Android Open Source - ExpertAndroid Field

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License

The source code is released under:

MIT License

Java Source Code

package com.androidbook.parse;
//ww w .  j  a  v a 2s.  com
import java.util.ArrayList;

import android.widget.TextView;

/*
 * A self validating entity. 
 * Implements IValidator.
 * 
 * You can attach any number of IValueValidators
 * Checks all the validators in the order indicated
 * Does a setError on the field if a validator fails
 * 
 * validation for the "required" field is built in.
 * 
 * See FormActivity to see how these fields are used
 * 
 */
public class Field
implements IValidator
{
     private TextView control;
     private boolean required = true;
     private ArrayList<IValueValidator> valueValidatorList 
         = new ArrayList<IValueValidator>();

     public Field(TextView tv)
     {
       this(tv, true);
     }
     public Field(TextView tv, boolean inRequired)
     {
       control = tv;
       required = inRequired;
     }
  @Override
  public boolean validate() 
  {
    String value = getValue();
    if (StringUtils.invalidString(value))
    {
      //in valid string
      if (required)
      {
        warnRequiredField();
        return false;
      }
    }
    for(IValueValidator validator: valueValidatorList)
    {
      boolean result = validator.validateValue(getValue());
        if (result == true) continue;
        if (result == false)
        {
          //this validator failed
          String errorMessage = validator.getErrorMessage();
          setErrorMessage(errorMessage);
          return false;
        }
    }//eof-for
    //All validators passed
    return true;
  }//eof-validate
  
  
  private void warnRequiredField()
  {
    setErrorMessage("This is a required field");
  }
  public void setErrorMessage(String message)
  {
    control.setError(message);
  }
  public String getValue()
  {
    return this.control.getText().toString();
  }
}//eof-class

Java Source Code List

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