Android Open Source - wristband-android Show List Adapter

From Project

License

The source code is released under:
The Artistic License 2.0 Copyright (c) 2014 Allan Pichardo Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed...
If you think the Android project wristband-android 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

package com.nimo.wristband.adapters;
//  w w  w.j a v a  2 s .c  o  m
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import java.util.Locale;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.TextView;

import com.android.volley.RequestQueue;
import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.NetworkImageView;
import com.android.volley.toolbox.Volley;
import com.nimo.wristband.R;
import com.nimo.wristband.db.ShowData;
import com.nimo.wristband.db.ShowData.OnShowsLoadedListener;
import com.nimo.wristband.net.BitmapLruCache;
import com.nimo.wristband.net.Show;
import com.nimo.wristband.net.WristbandResponse;

public class ShowListAdapter extends BaseAdapter implements OnShowsLoadedListener, OnScrollListener{

  private int currentVisibleItemIndex;
  private int currentVisibleItemCount;
  private int currentScrollState;
  private boolean isLoading = false;

  private Context context;
  private List<Show> shows;
  private double latitude;
  private double longitude;
  private ShowData showData;

  private ImageLoader imageLoader;
  private OnLoadingListener loadingListener;
  private ButtonCallbacks callback;

  public ShowListAdapter(Context context, double latitude, double longitude, OnLoadingListener listener){
    NumberFormat nf = NumberFormat.getNumberInstance();
    nf.setMinimumIntegerDigits(2);

    Calendar calendar = Calendar.getInstance(Locale.US);
    String year = String.valueOf(calendar.get(Calendar.YEAR));
    String month = nf.format(calendar.get(Calendar.MONTH)+1);
    String date = nf.format(calendar.get(Calendar.DATE));
    String pollDate = year+"-"+month+"-"+date;

    init(context,latitude,longitude,pollDate,listener);
  }

  public ShowListAdapter(Context context, double latitude, double longitude, String pollDate,OnLoadingListener listener){
    init(context,latitude,longitude,pollDate,listener);
  }

  private void init(Context context, double latitude, double longitude, String pollDate,OnLoadingListener listener){
    this.context = context;
    this.latitude = latitude;
    this.longitude = longitude;
    this.shows = new ArrayList<Show>();
    this.showData = new ShowData(context,pollDate);
    this.showData.setOnShowsLoadedListener(this);
    this.loadingListener = listener;

    RequestQueue requestQueue = Volley.newRequestQueue(context);
    imageLoader = new ImageLoader(requestQueue,new BitmapLruCache());
    //get what we have for now
    this.shows = showData.getShows();
    if(shows.size() == 0){
      loadMoreData();
    }
  }
  
  public void setButtonCallbacks(ButtonCallbacks callback){
    this.callback = callback;
  }
  
  public void setOnLoadingListener(OnLoadingListener listener){
    loadingListener = listener;
  }

  @Override
  public int getCount() {
    return shows.size();
  }

  @Override
  public Object getItem(int position) {
    return shows.get(position);
  }

  @Override
  public long getItemId(int position) {
    return position;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    if(convertView == null){
      LayoutInflater inflater = LayoutInflater.from(context);
      convertView = inflater.inflate(R.layout.show_list_item, null);
    }

    TextView bandNameText = (TextView)convertView.findViewById(R.id.bandNameText);
    TextView venueNameText = (TextView)convertView.findViewById(R.id.venueText);
    NetworkImageView coverImage = (NetworkImageView)convertView.findViewById(R.id.coverImage);
    ImageButton playButton = (ImageButton)convertView.findViewById(R.id.playButton);
    ImageButton shareButton = (ImageButton)convertView.findViewById(R.id.shareButton);
    ImageButton  infoButton = (ImageButton)convertView.findViewById(R.id.infoButton);

    final Show show = (Show)getItem(position);

    bandNameText.setText(show.getBandName());
    venueNameText.setText(show.getVenueName());
    if(show.getLargeArtUrl().length() > 0){
      coverImage.setImageUrl(show.getLargeArtUrl(), imageLoader);
    }
    
    playButton.setOnClickListener(new OnClickListener() {
      
      @Override
      public void onClick(View v) {
        if(callback != null){
          callback.onClickPlay(show);
        }
      }
    });
    shareButton.setOnClickListener(new OnClickListener() {
      
      @Override
      public void onClick(View v) {
        if(callback != null){
          callback.onClickShare(show);
        }
      }
    });
    infoButton.setOnClickListener(new OnClickListener() {
      
      @Override
      public void onClick(View v) {
        if(callback != null){
          callback.onClickInfo(show);
        }
      }
    });

    return convertView;
  }

  @Override
  public void onShowsLoaded(WristbandResponse response) {
    if(response != null){
      if(response.isSuccess()){
        shows.addAll(response.getShows());
        notifyDataSetChanged();
      }
    }
    loadingListener.onLoadingComplete();
    isLoading = false;
  }


  public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
    this.currentVisibleItemCount = visibleItemCount;
    this.currentVisibleItemIndex = firstVisibleItem;
  }

  public void onScrollStateChanged(AbsListView view, int scrollState) {
    this.currentScrollState = scrollState;
    this.isScrollCompleted();
  }

  private void isScrollCompleted() {
    if (this.currentVisibleItemCount > 0 && this.currentScrollState == SCROLL_STATE_IDLE) {
      /*** In this way I detect if there's been a scroll which has completed ***/
      /*** do the work for load more date! ***/
      if(currentVisibleItemIndex == (getCount() - 2)){
        if(!isLoading){
          isLoading = true;
          loadMoreData();
        }
      }
    }
  }

  private void loadMoreData(){
    isLoading = true;
    loadingListener.onLoading();
    showData.fetch(latitude, longitude);
  }
  
  public interface OnLoadingListener{
    public void onLoading();
    public void onLoadingComplete();
  }
  
  public interface ButtonCallbacks{
    public void onClickPlay(Show show);
    public void onClickShare(Show show);
    public void onClickInfo(Show show);
  }

}
Java Source Code List
