Android Open Source - BoxSorter Json Assets Initial Conf Loader

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.silverhillapps.boxsorter.loader;
/* ww  w. ja  v a2s .  c o  m*/
import java.io.IOException;
import java.io.InputStream;
import java.util.Random;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.graphics.Color;
import com.silverhillapps.boxsorter.BSApplication;
import com.silverhillapps.boxsorter.conf.Conf;
import com.silverhillapps.boxsorter.conf.Constants;
import com.silverhillapps.boxsorter.entities.Element;
import com.silverhillapps.boxsorter.entities.InitialPositionConfig;
import com.silverhillapps.boxsorter.utils.Utils;


/**
 * This is the json loader from assets. This reads the json file and generates the InitialPositionConfig object which stores the information of the initial elements.
 * @author salva
 *
 */
public class JsonAssetsInitialConfLoader extends InitialConfLoader {

  // Variables for adding random element and for avoiding that these objects overlaps over the static elements in ui
  private int maxWidth;
  private int maxHeight;
  private int correctionFactor;

  public JsonAssetsInitialConfLoader(){
    maxWidth = BSApplication.getmScreenWidth()-Conf.INITIAL_DIMENSION_ELEMENTS;
    correctionFactor = BSApplication.getmScreenHeight()*Conf.INITIAL_FREE_BOTTOM_SPACE_PERCENTAGE_PER_RANDOM_CREATOR/100;
    maxHeight = BSApplication.getmScreenHeight()-Conf.INITIAL_DIMENSION_ELEMENTS-correctionFactor;
  }


  /**
   * This method load the initial elements information
   * @return returns the positions of all the initial elements to be rendered
   */
  @Override
  public InitialPositionConfig loadElements() {

    return parse();
  }


/**
 * This class is called for creating new elements in the canvas.
 * @return Returns the new created element
 */
  @Override
  public Element addElement() {
    return getRandomElement();
  }
  
  
/**
 * Internal method for reading the json file located in assets.
 * @return the json contents
 */
  private String loadJSONFromAsset() {
    String json = null;
    try {

      InputStream is = BSApplication.getAppContext().getAssets().open("initial.json"); // this name should be taken from constants classes or from properties.

      int size = is.available();

      byte[] buffer = new byte[size];

      is.read(buffer);

      is.close();

      json = new String(buffer, "UTF-8");


    } catch (IOException ex) {
      ex.printStackTrace();
      return null;
    }
    return json;

  }

  /**
   * This method parses the json contents and creates the structure of the initial elements
   * @return The initial elements
   */
  private InitialPositionConfig parse() {
    //This parsing usually can be made directly using libraries like Gson.
    InitialPositionConfig ipc = new InitialPositionConfig();
    Element e = null;

    JSONObject obj;
    try {
      String json = loadJSONFromAsset();
      obj = new JSONObject(json);

      JSONArray squaresArray = obj.getJSONArray("squares"); // all these tags from json attributes should be taken from constant classes or from properties. 

      for (int i = 0; i < squaresArray.length(); i++) 
      {
        e = new Element();
        JSONObject square = squaresArray.getJSONObject(i);


        int xpos = square.getInt("x");
        int ypos = square.getInt("y");
        String color = square.getString("colour");
        int colorInt = Color.parseColor(color);

        int size = square.getInt("size");

        e.setFigureCode(Conf.INITIAL_FIGURE_CODE);
        e.setColour(colorInt);

        e.setSize(size);
        e.setxPos(xpos);
        e.setyPos(ypos);

        ipc.addElement(e);

      }
    } catch (JSONException e1) {
      e1.printStackTrace();
    }

    return ipc;
  }

  /**
   * Method for creating random element
   * @return the random element
   */
  private Element getRandomElement(){
    Element newElelement = new Element();
    Random r = new Random();

    int xPos = r.nextInt(maxWidth);
    int yPos = r.nextInt(maxHeight);

    newElelement.setColour(Utils.randomColor());
    newElelement.setSize(Conf.INITIAL_DIMENSION_ELEMENTS*2);
    newElelement.setxPos(xPos);
    newElelement.setyPos(yPos);
    newElelement.setFigureCode(Conf.INITIAL_FIGURE_CODE);

    return newElelement;

  }


}

Java Source Code List

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