CollectionListAdapter.java

package com.ap.wificam.collection;

import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.ThumbnailUtils;
import android.os.AsyncTask;
import android.os.Environment;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.ap.wificam.R;
import com.ap.wificam.model.Collection;

import java.io.File;
import java.util.ArrayList;

/**
 * Created by AND1 on 07.03.14.
 */
public class CollectionListAdapter extends BaseAdapter {

    private Context context;
    private ArrayList<Collection> collectionList;
    private int activeCollectionId;
    private File SDCardRoot = Environment.getExternalStorageDirectory();
    private SharedPreferences prefs;
    private String savePath;

    public CollectionListAdapter(Context context, ArrayList<Collection> collectionList, int activeCollectionId) {
        this.context = context;
        this.collectionList = collectionList;
        this.activeCollectionId = activeCollectionId;

        prefs = PreferenceManager.getDefaultSharedPreferences(context);
        savePath =  prefs.getString("folder_name_text", "default_no");
    }

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

    @Override
    public Object getItem(int i) {
        return collectionList.get(i);
    }

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

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        Collection collection = collectionList.get(i);

        if(view == null){
            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            view = inflater.inflate(R.layout.item_collection_row, null);
        }
        TextView textViewDate = (TextView) view.findViewById(R.id.textViewDate);
        textViewDate.setText(collection.getDate());
        TextView textViewLocation = (TextView) view.findViewById(R.id.textViewLocation);
        textViewLocation.setText(collection.getLocation());
        TextView textViewName = (TextView) view.findViewById(R.id.textViewName);
        textViewName.setText(collection.getName());
        TextView textViewActiveCollection = (TextView) view.findViewById(R.id.textViewActiveCollection);

        //set and remove the highlight and text
        if( ((int)collection.getId()) == activeCollectionId){
            textViewActiveCollection.setVisibility(View.VISIBLE);
            view.setBackgroundColor(context.getResources().getColor(R.color.bg_gray_highlight));
        }
        else{
            textViewActiveCollection.setVisibility(View.INVISIBLE);
            view.setBackgroundColor(0x00000000);
        }

        String folderPath = SDCardRoot.getAbsolutePath() + savePath + collection.getId() + "/"; //TODO single var file path

        File collectionFolder = new File(folderPath);
        int imageCount = 0;
        if(collectionFolder.exists()){
            imageCount = collectionFolder.list().length;
        }

        TextView textViewImageCount = (TextView) view.findViewById(R.id.textViewImageCount);
        textViewImageCount.setText(String.valueOf(imageCount));

        //TODO use pre created thumbs
        //genereate ImageView with thumbs
        ImageView imageViewThumb0 = (ImageView) view.findViewById(R.id.imageViewThumb0);
        ImageView imageViewThumb1 = (ImageView) view.findViewById(R.id.imageViewThumb1);
        ImageView imageViewThumb2 = (ImageView) view.findViewById(R.id.imageViewThumb2);
        ImageView imageViewThumb3 = (ImageView) view.findViewById(R.id.imageViewThumb3);
        ViewHolder holder = new ViewHolder(i, imageViewThumb0, imageViewThumb1, imageViewThumb2, imageViewThumb3);
        holder.position = i;

        if(imageCount>0){
            String[] imageFilePaths = getFilePaths(folderPath);
            new ThumbnailTask(i, holder, imageFilePaths).execute("");
        }

        return view;
    }

    private class ThumbnailTask extends AsyncTask<String, Void, String> {                           //TODO better Classname

        private ViewHolder viewHolder;
        private String[] filePaths;
        private Bitmap thumb0, thumb1, thumb2, thumb3;
        private int position;

        public ThumbnailTask(int position, ViewHolder holder, String[] filePaths){
            super();
            this.position = position;
            this.viewHolder = holder;
            this.filePaths = filePaths;
        }

        @Override
        protected String doInBackground(String... params) {
            //TODO make thumbs if not existing

            if(filePaths.length>0){
                thumb0 = ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(filePaths[0]), 200, 200);
                if(filePaths.length>1){
                    thumb1 = ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(filePaths[1]), 200, 200);
                    if(filePaths.length>2){
                        thumb2 = ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(filePaths[2]), 200, 200);
                        if(filePaths.length>3){
                            thumb3 = ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(filePaths[3]), 200, 200);
                        }
                    }
                }
            }
            return "Executed";
        }

        @Override
        protected void onPostExecute(String result) {
            if(viewHolder.position == this.position){
                if(filePaths.length>0){
                    viewHolder.imageView0.setImageBitmap(thumb0);
                    if(filePaths.length>1){
                        viewHolder.imageView1.setImageBitmap(thumb1);
                        if(filePaths.length>2){
                            viewHolder.imageView2.setImageBitmap(thumb2);
                            if(filePaths.length>3){
                                viewHolder.imageView3.setImageBitmap(thumb3);
                            }
                        }
                    }
                }
            }
        }

        @Override
        protected void onPreExecute() {}

        @Override
        protected void onProgressUpdate(Void... values) {}
    }

    public class ViewHolder
    {
        public ImageView imageView0;
        public ImageView imageView1;
        public ImageView imageView2;
        public ImageView imageView3;
        public int position;

        public ViewHolder(int position, ImageView imageView0, ImageView imageView1, ImageView imageView2, ImageView imageView3){
            this.position = position;
            this.imageView0 = imageView0;
            this.imageView1 = imageView1;
            this.imageView2 = imageView2;
            this.imageView3 = imageView3;
        }
    }

    public String[] getFilePaths(String folderPath){

        ArrayList<String> resultIAV = new ArrayList<String>();

        File imageDir = new File(folderPath);                                                           //TODO these are variable file patha. dublicate code except for file://
        String[] imgArray;

        File[] imageList = imageDir.listFiles();

        //TODO catch if no files are found
        if(imageDir.exists()){
            for (File imagePath : imageList) {
                try {
                    if(imagePath.isDirectory())                {
                        imageList = imagePath.listFiles();
                    }
                    if ( imagePath.getName().contains(".jpg")|| imagePath.getName().contains(".JPG")
                            || imagePath.getName().contains(".jpeg")|| imagePath.getName().contains(".JPEG")
                            || imagePath.getName().contains(".png") || imagePath.getName().contains(".PNG")
                            || imagePath.getName().contains(".gif") || imagePath.getName().contains(".GIF")
                            || imagePath.getName().contains(".bmp") || imagePath.getName().contains(".BMP"))
                    {
                        String path = imagePath.getAbsolutePath();
                        resultIAV.add(path);
                        Log.d("and1 : ", path);
                    }
                }
                catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
        else {
            imgArray = new String[0];
        }

        imgArray = resultIAV.toArray(new String[0]);
        return imgArray;
    }

}