David Defour - Université de Perpignan

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Why Ignoring Exceptions Rule is Too Strict • Can make shorter co<strong>de</strong> with same safety 342 jeudi 26 janvier 12 –Android style int n; try { n = Integer.parseInt(…); } catch(NumberFormatException nfe) { n = 10; } –Shorter style if you could ignore exceptions int n = 10; try { n = Integer.parseInt(…); } catch(NumberFormatException nfe) { }
Why Ignoring Exceptions Rule is Too Strict (Continued) • Sometimes there is nothing to be done try { Thread.sleep(…); } catch(InterruptedException ie) { // What could you do here? } doSomethingAfterThePause(); 343 jeudi 26 janvier 12
Page 1 and 2:
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
Page 17 and 18:
AVANTAGES DES APPLI WEB • Accès
Page 19 and 20:
AVANTAGES DES APPLI MOBILES • Plu
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INCONVÉNIENTS DES APPS • Pas d
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INSTALLATION • Apps génériques
Page 25 and 26:
OS POUR LE DÉVELOPPEMENT DES APPS
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GOOGLE SEARCH: ANDROID jeudi 26 jan
Page 29 and 30:
jeudi 26 janvier 12 PRÉSENCE SUR L
Page 31 and 32:
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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Page 123 and 124:
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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Page 135 and 136:
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 159 and 160:
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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Page 191 and 192:
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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Page 199 and 200:
Page 201 and 202:
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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Page 247 and 248:
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
Page 291 and 292: 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: Never Ignore Exceptions • Avoid e
Page 345 and 346: Why Generic Exception Rule is (Argu
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
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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
Page 468 and 469:
Results: Spanish 468 jeudi 26 janvi
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Graphical Layout Editor in Eclipse
Page 472 and 473:
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:
Page 510 and 511:
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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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
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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
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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
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Helper Classes • StatusLineParser
Page 604 and 605:
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
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URL Searcher • Idea -Print out al
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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
Page 628 and 629:
Results 628 jeudi 26 janvier 12
Page 630 and 631:
HttpClient • Idea -A popular clas
Page 632 and 633:
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
Page 644 and 645:
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
Page 650 and 651:
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
Page 660 and 661:
JSONObject from Bean: Example Resul
Page 662 and 663:
JSON-Based Loan Calculator Service
Page 664 and 665:
Servlet, Continued 664 jeudi 26 jan
Page 666 and 667:
Android Activity, Continued 666 jeu
Page 668 and 669:
Results 668 jeudi 26 janvier 12 htt
Page 670 and 671:
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
Page 702 and 703:
Page 704 and 705:
Review of Inner Classes • Class c
Page 706 and 707:
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
Page 718 and 719:
Race Conditions: Solution? • Do t
Page 720 and 721:
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
Page 768 and 769:
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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