Android Open Source - HNdroid Main

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The source code is released under:

This is free and unencumbered software released into the public domain. Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a co...

Java Source Code

package com.gluegadget.hndroid;
/*from  w  w w  .j a  va  2  s.  com*/
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.cookie.Cookie;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.htmlcleaner.HtmlCleaner;
import org.htmlcleaner.TagNode;
import org.htmlcleaner.XPatherException;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.PreferenceManager;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SubMenu;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.MenuItem.OnMenuItemClickListener;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.AdapterView.OnItemClickListener;

public class Main extends Activity {
  static final String PREFS_NAME = "user";
  
  static final private int MENU_UPDATE = Menu.FIRST;
  static final private int MENU_LOGIN = 2;
  static final private int MENU_LOGOUT = 3;
  static final private int MENU_PREFERENCES = 4;
  
  private static final int LIST_MENU_GROUP = 10;
  private static final int LIST_NEWS_ID = 11;
  private static final int LIST_BEST_ID = 12;
  private static final int LIST_ACTIVE_ID = 13;
  private static final int LIST_NOOB_ID = 14;
  
  static final private int CONTEXT_USER_SUBMISSIONS = 2;
  static final private int CONTEXT_COMMENTS = 3;
  static final private int CONTEXT_USER_LINK = 4;
  static final private int CONTEXT_USER_UPVOTE = 5;
  static final private int CONTEXT_GOOGLE_MOBILE = 6;
  
  static final private int NOTIFY_DATASET_CHANGED = 1;
  static final private int LOGIN_FAILED = 2;
  static final private int LOGIN_SUCCESSFULL = 3;
  
  static int DEFAULT_ACTION_PREFERENCES = 0;
  
  String loginUrl = "";
  
  ProgressDialog dialog;
  
  ListView newsListView;
  
  NewsAdapter aa;
  
  ArrayList<News> news = new ArrayList<News>();
  
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);

      newsListView = (ListView)this.findViewById(R.id.hnListView);
      registerForContextMenu(newsListView);
      int layoutID = R.layout.news_list_item;
      aa = new NewsAdapter(this, layoutID , news);
      newsListView.setAdapter(aa);
      newsListView.setOnItemClickListener(clickListener);
      dialog = ProgressDialog.show(Main.this, "", "Loading. Please wait...", true);
      new Thread(new Runnable(){
        public void run() {
          refreshNews();
          dialog.dismiss();
          handler.sendEmptyMessage(NOTIFY_DATASET_CHANGED);
        }
      }).start();
    }

    Handler handler = new Handler(){
      @Override
      public void handleMessage(Message msg) {
        switch(msg.what){
        case NOTIFY_DATASET_CHANGED:
          aa.notifyDataSetChanged();
          newsListView.setSelection(0);
          break;
        case LOGIN_FAILED:
          Toast.makeText(Main.this, "Login failed :(", Toast.LENGTH_LONG).show();
          break;
        case LOGIN_SUCCESSFULL:
          Toast.makeText(Main.this, "Successful login :)", Toast.LENGTH_LONG).show();
          dialog = ProgressDialog.show(Main.this, "", "Reloading. Please wait...", true);
            new Thread(new Runnable(){
              public void run() {
                refreshNews();
                dialog.dismiss();
                handler.sendEmptyMessage(NOTIFY_DATASET_CHANGED);
              }
            }).start();
          break;
        default:
          break;
        }
      }
    };
    
    OnItemClickListener clickListener = new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> newsAV, View view, int pos, long id) {
      final News item = (News) newsAV.getAdapter().getItem(pos);
      if (pos < newsAV.getAdapter().getCount() - 1) {
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
        String ListPreference = prefs.getString("PREF_DEFAULT_ACTION", "view-comments");
        if (ListPreference.equalsIgnoreCase("open-in-browser")) {
          Intent viewIntent = new Intent("android.intent.action.VIEW", Uri.parse((String) item.getUrl()));
          startActivity(viewIntent);
        } else if (ListPreference.equalsIgnoreCase("view-comments")) {
          Intent intent = new Intent(Main.this, Comments.class);
          intent.putExtra("url", item.getCommentsUrl());
          intent.putExtra("title", item.getTitle());
          startActivity(intent);
        } else if (ListPreference.equalsIgnoreCase("mobile-adapted-view")) {
          Intent viewIntent = new Intent("android.intent.action.VIEW",
              Uri.parse((String) "http://www.google.com/gwt/x?u=" + item.getUrl()));
          startActivity(viewIntent);
        }
      } else {
        dialog = ProgressDialog.show(Main.this, "", "Loading. Please wait...", true);
            new Thread(new Runnable(){
              public void run() {
                refreshNews(item.getUrl());
                dialog.dismiss();
                handler.sendEmptyMessage(NOTIFY_DATASET_CHANGED);
              }
            }).start();
      }
    }
  };
    
    private class OnLoginListener implements LoginDialog.ReadyListener {
      @Override
      public void ready(final String username, final String password) {
        try {
          dialog = ProgressDialog.show(Main.this, "", "Trying to login. Please wait...", true);
          new Thread(new Runnable(){
            public void run() {
              Integer message = 0;
              try {
                DefaultHttpClient httpclient = new DefaultHttpClient();
                HttpGet httpget = new HttpGet("http://news.ycombinator.com" + loginUrl);
                HttpResponse response;
                HtmlCleaner cleaner = new HtmlCleaner();
                response = httpclient.execute(httpget);
                HttpEntity entity = response.getEntity();
                TagNode node = cleaner.clean(entity.getContent());
                Object[] loginForm = node.evaluateXPath("//form[@method='post']/input");
                TagNode loginNode = (TagNode) loginForm[0];
                String fnId = loginNode.getAttributeByName("value").toString().trim();          

                HttpPost httpost = new HttpPost("http://news.ycombinator.com/y");
                List <NameValuePair> nvps = new ArrayList <NameValuePair>();
                nvps.add(new BasicNameValuePair("u", username));
                nvps.add(new BasicNameValuePair("p", password));
                nvps.add(new BasicNameValuePair("fnid", fnId));
                httpost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
                response = httpclient.execute(httpost);
                entity = response.getEntity();
                if (entity != null) {
                  entity.consumeContent();
                }
                List<Cookie> cookies = httpclient.getCookieStore().getCookies();
                if (cookies.isEmpty()) {
                  message = LOGIN_FAILED;
                } else {
                  SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
                  SharedPreferences.Editor editor = settings.edit();
                  editor.putString("cookie", cookies.get(0).getValue());
                  editor.commit();
                  message = LOGIN_SUCCESSFULL;
                }
                httpclient.getConnectionManager().shutdown();
                dialog.dismiss();
                handler.sendEmptyMessage(message);
              } catch (Exception e) {
                dialog.dismiss();
                handler.sendEmptyMessage(message);
                e.printStackTrace();
              }
            }
          }).start();
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
      super.onCreateOptionsMenu(menu);

      MenuItem itemRefresh = menu.add(0, MENU_UPDATE, Menu.NONE, R.string.menu_refresh);
      itemRefresh.setIcon(R.drawable.ic_menu_refresh);
      itemRefresh.setOnMenuItemClickListener(new OnMenuItemClickListener() {
        public boolean onMenuItemClick(MenuItem item) {
          try {
            dialog = ProgressDialog.show(Main.this, "", "Reloading. Please wait...", true);
            new Thread(new Runnable(){
              public void run() {
                refreshNews();
                dialog.dismiss();
                handler.sendEmptyMessage(NOTIFY_DATASET_CHANGED);
              }
            }).start();
          } catch (Exception e) {
            e.printStackTrace();
          }
          return true;
        }
      });
      
      SubMenu subMenu = menu.addSubMenu(R.string.menu_lists);
      subMenu.add(LIST_MENU_GROUP, LIST_NEWS_ID, 0, "news");
      subMenu.add(LIST_MENU_GROUP, LIST_BEST_ID, 1, "best");
      subMenu.add(LIST_MENU_GROUP, LIST_ACTIVE_ID, 2, "active");
      subMenu.add(LIST_MENU_GROUP, LIST_NOOB_ID, 3, "noobstories");
      subMenu.setIcon(R.drawable.ic_menu_friendslist);
      subMenu.setGroupCheckable(LIST_MENU_GROUP, true, true);

      MenuItem itemLogout = menu.add(0, MENU_LOGOUT, Menu.NONE, R.string.menu_logout);
      itemLogout.setIcon(R.drawable.ic_menu_logout);
      itemLogout.setOnMenuItemClickListener(new OnMenuItemClickListener() {
        public boolean onMenuItemClick(MenuItem item) {
          try {
            dialog = ProgressDialog.show(Main.this, "", "Reloading. Please wait...", true);
            new Thread(new Runnable(){
              public void run() {
                SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
                SharedPreferences.Editor editor = settings.edit();
                editor.remove("cookie");
                editor.commit();
                refreshNews();
                dialog.dismiss();
                handler.sendEmptyMessage(NOTIFY_DATASET_CHANGED);
              }
            }).start();
          } catch (Exception e) {
            e.printStackTrace();
          }
          return true;
        }
      });

      MenuItem itemLogin = menu.add(0, MENU_LOGIN, Menu.NONE, R.string.menu_login);
      itemLogin.setIcon(R.drawable.ic_menu_login);
      itemLogin.setOnMenuItemClickListener(new OnMenuItemClickListener() {
        public boolean onMenuItemClick(MenuItem item) {
          LoginDialog loginDialog = new LoginDialog(Main.this, "", new OnLoginListener());
          loginDialog.show();

          return true;
        }
      });
      
      MenuItem itemPreferences = menu.add(0, MENU_PREFERENCES, Menu.NONE, R.string.menu_preferences);
      itemPreferences.setIcon(R.drawable.ic_menu_preferences);
      itemPreferences.setOnMenuItemClickListener(new OnMenuItemClickListener() {
      @Override
      public boolean onMenuItemClick(MenuItem item) {
        Intent intent = new Intent(Main.this, Preferences.class);
        startActivity(intent);
        
        return true;
      }
    });

      return true;
    }
    
    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {

      if (loginUrl.contains("submit")) {
        menu.findItem(MENU_LOGIN).setVisible(false);
        menu.findItem(MENU_LOGIN).setEnabled(false);
        menu.findItem(MENU_LOGOUT).setVisible(true);
        menu.findItem(MENU_LOGOUT).setEnabled(true);
      } else {
        menu.findItem(MENU_LOGIN).setVisible(true);
        menu.findItem(MENU_LOGIN).setEnabled(true);
        menu.findItem(MENU_LOGOUT).setVisible(false);
        menu.findItem(MENU_LOGOUT).setEnabled(false);
      }
      
      return super.onPrepareOptionsMenu(menu); 
    }
    
    @Override
    public boolean onOptionsItemSelected(final MenuItem item) {
      switch (item.getItemId()) {
      case LIST_ACTIVE_ID:
      case LIST_BEST_ID:
      case LIST_NOOB_ID:
      case LIST_NEWS_ID:
        try {
        dialog = ProgressDialog.show(Main.this, "", "Reloading. Please wait...", true);
        new Thread(new Runnable(){
          public void run() {
            String hnFeed = getString(R.string.hnfeed);
            refreshNews(hnFeed + item.toString());
            dialog.dismiss();
            handler.sendEmptyMessage(NOTIFY_DATASET_CHANGED);
          }
        }).start();
      } catch (Exception e) {
        e.printStackTrace();
      }
      }
      return true;
    }
    
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
      super.onCreateContextMenu(menu, v, menuInfo);
      
      AdapterContextMenuInfo info = (AdapterContextMenuInfo)menuInfo;
      if (info.position < 30) {
        final News newsContexted = (News) newsListView.getAdapter().getItem(info.position);

        menu.setHeaderTitle(newsContexted.getTitle());

        MenuItem originalLink = menu.add(0, CONTEXT_USER_LINK, 0, newsContexted.getUrl()); 
        originalLink.setOnMenuItemClickListener(new OnMenuItemClickListener() {    
          public boolean onMenuItemClick(MenuItem item) {
            Intent viewIntent = new Intent("android.intent.action.VIEW", Uri.parse((String) item.getTitle()));
            startActivity(viewIntent);
            return true;
          }
        });

        MenuItem googleMobileLink = menu.add(0, CONTEXT_GOOGLE_MOBILE, 0, R.string.context_google_mobile);
        googleMobileLink.setOnMenuItemClickListener(new OnMenuItemClickListener() {    
          public boolean onMenuItemClick(MenuItem item) {
            Intent viewIntent = new Intent("android.intent.action.VIEW",
                Uri.parse((String) "http://www.google.com/gwt/x?u=" + newsContexted.getUrl()));
            startActivity(viewIntent);
            return true;
          }
        });

        if (newsContexted.getCommentsUrl() != "") {
          MenuItem comments = menu.add(0, CONTEXT_COMMENTS, 0, R.string.menu_comments); 
          comments.setOnMenuItemClickListener(new OnMenuItemClickListener() {    
            public boolean onMenuItemClick(MenuItem item) {
              Intent intent = new Intent(Main.this, Comments.class);
              intent.putExtra("url", newsContexted.getCommentsUrl());
              intent.putExtra("title", newsContexted.getTitle());
              startActivity(intent);
              return true;
            }
          });
        }

        MenuItem userSubmissions = menu.add(0, CONTEXT_USER_SUBMISSIONS, 0, newsContexted.getAuthor() + " submissions");
        userSubmissions.setOnMenuItemClickListener(new OnMenuItemClickListener() {    
          public boolean onMenuItemClick(MenuItem item) {
            Intent intent = new Intent(Main.this, Submissions.class);
            intent.putExtra("user", newsContexted.getAuthor());
            intent.putExtra("title", newsContexted.getAuthor() + " submissions");
            startActivity(intent);
            return true;
          }
        });

        if (loginUrl.contains("submit") && newsContexted.getUpVoteUrl() != "") {
          MenuItem upVote = menu.add(0, CONTEXT_USER_UPVOTE, 0, R.string.context_upvote);
          upVote.setOnMenuItemClickListener(new OnMenuItemClickListener() {    
            public boolean onMenuItemClick(MenuItem item) {
              dialog = ProgressDialog.show(Main.this, "", "Voting. Please wait...", true);
              new Thread(new Runnable(){
                public void run() {
                  SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
                  String cookie = settings.getString("cookie", "");
                  DefaultHttpClient httpclient = new DefaultHttpClient();
                  HttpGet httpget = new HttpGet(newsContexted.getUpVoteUrl());
                  httpget.addHeader("Cookie", "user=" + cookie);
                  ResponseHandler<String> responseHandler = new BasicResponseHandler();
                  try {
                    httpclient.execute(httpget, responseHandler);
                  } catch (ClientProtocolException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                  } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                  }
                  dialog.dismiss();
                  handler.sendEmptyMessage(NOTIFY_DATASET_CHANGED);
                }
              }).start();
              return true;
            }
          });
        }
      }
    }
    
    private void refreshNews() {
      String hnFeed = getString(R.string.hnfeed);
      refreshNews(hnFeed);
    }
    
    private void refreshNews(String newsUrl) {
      try {
        news.clear();
        SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
        String cookie = settings.getString("cookie", "");
        DefaultHttpClient httpclient = new DefaultHttpClient();
        HttpGet httpget = new HttpGet(newsUrl);
        if (cookie != "")
          httpget.addHeader("Cookie", "user=" + cookie);
        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        String responseBody = httpclient.execute(httpget, responseHandler);
        HtmlCleaner cleaner = new HtmlCleaner();
        TagNode node = cleaner.clean(responseBody);

        Object[] newsTitles = node.evaluateXPath("//td[@class='title']/a[1]");
        Object[] subtexts = node.evaluateXPath("//td[@class='subtext']");
        Object[] domains = node.evaluateXPath("//span[@class='comhead']");
        Object[] loginFnid = node.evaluateXPath("//span[@class='pagetop']/a");
        TagNode loginNode = (TagNode) loginFnid[5];
        loginUrl = loginNode.getAttributeByName("href").toString().trim();
        /*CleanerProperties props = cleaner.getProperties();
        PrettyXmlSerializer xmlSerializer = new PrettyXmlSerializer(props);
        String fileName = "/mnt/sdcard/hn-loggedin.xml";
        xmlSerializer.writeXmlToFile(node, fileName);*/

        if (newsTitles.length > 0) {
          int j = 0;
          int iterateFor = newsTitles.length;
          for (int i = 0; i < iterateFor; i++) {
            String scoreValue = "";
            String authorValue = "";
            String commentValue = "";
            String domainValue = "";
            String commentsUrl = "";
            String upVoteUrl = "";
            TagNode newsTitle = (TagNode) newsTitles[i];
            
            String title = newsTitle.getChildren().iterator().next().toString().trim();
            String href = newsTitle.getAttributeByName("href").toString().trim();

            if (i < subtexts.length) {
              TagNode subtext = (TagNode) subtexts[i];
              Object[] scoreSpanNode = subtext.evaluateXPath("/span");
            if (scoreSpanNode.length == 0)
              // If there's no span in the subtext it's a job
              // advert. Skip it.
              continue;
              TagNode score = (TagNode) scoreSpanNode[0];
              
              Object[] scoreAnchorNodes = subtext.evaluateXPath("/a");
              TagNode author = (TagNode) scoreAnchorNodes[0];
              authorValue = author.getChildren().iterator().next().toString().trim();
              if (scoreAnchorNodes.length == 2) {
                TagNode comment = (TagNode) scoreAnchorNodes[1];
                commentValue = comment.getChildren().iterator().next().toString().trim();
              }
              
              TagNode userNode = newsTitle.getParent().getParent();
              Object[] upVotes = userNode.evaluateXPath("//td/center/a[1]");
              if (upVotes.length > 0) {
                TagNode upVote = (TagNode) upVotes[0];
                upVoteUrl = upVote.getAttributeByName("href").toString().trim();
              }
              
              Object[] commentsTag = author.getParent().evaluateXPath("/a");
              if (commentsTag.length == 2)
                commentsUrl = score.getAttributeByName("id").toString().trim();
              
              scoreValue = score.getChildren().iterator().next().toString().trim();
              
              if (href.startsWith("http")) {
                TagNode domain = (TagNode)domains[j];
                domainValue = domain.getChildren().iterator().next().toString().trim();
                j++;
              }
            }

            News newsEntry = new News(title, scoreValue, commentValue, authorValue, domainValue, href, commentsUrl, upVoteUrl);
            news.add(newsEntry);
          }
        }
      } catch (MalformedURLException e) {
        e.printStackTrace();
      } catch (IOException e) {
        e.printStackTrace();
      } catch (XPatherException e) {
        e.printStackTrace();
      } finally {

      }
    }
}

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