NotificationSettingsAdapter.java

package com.ese2013.mensaunibe.notification;

import java.util.ArrayList;

import com.ese2013.mensaunibe.R;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;

/**
 * @author group17
 * @author Andreas Hohler
 */

public class NotificationSettingsAdapter extends BaseAdapter {
	private Context context;
	private int resource;
	private LayoutInflater inflater;

	private ArrayList<String> items;
	
	public NotificationSettingsAdapter(Context context, int resource, ArrayList<String> keywords ) {
		super();
		this.context = context;
		this.resource = resource;
		populate( keywords );
	}

	public View getView(int position, View convertView, ViewGroup parent) {
		View view = convertView;
		if(view == null) {
			ViewHolder viewHolder = new ViewHolder();
			inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
			view = inflater.inflate(this.resource, parent, false);
			viewHolder.text = (TextView) view.findViewById(R.id.notification_list_text);
			viewHolder.delete = (ImageButton) view.findViewById(R.id.delete_keyword);
			view.setTag(viewHolder);
		}
		

		ViewHolder holder = (ViewHolder) view.getTag();
		clearHolder(holder);
		
		String item = items.get(position);
		
		holder.delete.setOnClickListener( new NotificationEntryListener(item, this) );
		holder.text.setText( item );
		holder.text.setVisibility(View.VISIBLE);
		holder.delete.setVisibility(View.VISIBLE);
		return view;
	}

	/**
	 * Is the public method to repopulate the whole List.
	 */
	
	@Override
	public void notifyDataSetChanged() {
		super.notifyDataSetChanged();
	}

	/**
	 * Populates the List with the data from the Model.
	 * Can show a toast, if no data is available
	 */
	private void populate( ArrayList<String> keywords ) {
		//fill
		items = new ArrayList<String>(keywords);
		if(items.size() == 0) Toast.makeText(this.context, context.getString(R.string.notification_no_keywords), Toast.LENGTH_LONG).show();
	}

	/**
	 * Returns the keyword of a specific list position
	 * @param position: position of the item
	 * @return the keyword
	 */
	public String getItem(int position) {
		return items.get(position);
	}

	/**
	 * returns just the Id of an list item (it's the position itself)
	 * @param position - position of the item
	 * @return position of the item
	 */
	public long getItemId(int position) {
		return position;
	}

	/**
	 * @return the size of the list
	 */
	public int getCount() {
		return items.size();
	}
	
	static class ViewHolder {
		public TextView text;
		public ImageButton delete;
	}
	
	/**
	 * Clears all the views and hide them
	 * @param ViewHolder that holds all views
	 */
	private void clearHolder(ViewHolder holder) {
		holder.text.setText("");
		holder.text.setVisibility(View.GONE);
		holder.delete.setVisibility(View.GONE);
	}

	public boolean add(String string) {
		if(items.contains(string)) return false;
		String res = string.replaceAll("\\s", "");
		if(res.length() < 1) return false;
		items.add(string);
		return true;
	}
	
	public void remove(String string) {
		items.remove(string);
	}

	public ArrayList<String> getKeywords() {
		return items;
	}
}