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![connecting to backend
GWT-RPC (yeah, it rocks), but in native package?
JSONP with with RequestBuilder & Autobean
JsonpRequestBuilder jsonp = new JsonpRequestBuilder();
String url = URL.encode(JSON_URL + "/sendData/" + “HelloWorld”);
jsonp.requestObject(url, new AsyncCallback<JavaScriptObject>() {
@Override
public void onFailure(Throwable caught) {
MgwtAppEntryPoint.phoneGap.getNotification().alert(caught.getMessage());
}
@Override
public void onSuccess(JavaScriptObject result) {
JSONObject jsObj = new JSONObject(result);
AutoBean<Score[]> bean = AutoBeanCodex.decode(factory, Score[].class, jsObj.toString());
Score[] scores = bean.as();
scoresCallback.onResponse(scores);
}
});](https://image.slidesharecdn.com/mobilejavawithgwt-151030184913-lva1-app6892/85/Mobile-Java-with-GWT-Still-Write-Once-Run-Everywhere-26-320.jpg)
Uploaded byAlex Theedom
Mobile Java with GWT: Still "Write Once, Run Everywhere"
The document discusses mobile development using Java and GWT (Google Web Toolkit), exploring various frameworks and tools for creating hybrid apps. It highlights the evolution of mobile frameworks, challenges with HTML5, and the potential of GWT to compile Java into high-performance JavaScript. Near the end, it touches on other Java-based mobile development solutions and cross-platform capabilities.
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Mobile Java with GWT: Still "Write Once, Run Everywhere"
- 1. Mobile Java withGWT (and alternatives) Murat Yener & Alex Theedom @yenerm @alextheedom
- 2. who (the hell)am I?!? Java, Flex, GWT, iOS, Android developer Principle Mentor at Eteration Eclipse Committer GDG (GTUG) Istanbul Organizer Conference Speaker Mobile App Developer at Intel
- 3. as a mobiledeveloper
- 4. what (the hell)is this talk about?!? The fifth element... The Webview.. HTML5 mobile frameworks Phonegap keeping native UX
- 5. so an HTML5talk??? Facebook killed HTML5 app.. Zuckerberg said HTML5 is not there yet!! try fastbook from sencha fb.html5isready.com LinkedIn moved to native!! so did they just fix it??
- 6.
- 7. Hybrid Apps: Teachingthe old dog new tricks?
- 8. html5 apps innative shell?? nuts!! this is too complicated!! have many of you have web development experience? how many of you develop native apps? how many of you don’t like web development just because of javascript??
- 9. but it isslow!! building games? 3d physics? image or sound processing? ... no most of the time we just do this!
- 10. wait is thisreally web? Angry Birds for Chrome (GWT) Quake on Mobile (requires Chrome Beta for WebGL) http://mediatojicode.com/q3bsp/ “We started with the existing Jake2 Java port of the Quake II engine, then used the Google Web Toolkit (along with WebGL, WebSockets, and a lot of refactoring) to cross-compile it into Javascript. You can see the results in the video above — we were honestly a bit surprised when we saw it pushing over 30 frames per second on our laptops (your mileage may vary)!” from Google Code Blog...
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- 13. GWT 101: javato javascript? GWT compiler does the magic Optimized high performance javascript cross browser compability (upto ie6) not really mobile look’n feel :(
- 14.
- 15. gwt frameworks? gwt-mobile-webkit: database,storage, geolocation, widgets(?) http://code.google.com/p/gwt-mobile-webkit/ gwtmobile: GwtMobile-UI, Gwtmobile- Persistence, GwtMobile-PhoneGap(!) http://code.google.com/p/gwtmobile/ touch4j: Sencha, http://www.emitrom.com/gwt4touch mgwt: UI Widgets, GWT-Phonegap http://code.google.com/p/mgwt/
- 16. so what ismGWT mobile widget library on gwt native looking widgets for each platform maven friendly mvp ready (maven archetype) and with gwt-phonegap
- 17. where to start? getthe source https://code.google.com/p/mgwt or download the jar or just use maven <dependency> <groupId>com.googlecode.mgwt</groupId> <artifactId>mgwt</artifactId> <version>1.1.2</version> </dependency>
- 18. Hello World!! public classMGWTEntryPoint implements EntryPoint { public void onModuleLoad() { // set viewport and other settings for mobile MGWT.applySettings(MGWTSettings.getAppSetting()); // build animation helper and attach it AnimationHelper animationHelper = new AnimationHelper(); RootPanel.get().add(animationHelper); // build some UI LayoutPanel layoutPanel = new LayoutPanel(); Button button = new Button("Hello mgwt"); layoutPanel.add(button); // animate animationHelper.goTo(layoutPanel, Animation.SLIDE); } }
- 19. using other libs: ex.maps.. Google Maps Ver 2.0: http://code.google.com/p/gwt-google- apis/ Google Maps Ver 3.0: http://code.google.com/p/gwt-google- maps-v3/ No Javascript so far! <inherits name='com.google.gwt.maps.GoogleMaps' />
- 20. add a littespice: phonegap geolocation camera accelerator compass phonebook file system even nfc
- 21. phonegap in action ... Buttonbutton = new Button("Hello mgwt"); button().addTapHandler(new TapHandler() { @Override public void onTap(TapEvent event) { phoneGap.getNotification().alert("Done!!"); } }); layoutPanel.add(button); ...
- 22. phonegap, in realaction phoneGap.getGeolocation().watchPosition(geolocationOptions, new MyGeolocationCallback(){ @Override public void onSuccess(Position position) { // check accuracy if (position.getCoordinates().getAccuracy() > 11) { raceView.getLabel().setText("Error: Accuracy"); } // geolocation returns mps, multiply with 3.6 to convert to kph double speed = 3.6 * position.getCoordinates().getSpeed(); if (speed > 0.2) {// if going raceView.getLabel().setText(speed + "km @" + position.getCoordinates().getAccuracy()); currentLocation = position; // got the position now can start! start(); // stop if the threshold is reached if (isGoing && speed >= 60) { MgwtAppEntryPoint.phoneGap.getGeolocation().clearWatch(geolocationWatcher); endLocation = position; calculate(); } } else {// if stoped raceView.getLabel().setText("get ready!!"); isGoing = false; } } @Override public void onFailure(PositionError error) { MgwtAppEntryPoint.phoneGap.getNotification().alert("Problem getting location"); } });
- 23. even more... public voidonTap(TapEvent event) { final MCheckBox check = ((MCheckBox) event.getSource()); if (check.getValue()) { if (TWITTER.equalsIgnoreCase(type)) profileView.getBrowser().showWebPage(Service.BASE_URL + "auth/twitter"); else if (FACEBOOK.equalsIgnoreCase(type)) profileView.getBrowser().showWebPage(Service.BASE_URL + "auth/facebook"); profileView.getBrowser().addLocationChangeHandler(new ChildBrowserLocationChangedHandler() { @Override public void onLocationChanged(ChildBrowserLocationChangedEvent event) { //Do the login... } }); } } }
- 24. going fancy, mvp! codeyour UI in the View preferably in xml via UIBinder and your logic in the controller (activity) sound familiar? easy navigation lots of boilerplate code
- 25.
- 26. connecting to backend GWT-RPC(yeah, it rocks), but in native package? JSONP with with RequestBuilder & Autobean JsonpRequestBuilder jsonp = new JsonpRequestBuilder(); String url = URL.encode(JSON_URL + "/sendData/" + “HelloWorld”); jsonp.requestObject(url, new AsyncCallback<JavaScriptObject>() { @Override public void onFailure(Throwable caught) { MgwtAppEntryPoint.phoneGap.getNotification().alert(caught.getMessage()); } @Override public void onSuccess(JavaScriptObject result) { JSONObject jsObj = new JSONObject(result); AutoBean<Score[]> bean = AutoBeanCodex.decode(factory, Score[].class, jsObj.toString()); Score[] scores = bean.as(); scoresCallback.onResponse(scores); } });
- 27. accessing native js canuse any existing javascript use javascript in type safe way BUT!! don’t mess touch events!! AND beware you are not in the safe and optimized zone anymore!!
- 28. JSNI public native staticString key(int index) /*-{ return $wnd.localStorage.key(index); }-*/; public native static void setItem(String key, String value) /*-{ $wnd.localStorage.setItem(key, value); }-*/; public native static String getItem(String key) /*-{ return $wnd.localStorage.getItem(key); }-*/; public native static void removeItem(String key) /*-{ $wnd.localStorage.removeItem(key); }-*/; public native static void clear() /*-{ $wnd.localStorage.clear(); }-*/;
- 29. building my swipepanel just like the one in sencha wrapped swipeview from cubiq
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- 32.
- 33. gwtquery coming from jQuery,no problem! public void onModuleLoad() { //Hide the text and set the width and append an h1 element $("#text").hide() .css("width", "400px") .prepend("<h1>GwtQuery Rocks !</h1>"); //add a click handler on the button $("button").click(new Function(){ public void f() { //display the text with effects and animate its background color $("#text").as(Effects) .clipDown() .animate("backgroundColor: 'yellow'", 500) .delay(1000) .animate("backgroundColor: '#fff'", 1500); } }); }
- 34. skinning default themes for Android(>4.0) iOS/iOS retina (<7.0) Blackberry easy to create yours https://code.google.com/p/mgwt/wiki/Styling //append your own css as last thing in the head MGWTStyle.injectStyleSheet("yourcssfile.css");
- 35. wait, css injava?!? .mgwt-Button { display: inline-block; float: left; width: 145px; height: 100px; border: 1px solid rgba(0,0,0,0.23); background: #ff6600; border-radius: 6px; box-shadow: inset -1px 0px 0px rgba(255,255,255,0.41), inset 1px 0px 0px rgba(255,255,255,0.21), inset 0px -1px 0px rgba(0,0,0,0.21), inset 0px 1px 0px rgba(255,255,255,0.41), 0px 1px 2px rgba(0,0,0,0.21); text-align: center; font-size: 14px; margin: 5px; font-weight: bold; text-shadow: 0px 1px 1px rgba(0,0,0,0.49); color: white; line-height: 124px; }
- 36. debugging first class javadebugging in your IDE GWT pretty compile and debug javascript in your browser use source maps and debug java in your browser!! use remote debugging to debug on mobile devices
- 37. what about others? iOS,works like charm.. pretty much native android, near native experience blackberry windows phone tablets? desktop??
- 38. what can ireally build? anything! but why not going native for games many widgets.. lists, carousels, forms dev friendly, you know java? just dive in! make use of current js windows phone? seriously?!?
- 39. </slides> GDG Istanbul (every3. or 4. Saturday) Interested in OSGi? No? ok, i thought so… and GWT.create at San Francisco murat@muratyener.com @yenerm devchronicles.com
- 40. 40% discount with promo code VBK43 whenordering through wiley.com valid until end of December 2015
- 41. who (the hell)am I?!? Java (Spring/EE) developer Microservices Jersey Coders Mentor Conference Speaker
- 42. Cross-platform Mobile Development Develop oncerun on multiple platforms Choose just ‘one’ language
- 43.
- 44.
- 45. Lets see somecode UI coded in Java Rendered in native UI
- 46. Codename One Compile tonative C# JDK 1.3 iOS Windows Phone C Java 5
- 47. Lets see somecode Familiar to Swing and GWT coders Java 8 next release
- 48. Oracle Mobile Application Framework(MAF) Only Jdeveloper or Eclipse Lightweight JVM
- 49. Lets see somecode Flow define GUI Device feature via DeviceManager