CategoriesDialog.java :  » UnTagged » smartshop-project » com » appspot » smartshop » utils » Android Open Source

package com.appspot.smartshop.utils;

import java.util.Arrays;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.LinkedBlockingQueue;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.BaseExpandableListAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ExpandableListView;
import android.widget.TextView;
import android.widget.CompoundButton.OnCheckedChangeListener;

import com.appspot.smartshop.R;

public class CategoriesDialog {
  public static final String TAG = "[CategoriesDialog]";

  private static Builder dialogBuilder;
  private static AlertDialog dialog;
  private static LayoutInflater inflater;
  private static View view;
  private static Button btnSearch;
  private static ExpandableListView expandableListView;
  private static Context context;
  private static MyExpandableListAdapter mAdapter;
  private static Set<String> setSelectedCategories = new HashSet<String>();
  private static CategoriesDialogListener listener;
  private static String[] groups;
  private static String[][] children;
  public static List<String> selectedCat = new LinkedList<String>();

  public static void showCategoriesDialog(final Context context, CategoriesDialogListener listener) {
    setSelectedCategories.clear();
    
    CategoriesDialog.context = context;
    CategoriesDialog.listener = listener;
    
    if (inflater == null) {
      inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }
    view = inflater.inflate(R.layout.search_by_category, null);
    
    // search button
    btnSearch = (Button) view.findViewById(R.id.btnSearch);
    btnSearch.setOnClickListener(new OnClickListener() {
      
      @Override
      public void onClick(View v) {
        if (CategoriesDialog.listener != null) {
          CategoriesDialog.listener.onCategoriesDialogClose(setSelectedCategories);
        }
        dialog.dismiss();
      }
    });
    
    // get categories info
    getCategories();
    
    expandableListView = (ExpandableListView) view.findViewById(R.id.listCategory);
    mAdapter = new CategoriesDialog.MyExpandableListAdapter(groups, children);
    expandableListView.setAdapter(mAdapter);
    
    dialogBuilder = new AlertDialog.Builder(context);
    dialogBuilder.setView(view);
    dialog = dialogBuilder.create(); 
    
    dialog.show();
  }
  
  private static void getCategories() {
    // get parent categories
    int index = 0;
    int len = Global.mapParentCategories.size();
    groups = new String[len];
    for (String cat : Global.mapParentCategories.values()) {
      groups[index++] = cat;
    }
    System.out.println(Arrays.toString(groups));
    
    // get children categories
    children = new String[len][];
    index = 0;
    for (String[] child : Global.listCategories) {
      children[index++] = child;
      System.out.println(Arrays.toString(children[index - 1]));
    }
  }
  
  public interface CategoriesDialogListener {
    void onCategoriesDialogClose(Set<String> categories);
  }
  
  static class MyExpandableListAdapter extends BaseExpandableListAdapter {
    private String[] groups;
    private String[][] children;
    private LayoutInflater inflater;

    public MyExpandableListAdapter(String[] groups, String[][] children) {
      this.groups = groups;
      this.children = children;
      inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    public Object getChild(int groupPosition, int childPosition) {
      return children[groupPosition][childPosition];
    }

    public long getChildId(int groupPosition, int childPosition) {
      return childPosition;
    }

    public int getChildrenCount(int groupPosition) {
      return children[groupPosition].length;
    }

    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
      convertView = inflater.inflate(R.layout.parent_category, null);
      
      TextView textView = (TextView) convertView.findViewById(R.id.txtParentCategory);
      textView.setText(groups[groupPosition]);
      
      return convertView;
    }

    public View getChildView(int groupPosition, int childPosition,
        boolean isLastChild, View convertView, ViewGroup parent) {
      convertView = inflater.inflate(R.layout.child_category, null);
      
      // text view
      final TextView txtView = (TextView) convertView.findViewById(R.id.txtchildCategory);
      txtView.setText(children[groupPosition][childPosition]);
      
      // check box
      String cat_key = Global.mapChildrenCategoriesName.get(
          children[groupPosition][childPosition]);
      final CheckBox chSubCategory = (CheckBox) convertView.findViewById(R.id.checkBox);
      if (selectedCat.contains(cat_key)) {
        chSubCategory.setChecked(true);
      }
      
      // listener
      chSubCategory.setOnCheckedChangeListener(new OnCheckedChangeListener() {
        
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
          if (isChecked) {
            String subCategory = txtView.getText().toString();
            setSelectedCategories.add(Global.mapChildrenCategoriesName.get(subCategory));
          }
        }
      });
      
      return convertView;
    }

    public Object getGroup(int groupPosition) {
      return groups[groupPosition];
    }

    public int getGroupCount() {
      return groups.length;
    }

    public long getGroupId(int groupPosition) {
      return groupPosition;
    }

    public boolean isChildSelectable(int groupPosition, int childPosition) {
      return true;
    }

    public boolean hasStableIds() {
      return true;
    }
  }
}