A-Readme.md

I decided to build an android app aiming to improve the week one experience for freshers at my university.

Due to the short time frame I had to launch to the app I wasn't able to work with an API and had to scrape the data for the events from a (horribly formatted) raw xml file. I had to parse all this information asynchronously from 8 different URLS which java provides great functionality for and then display it in a clean user friendly format. The code for the Events fragment(screen) can be seen below

EventAdapter.java

package com.dise.weekone.adapters;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.Color;
import android.graphics.Typeface;
import android.graphics.drawable.GradientDrawable;
import android.os.Build;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.dise.weekone.R;
import com.dise.weekone.ui.MainActivity;
import com.dise.weekone.ui.eventsTab.Event;
import com.dise.weekone.util.Const;

import java.util.List;

public class EventAdapter extends ArrayAdapter<Event> {

	protected Context mContext;

	protected List<Event> mEvents;
	protected ViewHolder holder;
	protected Typeface tf;
	protected Resources r;
	protected Typeface fontTime;
	protected Typeface fontTitle;

	public EventAdapter(Context context, List<Event> events) {
		super(context, R.layout.event_item, events);

		fontTitle = Typeface.createFromAsset(context.getAssets(),
				Const.FONT_PRIMER_PRINT);
		fontTime = Typeface.createFromAsset(context.getAssets(),
                Const.FONT_MOCKUP);

		mContext = context;
		mEvents = events;
		r = mContext.getResources();
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {

		if (convertView == null) {
			convertView = LayoutInflater.from(mContext).inflate(
					R.layout.event_item, null);

			holder = new ViewHolder();

			holder.eventTitle = (TextView) convertView
					.findViewById(R.id.eventTitle);
			holder.eventTitle.setTypeface(fontTitle);
			holder.eventTime = (TextView) convertView
					.findViewById(R.id.eventTime);
			holder.eventTime.setTypeface(fontTime);
			holder.tagsLayout = (LinearLayout) convertView
					.findViewById(R.id.tagsContainer);
			holder.reminderInicator = (ImageView) convertView
					.findViewById(R.id.reminderLabel);

			convertView.setTag(holder);

		} else {
			holder = (ViewHolder) convertView.getTag();
		}

		Event event = mEvents.get(position);

		String title = event.getTitle();
		holder.eventTitle.setText(title);

		String time = event.getTime();
		String location = event.getLocation();
		location = location.replace("Location:", "");

		List<String> categories = event.getCategories();

		holder.tagsLayout.removeAllViews();



            for (String category : categories) {

                addCategoryTags(category);

            }

		holder.eventTime.setText(time + " : " + location);

		if (((MainActivity) mContext).isReminderSet(event.getId())) {

			holder.reminderInicator.setVisibility(View.VISIBLE);

		} else {

			holder.reminderInicator.setVisibility(View.INVISIBLE);
		}

		return convertView;
	}

	protected void addCategoryTags(String category) {

		int shortTag = Event.getCategoryShort(category);

		if (shortTag == 0) {
			return;
		}

		TextView t = new TextView(mContext);

		LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
				LinearLayout.LayoutParams.WRAP_CONTENT,
				LinearLayout.LayoutParams.WRAP_CONTENT);

		int px;

		px = Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
				6, r.getDisplayMetrics()));

		layoutParams.setMargins(px, 0, px, 0);

		px = Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
				25, r.getDisplayMetrics()));

		t.setWidth(px);
		t.setHeight(px);
		t.setTextSize(10);
		t.setTypeface(fontTime);
		t.setTextColor(Color.WHITE);
		t.setGravity(Gravity.CENTER);
		t.setLayoutParams(layoutParams);

		t.setText(mContext.getResources().getString(shortTag));

		GradientDrawable drawable = (GradientDrawable) (mContext.getResources()
				.getDrawable(R.drawable.circle_shape));

		drawable.setColor(mContext.getResources().getColor(
				Event.getCategoryColour(category)));


        if (android.os.Build.VERSION.SDK_INT > Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1)
            t.setBackground(drawable);

        else
            t.setBackgroundDrawable(drawable);


		holder.tagsLayout.addView(t);

	}

	private static class ViewHolder {

		LinearLayout tagsLayout;
		TextView eventTitle;
		TextView eventTime;
		ImageView reminderInicator;

	}

}

EventsFragments.java

package com.dise.weekone.ui.eventsTab;

import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.Typeface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;

import com.dise.weekone.R;
import com.dise.weekone.adapters.EventAdapter;
import com.dise.weekone.util.BaseFragment;
import com.dise.weekone.util.Const;
import com.google.analytics.tracking.android.EasyTracker;
import com.google.analytics.tracking.android.Fields;
import com.google.analytics.tracking.android.GoogleAnalytics;
import com.google.analytics.tracking.android.MapBuilder;
import com.google.analytics.tracking.android.Tracker;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.entity.BufferedHttpEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserFactory;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;

public class EventsFragment extends BaseFragment {

    protected String eventsData[] = { "", "", "", "", "", "", "", "" };
    protected List<List<Event>> eventsLists;
    protected List<Event> selectedDate;
    protected String day = Const.START_DAY;
    protected ProgressBar progressBar;
    protected LinearLayout linearLayout;
    protected Typeface font;
    protected SharedPreferences spfEventsData;
    protected GetEventsTask gEventsTask;
    protected TextView emptyList;

    protected Button prevSelectedButton;

    @Override
    public void onStart() {
        super.onStart();
        EasyTracker.getInstance(getActivity()).activityStart(getActivity());
    }

    @Override
    public void onStop() {
        super.onStop();
        EasyTracker.getInstance(getActivity()).activityStop(getActivity());
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        super.onCreateView(inflater, container, savedInstanceState);

        View rootView = inflater.inflate(R.layout.fragment_events, container,
                false);

        ab.setTitle(Const.TAB_TITLE_EVENTS);

        font = Typeface.createFromAsset(mainActivity.getAssets(),
                Const.FONT_PRIMER_PRINT);

        linearLayout = (LinearLayout) rootView.findViewById(R.id.linearLayout);
        progressBar = (ProgressBar) rootView.findViewById(R.id.progressBar1);

        emptyList = (TextView) rootView.findViewById(android.R.id.empty);

        addEventButtons();

        spfEventsData = mainActivity.getSharedPreferences(
                Const.KEY_EVENTS_DATA, Context.MODE_PRIVATE);

        if (eventsLists == null) {

            progressBar.setVisibility(View.VISIBLE);
        }

        return rootView;

    }

    @Override
    public void onDetach() {
        super.onDetach();

        if (gEventsTask != null)
            gEventsTask.cancel(true);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        eventsData = loadArray();

        if (eventsData.length > 1) {
            handleEventsResponse();
        }
        if (mainActivity.isNetworkAvailable()) {
            gEventsTask = new GetEventsTask();
            gEventsTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
                    Const.EVENTS_URL);

        } else {

            progressBar.setVisibility(View.INVISIBLE);
            emptyList.setText(R.string.no_internet_connection);

        }

        Tracker tracker = GoogleAnalytics.getInstance(getActivity()).getTracker(mainActivity.getResources().getString(R.string.ga_trackingId));

        tracker.send(MapBuilder
                        .createAppView()
                        .set(Fields.SCREEN_NAME, Const.TAB_TITLE_EVENTS)
                        .build()
        );
    }

    private OnClickListener onClickListener = new OnClickListener() {

        @Override
        public void onClick(final View v) {

            if (selectedDate == null) {
                return;
            }

            for (int i = 0; i < linearLayout.getChildCount(); i++) {

                Button btn = (Button) linearLayout.getChildAt(i);

                btn.setBackgroundResource(android.R.color.white);

            }

            day = "" + (20 + v.getId());
            selectedDate = eventsLists.get(v.getId());

            Button selectedButton = (Button) linearLayout.findViewById(v
                    .getId());
            selectedButton.setBackgroundResource(R.drawable.event_circle_shape);

            prevSelectedButton = selectedButton;

            adaptData();
        }

    };

    public void addEventButtons() {

        if (prevSelectedButton == null) {

            prevSelectedButton = (Button) linearLayout.getChildAt(0);

            linearLayout.getChildAt(0).setBackgroundResource(
                    R.drawable.event_circle_shape);
        }

        int l = linearLayout.getChildCount();

        for (int i = 0; i < l; i++) {

            Button btn = (Button) linearLayout.getChildAt(i);
            btn.setTypeface(font);
            btn.setEnabled(true);
            btn.setOnClickListener(onClickListener);

            if (prevSelectedButton != null) {

                if (prevSelectedButton.getText().equals(btn.getText())) {
                    btn.setBackgroundResource(R.drawable.event_circle_shape);
                }

            }
            btn.setId(i);

        }

    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {

        Event selectedEvent = selectedDate.get(position);

        String[] categories = new String[selectedEvent.getCategories().size()];
        categories = selectedEvent.getCategories().toArray(categories);

        Bundle args = new Bundle();
        args.putString(Const.EVENT_TITLE, selectedEvent.getTitle());
        args.putString(Const.EVENT_DESC, selectedEvent.getEventDesc());
        args.putString(Const.EVENT_DATE, selectedEvent.getDate());
        args.putString(Const.EVENT_TIME, selectedEvent.getTime());
        args.putString(Const.EVENT_LOCATION, selectedEvent.getLocation());
        args.putString(Const.EVENT_LINK, selectedEvent.getlink());
        args.putString(Const.EVENT_ID, selectedEvent.getId());
        args.putStringArray(Const.EVENT_CATEGORIES, categories);
        args.putString(Const.EVENT_DAY_OF_WEEK,
                (String) prevSelectedButton.getText());

        mainActivity.addFragments(Const.EVENTS, new EventViewFragment(), args,
                true, true);

    }

    public void handleEventsResponse() {

        eventsLists = new ArrayList<List<Event>>();

        for (String rawData : eventsData) {

            eventsLists.add(parse(rawData));
        }

        if (selectedDate == null) {

            selectedDate = eventsLists.get(0);
        }
        adaptData();

    }

    public void adaptData() {

        EventAdapter adapter = new EventAdapter(getListView().getContext(),
                selectedDate);
        setListAdapter(adapter);

        adapter.notifyDataSetChanged();

    }

    public List<Event> parse(String data) {

        List<Event> tempEventList = null;

        Event event = null;

        try {

            XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
            factory.setNamespaceAware(false);
            XmlPullParser xpp = factory.newPullParser();
            xpp.setInput(new StringReader(data));
            tempEventList = new ArrayList<Event>();

            boolean insideItem = false;

            // Returns the type of current event: START_TAG, END_TAG, etc..
            int eventType = xpp.getEventType();

            while (eventType != XmlPullParser.END_DOCUMENT) {

                if (eventType == XmlPullParser.START_TAG) {

                    if (xpp.getName().equalsIgnoreCase(Const.TAG_XML_ITEM)) {
                        insideItem = true;
                        event = new Event();

                    } else if (xpp.getName().equalsIgnoreCase(
                            Const.TAG_XML_TITLE)) {
                        if (insideItem)
                            event.setTitle(xpp.nextText());
                    } else if (xpp.getName().equalsIgnoreCase(
                            Const.TAG_XML_LINK)) {
                        if (insideItem)
                            event.setlink(xpp.nextText());
                    } else if (xpp.getName().equalsIgnoreCase(
                            Const.TAG_XML_DESCRIPTION)) {
                        if (insideItem) {
                            event.setEventDescString(xpp.nextText());
                        }
                    } else if (xpp.getName().equalsIgnoreCase(
                            Const.TAG_XML_CATEGORY)) {
                        if (insideItem)
                            event.addCategory(xpp.nextText());
                    }

                } else if (eventType == XmlPullParser.END_TAG
                        && xpp.getName().equalsIgnoreCase(Const.TAG_XML_ITEM)) {
                    event = parseXml(event);
                    tempEventList.add(event);
                }

                eventType = xpp.next(); // / move to next element
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        return tempEventList;
    }

    private Event parseXml(Event event) {

        String desc = android.text.Html.fromHtml(event.getEventDesc())
                .toString();

        String lines[] = desc.split("\\r?\\n");

        event.setTime(lines[0]);

        if (lines.length > 3) {

            String combinedDesc = "";

            for (int i = 1; i < (lines.length - 2); i++) {

                combinedDesc += lines[i];

            }

            event.setEventDescString(combinedDesc);
            event.setLocation(lines[lines.length - 1]);

        } else {
            event.setEventDescString(lines[2]);
            event.setLocation("");
        }

        List<String> categories = event.getCategories();

        event.setDate(categories.get(0));

        event.removeCategory(0);

        event.setId(event.getTime() + event.getTitle() + event.getDate());

        return event;
    }

    public class GetEventsTask extends AsyncTask<String, Void, String[]> {
        @Override
        protected String[] doInBackground(String... urls) {

            String eventsDataArr[] = { "", "", "", "", "", "", "", "" };

            try {

                int i = 0;

                for (String url : urls) {

                    eventsDataArr[i] = getSiteData(url);
                    i++;

                }

            } catch (Exception e) {
                e.printStackTrace();
            }

            return eventsDataArr;

        }

        protected String getSiteData(String urlString) throws IOException {

            String data = "";

            DefaultHttpClient httpClient = new DefaultHttpClient();

            HttpGet httpPost = new HttpGet(urlString);

            HttpResponse response = httpClient.execute(httpPost);

            HttpEntity ht = response.getEntity();

            BufferedHttpEntity buf = new BufferedHttpEntity(ht);

            InputStream is = buf.getContent();

            BufferedReader r = new BufferedReader(new InputStreamReader(is));

            StringBuilder total = new StringBuilder();
            while ((data = r.readLine()) != null) {

                total.append(data + "\n");
            }

            return total.toString();

        }

        @Override
        protected void onPostExecute(String[] result) {

            SharedPreferences.Editor editor = spfEventsData.edit();
            editor.putString(Const.KEY_EVENTS_DATA, spfEventsData.toString());
            editor.commit();
            eventsData = result;
            progressBar.setVisibility(View.INVISIBLE);
            handleEventsResponse();
            cacheData();

        }

    }

    public boolean cacheData() {

        SharedPreferences.Editor editor = spfEventsData.edit();
        editor.putInt(Const.KEY_EVENTS_DATA + "_size", eventsData.length);
        for (int i = 0; i < eventsData.length; i++)
            editor.putString(Const.KEY_EVENTS_DATA + "_" + i, eventsData[i]);

        return editor.commit();

    }

    public String[] loadArray() {

        int size;
        size = spfEventsData.getInt(Const.KEY_EVENTS_DATA + "_size", 0);

        String array[] = new String[size];
        for (int i = 0; i < size; i++)
            array[i] = spfEventsData.getString(Const.KEY_EVENTS_DATA + "_" + i,
                    null);

        return array;

    }

}