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

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2011  Bartek Przybylski
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation, either version 3 of the License, or
   7  *   (at your option) any later version.
   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 import java.util.HashSet;
  24 import java.util.Iterator;
  25 import java.util.Set;
  26
  27 import com.owncloud.android.DisplayUtils;
  28 import com.owncloud.android.R;
  29
  30 import android.content.Context;
  31 import android.database.DataSetObserver;
  32 import android.view.LayoutInflater;
  33 import android.view.View;
  34 import android.view.ViewGroup;
  35 import android.widget.BaseAdapter;
  36 import android.widget.ImageView;
  37 import android.widget.ListAdapter;
  38 import android.widget.ListView;
  39 import android.widget.TextView;
  40
  41 /**
  42  * This Adapter populates a ListView with all files and directories contained
  43  * in a local directory
  44  *
  45  * @author David A. Velasco
  46  *
  47  */
  48 public class LocalFileListAdapter extends BaseAdapter implements ListAdapter {
  49
  50     private Context mContext;
  51     private File mDirectory;
  52     private File[] mFiles = null;
  53     private Set<DataSetObserver> mObservers = new HashSet<DataSetObserver>();
  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_layout, 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
 114             TextView fileSizeV = (TextView) view.findViewById(R.id.file_size);
 115             TextView lastModV = (TextView) view.findViewById(R.id.last_mod);
 116             ImageView checkBoxV = (ImageView) view.findViewById(R.id.custom_checkbox);
 117             if (!file.isDirectory()) {
 118                 fileSizeV.setVisibility(View.VISIBLE);
 119                 fileSizeV.setText(DisplayUtils.bytesToHumanReadable(file.length()));
 120                 lastModV.setVisibility(View.VISIBLE);
 121                 lastModV.setText(DisplayUtils.unixTimeToHumanReadable(file.lastModified()));
 122                 ListView parentList = (ListView)parent;
 123                 if (parentList.getChoiceMode() == ListView.CHOICE_MODE_NONE) {
 124                     checkBoxV.setVisibility(View.GONE);
 125                 } else {
 126                     if (parentList.isItemChecked(position)) {
 127                         checkBoxV.setImageResource(android.R.drawable.checkbox_on_background);
 128                     } else {
 129                         checkBoxV.setImageResource(android.R.drawable.checkbox_off_background);
 130                     }
 131                     checkBoxV.setVisibility(View.VISIBLE);
 132                 }
 133
 134             } else {
 135                 fileSizeV.setVisibility(View.GONE);
 136                 lastModV.setVisibility(View.GONE);
 137                 checkBoxV.setVisibility(View.GONE);
 138             }
 139
 140             view.findViewById(R.id.imageView2).setVisibility(View.INVISIBLE);   // not GONE; the alignment changes; ugly way to keep it
 141             view.findViewById(R.id.imageView3).setVisibility(View.GONE);
 142         }
 143
 144         return view;
 145     }
 146
 147     @Override
 148     public int getViewTypeCount() {
 149         return 1;
 150     }
 151
 152     @Override
 153     public boolean hasStableIds() {
 154         return false;
 155     }
 156
 157     @Override
 158     public boolean isEmpty() {
 159         return (mFiles == null || mFiles.length == 0);
 160     }
 161
 162     @Override
 163     public void registerDataSetObserver(DataSetObserver observer) {
 164         mObservers.add(observer);
 165     }
 166
 167     @Override
 168     public void unregisterDataSetObserver(DataSetObserver observer) {
 169         mObservers.remove(observer);
 170     }
 171
 172     /**
 173      * Change the adapted directory for a new one
 174      * @param directory     New file to adapt.
 175      */
 176     public void swapDirectory(File directory) {
 177         mDirectory = directory;
 178         mFiles = mDirectory.listFiles();
 179         if (mFiles != null) {
 180             Arrays.sort(mFiles, new Comparator<File>() {
 181                 @Override
 182                 public int compare(File lhs, File rhs) {
 183                     if (lhs.isDirectory() && !rhs.isDirectory()) {
 184                         return -1;
 185                     } else if (!lhs.isDirectory() && rhs.isDirectory()) {
 186                         return 1;
 187                     }
 188                     return compareNames(lhs, rhs);
 189                 }
 190
 191                 private int compareNames(File lhs, File rhs) {
 192                     return lhs.getName().toLowerCase().compareTo(rhs.getName().toLowerCase());
 193                 }
 194
 195             });
 196         }
 197         Iterator<DataSetObserver> it = mObservers.iterator();
 198         while (it.hasNext()) {
 199             it.next().onChanged();
 200         }
 201     }
 202 }