Android Open Source - EasyFeeds Search Posts Task

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Back to project page EasyFeeds.

License

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.manustudios.easyfeeds;
// ww w .j  a va 2s .  c  o  m
import java.io.BufferedReader;
import java.io.FileDescriptor;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.ObjectInputStream.GetField;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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

import com.manustudios.easyfeeds.R;
import com.manustudios.extra.ManagerDate;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.app.Fragment.SavedState;
import android.app.FragmentManager.BackStackEntry;
import android.app.FragmentManager.OnBackStackChangedListener;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v13.app.FragmentStatePagerAdapter;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.text.Html;
import android.util.Log;
import android.util.SparseArray;
import android.view.View;
import android.webkit.WebView.FindListener;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

@SuppressLint("ShowToast")
public class SearchPostsTask extends AsyncTask<String, Void, JSONObject>{

  private Context mContext;
  protected ProgressBar mProgressBar;
  private ViewPager mPager;
    private PagerAdapter mPagerAdapter;
    private FragmentManager mFragmentMan;
  
  public SearchPostsTask(Context context, ProgressBar bar, ViewPager pager, FragmentManager fm){
    mContext = context;
    mProgressBar = bar;
    mPager = pager;
    mFragmentMan = fm;
  }
  
  
  @Override
  protected JSONObject doInBackground(String... arg0) {
    
    String feedUrl = arg0[0];
    JSONObject jsonResponse = null;
    int responseCode = -1;
    try {
      URL searchFeedUrl = new URL(MainActivity.GOOGLE_API_LOAD + feedUrl +MainActivity.GOOGLE_API_POSTS_QTY); 
      HttpURLConnection connection = (HttpURLConnection) searchFeedUrl.openConnection();
      connection.connect();
      
      responseCode = connection.getResponseCode();
      if(responseCode == HttpURLConnection.HTTP_OK){
        Log.i("HTTP Connection", "Feed Url connected");
        //GET DATA INTO JSONObject
        
        String line;
        StringBuilder builder = new StringBuilder();
        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        while((line = reader.readLine()) != null) {
         builder.append(line);
        }
        
        jsonResponse = new JSONObject(builder.toString());
        
      }else{
        Log.i(MainActivity.TAG, "Code: "+responseCode);
      }
      
    } 
    catch (MalformedURLException e) {
      Log.e(MainActivity.TAG, "Exception caught:"+e);
    }
    catch (IOException e) {
      Log.e(MainActivity.TAG, "Exception caught:"+e);
    }
    catch (Exception e) {
      Log.e(MainActivity.TAG, "Exception caught:"+e);
    }
    
    return jsonResponse;
  }
  @Override
  protected void onPostExecute(JSONObject result) {
    showJsonAnswer(result);
  }
  
  
private void showJsonAnswer(JSONObject jsonData) {
    
    mProgressBar.setVisibility(ProgressBar.INVISIBLE);
    
    if(jsonData == null){
      showError();
    }else{
      
      try {
        Log.i("Debugger", "chk json answer");
        JSONObject jsonResponseData = jsonData.getJSONObject("responseData");
        jsonResponseData = jsonResponseData.getJSONObject("feed");
        JSONArray jsonFeedResult = jsonResponseData.getJSONArray("entries"); 
        ArrayList<SparseArray<String>> feedResults = 
            new ArrayList<SparseArray<String>>();  
        //GET THE RESULS INSIDE THE ARRAYLIST
        MainActivity.num_pages = jsonFeedResult.length()/MainActivity.mPostPerPage;    //IMPORTANT***
        Log.i("Num Pages", ""+MainActivity.num_pages);
        for (int i = 0; i < jsonFeedResult.length(); i++) {
          JSONObject feedResult = jsonFeedResult.getJSONObject(i);
          
          String title = feedResult.getString("title");
          String content = feedResult.getString("contentSnippet");
          String image = feedResult.getString("content");
          String date = feedResult.getString("publishedDate");
          
          String linkUrl = feedResult.getString("link");
          
          title = Html.fromHtml(title).toString();
          content = Html.fromHtml(content).toString();
          date = Html.fromHtml(date).toString();
          //linkUrl = Html.fromHtml(linkUrl).toString();
          //Log.i("Debug - Title", ""+title);
          //Log.v("Original Image", image);
          image = getImageFromFeed(image);
          //Log.v("New Image, Position", image+", "+i);
          date = getDateFromFeed(date);
          
          //HashMap<String, String> feedPosts = new HashMap<String, String>();
          SparseArray<String> feedPosts = new SparseArray<String>();
          feedPosts.append(MainActivity.KEY_TITLE, title);
          feedPosts.append(MainActivity.KEY_CONTENT, content);
          feedPosts.append(MainActivity.KEY_IMAGE, image);
          feedPosts.append(MainActivity.KEY_DATE, date);
          
          feedPosts.append(MainActivity.KEY_LINK, linkUrl);
          
          feedResults.add(feedPosts);
        }

        mPagerAdapter = new ScreenSlidePagerAdapter(mFragmentMan, feedResults);
        mPager.setAdapter(mPagerAdapter);

        //String feedTitle = jsonResponseData.getString("title");
        //Toast.makeText(mContext, feedTitle, Toast.LENGTH_LONG);
        
        /*mPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
                  @Override
                  public void onPageSelected(int position) {

                      //invalidateOptionsMenu();
                  }

              });*/

      
      } catch (JSONException e) {
        Log.e(MainActivity.TAG, "json error caught: ", e);
      }
              
    }
    
    
  }  
  
  private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
  
  ArrayList<SparseArray<String>> auxFeeds;
  
  public ScreenSlidePagerAdapter(FragmentManager fragman, ArrayList<SparseArray<String>> feeds) {
        super(fragman);
        auxFeeds = feeds;
        
    }

    @Override
    public Fragment getItem(int position) {    //This is called several times if THERE ARE 3 PAGES THEN IS CALLED 3 TIMES
      
      return ScreenPagerFragment.create(position, auxFeeds, mContext);  //POSITION REPRESENTS THE PAGE NUMBER
    }

    
    
    @Override
    public int getCount() {
        return MainActivity.num_pages;
    }
}

  
  private String getDateFromFeed(String date) {
    ManagerDate dateManager = new ManagerDate();
    return dateManager.convertDate(date);
  }

  private String getImageFromFeed(String image) {
    //TODO CHECK THE IMAGES THAT ARE NOT OBTAINED ON THE LAYOUT AND CHECK ON THE API TO DEFINE IF WHEN
    //THERE ARE MORE THAN ONE IMAGE THE IMAGE IS NOT BEING TRACKED
    //String regex ="(http+)(.*)(.[.](jpg|JPEG|PNG)+)";
    //String regex ="((http|https)+)(.*)(.[.](jpg|JPEG|PNG))";
    //String regex = "(http+|https+)(.*?)(jpg|JPEG|PNG)";
    
    
    String regex ="((img)+)(.*)(.[.](jpg|JPEG|PNG))";
    
    Pattern patChecker = Pattern.compile(regex);
    Matcher regexMatcher = patChecker.matcher(image);
    
    String newImage = "";
    while(regexMatcher.find()){
      if(regexMatcher.group().length() != 0){
        newImage+=image.substring(regexMatcher.start(), regexMatcher.end());
      }
    }
    
    regex="((http|https)+)(.*)(.[.](jpg|JPEG|PNG))";
    patChecker = Pattern.compile(regex);
    regexMatcher = patChecker.matcher(newImage);
    
    String newSecImage="";
    while(regexMatcher.find()){
      if(regexMatcher.group().length() != 0){
        newSecImage+=newImage.substring(regexMatcher.start(), regexMatcher.end());
      }
    }
    
    regex="(jpg|JPEG|PNG)";
    patChecker = Pattern.compile(regex);
    regexMatcher = patChecker.matcher(newSecImage);
    int valSubString=0;
    boolean aux =true;
    while(regexMatcher.find()){
      if(regexMatcher.group().length() != 0){
        if(aux){
          valSubString = regexMatcher.end();
          aux=false;
        }
        
      }
    }
    
    newSecImage = newSecImage.substring(0, valSubString);
    
    Log.i("Image URL", newSecImage);    
    return newSecImage;
  }
  
  private void showError(){
    AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
    builder.setTitle(R.string.error_title);
    builder.setMessage(R.string.error_message);
    builder.setPositiveButton(android.R.string.ok, null);
    AlertDialog dialog = builder.create();
    dialog.show();

    //TextView emptyText = (TextView) findViewById(R.id.empty_textview);
    //emptyText.setText(getString(R.string.no_item_to_display));
  }

  
}

Java Source Code List

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