;Authors of Head First Android Development;How to Use This Book: Intro; Who is this book for?; We know what you''re thinking; We know what your brain is thinking; Metacognition: thinking about thinking; Here''s what WE did:; Here''s what YOU can do to bend your brain into submission; Read me; The technical review team; Acknowledgments; Safari® Books Online;Chapter 1: Getting Started: Diving In; 1.1 Welcome to Androidville; 1.2 The Android platform dissected; 1.3 Here''s what we''re going to do; 1.4 Your development environment; 1.5 Install Java; 1.6 Build a basic app; 1.7 Let''s build the basic app; 1.

8 Activities and layouts from 50,000 feet; 1.9 Building a basic app (continued); 1.10 Building a basic app (continued); 1.11 You''ve just created your first Android app; 1.12 Android Studio creates a complete folder structure for you; 1.13 Useful files in your project; 1.14 Edit code with the Android Studio editors; 1.15 Run the app in the Android emulator; 1.

16 Creating an Android Virtual Device; 1.17 Run the app in the emulator; 1.18 You can watch progress in the console; 1.19 Test drive; 1.20 What just happened?; 1.21 Refining the app; 1.22 What''s in the layout?; 1.23 activity_main.

xml has two elements; 1.24 The layout file contains a reference to a string, not the string itself; 1.25 Let''s look in the strings.xml file; 1.26 Take the app for a test drive; 1.27 Your Android Toolbox;Chapter 2: Building Interactive Apps: Apps That Do Something; 2.1 You''re going to build a Beer Adviser app; 2.2 Here''s what you need to do; 2.

3 Create the project; 2.4 We''ve created a default activity and layout; 2.5 Adding components with the design editor; 2.6 activity_find_beer.xml has a new button; 2.7 A closer look at the layout code; 2.8 Changes to the XML.; 2.

9 .are reflected in the design editor; 2.10 Use string resources rather than hardcoding the text; 2.11 Change the layout to use the string resources; 2.12 Let''s take the app for a test drive; 2.13 Add values to the spinner; 2.14 Get the spinner to reference a string-array; 2.15 Test drive the spinner; 2.

16 We need to make the button do something; 2.17 Make the button call a method; 2.18 What activity code looks like; 2.19 Add an onClickFindBeer() method to the activity; 2.20 onClickFindBeer() needs to do something; 2.21 Once you have a View, you can access its methods; 2.22 Update the activity code; 2.23 The first version of the activity; 2.

24 What the code does; 2.25 Test drive the changes; 2.26 Building the custom Java class; 2.27 Enhance the activity to call the custom Java class so that we can get REAL advice; 2.28 Activity code version 2; 2.29 What happens when you run the code; 2.30 Test drive your app; 2.31 Your Android Toolbox;Chapter 3: Multiple Activities and Intents: State Your Intent; 3.

1 Apps can contain more than one activity; 3.2 Here''s the app structure; 3.3 Create the project; 3.4 Update the layout; 3.5 Update strings.xml.; 3.6 Create the second activity and layout; 3.

7 What just happened?; 3.8 Welcome to the Android manifest file; 3.9 Every activity needs to be declared; 3.10 An intent is a type of message; 3.11 Use an intent to start the second activity; 3.12 What happens when you run the app; 3.13 The story continues.; 3.

14 Test drive the app; 3.15 Pass text to a second activity; 3.16 Update the text view properties; 3.17 putExtra() puts extra information in an intent; 3.18 Update the CreateMessageActivity code; 3.19 Get ReceiveMessageActivity to use the information in the intent; 3.20 What happens when the user clicks the Send Message button; 3.21 Test drive the app; 3.

22 We can change the app to send messages to other people; 3.23 How Android apps work; 3.24 But we don''t know what apps are on the device; 3.25 Create an intent that specifies an action; 3.26 Change the intent to use an action; 3.27 What happens when the code runs; 3.28 The story continues.; 3.

29 The intent filter tells Android which activities can handle which actions; 3.30 How Android uses the intent filter; 3.31 You need to run your app on a REAL device; 3.32 Test drive the app; 3.33 What if you ALWAYS want your users to choose an activity?; 3.34 What happens when you call createChooser(); 3.35 The story continues.; 3.

36 Change the code to create a chooser; 3.37 Test drive the app; 3.38 If you have NO matching activities; 3.39 Your Android Toolbox;Chapter 4: The Activity Lifecycle: Being an Activity; 4.1 How do activities really work?; 4.2 The Stopwatch app; 4.3 The stopwatch layout code; 4.4 How the activity code will work; 4.

5 Add code for the buttons; 4.6 The runTimer() method; 4.7 Handlers allow you to schedule code; 4.8 The full runTimer() code; 4.9 The full StopwatchActivity code; 4.10 What happens when you run the app; 4.11 The story continues; 4.12 Test drive the app; 4.

13 What just happened?; 4.14 Rotating the screen changes the device configuration; 4.15 From birth to death: the states of an activity; 4.16 The activity lifecycle: from create to destroy; 4.17 Your activity inherits the lifecycle methods; 4.18 How do we deal with configuration changes?; 4.19 Or save the current state.; 4.

20 .then restore the state in onCreate(); 4.21 What happens when you run the app; 4.22 The story continues; 4.23 Test drive the app; 4.24 There''s more to an activity''s life than create and destroy; 4.25 The activity lifecycle: the visible lifetime; 4.26 We need to implement two more lifecycle methods; 4.

27 The updated StopwatchActivity code; 4.28 What happens when you run the app; 4.29 Test drive the app; 4.30 But what if an app is only partially visible?; 4.31 The activity lifecycle: the foreground lifetime; 4.32 Stop the stopwatch if the activity''s paused; 4.33 What happens when you run the app; 4.34 Test drive the app; 4.

35 The complete activity code; 4.36 Your handy guide to the lifecycle methods; 4.37 Your Android Toolbox;Chapter 5: The User Interface: Enjoy the View; 5.1 Your user interface is made up of layouts and GUI components; 5.2 Three key layouts: relative, linear, and grid; 5.3 RelativeLayout displays views in relative positions; 5.4 Adding padding; 5.5 Positioning views relative to the parent layout; 5.

6 Attributes for positioning views relative to the parent layout; 5.7 Positioning views relative to other views; 5.8 Attributes for positioning views relative to other views; 5.9 Use margins to add distance between views; 5.10 RelativeLayout: a summary; 5.11 LinearLayout displays views in a single row or column; 5.12 A linear layout displays views in the order they appear in the layout XML; 5.13 Let''s change up a basic linear layout; 5.

14 Here''s the starting point for the linear layout; 5.15 Make a view streeeeetch by adding weight; 5.16 Adding weight to one view; 5.17 Adding weight to multiple views; 5.18 Use gravity to specify where text appears in a view; 5.19 Test drive; 5.20 Using the android:gravity attribute: a list of values; 5.21 Move the button to the right with layout-gravity; 5.

22 More values you can use with the android:layout-gravity attribute; 5.23 The full linear layout code; 5.24 LinearLayout: a summary; 5.25 GridLayout displays views in a grid; 5.26 Adding views to the grid layout; 5.27 Let''s create a new grid layout; 5.28 We''ll start with a sketch; 5.29 Row 0: add views to specific rows and columns; 5.

30 Row 1: make a view span multiple columns; 5.31 Row 2: make a view span multiple columns; 5.32 The full code for the grid layout; 5.33 GridLayout: a summary; 5.34 Layouts and GUI components have a lot in common; 5.35 GUI components are a type of View; 5.36 What being a view buys you; 5.37 A layout is really a hierarchy of Views; 5.

38 Playing with views; 5.39 Text view; 5.40 Edit Text; 5.41 Button; 5.42 Toggle button; 5.43 Switch; 5.44 Check boxes; 5.45 Radio buttons; 5.

46 Spinner; 5.47 Image views; 5.48 Images: the layout XML; 5.49 Adding images to buttons; 5.50 Image Button; 5.51 Scroll views; 5.52 Toasts; 5.53 Your Android Toolbox;Chapter 6: List Views and Adapters: Getting Organized; 6.

1 Every app starts with ideas; 6.2 Categorize your ideas: top-level, category, and detail/edit activities; 6.3 Navigating through the activities; 6.4 Use ListViews to navigate to data; 6.5 We''re going to build part of the Starbuzz app; 6.6 The drink detail activity; 6.7 The Starbuzz app structure; 6.8 Here are the steps; 6.

9 The Drink class; 6.10 The image files; 6.11 The top-level layout contains an image and a list; 6.12 Use a list view to display the list of options; 6.13 The full top-level layout code; 6.14 Test drive; 6.15 Get ListViews to respond to clicks with a Listener; 6.16 Set the listener to the list view; 6.

17 The full TopLevelActivity code; 6.18 Where we''ve got to; 6.19 A category activity displays the data for a single category; 6.20 A ListActivity is an activity that contains only a list; 6.21 How to create a list activity; 6.22 android:entries works for static array data held in strings.xml; 6.23 Connect list views to arrays with an array adapter; 6.

24 Add the array adapter to DrinkCategoryActivity; 6.25 What happens when you run the code; 6.26 Test drive the app; 6.27 App review: where we''ve got to; 6.28 How we handled clicks in TopLevelActivity; 6.29 Pass data to an activity using the ListActivity onListItemClick() method; 6.30 The full DrinkCategoryActivity code; 6.31 A detail activity displays data for a single record; 6.

32 Retrieve data from the intent; 6.33 Update the views with the data; 6.34 The DrinkActivity code; 6.35 What happens when you run the app; 6.36 The story continues; 6.37 Test drive the app; 6.38 Your Android Toolbox;Chapter 7: Fragments: Make it Modular; 7.1 Your app needs to look great on all devices; 7.

2 Your app may need to behave differently too; 7.3 Fragments allow you to reuse code; 7.4 The Workout app structure; 7.5 Here are the steps; 7.6 The Workout class; 7.7 How to add a fragment to your project; 7.8 Fragment layout code looks just like activity layout code; 7.9 What fragment code looks like;.