Android Open Source - imslpdroid Composers Activity

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License

The source code is released under:

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, includin...

Java Source Code

package com.imslpdroid;
/*w w w  .j  a va2s.com*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.TextView;

import com.imslpdroid.gui.StorableRestrictableListView;

public class ComposersActivity extends StorableRestrictableListView {

  private static final String baseUrl = "http://imslp.org/wiki/Category:Composers";

  @Override
  public List<String> downloadList(Handler h, AtomicBoolean stopFlag) throws IOException {
    h.sendMessage(StorableRestrictableListView.getNotificationMessage(getString(R.string.downloading_list_of_composers), null));
    String url = baseUrl;
    List<String> res = new LinkedList<String>();
    while (url != null && !stopFlag.get()) {
      Document doc = Jsoup.connect(url).timeout(5*1000).get();
      // titles: all the <a> below <div id=mw-pages">
      Element content = doc.getElementById("mw-subcategories");
      if (content != null) {
        Elements links = content.getElementsByTag("a");
        for (Element link : links)
          res.add(link.attr("title").substring(9));
        // examine all anchors for "next 200"
        url = null;
        Elements allAnchors = doc.getElementsByTag("a");
        for (Element anchor : allAnchors)
          if (anchor.hasText() && anchor.text().contains("next 200")) {
            url = "http://imslp.org/" + anchor.attr("href");
            break;
          }
        try {
          Pattern p = Pattern.compile("out of ([0-9\\,]*) total", Pattern.MULTILINE);
          String totalString = doc.getElementById("mw-subcategories").getElementsByTag("p").get(0).text();
          Matcher matcher = p.matcher(totalString);
          matcher.find();
          int total = Integer.parseInt(matcher.group(1).replace(",", ""));
          h.sendMessage(StorableRestrictableListView.getNotificationMessage(
              String.format("%s - %5.2f %%", getString(R.string.downloading_list_of_composers), Math.min(100., res.size() * 100. / total)), null));
        } catch (Exception e) {
          Log.e("getComposerList()", e.toString());
        }
      }
    }
    return res;
  }

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // click on list item
    ListView lv = (ListView) findViewById(R.id.rlv_listview);
    lv.setOnItemClickListener(new OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        String composer = (String) ((TextView) view).getText();
        Intent newIntent = new Intent();
        Bundle bun = new Bundle();
        bun.putString("composer", composer);
        bun.putString("prevPage", "ComposersActivity");
        newIntent.setClass(parent.getContext(), PiecesActivity.class);
        newIntent.putExtras(bun);
        startActivity(newIntent);
      }
    });
  }

  @Override
  public String getBaseUrl() {
    return baseUrl;
  }

  @Override
  public List<String> getPreCachedItems() {
    List<String> list = new LinkedList<String>();
    try {
      BufferedReader br = new BufferedReader(new InputStreamReader(getAssets().open("composers.txt")));
      String line = br.readLine();
      while (line != null) {
        line = line.trim();
        if (line.length() > 0) {
          list.add(line);
          line = br.readLine();
        }
      }
    } catch (IOException e) {
      Log.e("composersactivity", "getPreCachedItems ...");
    }
    return list;
  }  
}

Java Source Code List

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