Android Open Source - YOW2014-Android-MVVM Search View Model

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License

The source code is released under:
MIT License
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Java Source Code

package com.adilmughal.demo.yow.mvvm.searchd.viewmodel;
//  w  w w  . ja  va2 s.c om
import java.util.List;

import org.robobinding.annotation.ItemPresentationModel;
import org.robobinding.widget.compoundbutton.CheckedChangeEvent;
import org.robobinding.widget.view.ClickEvent;

import com.adilmughal.demo.yow.mvvm.searchd.contract.SearchRepository;
import com.adilmughal.demo.yow.mvvm.searchd.repository.DummySearchRepository;

public class SearchViewModel extends ViewModelBase {
  
  public static final String PROPERTY_IN_VALID = "inValid";
  public static final String PROPERTY_KEYWORDS = "keywords";
  public static final String PROPERTY_LOCATION = "location";
  public static final String PROPERTY_LOCATION_INCLUDED = "locationIncluded";
  public static final String PROPERTY_RESULT_LIST = "resultList";
  public static final String PROPERTY_SEARCH_IN_PROGRESS = "searchInProgress";
  public static final String PROPERTY_VALIDATION_MESSAGE = "validationMessage";
  
  // Validation
  private boolean invalid;
  private String validationMessage;
  
  // Data
  private String keywords;
  private String location;
  private boolean locationIncluded;

  private List<String> resultList;

  // State
  private boolean searchInProgress;
  
  // Getters and Setters
  public String getKeywords() {
    return keywords;
  }

  public String getLocation() {
    return location;
  }

  @ItemPresentationModel(value = StringItemPresentationModel.class)
  public List<String> getResultList() {
    return resultList;
  }

  public String getValidationMessage() {
    return validationMessage;
  }

  public boolean isInValid() {
    return invalid;
  }

  public boolean isLocationIncluded() {
    return locationIncluded;
  }

  public boolean isSearchInProgress() {
    return searchInProgress;
  }

  public void setInValid(boolean inValid) {
    this.invalid = inValid;
    super.notifyPropertyChanged(PROPERTY_IN_VALID);
  }

  public void setKeywords(String keywords) {
    this.keywords = keywords;
    super.notifyPropertyChanged(PROPERTY_KEYWORDS);
  }

  public void setLocation(String location) {
    this.location = location;
    super.notifyPropertyChanged(PROPERTY_LOCATION);
  }

  public void setLocationIncluded(boolean locationIncluded) {
    this.locationIncluded = locationIncluded;
    super.notifyPropertyChanged(PROPERTY_LOCATION_INCLUDED);
  }
  
  public void setResultList(List<String> resultList) {
    this.resultList = resultList;
    super.notifyPropertyChanged(PROPERTY_RESULT_LIST);
  }
  
  public void setSearchInProgress(boolean searchInProgress) {
    this.searchInProgress = searchInProgress;
    super.notifyPropertyChanged(PROPERTY_SEARCH_IN_PROGRESS);
  }
  
  public void setValidationMessage(String validationMessage) {
    this.validationMessage = validationMessage;
    super.notifyPropertyChanged(PROPERTY_VALIDATION_MESSAGE);
  }
  
  // Commands/Methods
  
  public void onLocationIncluded(CheckedChangeEvent event) {
    this.setLocationIncluded(event.isChecked());
  }

  public void onSubmit(ClickEvent event) {
    if (this.validateSearchParams()) {
      retrieveData();
    }
  }

  private void retrieveData() {
    this.setSearchInProgress(true);
    new Thread(new Runnable() {

      @Override
      public void run() {
        SearchRepository repository = new DummySearchRepository();
        List<String> data = repository.getData(keywords);
        setResultList(data);
        setSearchInProgress(false);
      }
    }).start();

  }

  private boolean validateSearchParams() {
    boolean isValid = true;
    StringBuilder errorMessageBuilder = new StringBuilder();

    if (this.getKeywords().length() <= 2) {
      isValid = false;
      errorMessageBuilder
          .append("- Try entering more characters as keywords!");
    }

    if (this.isLocationIncluded()) {
      if (this.getLocation().length() != 4) {
        isValid = false;

        if (errorMessageBuilder.length() > 0)
          errorMessageBuilder.append("\n");

        errorMessageBuilder
            .append("- Invalid location, enter 4 digit postcode!");
      }
    }

    this.setValidationMessage(errorMessageBuilder.toString());
    this.setInValid(!isValid);

    return isValid;
  }

}
Java Source Code List
