book

Native Mobile Development

by Shaun Lewis, Mike Dunn

November 2019

Intermediate to advanced

394 pages

9h 44m

English

O'Reilly Media, Inc.

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Why We Wrote This BookWho This Book Is ForHow This Book Is OrganizedConventions Used in This BookUsing Code ExamplesO’Reilly Online LearningHow to Contact UsAcknowledgments
A Note About the State of Mobile Development
TasksAndroidHow to Create Your App’s Starting UI ControllerHow to Change the Active UI ControllerUnderstanding the UI Controller Life CycleiOSHow to Create Your App’s Starting UI ControllerHow to Change the Active UI ControllerUnderstanding the Controller Life CycleWhat We’ve Learned
TasksAndroidCreate a New ViewNesting ViewsUpdate a View’s StateiOSCreate a New ViewNesting ViewsInterface Builder to the RescueUpdate a View’s StateModifying PositionWhat We’ve Learned
TasksAndroidHow to Create a Custom ViewHow to Use a Custom ViewiOSHow to Create a Custom ViewHow to Use a Custom ViewWhat We’ve Learned
TasksAndroidReceive and React to a TapReceive and React to Keyboard InputHandle Compound GesturesiOSReceive and React to a TapReceive and React to Keyboard InputHandle Compound GesturesWhat We’ve Learned
TasksAndroidUse a Callback to React to an OperationDispatch a Message to Any Interested SubscribersListen for, and React to, Messages Dispatched Within a SystemiOSUse a Callback to React to an OperationDispatch a Message to Any Interested SubscribersListen for, and React to, Messages Dispatched Within a SystemClosures Instead of SelectorsStop Listening for NotificationsWhat We’ve Learned
TasksAndroidGet Properties from the File Like Size or Last Modified DateRead and Write Data to and from a FileCopy Data from One File to AnotheriOSGet Properties from the File Like Size or Last Modified DateReading and Writing Data to and from a FileCopy Data from One File to AnotherWhat We’ve Learned
TasksAndroidEstablish a Database ConnectionCreate a Database Table or Persistent ObjectWrite Data to That Table or Persistent ObjectRead Data from That Table or Persistent ObjectiOSSet Up and Connect to a Persistence LayerDefine and Create a Database Table or Persistent ObjectWrite and Persist Data to SQLiteRead Data from SQLiteWhat We’ve Learned
TasksAndroidPerform a Task in a Background ThreadAct on the Results of Work Performed in the Background Thread on the Main ThreadTerminating a ThreadiOSPerform a Task in a Background ThreadAct on the Results of Work Performed in the Background Thread on the Main ThreadWhat We’ve Learned

TasksAndroidRead and Print a Text File on a Remote ServerMake an HTTP POST RequestDownload a Binary FileiOSRead and Print a Text File on a Remote ServerMake an HTTP POST RequestDownload a Binary FileWhat We’ve Learned
TasksAndroidUse Framework-Provided Tools to Show the User FeedbackSnackbarUpdate the Status BariOSUse Framework-Provided Tools to Show the User FeedbackUpdate the Status BarWhat We’ve Learned
TasksAndroidWrite User PreferencesRead User PreferencesWork with User Preferences in a Multiple User ApplicationiOSWrite User PreferencesRead User PreferencesWork with User Preferences in a Multiple User ApplicationWhat We’ve Learned
TasksAndroidSerialize and Deserialize an Object InstanceiOSSerialize and Deserialize an Object InstanceiOS NotesWhat We’ve Learned
TasksAndroidAdd Functionality to Existing APIsiOSAdd Functionality to Existing APIsWhat We’ve Learned
TasksAndroidSet Up and Run Unit TestsSet Up and Run Integration TestsiOSSet Up and Run Unit TestsWhat We’ve Learned
Comparing Native Development to Cross-Platform ToolsWeb-BasedOtherEnvironment SetupAndroid SetupiOS SetupWhat We’ve Learned
Creating a New ProjectAndroid StudioXcodeApp ArchitectureBuilding Our First ScreenAndroidiOSWhat We’ve Learned
Sprucing Up ViewsAndroidiOSAdding a ButtoniOSLists, Lists, and More Lists!Add a New Catalog ViewWiring Up the ButtonBooksPopulating the List ViewAndroidiOSWhat We’ve Learned
Dynamic Data in List ViewsAndroidiOSIt’s Time for Our Model Objects to Get RealJSON for One, JSON for AllSwitch the Model Layer to JSONAndroidiOSWhat We’ve Learned
Detailing Our BooksAndroidiOSSaving Books for LaterAndroidiOSStoring Books for LaterAndroidiOSSaving BooksAndroidWhat We’ve Learned
Searching the WorldAndroidiOSBuilding a Search EndpointInstalling Node and ExpressLocations JSON FileCalling Our ServiceAndroidiOSWhat We’ve Learned

Content preview from Native Mobile Development

Chapter 2. Views

In most graphical UI (GUI) frameworks, visual elements on the screen are represented by objects generally called “views” in architectural parlance. In web applications, a view might be an HTML element, but in some web frameworks a view is an entire web page, or a fragment of a page. Java Swing, and a number of other frameworks, use “components” to represent the view portion of the application.

In native mobile development, a view is exactly that—an instance of a View (Android) or UIView (iOS) subclass.

Views can be atomic elements and represent a single visual element on a screen, like a piece of text or an image, but might also be a more complicated hierarchy of views for layout, like a list of rows, or even more sophisticated, like a calendar widget with significant, sophisticated behavior built into the view itself.

Views are also necessary to receive user input. Buttons, switches and toggles, checkboxes, select boxes, and text inputs are all examples of views that enable your user to interact with your app.

Tasks

In this chapter, you’ll learn to:

Create a new view.
Nest views.
Update a view’s state.

Android

In Android, the base class is View, and it is not abstract—you can instantiate a simple View where needed, although it may not be that common. One example is that sometimes simple View instances are used as lines or shapes, by simply providing dimensions and a background color, or as hit areas without visual representation. Some common examples ...