David Defour - Université de Perpignan

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Don’t Catch Generic Exception • List each Exception type –Yes try { … } catch(ExceptionType1 et1) { … } catch(ExceptionType2 et2) { … } 344 jeudi 26 janvier 12 –No try { … } catch(Exception e) { … }
Why Generic Exception Rule is (Arguably) Too Strict • Listing each type is almost always best –So exceptions you didn’t expect don’t get caught there –So real failure-handling is not obscured • Sometimes combining is concise and safe 345 jeudi 26 janvier 12 –E.g., if someString could be null, you could have either NumberFormatException or NullPointerException. But, in both cases, you just want to use original value for n. int n = 10; try { n = Integer.parseInt(someString); } catch(Exception e) { }
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jeudi 26 janvier 12 PROGRAMMATION S
Page 3 and 4:
jeudi 26 janvier 12 DESCRIPTION DU
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DESCRIPTION • Titre : Réalisatio
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jeudi 26 janvier 12 EXAMPLE: APP IN
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jeudi 26 janvier 12 DÉPLACEMENTS O
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GESTION DU CONTRÔLE Ordre Fonction
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RÉFÉRENCES: • http://lwh.free.f
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• Motivations RÉSUMÉ DU COURS
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AVANTAGES DES APPLI WEB • Accès
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AVANTAGES DES APPLI MOBILES • Plu
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INCONVÉNIENTS DES APPS • Pas d
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INSTALLATION • Apps génériques
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OS POUR LE DÉVELOPPEMENT DES APPS
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GOOGLE SEARCH: ANDROID jeudi 26 jan
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jeudi 26 janvier 12 PRÉSENCE SUR L
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jeudi 26 janvier 12 CONCLUSION Pré
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• Web apps vs. Android apps jeudi
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jeudi 26 janvier 12 ANDROID: INSTAL
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jeudi 26 janvier 12 INSTALLATION DE
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INSTALLATION DE JAVA SE 6 • http:
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INSTALLATION D’ECLIPSE • http:/
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ANDROID SDK • Présentation • B
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• Présentation PLUGIN ADT • AD
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CONFIGURATION DE ADT • Définisse
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ANDROID VIRTUAL DEVICES (AVDS) •
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LANCEMENT D’UNE APPS SUR jeudi 26
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LANCEMENT DE HELLOANDROID DANS L’
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jeudi 26 janvier 12 HELLO ANDROID
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DÉFINITION DES OPTIONS DU PROJETS
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LANCEMENT DE VOTRE APPS • Fonctio
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LES BASES DE DDMS • Concepts •
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LANCEMENT D’UNE APPS SUR jeudi 26
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VIA L’USB • Prérequis : il fau
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EXPORTER UN PACKAGE • A faire à
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jeudi 26 janvier 12 LANCEMENT DE L
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RÉSUMÉ • Installation des logic
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CONCEPTS DE BASE DE LA PROGRAMMATIO
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jeudi 26 janvier 12 RÉALISER UN PR
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RÉALISER VOTRE PROPRE PROJET ANDRO
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jeudi 26 janvier 12 DÉFINITION DES
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LANCER UNE NOUVELLE APP SUR UN DEVI
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jeudi 26 janvier 12 STRUCTURE D’U
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LES 3 APPROCHES PRINCIPALES • Jav
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APPROCHE XML: SCHÉMA • Java publ
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jeudi 26 janvier 12 LAYOUT JAVA
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jeudi 26 janvier 12 CODE (CORPS) pu
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RÉSULTAT SUR L’ ÉMULATEUR • c
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jeudi 26 janvier 12 LAYOUT XML
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PLUS DE DÉTAILS • res/layout/mai
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RES/LAYOUT/MAIN.XML jeudi 26 j
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} jeudi 26 janvier 12 CODE (JAVA) p
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jeudi 26 janvier 12 ECLIPSE ADT VIS
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jeudi 26 janvier 12 ECLIPSE VISUAL
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• Approches CONCEPTS • Utilisat
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RES/VALUES/STRINGS.XML Say Hello
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• Dans l’émulateur • Click-D
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jeudi 26 janvier 12 PROJECT LAYOUT
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jeudi 26 janvier 12 QUESTIONS?
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RÉSUMÉ DU COURS • Utilisation d
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CONCEPTS • Buts • Changer la co
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RES/LAYOUT/MAIN.XML jeudi 26 janv
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jeudi 26 janvier 12 MAIN ACTIVITY C
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} jeudi 26 janvier 12 EVENT HANDLER
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jeudi 26 janvier 12 RÉSULTATS SUR
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IDÉE • Buts • Changer la coule
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EVENT HANDLER CLASS (PARTIE DE MAIN
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jeudi 26 janvier 12 RÉSULTAT SUR U
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CONCEPT • Buts • Changer la cou
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RES/VALUES/STRINGS.XML Event Hand
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} } jeudi 26 janvier 12 ACTIVITY CL
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jeudi 26 janvier 12 ACTIVITY CLASS
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jeudi 26 janvier 12 RÉSULTATS SUR
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CONCEPT • Buts • Changer la cou
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Page 153 and 154:
jeudi 26 janvier 12 RÉSULTAT SUR L
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jeudi 26 janvier 12 GESTION DES ÉV
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Page 161 and 162:
jeudi 26 janvier 12 RÉSULTAT SUR L
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jeudi 26 janvier 12 COPIE D’UN PR
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jeudi 26 janvier 12 CONCLUSION
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APPROCHES: CONTRÔLE SIMPLE • Sit
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• Buttons RÉSUMÉ DU COURS • I
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WIDGET LECTURES COMBINED IN SINGLE
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SWITCHING ACTIVITIES: SUMMARY • S
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jeudi 26 janvier 12 APPROACH FOR BU
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XML: LAYOUT FILE (RES/LAYOUT/BUTTON
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JAVA (BUTTONACTIVITY.JAVA) public c
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BUTTON • Idea • A push button d
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XML: STRINGS FILE ENTRIES (PART OF
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jeudi 26 janvier 12 Emulator RESULT
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IMAGEBUTTON, VARIATION 1 • Idea
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jeudi 26 janvier 12 RESULTS (EMULAT
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IMAGEBUTTON, VARIATION 2 • Idea
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IMAGE DESCRIPTOR FILE (RES/ DRAWABL
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RADIOBUTTON • Idea • A button f
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FIRST EXAMPLE: EVENT HANDLERS ATTAC
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STRINGS FILE AND JAVA • Nothing n
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jeudi 26 janvier 12 RADIOBUTTON (WI
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XML: LAYOUT FILE ENTRY (PART OF RES
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JAVA (RELEVANT PARTS) public class
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JAVA (RELEVANT PARTS, CONTINUED) }
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jeudi 26 janvier 12 CHECKBOX
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TOGGLEBUTTON • Idea • A button
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JAVA (RELEVANT PARTS, CONTINUED) Th
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jeudi 26 janvier 12 WRAP-UP
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jeudi 26 janvier 12 WIDGETS: SPINNE
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jeudi 26 janvier 12 GENERAL APPROAC
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LAYOUT FILES FOR WIDGET LECTURES
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SWITCHING ACTIVITIES: SUMMARY • S
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SWITCHING ACTIVITIES: WIDGETSINITIA
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jeudi 26 janvier 12 OVERALL WIDGET
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SPINNER WITH PREDEFINED • Idea CH
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ONITEMSELECTEDLISTENER • onItemSe
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JAVA (RELEVANT PARTS, CONTINUED) pr
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jeudi 26 janvier 12 SPINNER APPROAC
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SPINNER (CONTINUED) • Key XML att
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JAVA (RELEVANT PARTS) public class
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SUMMARY • Spinner with fixed entr
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Topics in This Section • LinearLa
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Main Layout Strategies • XML-base
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Commonly Used Attributes • Size -
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Commonly Used Attributes (Continued
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LinearLayout • Idea -Put componen
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Example Details 271 jeudi 26 janvie
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Colors • Idea - Although colors c
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Layout File (res/layouts/ nested_la
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Localization Preview • Idea -You
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Setting Locale Programmatically •
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Localized Color File (res/values-qq
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Results 287 jeudi 26 janvier 12 Loc
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Using android:layout_weight • Ide
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Java Code public class LayoutWeight
Page 293 and 294: jeudi 26 janvier 12 RelativeLayout
Page 295 and 296: Referring to Existing IDs • First
Page 297 and 298: Example Details 297 jeudi 26 janvie
Page 299 and 300: jeudi 26 janvier 12 TableLayout ©
Page 301 and 302: TableRow • Idea - Goes inside Tab
Page 307 and 308: Hierarchy Viewer • Idea -The Andr
Page 309 and 310: jeudi 26 janvier 12 Wrap-Up © 2011
Page 311 and 312: More Reading • Tutorial: Declarin
Page 313 and 314: jeudi 26 janvier 12 © 2011 Marty H
Page 315 and 316: jeudi 26 janvier 12 Overview © 201
Page 317 and 318: Pros and Cons of Following Conventi
Page 319 and 320: Indentation: blocks that are nested
Page 321 and 322: Break Things into Small Pieces •
Page 323 and 324: Use JavaDoc • Use JavaDoc from th
Page 325 and 326: Use Other Standard Annotations when
Page 327 and 328: Initialize Local Variables when Dec
Page 329 and 330: Use TODO Comments for Temporary Cod
Page 333 and 334: Indent 4 Spaces for Blocks • Inde
Page 335 and 336: Fully Qualify Imports • List each
Page 337 and 338: Start JavaDoc Comments with 3 rd Pe
Page 339 and 340: Start Instance Variables with “m
Page 341 and 342: Never Ignore Exceptions • Avoid e
Page 343: Why Ignoring Exceptions Rule is Too
Page 347 and 348: Summary • Strictly follow convent
Page 349 and 350: Topics in This Section • Part I -
Page 351 and 352: Idea • Android philosophy -Activi
Page 355 and 356: Summary of Layout 355 jeudi 26 janv
Page 357 and 358: XML: Layout File: Divider (res/layo
Page 359 and 360: XML: Colors File (res/values/colors
Page 361 and 362: Java (LoanCalculatorActivity.java)
Page 363 and 364: Java (PaymentInfo.java) public clas
Page 365 and 366: Example: Results 365 jeudi 26 janvi
Page 367 and 368: Summary • Idea - Specify class na
Page 369 and 370: Example: Overview • Initial Activ
Page 371 and 372: XML: Manifest File Template (Androi
Page 373 and 374: XML: Strings File (res/values/strin
Page 377 and 378: Summary • Idea - Attach a Bundle
Page 379 and 380: Option 1: Attaching Entire Bundle t
Page 383 and 384: XML: Layout File (res/layout/main.x
Page 385 and 386: Java (IntentFilter1Activity.java) p
Page 387 and 388: Java (LoanBundler.java, Continued)
Page 389 and 390: Java (LoanCalculatorActivity, Conti
Page 393 and 394: More Reading • Tutorial: Intents
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jeudi 26 janvier 12 Intents, Intent
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jeudi 26 janvier 12 Overview © 201
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jeudi 26 janvier 12 Invoking Activi
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Registering to Handle URIs • Matc
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jeudi 26 janvier 12 © 2011 Marty H
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XML: Layout File (res/layout/main.x
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Java (IntentFilter2Activity.java) p
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Example: Results 409 jeudi 26 janvi
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Summary • Idea - Embed query para
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XML: Layout File (res/layout/main.x
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XML: Manifest File Action Declarati
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Java (IntentFilter2Activity, Contin
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Java (LoanCalculatorActivity, Conti
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Java (LoanCalculatorActivity, Conti
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jeudi 26 janvier 12 Wrap-Up © 2011
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jeudi 26 janvier 12 Intents, Intent
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Using TabActivity: Outline public c
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Option 1: A Single Image • Pros -
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XML Code for Dual-Image Icon
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Example: Overview • Initial Activ
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XML: Manifest File Action Declarati
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Java (TabbedActivity: Tab 2) 443 je
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Example: Results 445 jeudi 26 janvi
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Summary • Java (extends TabActivi
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Topics in This Section • Localiza
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Big Idea • Good news - Android’
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jeudi 26 janvier 12 Language © 201
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Steps • Make multiple folders wit
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How User Changes Device Language
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Example: The Android Resort • Ide
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Strings File: Spanish (res/values-e
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Manifest File (No Language-Based Ve
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Project Layout 466 jeudi 26 janvier
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Results: Spanish 468 jeudi 26 janvi
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Graphical Layout Editor in Eclipse
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Changing the Language Programmatica
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Idea • Values can be specific to
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Page 478 and 479:
Strings File: General Spanish (res/
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Project Layout 480 jeudi 26 janvier
Page 482 and 483:
jeudi 26 janvier 12 Screen Orientat
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Steps • Make two folders: default
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Precedence of Folder Names • Idea
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Layout File: Landscape Mode (res/la
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Dimensions File: Landscape (res/val
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Results: English (Really Non-Spanis
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Results: Mexican Spanish 496 jeudi
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Example: Screen from Widgets Lectur
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jeudi 26 janvier 12 Display Resolut
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Common Approaches • Alternative 1
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Best Practices • For small icons
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Page 508 and 509:
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More Reading • Developer’s Guid
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jeudi 26 janvier 12 Handling Screen
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Page 516 and 517:
Reminder: Preventing Screen Rotatio
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Summary: Saving Data • Override o
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The Bundle Class: Details • Putti
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Loan Payment Comparisons • Idea -
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Page 526 and 527:
Core Java Code public class Rotatio
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Core Java Code (Continued) 528 jeud
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Java Code: Saving State 530 jeudi 2
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Java Code: PaymentInfo public class
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Page 536 and 537:
Lifecycle Summary onSaveInstanceSta
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More Reading • JavaDoc: Activity
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jeudi 26 janvier 12 Network Program
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Page 544 and 545:
jeudi 26 janvier 12 Socket Basics
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Steps for Implementing a Client (Co
Page 548 and 549:
Helper Class: SocketUtils • Idea
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jeudi 26 janvier 12 Example: NIST T
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Manifest File (AndroidManifest.xml)
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Values Files • res/values/strings
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} Main Activity, Continued (NistTim
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jeudi 26 janvier 12 Aside: String F
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Formatted Output: printf • Takes
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Controlling Formatting • Differen
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Printf Example: Controlling Width a
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Parsing Strings Using StringTokeniz
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Interactive Tokenizer: Example impo
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Parsing Strings using the split met
Page 572 and 573:
Interactive Tokenizer: Example publ
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Page 576 and 577:
Example Welcome Messages • ftp.mi
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Manifest File (AndroidManifest.xml)
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Page 582 and 583:
Main Activity (FtpMessageActivity.j
Page 584 and 585:
} Main Activity, Continued (FtpMess
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Page 588 and 589:
HTTP Request/Response: GET • Requ
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Using Telnet to Test Server Command
Page 592 and 593:
Example: Larry Ellison’s Home Pag
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Layout File: Portrait Mode (res/lay
Page 596 and 597:
Values Files • res/values/strings
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Main Activity, Continued (UrlChecke
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Main Activity, Continued (UrlChecke
Page 602 and 603:
Helper Classes • StatusLineParser
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Page 606 and 607:
Summary • Basics - Socket socket
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Topics in This Section • Part I (
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Big Idea • Many ways to communica
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URL and HttpURLConnection: Overview
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Simple URL Methods: Example import
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HttpURLConnection: Details • Gett
Page 618 and 619:
URL Searcher • Idea -Print out al
Page 620 and 621:
Layout File (res/layout/ url_search
Page 622 and 623:
Main Activity (UrlSearcher1Activity
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Main Activity, Continued (UrlSearch
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Main Activity, Continued (UrlSearch
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Results 628 jeudi 26 janvier 12
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HttpClient • Idea -A popular clas
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HttpClient: Reading Result of POST
Page 634 and 635:
HttpUtils 634 jeudi 26 janvier 12 p
Page 636 and 637:
Page 638 and 639:
XML Files • AndroidManifest.xml -
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} Main Activity, Continued (UrlSear
Page 642 and 643:
jeudi 26 janvier 12 Aside: JSON For
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JSON: Example in JavaScript var per
Page 646 and 647:
Popular Web Services that Send JSON
Page 648 and 649:
JSONObject • Idea -A popular JSON
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Extracting Data From a JSONObject
Page 652 and 653:
jeudi 26 janvier 12 Using JSONObjec
Page 654 and 655:
JSONObject’s Algorithm for JSONif
Page 656 and 657:
Bean Properties: Examples Method Na
Page 658 and 659:
Drawbacks of JSONification • Send
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JSONObject from Bean: Example Resul
Page 662 and 663:
JSON-Based Loan Calculator Service
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Servlet, Continued 664 jeudi 26 jan
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Android Activity, Continued 666 jeu
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Results 668 jeudi 26 janvier 12 htt
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Double Translate App • Idea - The
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Main Activity, Continued 672 jeudi
Page 674 and 675:
Key Helper Class (TranslationUtils)
Page 676 and 677:
Results: Medium-Difficulty Text 676
Page 678 and 679:
Results: More Deliberately-Tricky T
Page 680 and 681:
More Reading • JavaDoc -HttpURLCo
Page 682 and 683:
jeudi 26 janvier 12 Multithreaded P
Page 684 and 685:
684 jeudi 26 janvier 12 Overview ©
Page 686 and 687:
Steps for Concurrent Programming
Page 688 and 689:
Thread Mechanism One: Separate Runn
Page 690 and 691:
Thread Mechanism One: Example publi
Page 692 and 693:
Helper Class public class ThreadUti
Page 694 and 695:
Pros and Cons of Approach • Advan
Page 696 and 697:
Review of Interfaces: Syntax • Sh
Page 698 and 699:
Thread Mechanism Two: Main App Impl
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Thread Mechanism Two: Example publi
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Page 704 and 705:
Review of Inner Classes • Class c
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Inner Class Implements Runnable: Te
Page 708 and 709:
} Thread Mechanism Three: Example (
Page 710 and 711:
Page 712 and 713:
Pros and Cons • Separate class th
Page 714 and 715:
Race Conditions • Idea - You writ
Page 716 and 717:
} Race Conditions: Example (Continu
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Race Conditions: Solution? • Do t
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Arbitrating Contention for Shared R
Page 722 and 723:
722 jeudi 26 janvier 12 © 2011 Mar
Page 724 and 725:
Methods in ExecutorService Class
Page 726 and 727:
Lower-Level Threading • Use Threa
Page 728 and 729:
Types of Task Queues • Executors.
Page 730 and 731:
Nasty Synchronization Bug public cl
Page 732 and 733:
Synchronization Solution (Continued
Page 734 and 735:
Other Advanced Topics • wait/wait
Page 736 and 737:
More Reading • Books -Java Concur
Page 738 and 739:
Page 740 and 741:
740 jeudi 26 janvier 12 Overview ©
Page 742 and 743:
Nonresponsive GUI Controls • Prob
Page 744 and 745:
jeudi 26 janvier 12 Updating UI Aft
Page 746 and 747:
Example: Multi-URL Validator • Id
Page 748 and 749:
Main Activity: Setup Code (Continue
Page 750 and 751:
Main Activity: Button Handler (Afte
Page 752 and 753:
Main Activity: Helper Methods 752 j
Page 754 and 755:
Page 756 and 757:
Displaying a Network Image • Idea
Page 758 and 759:
Making a View for an Image • Idea
Page 760 and 761:
Example: Unthreaded Image Viewer
Page 762 and 763:
Page 764 and 765:
View.post • Scenario -Total wait
Page 766 and 767:
Main Activity: Setup Code public cl
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Main Activity: Runnable Inner Class
Page 770 and 771:
Page 772 and 773:
AsyncTask • Scenario - Total wait
Page 774 and 775:
AsyncTask Details: Constructor •
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AsyncTask Details: doPostExecute
Page 778 and 779:
Example: Multithreaded Image Viewer
Page 780 and 781:
Page 782 and 783:
More Reading • JavaDoc -AsyncTask
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David Defour - Université de Perpignan

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