AndroidForms


Source link: https://github.com/exallium/AndroidForms

AndroidForms - MVC Forms for Android

Forms, data validation... They can be annoying sometimes. This library is here to try to help you out. AndroidForms aims to be a simple, Generic form library for android. At it's core, there aren't even any dependencies! You could easily move Source, Drain, and Form into any project you'd like. Because I wanted a good way to handle forms on Android, I'm keeping it as a dependency so I can build out helper Sources and helper Drains, like ViewSource!

Architecture

Form is a final class. That means you can't override it. And you know what? You shouldn't have to. All a form does is expose 6 methods:

  • public save() -- Saves the form from Source into Drain if Source is valid
  • public save(bundle) -- Saves the form from Source into Drain if Source is valid. If Bundle isn't null, it writes bundle data to Drain first.
  • public forceSave() -- Saves the form from Source into Drain.
  • public forceSave(bundle) -- Saves the form from Source into Drain. If Bundle isn't null, it writes bundle data to Drain first.
  • public display() -- Writes the Drain information if not null into the Source for initialization.
  • public display(bundle) -- Same as display, but will apply Bundle to Source first.

All forms are created through a builder, and because of this, hide their constructor. You can create a form through Form.Builder<S,D>. The S and D are the Source and Drain subclasses that you create. Let's take a look at those:

Source

Source is an abstract class that takes some type that you want to wrap. You've got to tell it how to create whatever you're wrapping in onCreate. You'll also, in onCreate, add your Validators, which we'll get to in a minute. Most of Source's functionality is hidden from you, and that's on purpose. Thus, you can see:

  • protected onCreate -- Creates a new instance of your Source object (whatever you're wrapping)
  • protected onSourceCreated -- Returns a list of validators to validate the source in form save
  • public getSource -- returns a source object

Drain

Drain is an abstract class that takes some type you want to wrap. You've got to tell it how to create whatever you're wrapping in onCreate. You also need to specify what to do with these objects on form save in onSave, be it writing to a database or emitting an event. Your call. If you pass a null to the constructor, the drain remains null until save or forceSave is called.

  • protectd onCreate -- Where you make an instance of your Drain object (whatever you're wrapping)
  • protected onSave -- where you save your object, emitting events and whatnot.
  • public getDrain -- returns the drain object or null

Mappers

Form.Mapper is an interface which has two methods, mapForward and mapBackward. These are used for transfering data from Source to Drain or vice versa. They are also used to help you load data from a bundle into a source or drain, for initialization. These should never store any state, and thus can usually be static.

  • public mapForward -- Map from source type to drain type
  • public mapBackward -- Map from drain type to source type

Validators

Validator<F> takes a type of object to validate. The objects you can validate are ones who's references don't change. You can't validate a string, per say, but you can validate an EditText, part of which of course is taking it's string and doing some validation on it... get it? There are examples in the samples package. Validators store a weak reference to your field, so it needs a non-null reference to observe. Your Source will call isValid when it runs validation, and delegate to onValid if the reference is not null. The reference is weak, so we aren't holding onto things we shouldn't be. You have access to:

  • protected onValidate(F) -- validate F.

Some simple reusable validators are included for you, and more will be added in the future.

The Builder

Your form is pieced together via Form.Builder<S,D>. S and D are type parameters that refer to the Source and Drain wrapper objects mentioned above. This Builder creates a Form<S,D> for you and returns a new instance of it with every call to build(). The builder's constructor forces you to give non-optional arguments, a Source, a Drain, and a Mapper. You have access to the following methods:

  • withSourceExtrasMapper(Mapper<Bundle, S>) -- Add an optional mapper to map from a bundle into your source (in display(bundle))
  • withDrainExtrasMapper(Mapper<Bundle, D>) -- Add an optional mapper to map from a bundle into your drain (in save(bundle) and forceSave(bundle)

Note that for these bundle mappers, you do not need to support mapBackwards, as it will never be called.

Licensing

AndroidForms is licensed under the MIT Licnese, (C) 2015 by Alex Hart.

TODO

  • Display / Save should return Object wrapped in Source/Drain
  • Losing type information in builder methods

Resources

Side Menu project allows to create side menu with some categories to choose.

Camera module for Android applications.

MonkeyEngine is a 3D game engine for adventurous Java developers. It’s open source, cross platform and cutting edge. And it is all beautifully documented.

Kirai - flavored Android string formatting. Library has fluent API similar to phrase with additional formatting similar to TaggerString and allows to add formatted pieces of text like BabushkaText.

Kirai means phrase in Swahili language.

NetworkEvents is Android library listening network connection state and change of the Wi-Fi signal strength.

It is able to detect ConnectivityStatus when it changes:

  • WIFI_CONNECTED
  • WIFICONNECTEDHAS_INTERNET
  • WIFICONNECTEDHASNOINTERNET
  • MOBILE_CONNECTED
  • OFFLINE

In addition it is able to detect situation when strength of the Wi-Fi signal was changed with WifiSignalStrengthChanged event.

WeatherIconView is an Android library providing custom view for displaying weather icon.

Topics


2D Engines   3D Engines   9-Patch   Action Bars   Activities   ADB   Advertisements   Analytics   Animations   ANR   AOP   API   APK   APT   Architecture   Audio   Autocomplete   Background Processing   Backward Compatibility   Badges   Bar Codes   Benchmarking   Bitmaps   Bluetooth   Blur Effects   Bread Crumbs   BRMS   Browser Extensions   Build Systems   Bundles   Buttons   Caching   Camera   Canvas   Cards   Carousels   Changelog   Checkboxes   Cloud Storages   Color Analysis   Color Pickers   Colors   Comet/Push   Compass Sensors   Conferences   Content Providers   Continuous Integration   Crash Reports   Credit Cards   Credits   CSV   Curl/Flip   Data Binding   Data Generators   Data Structures   Database   Database Browsers   Date &   Debugging   Decompilers   Deep Links   Dependency Injections   Design   Design Patterns   Dex   Dialogs   Distributed Computing   Distribution Platforms   Download Managers   Drawables   Emoji   Emulators   EPUB   Equalizers &   Event Buses   Exception Handling   Face Recognition   Feedback &   File System   File/Directory   Fingerprint   Floating Action   Fonts   Forms   Fragments   FRP   FSM   Functional Programming   Gamepads   Games   Geocaching   Gestures   GIF   Glow Pad   Gradle Plugins   Graphics   Grid Views   Highlighting   HTML   HTTP Mocking   Icons   IDE   IDE Plugins   Image Croppers   Image Loaders   Image Pickers   Image Processing   Image Views   Instrumentation   Intents   Job Schedulers   JSON   Keyboard   Kotlin   Layouts   Library Demos   List View   List Views   Localization   Location   Lock Patterns   Logcat   Logging   Mails   Maps   Markdown   Mathematics   Maven Plugins   MBaaS   Media   Menus   Messaging   MIME   Mobile Web   Native Image   Navigation   NDK   Networking   NFC   NoSQL   Number Pickers   OAuth   Object Mocking   OCR Engines   OpenGL   ORM   Other Pickers   Parallax List   Parcelables   Particle Systems   Password Inputs   PDF   Permissions   Physics Engines   Platforms   Plugin Frameworks   Preferences   Progress Indicators   ProGuard   Properties   Protocol Buffer   Pull To   Purchases   Push/Pull   QR Codes   Quick Return   Radio Buttons   Range Bars   Ratings   Recycler Views   Resources   REST   Ripple Effects   RSS   Screenshots   Scripting   Scroll Views   SDK   Search Inputs   Security   Sensors   Services   Showcase Views   Signatures   Sliding Panels   Snackbars   SOAP   Social Networks   Spannable   Spinners   Splash Screens   SSH   Static Analysis   Status Bars   Styling   SVG   System   Tags   Task Managers   TDD &   Template Engines   Testing   Testing Tools   Text Formatting   Text Views   Text Watchers   Text-to   Toasts   Toolkits For   Tools   Tooltips   Trainings   TV   Twitter   Updaters   USB   User Stories   Utils   Validation   Video   View Adapters   View Pagers   Views   Watch Face   Wearable Data   Wearables   Weather   Web Tools   Web Views   WebRTC   WebSockets   Wheel Widgets   Wi-Fi   Widgets   Windows   Wizards   XML   XMPP   YAML   ZIP Codes