From Grails to Android: A Simple Journey
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One of the key new features of Grails 3 is the build system now being a set of plugins for the Gradle build tool. The Android Framework also uses the Gradle build system to build, test, run and package applications. In this talk, learn how to move from developing applications for Grails 3 to Android. We’re going to cover the following: Project Structure Similarities Use of Gradle Commands User Interface: GSP Pages vs. Android Layout XML Files Dependency Injection: Spring vs. Dagger 2 Walk away with the foundation you need to tackle your first Android application!
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From Grails to Android: A Simple Journey
- 1. FROM GRAILS TO ANDROID A SIMPLE JOURNEY
- 7. OVERVIEW ▸Project Structure ▸User Interface ▸Dependency Injection @BRWNGRLDEV
- 8. OVERVIEW ▸Project Structure ▸User Interface ▸Dependency Injection ▸Persistence @BRWNGRLDEV
- 10. GRAILS APP STRUCTURE grails create-app @BRWNGRLDEV
- 11. GRAILS APP STRUCTURE grails create-app @BRWNGRLDEV
- 15. ANDROID APP STRUCTURE @BRWNGRLDEV ▸app directory
- 16. ANDROID APP STRUCTURE @BRWNGRLDEV ▸app directory ▸test directories
- 17. ANDROID APP STRUCTURE @BRWNGRLDEV ▸app directory ▸test directories ▸gradle wrapper
- 19. ANDROID APP STRUCTURE @BRWNGRLDEV most source code
- 24. ANDROID APP STRUCTURE @BRWNGRLDEV strings, colors, sizes, etc.
- 35. @BRWNGRLDEV
- 42. GRADLE COMMANDS @BRWNGRLDEV ▸gradle tasks ▸gradle clean ▸gradle test ▸gradle assemble
- 43. GRADLE COMMANDS @BRWNGRLDEV ▸gradle tasks ▸gradle clean ▸gradle test ▸gradle assemble
- 44. PROJECT STRUCTURE @BRWNGRLDEV ▸Folder layout ▸Domain models ▸Gradle Configuration
- 45. @BRWNGRLDEV
- 52. GRAILS GSP PAGE @BRWNGRLDEV <f:display bean=“book”/>
- 55. @BRWNGRLDEV XML?! ARE YOU KIDDING ME?!!!
- 56. @BRWNGRLDEV XML?! ARE YOU KIDDING ME?!!!
- 57. @BRWNGRLDEV XML?! ARE YOU KIDDING ME?!!!
- 58. @BRWNGRLDEV XML?! ARE YOU KIDDING ME?!!!
- 66. STYLE & SIZE RESOURCES @BRWNGRLDEV
- 67. STYLE & SIZE RESOURCES @BRWNGRLDEV
- 68. STYLE & SIZE RESOURCES @BRWNGRLDEV
- 69. STYLE & SIZE RESOURCES @BRWNGRLDEV
- 70. STYLE & SIZE RESOURCES @BRWNGRLDEV ▸colors ▸styles ▸strings ▸sizes ▸themes
- 71. STYLE & SIZE RESOURCES @BRWNGRLDEV strings, colors, sizes, etc.
- 74. USER INTERFACE @BRWNGRLDEV ▸GSP pages ▸XML layout ▸Resource folders
- 75. @BRWNGRLDEV
- 77. DEPENDENCY INJECTION @BRWNGRLDEV THE CLIENT DELEGATES TO EXTERNAL CODE (THE INJECTOR) THE RESPONSIBILITY OF PROVIDING ITS DEPENDENCIES. https://en.wikipedia.org/wiki/Dependency_injection
- 78. GRAILS - DEPENDENCY INJECTION @BRWNGRLDEV
- 79. GRAILS - DEPENDENCY INJECTION @BRWNGRLDEV
- 80. GRAILS - DEPENDENCY INJECTION @BRWNGRLDEV
- 81. GRAILS - DEPENDENCY INJECTION @BRWNGRLDEV
- 82. ANDROID - SIMPLE APPROACH @BRWNGRLDEV public class Injector { }
- 83. ANDROID - SIMPLE APPROACH @BRWNGRLDEV public class Injector { private static BookService bookService; }
- 84. ANDROID - SIMPLE APPROACH @BRWNGRLDEV public class Injector { private static BookService bookService; public static BookService provideBookService () { if ( bookService == null ) { bookService = new BookService(); } return bookService; } }
- 85. ANDROID - SIMPLE APPROACH @BRWNGRLDEV public class Activity { private BooksPresenter booksPresenter; @Override protected void onCreate (Bundle savedInstanceState) { … booksPresenter = new BooksPresenter( Injector.provideBookService() ); } }
- 87. ANDROID - DAGGER @BRWNGRLDEV public class BooksPresenter { private final BookService bookService; }
- 88. ANDROID - DAGGER @BRWNGRLDEV public class BooksPresenter { private final BookService bookService; @Inject BooksPresenter(BookService bookService) { this.bookService = bookService; } }
- 89. ANDROID - DAGGER @BRWNGRLDEV @Module public class AppModule { }
- 90. ANDROID - DAGGER @BRWNGRLDEV @Module public class AppModule { @Provides @Singleton BookService provideBookService() { return new BookService(); } }
- 91. ANDROID - DAGGER @BRWNGRLDEV @Provides @Singleton BookService provideBookService() { return new BookService(); } @Inject BooksPresenter(BookService bookService) { this.bookService = bookService; }
- 93. @BRWNGRLDEV
- 96. @BRWNGRLDEV GORM def book = new Book(title: ‘Clean Code’) book.save()
- 97. @BRWNGRLDEV GORM def book = new Book(title: ‘Clean Code’) book.save() def book = Book.findByTitle(‘Clean Code’) println book
- 98. @BRWNGRLDEV GORM def book = new Book(title: ‘Clean Code’) book.save() def book = Book.findByTitle(‘Clean Code’) println book def book = Book.get(1) book.delete()
- 101. SQLITE @BRWNGRLDEV SQLiteDatabase db = dbHelper.getWritableDatabase();
- 102. SQLITE @BRWNGRLDEV SQLiteDatabase db = dbHelper.getWritableDatabase(); ContentValues values = new ContentValues(); values.put(COLUMN_NAME_TITLE, title);
- 103. SQLITE @BRWNGRLDEV SQLiteDatabase db = dbHelper.getWritableDatabase(); ContentValues values = new ContentValues(); values.put(COLUMN_NAME_TITLE, title); db.insert( TABLE_NAME, null, values);
- 104. SQLITE VS. GORM @BRWNGRLDEV SQLiteDatabase db = dbHelper.getWritableDatabase(); ContentValues values = new ContentValues(); values.put(COLUMN_NAME_TITLE, title); db.insert( TABLE_NAME, null, values); def book = new Book(title: ‘Clean Code’) book.save()
- 106. REALM @BRWNGRLDEV
- 107. REALM @BRWNGRLDEV ▸Easy to Set Up
- 108. REALM @BRWNGRLDEV ▸Easy to Set Up ▸Faster than ORMs
- 109. REALM @BRWNGRLDEV ▸Easy to Set Up ▸Faster than ORMs ▸Has a Fluent API
- 110. REALM - CREATING A RECORD @BRWNGRLDEV realm.executeTransaction( new Realm.Transaction() { @Override public void execute (Realm realm) { Book book = realm.createObject(Book.class); book.setTitle(“Clean Code"); } } );
- 111. REALM - CREATING A RECORD @BRWNGRLDEV realm.executeTransaction( new Realm.Transaction() { @Override public void execute (Realm realm) { Book book = realm.createObject(Book.class); book.setTitle(“Clean Code"); } } );
- 112. REALM - QUERY @BRWNGRLDEV RealmResults<Book> results = realm.where(Book.class) .equalTo("title", “Clean Code") .or() .equalTo("title", “Clean Codez") .findAll();
- 113. REALM - QUERY @BRWNGRLDEV RealmResults<Book> results = realm.where(Book.class) .equalTo("title", “Clean Code") .or() .equalTo("title", “Clean Codez") .findAll();
- 114. REALM - CHANGE LISTENERS @BRWNGRLDEV bookListener = new RealmChangeListener() { @Override public void onChange(Book book) { // make changes }};
- 115. REALM - CHANGE LISTENERS @BRWNGRLDEV bookListener = new RealmChangeListener() { @Override public void onChange(Book book) { // make changes }}; book = realm.where(Book.class).equalTo("id", 1).findFirst(); book.addChangeListener(bookListener);
- 117. @BRWNGRLDEV
- 118. SUMMARY @BRWNGRLDEV
- 121. SUMMARY ▸Project Structure ▸User Interface ▸Dependency Injection @BRWNGRLDEV
- 122. SUMMARY ▸Project Structure ▸User Interface ▸Dependency Injection ▸Persistence @BRWNGRLDEV
- 124. KEY TAKEAWAY @BRWNGRLDEV ANDROID IS REALLY HARD!
- 125. KEY TAKEAWAY @BRWNGRLDEV ANDROID IS REALLY HARD! FUN