Android Boot Camp for Developers Using Java, Comprehensive: A Beginner’s Guide to Creating Your First Android Apps

516 Pages·79.976 MB·English

by  Hoisington C.

™
ANDROID BOOT CAMP FOR
™
DEVELOPERS USING JAVA ,
COMPREHENSIVE:
’
A BEGINNER S GUIDE TO
CREATING YOUR FIRST
ANDROID APPS
CORINNE HOISINGTON
Australia (cid:129) Brazil (cid:129) Japan (cid:129) Korea (cid:129) Mexico (cid:129) Singapore (cid:129) Spain (cid:129) United Kingdom (cid:129) United States
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Brief Contents
iii
Preface . . . . . . . . . . . . . . . . . . xiii
CHAPTER 1 Voilà! Meet the Android . . . . . . . . . . . . 1
CHAPTER 2 Simplify! The Android User Interface . . . . . 31
CHAPTER 3 Engage! Android User Input, Variables,
and Operations . . . . . . . . . . . . . . . 69
CHAPTER 4 Explore! Icons and Decision-Making Controls . . . 109
CHAPTER 5 Investigate! Android Lists, Arrays,
and Web Browsers . . . . . . . . . . . . . 145
CHAPTER 6 Jam! Implementing Audio in Android Apps . . 187
CHAPTER 7 Reveal! Displaying Pictures in a Gallery . . . 225
CHAPTER 8 Design! Using a DatePicker on a Tablet . . . 259
CHAPTER 9 Customize! Navigating with Tabs on a
Tablet App . . . . . . . . . . . . . . . . 301
CHAPTER 10 Move! Creating Animation . . . . . . . . . 343
CHAPTER 11 Discover! Incorporating Google Maps . . . . 383
CHAPTER 12 Finale! Publishing Your Android App . . . . . 429
Glossary . . . . . . . . . . . . . . . . . 457
Index . . . . . . . . . . . . . . . . . . . 465
Copyright 2012 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has
deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
Contents
iv
Preface . . . . . . . . . . . . . . . . . . . . . . . xiii
CHAPTER 1 Voilà! Meet the Android . . . . . . . . . . . . . . . . 1
MeettheAndroid . . . . . . . . . . . . . . . . . . . . . . . . . . 2
AndroidPhoneDevice . . . . . . . . . . . . . . . . . . . . . . . 3
FeaturesoftheAndroid . . . . . . . . . . . . . . . . . . . . . . 5
WritingAndroidApps . . . . . . . . . . . . . . . . . . . . . . . 6
AndroidEmulator . . . . . . . . . . . . . . . . . . . . . . . . . 7
GettingOrientedwithMarketDeployment . . . . . . . . . . . . . . . 8
FirstVentureintotheAndroidWorld . . . . . . . . . . . . . . . . . . 9
OpeningEclipsetoCreateaNewProject . . . . . . . . . . . . . . . 9
CreatingtheHelloWorldProject . . . . . . . . . . . . . . . . . . .10
BuildingtheUserInterface . . . . . . . . . . . . . . . . . . . . .13
TakingaTourofthePackageExplorer . . . . . . . . . . . . . . . .14
DesigningtheUserInterfaceLayout . . . . . . . . . . . . . . . . .15
AddingaFormWidgettotheUserInterfaceLayout . . . . . . . . . . .17
TestingtheApplicationintheEmulator . . . . . . . . . . . . . . . .20
OpeningaSavedAppinEclipse . . . . . . . . . . . . . . . . . . .24
WrapItUp—ChapterSummary . . . . . . . . . . . . . . . . . . . .26
KeyTerms . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
DeveloperFAQs . . . . . . . . . . . . . . . . . . . . . . . . . . .27
BeyondtheBook . . . . . . . . . . . . . . . . . . . . . . . . . .28
CaseProgrammingProjects . . . . . . . . . . . . . . . . . . . . .28
CaseProject
QuoteoftheDayApp . . . . . . . . . . . . . . . . . . . . . .29
CaseProject
AndroidTerminologyApp . . . . . . . . . . . . . . . . . . . .30
CaseProject
BusinessCardApp . . . . . . . . . . . . . . . . . . . . . . .30
CHAPTER 2 Simplify! The Android User Interface . . . . . . . . . . 31
DesigninganAndroidApp . . . . . . . . . . . . . . . . . . . . . .32
TheBigPicture . . . . . . . . . . . . . . . . . . . . . . . . . .33
UsingtheAndroidUserInterface . . . . . . . . . . . . . . . . . . .33
LinearLayoutsandRelativeLayouts . . . . . . . . . . . . . . . . .35
DesigningtheHealthyRecipesOpeningUserInterface . . . . . . . . .37
AndroidTextProperties . . . . . . . . . . . . . . . . . . . . . .38
AddingaFiletotheResourcesFolder . . . . . . . . . . . . . . . .40
AddinganImageViewControl . . . . . . . . . . . . . . . . . . . .42
Copyright 2012 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has
deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
AddingaButtonControl . . . . . . . . . . . . . . . . . . . . . .43
PlanningaProgram . . . . . . . . . . . . . . . . . . . . . . . .44
CreatingActivities . . . . . . . . . . . . . . . . . . . . . . . . . .45
CreatinganXMLLayoutFile . . . . . . . . . . . . . . . . . . . .45
AddingaClassFile . . . . . . . . . . . . . . . . . . . . . . . .47
TheAndroidManifestFile . . . . . . . . . . . . . . . . . . . . . . .50 v
AddinganActivitytotheAndroidManifest . . . . . . . . . . . . . . .50
CodingtheJavaActivity . . . . . . . . . . . . . . . . . . . . . . .53
CodinganonCreateMethod . . . . . . . . . . . . . . . . . . . .53
DisplayingtheUserInterface . . . . . . . . . . . . . . . . . . . .54
CreatingaButtonEventHandler . . . . . . . . . . . . . . . . . . .56
CodingaButtonEventHandler . . . . . . . . . . . . . . . . . . .58
CorrectingErrorsinCode . . . . . . . . . . . . . . . . . . . . .60
SavingandRunningtheApplication . . . . . . . . . . . . . . . . .61
WrapItUp—ChapterSummary . . . . . . . . . . . . . . . . . . . .61
KeyTerms . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
DeveloperFAQs . . . . . . . . . . . . . . . . . . . . . . . . . . .63
BeyondtheBook . . . . . . . . . . . . . . . . . . . . . . . . . .64
CaseProgrammingProjects . . . . . . . . . . . . . . . . . . . . .64
CaseProject
RentalPropertyApp . . . . . . . . . . . . . . . . . . . . . . .65
CaseProject
StarConstellationApp . . . . . . . . . . . . . . . . . . . . . .66
CaseProject
YourSchoolApp . . . . . . . . . . . . . . . . . . . . . . . .67
CaseProject
HostelAppforTravel . . . . . . . . . . . . . . . . . . . . . .67
CaseProject
YourContactsApp–AddressBook . . . . . . . . . . . . . . . .68
CaseProject
LatestNewsApp . . . . . . . . . . . . . . . . . . . . . . . .68
CHAPTER 3 Engage! Android User Input, Variables, and Operations . . 69
AndroidThemes . . . . . . . . . . . . . . . . . . . . . . . . . .71
PreviewingaTheme . . . . . . . . . . . . . . . . . . . . . . . .72
CodingaThemeintheAndroidManifestFile . . . . . . . . . . . . .74
SimplifyingUserInput . . . . . . . . . . . . . . . . . . . . . . . .76
AndroidTextFields . . . . . . . . . . . . . . . . . . . . . . . .76
AddingaTextField . . . . . . . . . . . . . . . . . . . . . . . .78
SettingtheHintPropertyfortheTextField . . . . . . . . . . . . . .79
CodingtheEditTextClassfortheTextField . . . . . . . . . . . . . .80
AndroidSpinnerControl . . . . . . . . . . . . . . . . . . . . . .81
AddingaSpinnerControlwithStringArrayEntries . . . . . . . . . . .85
CodingtheSpinnerControl . . . . . . . . . . . . . . . . . . . . .86
AddingtheButton,TextView,andImageViewControls . . . . . . . . .87
DeclaringVariables . . . . . . . . . . . . . . . . . . . . . . . . .92
PrimitiveDataTypes . . . . . . . . . . . . . . . . . . . . . . . .93
StringDataType . . . . . . . . . . . . . . . . . . . . . . . . .94
Copyright 2012 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has
deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
CONTENTS
DeclaringtheVariables . . . . . . . . . . . . . . . . . . . . . . .94
GetText()Method . . . . . . . . . . . . . . . . . . . . . . . . .95
WorkingwithMathematicalOperations . . . . . . . . . . . . . . . . .96
ArithmeticOperators . . . . . . . . . . . . . . . . . . . . . . . .96
FormattingNumbers . . . . . . . . . . . . . . . . . . . . . . . .97
vi DisplayingAndroidOutput . . . . . . . . . . . . . . . . . . . . . .98
GetSelectedItem()Method . . . . . . . . . . . . . . . . . . . . .98
SetText()Method . . . . . . . . . . . . . . . . . . . . . . . . .99
WrapItUp—ChapterSummary . . . . . . . . . . . . . . . . . . . 100
KeyTerms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
DeveloperFAQs . . . . . . . . . . . . . . . . . . . . . . . . . . 102
BeyondtheBook . . . . . . . . . . . . . . . . . . . . . . . . . 104
CaseProgrammingProjects . . . . . . . . . . . . . . . . . . . . 104
CaseProject
StudyAbroadApp . . . . . . . . . . . . . . . . . . . . . . . 104
CaseProject
TuitionApp . . . . . . . . . . . . . . . . . . . . . . . . . . 105
CaseProject
NewYorkCityCabFareApp . . . . . . . . . . . . . . . . . . 106
CaseProject
PaintCalculatorApp . . . . . . . . . . . . . . . . . . . . . . 107
CaseProject
SplittheBillApp . . . . . . . . . . . . . . . . . . . . . . . 107
CaseProject
PiggyBankChildren’sApp . . . . . . . . . . . . . . . . . . . 108
CHAPTER 4 Explore! Icons and Decision-Making Controls . . . . . 109
TheLauncherIcon . . . . . . . . . . . . . . . . . . . . . . . . . 112
CustomizingaLauncherIcon . . . . . . . . . . . . . . . . . . . 114
RadioButtonandRadioGroupControls . . . . . . . . . . . . . . . . 116
ChangingtheTextColorofAndroidControls . . . . . . . . . . . . 117
ChangingtheLayoutGravity . . . . . . . . . . . . . . . . . . . 117
ChangingtheMargins . . . . . . . . . . . . . . . . . . . . . . 118
AddingtheRadioButtonGroup . . . . . . . . . . . . . . . . . . 119
CodingaRadioButtonControl . . . . . . . . . . . . . . . . . . . 121
CompletingtheUserInterface . . . . . . . . . . . . . . . . . . . 123
MakingDecisionswithConditionalStatements . . . . . . . . . . . . . 125
UsinganIfStatement . . . . . . . . . . . . . . . . . . . . . . 125
UsingIfElseStatements . . . . . . . . . . . . . . . . . . . . . 126
RelationalOperators . . . . . . . . . . . . . . . . . . . . . . . 126
LogicalOperators . . . . . . . . . . . . . . . . . . . . . . . . 128
DataValidation . . . . . . . . . . . . . . . . . . . . . . . . . 129
ToastNotification . . . . . . . . . . . . . . . . . . . . . . . . 129
UsingtheisChecked()MethodofRadioButtonControls . . . . . . . . 130
NestedIfStatements . . . . . . . . . . . . . . . . . . . . . . 130
CodingtheButtonEvent . . . . . . . . . . . . . . . . . . . . . 131
CodingtheNestedIfStatements . . . . . . . . . . . . . . . . . 131
Copyright 2012 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has
deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.