Android Open Source - grtransit List Array Adapter

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright 2011 Giles Malet./* w w w. j av a  2  s  .  co  m*/
 *
 * This file is part of GRTransit.
 * 
 * GRTransit is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * GRTransit is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with GRTransit.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * An adapter that is used when drawing the main window list of details.
 */
package net.kw.shrdlu.grtgtfs.LayoutAdapters;

import android.app.ListActivity;
import android.text.Html;
import android.text.util.Linkify;
import android.text.util.Linkify.TransformFilter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import net.kw.shrdlu.grtgtfs.R;
import net.kw.shrdlu.grtgtfs.ServiceCalendar;

import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class ListArrayAdapter extends ArrayAdapter/* <ArrayList<String[]>> */{
  // private static final String TAG = "ListArrayAdapter";

  private final ArrayList<String[]> mDetails;
  private final LayoutInflater mInflater;
  private final int mLayout;

  // For Twitter linkify
  final Pattern mUserPattern = Pattern.compile("@([A-Za-z0-9_-]+)");
  final Pattern mHashPattern = Pattern.compile("#([A-Za-z0-9_-]+)");
  final String mUserScheme = "http://twitter.com/";
  final String mHashScheme = "http://twitter.com/search?q=%23";

  public ListArrayAdapter(ListActivity context, int layout, ArrayList<String[]> details) {
    super(context, layout, details);
    // Log.v(TAG, "TimesArrayAdapter()");

    mDetails = details;
    mInflater = LayoutInflater.from(context);
    mLayout = layout;
  }

  static class ViewHolder {
    TextView stoptime;
    TextView desc;
  }

  @Override
  public View getView(int position, View view, ViewGroup parent) {

    ViewHolder holder;

    // Reuse the convertView if we already have one.... Android will create
    // only enough to fill the screen.
    if (view == null) {
      view = mInflater.inflate(mLayout, parent, false);

      // Save the view when we look them up.
      holder = new ViewHolder();
      holder.stoptime = (TextView) view.findViewById(R.id.stoptime);
      holder.desc = (TextView) view.findViewById(R.id.desc);

      view.setTag(holder);

    } else {
      // Log.d(TAG, "reusing view " + view);
      holder = (ViewHolder) view.getTag();
    }

    holder.stoptime.setText(ServiceCalendar.formattedTime(mDetails.get(position)[0]));

    // Linkify twitter text.
    if (mLayout == R.layout.tweetlayout) {

      // Might be things like &amp; in there....
      holder.desc.setText(Html.fromHtml(mDetails.get(position)[1]));

      // Transform filter returns just the text captured by the first regular expression group.
      final TransformFilter TFilter = new TransformFilter() {
        @Override
        public final String transformUrl(final Matcher match, String url) {
          return match.group(1);
        }
      };

      Linkify.addLinks(holder.desc, Linkify.ALL); // the defaults
      Linkify.addLinks(holder.desc, mUserPattern, mUserScheme, null, TFilter);
      Linkify.addLinks(holder.desc, mHashPattern, mHashScheme, null, TFilter);
    } else {
      holder.desc.setText(mDetails.get(position)[1]);
    }

    return view;
  }
}

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