Android Open Source - lists Interactive Array Adapter

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License

The source code is released under:

GNU General Public License

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Java Source Code

package edu.cs4730.ListDemo;
/*  the code taken from below, but has been heavy modified to the point of looking almost
 * nothing like the code on his site.//from   ww  w  .  j a v  a  2 s  . c o  m
 *  
 * From http://www.vogella.de/articles/AndroidListView/article.html
 */

import java.util.List;

import android.app.Activity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;


import android.widget.TextView;

public class InteractiveArrayAdapter extends ArrayAdapter<Model> {

  private final List<Model> list;
  private final Activity context;

  public InteractiveArrayAdapter(Activity context, List<Model> list) {
    super(context, R.layout.rowbuttonlayout, list);
    this.context = context;
    this.list = list;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    CheckBox checkbox;
    TextView text;
    //if (convertView == null) {
    //having problems with the convertVeiw when not null, so just redoing it each time.  ...
      LayoutInflater inflator = context.getLayoutInflater();
      convertView = inflator.inflate(R.layout.rowbuttonlayout, null);
      text = (TextView) convertView.findViewById(R.id.label);
      checkbox = (CheckBox) convertView.findViewById(R.id.check);
      
      //Tag is an like a temp space, in a widget where you can set some information as an Object Class
      //in this case, the position variable.
      checkbox.setTag(String.valueOf(position));  //used to find the list position when we change the check mark
      
      checkbox.setOnCheckedChangeListener(new OnCheckedChangeListener(){
        @Override
        public void onCheckedChanged(CompoundButton buttonView,  boolean isChecked) {
          CheckBox cb = (CheckBox)buttonView;
          Log.w("checkbox", "checkbox has "+cb.getTag());
            //first get the model item out of the list, using the position stored in Tag.
          Model temp = list.get( Integer.parseInt((String)cb.getTag()));
          //now update our Model with the correct information.
          temp.setSelected(cb.isChecked());
          cb.setChecked(temp.isSelected());  //Not necessary since the GUI handles it.
          
          //say we only want one "item" checked and all the other unchecked.
          String t = (String) cb.getTag();
          int position = Integer.parseInt(t);
          Log.w("checkbox", "Position is " + t + " value is " + cb.isChecked());
          for (int i=0; i<list.size();i++) {
            if (i!= position)
             list.get(i).setSelected(false);
          }
          notifyDataSetChanged();  //"redraw" any views that were checked.
        }  
      });
      
    checkbox.setChecked(list.get(position).isSelected());
    text.setText(list.get(position).getName());
    return convertView;
  }


}

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