src/com/owncloud/android/ui/fragment/LocalFileListFragment.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2011  Bartek Przybylski
   3  *   Copyright (C) 2012-2013 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.fragment;
  19
  20 import java.io.File;
  21 import java.util.ArrayList;
  22
  23 import android.app.Activity;
  24 import android.os.Bundle;
  25 import android.os.Environment;
  26 import android.util.SparseBooleanArray;
  27 import android.view.LayoutInflater;
  28 import android.view.View;
  29 import android.view.ViewGroup;
  30 import android.widget.AdapterView;
  31 import android.widget.ImageView;
  32 import android.widget.ListView;
  33
  34 import com.owncloud.android.R;
  35 import com.owncloud.android.lib.common.utils.Log_OC;
  36 import com.owncloud.android.ui.adapter.LocalFileListAdapter;
  37
  38
  39 /**
  40  * A Fragment that lists all files and folders in a given LOCAL path.
  41  *
  42  * @author David A. Velasco
  43  *
  44  */
  45 public class LocalFileListFragment extends ExtendedListFragment {
  46     private static final String TAG = "LocalFileListFragment";
  47
  48     /** Reference to the Activity which this fragment is attached to. For callbacks */
  49     private LocalFileListFragment.ContainerActivity mContainerActivity;
  50
  51     /** Directory to show */
  52     private File mDirectory = null;
  53
  54     /** Adapter to connect the data from the directory with the View object */
  55     private LocalFileListAdapter mAdapter = null;
  56
  57
  58     /**
  59      * {@inheritDoc}
  60      */
  61     @Override
  62     public void onAttach(Activity activity) {
  63         super.onAttach(activity);
  64         try {
  65             mContainerActivity = (ContainerActivity) activity;
  66         } catch (ClassCastException e) {
  67             throw new ClassCastException(activity.toString() + " must implement " + LocalFileListFragment.ContainerActivity.class.getSimpleName());
  68         }
  69     }
  70
  71
  72     /**
  73      * {@inheritDoc}
  74      */
  75     @Override
  76     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
  77         Log_OC.i(TAG, "onCreateView() start");
  78         View v = super.onCreateView(inflater, container, savedInstanceState);
  79         getGridView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
  80         disableSwipe(); // Disable pull refresh
  81         setMessageForEmptyList(getString(R.string.local_file_list_empty));
  82         Log_OC.i(TAG, "onCreateView() end");
  83         return v;
  84     }
  85
  86
  87     /**
  88      * {@inheritDoc}
  89      */
  90     @Override
  91     public void onActivityCreated(Bundle savedInstanceState) {
  92         Log_OC.i(TAG, "onActivityCreated() start");
  93
  94         super.onActivityCreated(savedInstanceState);
  95         mAdapter = new LocalFileListAdapter(mContainerActivity.getInitialDirectory(), getActivity());
  96         setListAdapter(mAdapter);
  97
  98         Log_OC.i(TAG, "onActivityCreated() stop");
  99     }
 100
 101     public void selectAll(){
 102         int numberOfFiles = mAdapter.getCount();
 103         for(int i = 0; i < numberOfFiles; i++){
 104             File file = (File) mAdapter.getItem(i);
 105             if (file != null) {
 106                 if (!file.isDirectory()) {
 107                     /// Click on a file
 108                     getGridView().setItemChecked(i, true);
 109                     // notify the change to the container Activity
 110                     mContainerActivity.onFileClick(file);
 111                 }
 112             }
 113         }
 114     }
 115
 116     /**
 117      * Checks the file clicked over. Browses inside if it is a directory. Notifies the container activity in any case.
 118      */
 119     @Override
 120     public void onItemClick(AdapterView<?> l, View v, int position, long id) {
 121         File file = (File) mAdapter.getItem(position);
 122         if (file != null) {
 123             /// Click on a directory
 124             if (file.isDirectory()) {
 125                 // just local updates
 126                 listDirectory(file);
 127                 // notify the click to container Activity
 128                 mContainerActivity.onDirectoryClick(file);
 129                 // save index and top position
 130                 saveIndexAndTopPosition(position);
 131
 132             } else {    /// Click on a file
 133                 ImageView checkBoxV = (ImageView) v.findViewById(R.id.custom_checkbox);
 134                 if (checkBoxV != null) {
 135                     if (getGridView().isItemChecked(position)) {
 136                         checkBoxV.setImageResource(android.R.drawable.checkbox_on_background);
 137                     } else {
 138                         checkBoxV.setImageResource(android.R.drawable.checkbox_off_background);
 139                     }
 140                 }
 141                 // notify the change to the container Activity
 142                 mContainerActivity.onFileClick(file);
 143             }
 144
 145         } else {
 146             Log_OC.w(TAG, "Null object in ListAdapter!!");
 147         }
 148     }
 149
 150
 151     /**
 152      * Call this, when the user presses the up button
 153      */
 154     public void onNavigateUp() {
 155         File parentDir = null;
 156         if(mDirectory != null) {
 157             parentDir = mDirectory.getParentFile();  // can be null
 158         }
 159         listDirectory(parentDir);
 160
 161         // restore index and top position
 162         restoreIndexAndTopPosition();
 163     }
 164
 165
 166     /**
 167      * Use this to query the {@link File} object for the directory
 168      * that is currently being displayed by this fragment
 169      *
 170      * @return File     The currently displayed directory
 171      */
 172     public File getCurrentDirectory(){
 173         return mDirectory;
 174     }
 175
 176
 177     /**
 178      * Calls {@link LocalFileListFragment#listDirectory(File)} with a null parameter
 179      * to refresh the current directory.
 180      */
 181     public void listDirectory(){
 182         listDirectory(null);
 183     }
 184
 185
 186     /**
 187      * Lists the given directory on the view. When the input parameter is null,
 188      * it will either refresh the last known directory. list the root
 189      * if there never was a directory.
 190      *
 191      * @param directory     Directory to be listed
 192      */
 193     public void listDirectory(File directory) {
 194
 195         // Check input parameters for null
 196         if(directory == null) {
 197             if(mDirectory != null){
 198                 directory = mDirectory;
 199             } else {
 200                 directory = Environment.getExternalStorageDirectory();  // TODO be careful with the state of the storage; could not be available
 201                 if (directory == null) return; // no files to show
 202             }
 203         }
 204
 205
 206         // if that's not a directory -> List its parent
 207         if(!directory.isDirectory()){
 208             Log_OC.w(TAG, "You see, that is not a directory -> " + directory.toString());
 209             directory = directory.getParentFile();
 210         }
 211
 212         imageView.clearChoices();   // by now, only files in the same directory will be kept as selected
 213         mAdapter.swapDirectory(directory);
 214         if (mDirectory == null || !mDirectory.equals(directory)) {
 215             imageView.setSelection(0);
 216         }
 217         mDirectory = directory;
 218     }
 219
 220
 221     /**
 222      * Returns the fule paths to the files checked by the user
 223      *
 224      * @return      File paths to the files checked by the user.
 225      */
 226     public String[] getCheckedFilePaths() {
 227         ArrayList<String> result = new ArrayList<String>();
 228         SparseBooleanArray positions = imageView.getCheckedItemPositions();
 229         if (positions.size() > 0) {
 230             for (int i = 0; i < positions.size(); i++) {
 231                 if (positions.get(positions.keyAt(i)) == true) {
 232                     result.add(((File) imageView.getItemAtPosition(positions.keyAt(i))).getAbsolutePath());
 233                 }
 234             }
 235
 236             Log_OC.d(TAG, "Returning " + result.size() + " selected files");
 237         }
 238         return result.toArray(new String[result.size()]);
 239     }
 240
 241
 242     /**
 243      * Interface to implement by any Activity that includes some instance of LocalFileListFragment
 244      *
 245      * @author David A. Velasco
 246      */
 247     public interface ContainerActivity {
 248
 249         /**
 250          * Callback method invoked when a directory is clicked by the user on the files list
 251          *
 252          * @param file
 253          */
 254         public void onDirectoryClick(File directory);
 255
 256         /**
 257          * Callback method invoked when a file (non directory) is clicked by the user on the files list
 258          *
 259          * @param file
 260          */
 261         public void onFileClick(File file);
 262
 263
 264         /**
 265          * Callback method invoked when the parent activity is fully created to get the directory to list firstly.
 266          *
 267          * @return  Directory to list firstly. Can be NULL.
 268          */
 269         public File getInitialDirectory();
 270
 271     }
 272
 273
 274 }