Android Open Source - adamsonelearn Curriculum Page Fragment

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License

The source code is released under:
MIT License
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Java Source Code

package com.jaselogic.adamsonelearn;
/*  ww  w.  j  av  a 2 s .  com*/
import java.util.ArrayList;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.ListFragment;
import android.support.v4.content.LocalBroadcastManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;

import com.jaselogic.adamsonelearn.CurrDisplayAdapter.CurrDisplayListItem;
import com.jaselogic.adamsonelearn.CurrDisplayAdapter.ItemType;
import com.jaselogic.adamsonelearn.YearSelectAdapter.YearSelectListItem;

class CurriculumPageFragment {
  public static class YearSelectFragment extends ListFragment {
    public final static String SELECTOR_CURRICULUM_PAGE = "div.contentcontainer2 > table > tbody > tr > td:nth-of-type(2) > div:nth-of-type(3) div";
    public final static String SELECTOR_YEAR = "div[style*=background:#FF9]";
    public final static String[] YEAR_NAMES = {
      "First Year",
      "Second Year",
      "Third Year",
      "Fourth Year",
      "Fifth Year"
    };
    
    private NonSwipeViewPager parentViewPager;
    
    private String cookie;
    private YearSelectAdapter adapter;
    private ArrayList<YearSelectListItem> yearArrayList;
            
    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
      Intent intent = new Intent("page-change-event");
      intent.putExtra("page", String.valueOf(position + 1));
      LocalBroadcastManager.getInstance(getActivity()).sendBroadcast(intent);
      parentViewPager.setCurrentItem(1);
    }
    
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
      View pageRootView = inflater.inflate(R.layout.fragment_listview, 
          container, false);
        
      yearArrayList = new ArrayList<YearSelectListItem>();  
      adapter = new YearSelectAdapter(getActivity(), yearArrayList);
      setListAdapter(adapter);
      
      //get original cookie
      cookie = ((Dashboard)getActivity()).cookie;

      Intent intent = new Intent(getActivity(), CurriculumIntentService.class);
      intent.putExtra(CurriculumIntentService.EXTRA_COOKIE, cookie);
      getActivity().startService(intent);
      
      //get parent viewpager
      parentViewPager = (NonSwipeViewPager) getActivity().findViewById(R.id.curriculum_pager);
      
      return pageRootView;
    }
    
    private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
      @Override
      public void onReceive(Context context, Intent intent) {
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
        populateSelectList(prefs.getInt(CurriculumIntentService.EXTRA_YEARS, 4));
      }
    };

    @Override
    public void onPause() {
      super.onPause();
      LocalBroadcastManager.getInstance(getActivity())
        .unregisterReceiver(mBroadcastReceiver);
    }
    
    @Override
    public void onResume() {
      super.onResume();
      LocalBroadcastManager.getInstance(getActivity())
        .registerReceiver(mBroadcastReceiver, new IntentFilter(CurriculumIntentService.NOTIFICATION));
    }
    
    private void populateSelectList(int yr) {
      //initialize year select
      for(int i = 0; i < yr; i++) {
        YearSelectListItem yearItem = new YearSelectListItem();
        yearItem.year = YEAR_NAMES[i];
        yearItem.imageResId = R.drawable.ic_next;
        yearArrayList.add(yearItem);
      }
      
      adapter.notifyDataSetChanged();
    }
  }
  
  public static class CurrDisplayFragment extends ListFragment {
    
    private ArrayList<CurrDisplayListItem> currArrayList;
    private CurrDisplayAdapter adapter;
    
    public final static String[] SEMESTER_NAMES = {
      "No such semester",
      "First Semester",
      "Second Semester",
      "Summer"
    };
    
    @Override
    public void onResume() {
      super.onResume();
      
      LocalBroadcastManager.getInstance(getActivity())
        .registerReceiver(mMessageReceiver, new IntentFilter("page-change-event"));
      
    }
    
    private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
      @Override
      public void onReceive(Context context, Intent intent) {
        String page = intent.getStringExtra("page");
        
        //clear current list
        currArrayList.clear();
        adapter.notifyDataSetChanged();
        
        //Assert database and tables have been created.
        SQLiteDatabase eLearnDb = getActivity().openOrCreateDatabase("AdUELearn", Context.MODE_PRIVATE, null);
                
        //perform query
        for(int semester = 1; semester <=3; semester++ ) {
          Cursor c = eLearnDb.rawQuery(
              "SELECT * FROM CurrTable WHERE Year = ? AND Semester = ?",
              new String[] {page, String.valueOf(semester)});
          
          CurrDisplayListItem tempItem;
          
          //add titler
          if(c.getCount() > 0) {
            tempItem = new CurrDisplayListItem();
            tempItem.mainText = SEMESTER_NAMES[semester].toUpperCase();
            tempItem.viewType = ItemType.ITEM_TITLE;
            currArrayList.add(tempItem);
          }
          
          while(c.moveToNext()) {
            tempItem = new CurrDisplayListItem();
            tempItem.mainText = c.getString(c.getColumnIndex("SubjName"));
            tempItem.unitsText = "Units: " + c.getString(c.getColumnIndex("Units"));
            
            String subjId = String.valueOf(c.getInt(c.getColumnIndex("Id")));
            //Check for prerequisites.
            if(c.getInt(c.getColumnIndex("HasPrereq")) == 1) {
              Cursor curPrereq = eLearnDb.rawQuery(
                "SELECT SubjCode, SubjName FROM PrereqTable " + 
                  "LEFT JOIN CurrTable ON Id=PrereqId WHERE " + 
                "SubjId = ?", new String[] {subjId});
              
              StringBuilder sb = new StringBuilder();
              while(curPrereq.moveToNext()) {
                sb.append(curPrereq.getString(curPrereq.getColumnIndex("SubjName")));
                if(!curPrereq.isLast()) {
                  sb.append("\n");
                }
              }
              tempItem.prereqText = sb.toString();
            } else {
              tempItem.prereqText = "None";
            }
            
            //Check for corequisites.
            if(c.getInt(c.getColumnIndex("HasCoreq")) == 1) {
              Cursor curCoreq = eLearnDb.rawQuery(
                "SELECT SubjCode, SubjName FROM CoreqTable " + 
                  "LEFT JOIN CurrTable ON Id=CoreqId WHERE " + 
                "SubjId = ?", new String[] {subjId});
              
              StringBuilder sb = new StringBuilder();
              while(curCoreq.moveToNext()) {
                sb.append(curCoreq.getString(curCoreq.getColumnIndex("SubjName")));
                if(!curCoreq.isLast()) {
                  sb.append("\n");
                }
              }
              tempItem.coreqText = sb.toString();
            } else {
              tempItem.coreqText = "None";
            }
            
            //Check for electives.
            if(c.getInt(c.getColumnIndex("HasElec")) == 1) {
              tempItem.viewType = ItemType.ITEM_ELECTIVE;
              Cursor curElec = eLearnDb.rawQuery(
                "SELECT SubjCode, SubjName FROM ElecTable " + 
                  "LEFT JOIN CurrTable ON Id=ElecId WHERE " + 
                "SubjId = ?", new String[] {subjId});
              
              StringBuilder sb = new StringBuilder();
              while(curElec.moveToNext()) {
                sb.append(curElec.getString(curElec.getColumnIndex("SubjName")));
                if(!curElec.isLast()) {
                  sb.append("\n");
                }
              }
              tempItem.elecText = sb.toString();
            } else {
              tempItem.elecText = "None";
              tempItem.viewType = ItemType.ITEM_REGULAR;
            }
            currArrayList.add(tempItem);
          }
        }
        
        eLearnDb.close();

        adapter.notifyDataSetChanged();
      }
    };
    
    @Override
    public void onPause() {
      super.onPause();
      LocalBroadcastManager.getInstance(getActivity())
        .unregisterReceiver(mMessageReceiver);
    };
    
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
      View pageRootView = inflater.inflate(R.layout.fragment_listview, 
          container, false);
        
      currArrayList = new ArrayList<CurrDisplayListItem>();  
      adapter = new CurrDisplayAdapter(getActivity(), currArrayList);
      setListAdapter(adapter);
          
      return pageRootView;
    }
  }
}
Java Source Code List
