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.net.Uri;
  27 import android.view.LayoutInflater;
  28 import android.view.View;
  29 import android.view.ViewGroup;
  30 import android.webkit.MimeTypeMap;
  31 import android.widget.BaseAdapter;
  32 import android.widget.ImageView;
  33 import android.widget.ListAdapter;
  34 import android.widget.ListView;
  35 import android.widget.TextView;
  36
  37 import com.owncloud.android.R;
  38 import com.owncloud.android.datamodel.ThumbnailsCacheManager;
  39 import com.owncloud.android.datamodel.ThumbnailsCacheManager.AsyncLocalDrawable;
  40 import com.owncloud.android.utils.DisplayUtils;
  41
  42 /**
  43  * This Adapter populates a ListView with all files and directories contained
  44  * in a local directory
  45  *
  46  * @author David A. Velasco
  47  *
  48  */
  49 public class LocalFileListAdapter extends BaseAdapter implements ListAdapter {
  50
  51     private Context mContext;
  52     private File mDirectory;
  53     private File[] mFiles = null;
  54
  55     public LocalFileListAdapter(File directory, Context context) {
  56         mContext = context;
  57         swapDirectory(directory);
  58     }
  59
  60     @Override
  61     public boolean areAllItemsEnabled() {
  62         return true;
  63     }
  64
  65     @Override
  66     public boolean isEnabled(int position) {
  67         return true;
  68     }
  69
  70     @Override
  71     public int getCount() {
  72         return mFiles != null ? mFiles.length : 0;
  73     }
  74
  75     @Override
  76     public Object getItem(int position) {
  77         if (mFiles == null || mFiles.length <= position)
  78             return null;
  79         return mFiles[position];
  80     }
  81
  82     @Override
  83     public long getItemId(int position) {
  84         return mFiles != null && mFiles.length <= position ? position : -1;
  85     }
  86
  87     @Override
  88     public int getItemViewType(int position) {
  89         return 0;
  90     }
  91
  92     @Override
  93     public View getView(int position, View convertView, ViewGroup parent) {
  94         View view = convertView;
  95         if (view == null) {
  96             LayoutInflater inflator = (LayoutInflater) mContext
  97                     .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  98             view = inflator.inflate(R.layout.list_item, null);
  99         }
 100         if (mFiles != null && mFiles.length > position) {
 101             File file = mFiles[position];
 102
 103             TextView fileName = (TextView) view.findViewById(R.id.Filename);
 104             String name = file.getName();
 105             fileName.setText(name);
 106
 107             ImageView fileIcon = (ImageView) view.findViewById(R.id.imageView1);
 108             if (!file.isDirectory()) {
 109                 fileIcon.setImageResource(R.drawable.file);
 110             } else {
 111                 fileIcon.setImageResource(R.drawable.ic_menu_archive);
 112             }
 113             fileIcon.setTag(file.hashCode());
 114
 115             TextView fileSizeV = (TextView) view.findViewById(R.id.file_size);
 116             TextView lastModV = (TextView) view.findViewById(R.id.last_mod);
 117             ImageView checkBoxV = (ImageView) view.findViewById(R.id.custom_checkbox);
 118             if (!file.isDirectory()) {
 119                 fileSizeV.setVisibility(View.VISIBLE);
 120                 fileSizeV.setText(DisplayUtils.bytesToHumanReadable(file.length()));
 121                 lastModV.setVisibility(View.VISIBLE);
 122                 lastModV.setText(DisplayUtils.unixTimeToHumanReadable(file.lastModified()));
 123                 ListView parentList = (ListView)parent;
 124                 if (parentList.getChoiceMode() == ListView.CHOICE_MODE_NONE) {
 125                     checkBoxV.setVisibility(View.GONE);
 126                 } else {
 127                     if (parentList.isItemChecked(position)) {
 128                         checkBoxV.setImageResource(android.R.drawable.checkbox_on_background);
 129                     } else {
 130                         checkBoxV.setImageResource(android.R.drawable.checkbox_off_background);
 131                     }
 132                     checkBoxV.setVisibility(View.VISIBLE);
 133                 }
 134
 135              // get Thumbnail if file is image
 136                 if (isImage(file)){
 137                 // Thumbnail in Cache?
 138                     Bitmap thumbnail = ThumbnailsCacheManager.getBitmapFromDiskCache(
 139                             String.valueOf(file.hashCode())
 140                     );
 141                     if (thumbnail != null){
 142                         fileIcon.setImageBitmap(thumbnail);
 143                     } else {
 144                         // generate new Thumbnail
 145                         if (ThumbnailsCacheManager.cancelPotentialWork(file, fileIcon)) {
 146                             final ThumbnailsCacheManager.ThumbnailLocalGenerationTask task =
 147                                     new ThumbnailsCacheManager.ThumbnailLocalGenerationTask(fileIcon);
 148                             if (thumbnail == null) {
 149                                 thumbnail = ThumbnailsCacheManager.mDefaultImg;
 150                             }
 151                             final AsyncLocalDrawable asyncDrawable = new AsyncLocalDrawable(
 152                                     mContext.getResources(),
 153                                     thumbnail,
 154                                     task
 155                             );
 156                             fileIcon.setImageDrawable(asyncDrawable);
 157                             task.execute(file);
 158                         }
 159                     }
 160                 } else {
 161                     Uri selectedUri = Uri.fromFile(file);
 162                     String fileExtension = MimeTypeMap.getFileExtensionFromUrl(selectedUri.toString());
 163                     String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(fileExtension);
 164                     fileIcon.setImageResource(DisplayUtils.getResourceId(mimeType, file.getName()));
 165                 }
 166
 167             } else {
 168                 fileSizeV.setVisibility(View.GONE);
 169                 lastModV.setVisibility(View.GONE);
 170                 checkBoxV.setVisibility(View.GONE);
 171             }
 172
 173             view.findViewById(R.id.imageView2).setVisibility(View.INVISIBLE);   // not GONE; the alignment changes; ugly way to keep it
 174             view.findViewById(R.id.imageView3).setVisibility(View.GONE);
 175
 176             view.findViewById(R.id.sharedIcon).setVisibility(View.GONE);
 177             view.findViewById(R.id.sharedWithMeIcon).setVisibility(View.GONE);
 178         }
 179
 180         return view;
 181     }
 182
 183     @Override
 184     public int getViewTypeCount() {
 185         return 1;
 186     }
 187
 188     @Override
 189     public boolean hasStableIds() {
 190         return false;
 191     }
 192
 193     @Override
 194     public boolean isEmpty() {
 195         return (mFiles == null || mFiles.length == 0);
 196     }
 197
 198     /**
 199      * Change the adapted directory for a new one
 200      * @param directory     New file to adapt. Can be NULL, meaning "no content to adapt".
 201      */
 202     public void swapDirectory(File directory) {
 203         mDirectory = directory;
 204         mFiles = (mDirectory != null ? mDirectory.listFiles() : null);
 205         if (mFiles != null) {
 206             Arrays.sort(mFiles, new Comparator<File>() {
 207                 @Override
 208                 public int compare(File lhs, File rhs) {
 209                     if (lhs.isDirectory() && !rhs.isDirectory()) {
 210                         return -1;
 211                     } else if (!lhs.isDirectory() && rhs.isDirectory()) {
 212                         return 1;
 213                     }
 214                     return compareNames(lhs, rhs);
 215                 }
 216
 217                 private int compareNames(File lhs, File rhs) {
 218                     return lhs.getName().toLowerCase().compareTo(rhs.getName().toLowerCase());
 219                 }
 220
 221             });
 222         }
 223         notifyDataSetChanged();
 224     }
 225
 226     private boolean isImage(File file) {
 227         Uri selectedUri = Uri.fromFile(file);
 228         String fileExtension = MimeTypeMap.getFileExtensionFromUrl(selectedUri.toString());
 229         String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(fileExtension);
 230
 231         return (mimeType != null && mimeType.startsWith("image/"));
 232    }
 233 }