Android Open Source - scanvine-android Story Array Adapter

From Project

License

The source code is released under:
Copyright (c) 2013 Jonathan Evans (http://www.rezendi.com) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Softw...
If you think the Android project scanvine-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.scanvine.android.ui;
//from w w w.  jav  a2s  . co m
import java.io.File;
import java.lang.ref.WeakReference;
import java.util.List;

import org.json.JSONObject;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.scanvine.android.R;
import com.scanvine.android.model.Story;
import com.scanvine.android.util.SVDownloadManager;
import com.scanvine.android.util.Util;

public class StoryArrayAdapter extends ArrayAdapter<Story> {

    Context context;
    WeakReference<StoryListFragment> fragmentRef;
    SVDownloadManager downloadManager;

    public StoryArrayAdapter(Context context, StoryListFragment fragment, int resourceId, List<Story> objects) {
        super(context, resourceId, objects);
        this.context = context;
        this.fragmentRef = new WeakReference<StoryListFragment>(fragment);
        this.downloadManager = new SVDownloadManager();
    }

    /*private view holder class*/
    private class ViewHolder {
        ImageView image;
        ImageButton share;
        ImageButton download;
        TextView txtTitle;
        TextView txtBlurb;
        TextView txtByline;
        View margin;
        
        public void setDownloadButton(final Story story) {
            if (downloadManager.downloadExistsFor(context, story)) {
              download.setImageResource(R.drawable.briefcase);
              download.setOnClickListener(new OnClickListener() {
                  @Override
                  public void onClick(View v) {
                      AlertDialog.Builder builder = new AlertDialog.Builder(context);
                      builder.setMessage(R.string.delete_this_download)
                             .setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
                                 public void onClick(DialogInterface dialog, int id) {
                                     downloadManager.deleteDownload(context, story.getFilename());
                                     setDownloadButton(story);
                                 }
                             })
                             .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
                                 public void onClick(DialogInterface dialog, int id) {
                                 }
                             });
                      AlertDialog dialog = builder.create();
                      dialog.show();
                  }
              });
            }
            else {
              download.setImageResource(R.drawable.download);
              download.setOnClickListener(new OnClickListener() {
                  @Override
                  public void onClick(View v) {
                    if (!Util.AreWeOnline(context))
                      Toast.makeText(context, "Not online", Toast.LENGTH_SHORT).show();
                    else {
                        download.setImageResource(R.drawable.repeat);
                      Handler handler = new FileHandler(context.getApplicationContext(), story, download);
                      downloadManager.fetchFileOnThread(context, story.getURL(), handler);
                    }
                  }
              });
            }
        }
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        final ViewHolder holder = convertView==null ? new ViewHolder() : (ViewHolder) convertView.getTag();
        final Story story = getItem(position);

        LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.story_card, null);
            holder.txtTitle = (TextView) convertView.findViewById(R.id.title);
            holder.txtBlurb = (TextView) convertView.findViewById(R.id.blurb);
            holder.txtByline = (TextView) convertView.findViewById(R.id.byline);
            holder.image = (ImageView) convertView.findViewById(R.id.image);
            holder.share = (ImageButton) convertView.findViewById(R.id.share);
            holder.download = (ImageButton) convertView.findViewById(R.id.download);
            holder.margin = (View) convertView.findViewById(R.id.margin);
            convertView.setTag(holder);
        }

        holder.txtTitle.setText(story.getTitleLine());
        holder.txtByline.setText(story.getByline());
        holder.txtBlurb.setText(story.getSafeBlurb());
        holder.txtBlurb.setVisibility(View.GONE);
        holder.margin.setVisibility(story.isClustered() ? View.VISIBLE : View.GONE);
        
      holder.image.setImageDrawable(context.getResources().getDrawable(R.drawable.scanvine));
      downloadManager.fetchDrawableOnThread(context, story.getImageURL(), new DrawableHandler(holder.image));
      
      holder.setDownloadButton(story);

        holder.image.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
              int currentViz = holder.txtBlurb.getVisibility();
              holder.txtBlurb.setVisibility(currentViz==View.VISIBLE ? View.GONE : View.VISIBLE);
            }
        });
        
        holder.share.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
              String title = story.getTitle();
              if (title.length()>115)
                title = title.substring(0,115)+"...";
              String text = "\""+title+"\""+" via @Scanvine: "+story.getURL();
            Intent shareIntent = new Intent(Intent.ACTION_SEND);
            shareIntent.putExtra(Intent.EXTRA_TEXT, text);
            shareIntent.setType("text/plain");
              context.startActivity(shareIntent);
            }
        });

        convertView.setOnClickListener(new OnItemClickListener(position));
        return convertView;
    }
    
    private class OnItemClickListener implements OnClickListener{       
        private int position;
        OnItemClickListener(int n){
            position = n;
        }
        @Override
        public void onClick(View arg) {
          StoryListFragment fragment = fragmentRef.get();
          if (fragment!=null)
            fragment.selectItem(position);
        }       
    }
    
    private static class DrawableHandler extends Handler {
      private final WeakReference<ImageView> wrImageView;
      
      public DrawableHandler(ImageView imageView) {
        wrImageView = new WeakReference<ImageView>(imageView);
      }
      
      @Override
      public void handleMessage(Message msg) {
        ImageView imageView = wrImageView.get();
        if (imageView != null) {
          Drawable d = Drawable.createFromPath(""+msg.obj);
          imageView.setImageDrawable(d);
        }
      }
    }

    private static class FileHandler extends Handler {
      private Context context;
      private final WeakReference<ImageButton> wrImageButton;
      private final WeakReference<Story> wrStory;
      
      public FileHandler(Context ctx, Story story, ImageButton imageButton) {
        wrImageButton = new WeakReference<ImageButton>(imageButton);
        wrStory = new WeakReference<Story>(story);
        context = ctx;
      }
      
      @Override
      public void handleMessage(Message msg) {
        ImageButton imageButton = wrImageButton.get();
        Story story = wrStory.get();
        if (imageButton != null && story != null) {
          File file = (File) msg.obj;
          Log.i(""+this, "Downloaded: "+file);
          imageButton.setImageResource(R.drawable.briefcase);
          try {
            JSONObject serialized = new JSONObject();
            serialized.put("story", story.getJSON());
            serialized.put("file", Util.ConvertFileToString(file));
            Util.WriteToFile(context, story.getFilename(), ""+serialized);
            Log.i(""+this, "Serialized: "+story+" to "+context.getFilesDir()+"/"+story.getFilename());
            file.delete();
          }
          catch(Exception ex) {
            Log.i(""+this, "Could not serialize: "+story);
          }
        }
      }
    }
}
Java Source Code List
