binding-tc

First Name: ArtfulBits Binding Second Name: Android Easy Binding (AEB)

Android View properties binding to the Business Objects (POJO).

Why TC suffix? TC - Take Care!

State

Active development, started at: 2014-05-15

Changes: Changes Log

Roadmap (v1.0.0 - v2.0.0): Road Map

Compare to Android Binding: Comparison

Goals

High performance,
easy syntax,
minimalistic approach,
highly customizable,
hamcrest validation syntax,
serializable binding configuration
100% covered by unit tests, TDD

#Binding In Details

Example of Usage

Typical Business Object declared in POJO way (with Observable pattern):

public class Pin extends Observable {
  private String mPassword;
  private String mConfirmPassword;

  /** Calculated message based on state of instance. */
  public int getMessage() {
    if (TextUtils.isEmpty(mPassword) || TextUtils.isEmpty(mConfirmPassword))
      return R.string.msgPasswordPatternFail;

    if (mPassword.length() < 4 || mPassword.length() > 6)
      return R.string.msgPasswordPatternFail;

    if (mConfirmPassword.length() < 4 || mConfirmPassword.length() > 6)
      return R.string.msgPasswordPatternFail;

    return mPassword.equals(mConfirmPassword) ?
        R.string.msgPasswordOK :
        R.string.msgPasswordFail;
  }

  public String getConfirmPassword() {
    return mConfirmPassword;
  }

  public void setConfirmPassword(final String confirmPassword) {
    mConfirmPassword = confirmPassword;

    setChanged();
    notifyObservers("ConfirmPassword");
  }

  public String getPassword() {
    return mPassword;
  }

  public void setPassword(final String password) {
    mPassword = password;

    setChanged();
    notifyObservers("Password");
  }
}

Fragment binding:

import com.artfulbits.binding.*;

import static com.artfulbits.binding.toolbox.Binders.*;
import static com.artfulbits.binding.toolbox.Listeners.*;
import static com.artfulbits.binding.toolbox.Models.*;
import static com.artfulbits.binding.toolbox.Molds.*;
import static com.artfulbits.binding.toolbox.Views.*;
import static org.hamcrest.core.IsAnything.anything;

/** Login fragment with simplest UI. */
public class PinFragment extends BindingFragment {

  private final Pin mPin = new Pin();

  public PlaceholderFragment() {
  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.fragment_pin, container, false);
  }

  @Override
  public void onCreateBinding(final BindingManager bm) {
    /**
     * EXPLANATION:
     * - we listen to user input in et_password and et_confirm_password
     * - during update of the model instance by entered text we expect Observable callbacks
     * - observable callback force Binding update of UI label - tv_feedback
     *
     * USE CASE:
     * - on wrong password display Error message
     * - on correct password display OK message,
     * - Correct pattern: pin contains at least 4 digits and not more than 6
     */

    // do binding only from UI side, only PUSH
    Binders.strings(bm) // <CharSequence - to - String>
        .view(editText(getView(), R.id.et_password))
        .onView(anyOf(onTextChanged(), onFocusLost()))
        .model(pojo(mPin, text("Password")))
        .format(onlyPush(fromCharsToString()))
        .validate(Matchers.anyOf(blankString(), matchesPattern("[0-9]{4,6}")));

    Binders.strings(bm) // <CharSequence - to - String>
        .view(editText(getView(), R.id.et_confirm_password))
        .onView(anyOf(onTextChanged(), onFocusLost()))
        .model(pojo(mPin, text("ConfirmPassword")))
        .setTag(R.id.tag_test, "test");

    // POP message from model to View only, do that on model state change
    Binders.numeric(bm) // <CharSequence - to - Integer>
        .view(textView(getView(), R.id.tv_feedback))
        .model(pojo(mPin, integer("Message")))
        .onModel(onObservable())
        .format(onlyPop(new ToView<CharSequence, Integer>() {
          @Override
          public CharSequence toView(final Integer value) {
            return getString(value);
          }
        }));
  }
}

Extended lifecycle

AEB adding a new step into lifecycle onCreateBinding() it executed after the onAttachedToWindow() and before onCreateOptionsMenu().

Generic Concept Overview

Binding Concept

Abstractions

Abstractions and Responsibilities

License

The MIT License (MIT)
Copyright (c) 2014-2015 Oleksandr Kucherenko, ArtfulBits Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

OleksandrKucherenko/binding-tc