Android Open Source - HapiPodcastJ Search Activity

From Project

Back to project page HapiPodcastJ.
License

The source code is released under:
GNU General Public License
If you think the Android project HapiPodcastJ listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

/*
 * Copyright (C) 2007 The Android Open Source Project
 *//w  w  w .j a v a 2 s . co  m
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package info.xuluan.podcast;

import info.xuluan.podcastj.R;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.json.JSONArray;
import org.json.JSONObject;

import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Editable;
import android.text.Html;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.Toast;
import info.xuluan.podcast.fetcher.FeedFetcher;
import info.xuluan.podcast.fetcher.Response;
import info.xuluan.podcast.parser.SearchItem;
import info.xuluan.podcast.provider.Subscription;
import info.xuluan.podcast.utils.Log;

public class SearchActivity extends PodcastBaseActivity implements TextWatcher, PodcastTab {

  private final Log log = Log.getLog(getClass());
  private ProgressDialog progress = null;

  EditText mEditText;
  String mHttpContent = "";
  private ArrayAdapter<String> mAdapter;
  private int mStart = 0;
  public List<SearchItem> mItems = new ArrayList<SearchItem>();
  private ArrayList<String> mStrings = new ArrayList<String>();

  @Override
  public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.search_activity);
    setTitle(getResources().getString(R.string.title_channels));

    mAdapter = new ArrayAdapter<String>(this,
        android.R.layout.simple_list_item_1, mStrings);

    setListAdapter(mAdapter);
    getListView().setOnCreateContextMenuListener(this);
    mEditText = (EditText) findViewById(R.id.keywords);
    mEditText.addTextChangedListener(this);
    
    startInit();
    Button next = (Button) findViewById(R.id.ButtonNext);

    next.setEnabled(false);
    next.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v) {
        String str = "&start=" + mStart;

        String url = getUrl();
        if (url != null) {
          start_search(url+str);
        }
      }
    });

    ImageButton start = (ImageButton) findViewById(R.id.ButtonStart);
    start.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v) {
        InputMethodManager m = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        m.toggleSoftInput(InputMethodManager.SHOW_IMPLICIT, InputMethodManager.HIDE_NOT_ALWAYS);
        m.hideSoftInputFromInputMethod(mEditText.getWindowToken(),
            InputMethodManager.HIDE_NOT_ALWAYS);
        
        String str = "&start=" + mStart;

        String url = getUrl();
        if (url != null) {
          start_search(url+str);
        }
      }
    });
    
    TabsHelper.setChannelTabClickListeners(this, R.id.channel_bar_search_button);
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
      MenuInflater inflater = getMenuInflater();
      inflater.inflate(R.menu.search_activity, menu);
      return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
/*    case R.id.backup_channels:
      startActivity(new Intent(this, BackupChannelsActivity.class));
      return true;
    case R.id.add_channel:
      startActivity(new Intent(this, AddChannelActivity.class));
      return true;
    case R.id.list_channels:
      startActivity(new Intent(this, ChannelsActivity.class));
      return true;*/
    }
    return super.onOptionsItemSelected(item);
  }
  
  public String getUrl() {
    String prefix = "http://lfe-alpo-gm.appspot.com/search?q=";
    String suffix = "";
    String str = SearchActivity.this.mEditText.getText().toString();

    Pattern pattern = Pattern.compile("^\\s+");
    Matcher matcher = pattern.matcher(str);

    str = matcher.replaceAll("");

    pattern = Pattern.compile("\\s+$");
    matcher = pattern.matcher(str);

    str = matcher.replaceAll("");

    pattern = Pattern.compile("\\s+");
    matcher = pattern.matcher(str);

    str = matcher.replaceAll("+");
    log.debug("query string = " + str);
    if (str.length() > 0)
      return prefix + str + suffix;

    return null;
  }
  
  public List<SearchItem> parseResult(String content) {
     List<SearchItem> items = new ArrayList<SearchItem>();

    try {
      JSONObject obj_match = new JSONObject(content);
      JSONArray arr = obj_match.getJSONArray("items");

      if (arr.length() == 0) {

      }
      
      for (int i = 0; i < arr.length(); i++) {
        SearchItem item = new SearchItem();
        JSONObject obj = new JSONObject(arr.get(i).toString());
        item.url = obj.get("feed_url").toString();
        item.link = obj.get("feed_url").toString();
        item.title = obj.get("feed_title").toString();
        item.content = obj.get("summary").toString();
        items.add(item);
        
      }

    } catch (Exception e) {

    }
    
    return items;
  }
  public String fetchChannelInfo(String url) {
    FeedFetcher fetcher = new FeedFetcher("Google-Listen/1.1.2 (droid)");
    try {
      Response response = fetcher.fetch(url);

      if (response != null) {
        return response.getContentAsString();
      }

    } catch (Exception e) {
      // e.printStackTrace();
    }
    return null;
  }

  private void start_search(String search_url) {
    SearchActivity.this.progress = ProgressDialog.show(SearchActivity.this,
        getResources().getText(R.string.dialog_title_loading),
        getResources().getText(R.string.dialog_message_loading), true);
    AsyncTask<String, ProgressDialog, String> asyncTask = new AsyncTask<String, ProgressDialog, String>() {
      String url;

      @Override
      protected String doInBackground(String... params) {

        url = params[0];
        // log.debug("doInBackground URL ="+url);
        return fetchChannelInfo(url);

      }

      @Override
      protected void onPostExecute(String result) {

        if (SearchActivity.this.progress != null) {
          SearchActivity.this.progress.dismiss();
          SearchActivity.this.progress = null;
        }

        if (result == null) {
          Toast.makeText(SearchActivity.this, getResources().getString(R.string.network_fail),
              Toast.LENGTH_SHORT).show();
        } else {
          List<SearchItem> items = parseResult(result);
          if(items.size()==0) {
            Toast.makeText(SearchActivity.this, getResources().getString(R.string.no_data_found),
                Toast.LENGTH_SHORT).show();          
          }else{
            mStart += items.size();
            for (int i = 0; i < items.size(); i++) {
              mItems.add(items.get(i));
              mAdapter.add(items.get(i).title);

            }          
          }
        }
        
        updateBtn();
      }
    };
    asyncTask.execute(search_url);
  }

  @Override
  protected void onListItemClick(ListView l, View v, int position, long id) {
    final SearchItem item = mItems.get(position);

    String content = item.content;
    AlertDialog d = new AlertDialog.Builder(this).setIcon(
        R.drawable.alert_dialog_icon).setTitle(item.title).setMessage(
        Html.fromHtml(content)).setPositiveButton(R.string.subscribe,
        new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int whichButton) {
            Subscription sub = new Subscription(item.url);
            sub.link = item.link;
            
            String tags = SearchActivity.this.mEditText.getText().toString();
            String content = "<tag>" + tags + "</tag>";
            content += "<content>" + item.content + "</content>";
            
            sub.comment = content;
            
            int rc = sub.subscribe(getContentResolver());
            
            if(rc == Subscription.ADD_FAIL_DUP){
              Toast.makeText(SearchActivity.this,
                  getResources().getString(R.string.already_subscribed),
                  Toast.LENGTH_SHORT).show();                            
            }else if(rc == Subscription.ADD_SUCCESS){
              Toast.makeText(SearchActivity.this,
                  getResources().getString(R.string.success),
                  Toast.LENGTH_SHORT).show();                
            }else {
              Toast.makeText(SearchActivity.this,
                  getResources().getString(R.string.fail),
                  Toast.LENGTH_SHORT).show();  
            }

            mServiceBinder.start_update();

          }
        }).setNegativeButton(R.string.menu_cancel,
        new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int whichButton) {

            /* User clicked Cancel so do some stuff */
          }
        }).create();

    d.show();

  }

  public void updateBtn() {
    Button next = (Button) findViewById(R.id.ButtonNext);
    if(mStart==0){
      next.setEnabled(false);
      
    } else {
      next.setEnabled(true);
      
    }
  }

  //@Override
  public void afterTextChanged(Editable arg0) {
    mStart = 0;
    mItems.clear();
    mAdapter.clear();
    updateBtn();
  }

  //@Override
  public void beforeTextChanged(CharSequence s, int start, int count,
      int after) {
    // TODO Auto-generated method stub

  }

  //@Override
  public void onTextChanged(CharSequence s, int start, int before, int count) {
    // TODO Auto-generated method stub

  }

  //PodcastTab interface
  public int iconResource() { return R.drawable.search_big_pic; }
  public int tabLabelResource(boolean isLandscape) { return R.string.channel_bar_button_search; }
}
Java Source Code List
