src/com/owncloud/android/ui/adapter/LocalFileListAdapter.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2011  Bartek Przybylski
   3  *   Copyright (C) 2012-2014 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18 package com.owncloud.android.ui.adapter;
  19
  20 import java.io.File;
  21 import java.util.Arrays;
  22 import java.util.Comparator;
  23
  24 import android.content.Context;
  25 import android.graphics.Bitmap;
  26 import android.view.LayoutInflater;
  27 import android.view.View;
  28 import android.view.ViewGroup;
  29 import android.widget.BaseAdapter;
  30 import android.widget.ImageView;
  31 import android.widget.ListAdapter;
  32 import android.widget.ListView;
  33 import android.widget.TextView;
  34
  35 import com.owncloud.android.R;
  36 import com.owncloud.android.datamodel.ThumbnailsCacheManager;
  37 import com.owncloud.android.utils.BitmapUtils;
  38 import com.owncloud.android.utils.DisplayUtils;
  39
  40 /**
  41  * This Adapter populates a ListView with all files and directories contained
  42  * in a local directory
  43  *
  44  * @author David A. Velasco
  45  *
  46  */
  47 public class LocalFileListAdapter extends BaseAdapter implements ListAdapter {
  48
  49     private Context mContext;
  50     private File mDirectory;
  51     private File[] mFiles = null;
  52
  53     public LocalFileListAdapter(File directory, Context context) {
  54         mContext = context;
  55         swapDirectory(directory);
  56     }
  57
  58     @Override
  59     public boolean areAllItemsEnabled() {
  60         return true;
  61     }
  62
  63     @Override
  64     public boolean isEnabled(int position) {
  65         return true;
  66     }
  67
  68     @Override
  69     public int getCount() {
  70         return mFiles != null ? mFiles.length : 0;
  71     }
  72
  73     @Override
  74     public Object getItem(int position) {
  75         if (mFiles == null || mFiles.length <= position)
  76             return null;
  77         return mFiles[position];
  78     }
  79
  80     @Override
  81     public long getItemId(int position) {
  82         return mFiles != null && mFiles.length <= position ? position : -1;
  83     }
  84
  85     @Override
  86     public int getItemViewType(int position) {
  87         return 0;
  88     }
  89
  90     @Override
  91     public View getView(int position, View convertView, ViewGroup parent) {
  92         View view = convertView;
  93         if (view == null) {
  94             LayoutInflater inflator = (LayoutInflater) mContext
  95                     .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  96             view = inflator.inflate(R.layout.list_item, null);
  97         }
  98         if (mFiles != null && mFiles.length > position) {
  99             File file = mFiles[position];
 100
 101             TextView fileName = (TextView) view.findViewById(R.id.Filename);
 102             String name = file.getName();
 103             fileName.setText(name);
 104
 105             ImageView fileIcon = (ImageView) view.findViewById(R.id.thumbnail);
 106             if (!file.isDirectory()) {
 107                 fileIcon.setImageResource(R.drawable.file);
 108             } else {
 109                 fileIcon.setImageResource(R.drawable.ic_menu_archive);
 110             }
 111             fileIcon.setTag(file.hashCode());
 112
 113             TextView fileSizeV = (TextView) view.findViewById(R.id.file_size);
 114             TextView lastModV = (TextView) view.findViewById(R.id.last_mod);
 115             ImageView checkBoxV = (ImageView) view.findViewById(R.id.custom_checkbox);
 116             if (!file.isDirectory()) {
 117
 118                 lastModV.setVisibility(View.VISIBLE);
 119                 lastModV.setText(DisplayUtils.unixTimeToHumanReadable(file.lastModified()));
 120                 ListView parentList = (ListView)parent;
 121                 if (parentList.getChoiceMode() == ListView.CHOICE_MODE_NONE) {
 122                     checkBoxV.setVisibility(View.GONE);
 123                 } else {
 124                     if (parentList.isItemChecked(position)) {
 125                         checkBoxV.setImageResource(android.R.drawable.checkbox_on_background);
 126                     } else {
 127                         checkBoxV.setImageResource(android.R.drawable.checkbox_off_background);
 128                     }
 129                     checkBoxV.setVisibility(View.VISIBLE);
 130                 }
 131
 132              // get Thumbnail if file is image
 133                 if (BitmapUtils.isImage(file)){
 134                 // Thumbnail in Cache?
 135                     Bitmap thumbnail = ThumbnailsCacheManager.getBitmapFromDiskCache(
 136                             String.valueOf(file.hashCode())
 137                     );
 138                     if (thumbnail != null){
 139                         fileIcon.setImageBitmap(thumbnail);
 140                     } else {
 141
 142                         // generate new Thumbnail
 143                         if (ThumbnailsCacheManager.cancelPotentialWork(file, fileIcon)) {
 144                             final ThumbnailsCacheManager.ThumbnailGenerationTask task =
 145                                     new ThumbnailsCacheManager.ThumbnailGenerationTask(fileIcon);
 146                             if (thumbnail == null) {
 147                                 thumbnail = ThumbnailsCacheManager.mDefaultImg;
 148                             }
 149                             final ThumbnailsCacheManager.AsyncDrawable asyncDrawable =
 150                                         new ThumbnailsCacheManager.AsyncDrawable(
 151                                     mContext.getResources(),
 152                                     thumbnail,
 153                                     task
 154                                         );
 155                             fileIcon.setImageDrawable(asyncDrawable);
 156                             task.execute(file);
 157                         }
 158                     }
 159                 } else {
 160                     fileIcon.setImageResource(DisplayUtils.getFileTypeIconId(null, file.getName()));
 161                 }
 162
 163             } else {
 164                 lastModV.setVisibility(View.GONE);
 165                 checkBoxV.setVisibility(View.GONE);
 166             }
 167             fileSizeV.setVisibility(View.VISIBLE);
 168             fileSizeV.setText(DisplayUtils.bytesToHumanReadable(file.length()));
 169
 170             // not GONE; the alignment changes; ugly way to keep it
 171             view.findViewById(R.id.localFileIndicator).setVisibility(View.INVISIBLE);
 172             view.findViewById(R.id.favoriteIcon).setVisibility(View.GONE);
 173
 174             view.findViewById(R.id.sharedIcon).setVisibility(View.GONE);
 175             view.findViewById(R.id.sharedWithMeIcon).setVisibility(View.GONE);
 176         }
 177
 178         return view;
 179     }
 180
 181     @Override
 182     public int getViewTypeCount() {
 183         return 1;
 184     }
 185
 186     @Override
 187     public boolean hasStableIds() {
 188         return false;
 189     }
 190
 191     @Override
 192     public boolean isEmpty() {
 193         return (mFiles == null || mFiles.length == 0);
 194     }
 195
 196     /**
 197      * Change the adapted directory for a new one
 198      * @param directory     New file to adapt. Can be NULL, meaning "no content to adapt".
 199      */
 200     public void swapDirectory(File directory) {
 201         mDirectory = directory;
 202         mFiles = (mDirectory != null ? mDirectory.listFiles() : null);
 203         if (mFiles != null) {
 204             Arrays.sort(mFiles, new Comparator<File>() {
 205                 @Override
 206                 public int compare(File lhs, File rhs) {
 207                     if (lhs.isDirectory() && !rhs.isDirectory()) {
 208                         return -1;
 209                     } else if (!lhs.isDirectory() && rhs.isDirectory()) {
 210                         return 1;
 211                     }
 212                     return compareNames(lhs, rhs);
 213                 }
 214
 215                 private int compareNames(File lhs, File rhs) {
 216                     return lhs.getName().toLowerCase().compareTo(rhs.getName().toLowerCase());
 217                 }
 218
 219             });
 220         }
 221         notifyDataSetChanged();
 222     }
 223 }