
-(void)makeRounded
{
}
TiConfBasicView.m
{
}
JS
THREAD
UI
THREAD

Dispatching via GCD
44
-(void)makeRounded
{
}
TiConfBasicView.m
{
dispatch_async(dispatch_get_main_queue(), ^{
});
}

View Method Dispatching
45
public void makeRounded() {
GradientDrawable shape = new GradientDrawable();
shape.setColor(Color.RED);
shape.setCornerRadius(50);
theView.setBackgroundDrawable(shape);
}
BasicView.java
@Kroll.method
TiMessenger.postOnMain(new Runnable() {
!
@Override
public void run() {
BasicView view = (BasicView)getOrCreateView();
view.makeRounded();
}
});
}
BasicViewProxy.java

45
}
BasicView.java
@Kroll.method
!
@Override
public void run() {
view.makeRounded();
}
});
}
BasicViewProxy.java
JS
THREAD

45
}
BasicView.java
@Kroll.method
!
@Override
public void run() {
view.makeRounded();
}
});
}
BasicViewProxy.java
JS
THREAD
UI
THREAD

Message Dispatching
46
private static final int MSG_MAKE_ROUNDED = TiViewProxy.MSG_LAST_ID + 4001;
protected static final int MSG_LAST_ID = MSG_MAKE_ROUNDED;
!
private void handleMakeRounded() {
view.makeRounded();
}
@Override
public boolean handleMessage(Message msg){
if (msg.what == MSG_MAKE_ROUNDED) {
handleMakeRounded();
return true;
}
return super.handleMessage(msg);
}
@Kroll.method
if (TiApplication.isUIThread()) {
handleMakeRounded();
} else {
TiMessenger.sendBlockingMainMessage(getMainHandler().obtainMessage(MSG_MAKE_ROUNDED));
}
}
BasicViewProxy.java

View Events
47
basicView.addEventListener('viewTapped', function() {
alert('tapped');
});

Firing Events
48
{
// other initialisation operations
!
UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc]
initWithTarget:self action:@selector(basicViewTapped:)];
// Specify that the gesture must be a single tap
tapRecognizer.numberOfTapsRequired = 1;
// Add the tap gesture recognizer to the view
[theView addGestureRecognizer:tapRecognizer];
}
!
- (void)basicViewTapped:(UITapGestureRecognizer *)recognizer {
NSDictionary *event = @{@"color": @"red"};
[self.proxy fireEvent:@"viewTapped" withObject:event];
}
TiConfBasicView.m

Firing Events
49
public BasicView(final TiViewProxy proxy) {
super(proxy);
!
Activity context = proxy.getActivity();
theView = new View(context);
!
//other initialisation operations
View.OnTouchListener gestureListener = new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent e) {
KrollDict event = new KrollDict();
event.put("color", "red");
proxy.fireEvent("viewTapped", event);
return true;
}
};
theView.setOnTouchListener(gestureListener);
!
setNativeView(theView);
}
BasicView.java

Integrating Third
Party Libraries

iOS Static Library
• Static library ﬁle (.a)
• Objective-c/C/C++ headers folder
51

iOS Static Library
52

iOS Static Library
52
includes (headers) folder

iOS Static Library
52
static lib ﬁle (.a)

iOS Static Library
52
static lib ﬁle (.a)
ensure the lib is linked
with the module

iOS Frameworks
• Framework bundle
★ Header ﬁles
★ Library
★ Resources
53

iOS Frameworks
54
TITANIUM_SDK_VERSION = 3.2.3.GA
!
!
TITANIUM_SDK = ~/Library/Application Support/Titanium/mobilesdk/osx/$(TITANIUM_SDK_VERSION)
TITANIUM_BASE_SDK = "$(TITANIUM_SDK)/iphone/include"
TITANIUM_BASE_SDK2 = "$(TITANIUM_SDK)/iphone/include/TiCore"
HEADER_SEARCH_PATHS= $(TITANIUM_BASE_SDK) $(TITANIUM_BASE_SDK2) /PATH/TO/YOUR/FRAMEWORK/HEADERS
titanium.xcconﬁg

iOS Frameworks
54
TITANIUM_SDK_VERSION = 3.2.3.GA
!
!
TITANIUM_SDK = ~/Library/Application Support/Titanium/mobilesdk/osx/$(TITANIUM_SDK_VERSION)
TITANIUM_BASE_SDK = "$(TITANIUM_SDK)/iphone/include"
TITANIUM_BASE_SDK2 = "$(TITANIUM_SDK)/iphone/include/TiCore"
HEADER_SEARCH_PATHS= $(TITANIUM_BASE_SDK) $(TITANIUM_BASE_SDK2) /PATH/TO/YOUR/FRAMEWORK/HEADERS
titanium.xcconﬁg
Used ad module build time

iOS Frameworks
55
!
OTHER_LDFLAGS=$(inherited) -framework <FRAMEWORK> -F <PATH/TO/FRAMEWORK>
!
For example:
!
OTHER_LDFLAGS=$(inherited) -framework ArcGIS -F $HOME/Library/SDKs/ArcGIS/iOS/
module.xcconﬁg

iOS Frameworks
55
!
OTHER_LDFLAGS=$(inherited) -framework <FRAMEWORK> -F <PATH/TO/FRAMEWORK>
!
For example:
!
OTHER_LDFLAGS=$(inherited) -framework ArcGIS -F $HOME/Library/SDKs/ArcGIS/iOS/
module.xcconﬁg
Used ad application build time

ARC vs. NON-ARC
• ARC = Automatic Reference Counting
★ Retain/Release handled automatically by
the Clang compiler
• Ti module template project is still NON-
ARC
• You can use ARC code inside of a Ti
module project
56

Enabling ARC for a speciﬁc ﬁle
57

Using external JARs
58
drag & drop the JAR in the
lib folder of the module
project

Using external JARs
59
Add the external JAR
to the project build
path

Integrating native libs (NDK)
60
Import the native shared
libraries (.so), separated
by target architecture in
the lib folder

Fix build.xml
61
<project name="android" default="dist">
<description>
Ant build script for Titanium Android module android
</description>
!
<property name="ti.module.root" location="${basedir}"/>
<property file="build.properties" />
!
<import file="${titanium.platform}/../module/android/build.xml"/>

<target name="post.jar">
<copy todir="${libs}">
<fileset dir="lib">
<include name="**/*.so"/>
</fileset>
</copy>
</target>
</project>
build.xml
Copy the .so ﬁles from lib to
libs before packaging
Paul Mietz Egli: http://developer.appcelerator.com/question/121573/how-do-i-use-so-library-in-module#answer-228134

Questions?

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