src/com/owncloud/android/ui/fragment/LocalFileListFragment.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.fragment;
  19
  20 import java.io.File;
  21
  22 import com.owncloud.android.ui.FragmentListView;
  23 import com.owncloud.android.ui.adapter.LocalFileListAdapter;
  24
  25 import android.app.Activity;
  26 import android.os.Bundle;
  27 import android.os.Environment;
  28 import android.util.Log;
  29 import android.util.SparseBooleanArray;
  30 import android.view.LayoutInflater;
  31 import android.view.View;
  32 import android.view.ViewGroup;
  33 import android.widget.AdapterView;
  34 import android.widget.ImageView;
  35 import android.widget.ListView;
  36
  37 import com.owncloud.android.R;
  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 FragmentListView {
  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.getCanonicalName());
  68         }
  69     }
  70
  71
  72     /**
  73      * {@inheritDoc}
  74      */
  75     @Override
  76     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
  77         Log.i(getClass().toString(), "onCreateView() start");
  78         super.onCreateView(inflater, container, savedInstanceState);
  79         getListView().setDivider(getResources().getDrawable(R.drawable.uploader_list_separator));
  80         getListView().setDividerHeight(1);
  81         getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
  82
  83         if (savedInstanceState != null) {
  84             // TODO recover previous state; or maybe in onActivityCreated
  85         }
  86
  87         Log.i(getClass().toString(), "onCreateView() end");
  88         return getListView();
  89     }
  90
  91
  92     /**
  93      * {@inheritDoc}
  94      */
  95     @Override
  96     public void onActivityCreated(Bundle savedInstanceState) {
  97         Log.i(getClass().toString(), "onActivityCreated() start");
  98
  99         super.onCreate(savedInstanceState);
 100
 101         Log.i(getClass().toString(), "onActivityCreated() stop");
 102     }
 103
 104
 105     /**
 106      * Checks the file clicked over. Browses inside if it is a directory. Notifies the container activity in any case.
 107      */
 108     @Override
 109     public void onItemClick(AdapterView<?> l, View v, int position, long id) {
 110         File file = (File) mAdapter.getItem(position);
 111         if (file != null) {
 112             /// Click on a directory
 113             if (file.isDirectory()) {
 114                 // just local updates
 115                 listDirectory(file);
 116                 // notify the click to container Activity
 117                 mContainerActivity.onDirectoryClick(file);
 118
 119             } else {    /// Click on a file
 120                 ImageView checkBoxV = (ImageView) v.findViewById(R.id.custom_checkbox);
 121                 if (checkBoxV != null) {
 122                     if (getListView().isItemChecked(position)) {
 123                         checkBoxV.setImageResource(android.R.drawable.checkbox_on_background);
 124                     } else {
 125                         checkBoxV.setImageResource(android.R.drawable.checkbox_off_background);
 126                     }
 127                 }
 128                 // notify the change to the container Activity
 129                 mContainerActivity.onFileClick(file);
 130             }
 131
 132         } else {
 133             Log.w(TAG, "Null object in ListAdapter!!");
 134         }
 135     }
 136
 137
 138     /**
 139      * Call this, when the user presses the up button
 140      */
 141     public void onNavigateUp() {
 142         File parentDir = null;
 143         if(mDirectory != null) {
 144             parentDir = mDirectory.getParentFile();  // can be null
 145         }
 146         listDirectory(parentDir);
 147     }
 148
 149
 150     /**
 151      * Use this to query the {@link File} object for the directory
 152      * that is currently being displayed by this fragment
 153      *
 154      * @return File     The currently displayed directory
 155      */
 156     public File getCurrentDirectory(){
 157         return mDirectory;
 158     }
 159
 160
 161     /**
 162      * Calls {@link LocalFileListFragment#listDirectory(File)} with a null parameter
 163      * to refresh the current directory.
 164      */
 165     public void listDirectory(){
 166         listDirectory(null);
 167     }
 168
 169
 170     /**
 171      * Lists the given directory on the view. When the input parameter is null,
 172      * it will either refresh the last known directory, or list the root
 173      * if there never was a directory.
 174      *
 175      * @param directory     Directory to be listed
 176      */
 177     public void listDirectory(File directory) {
 178
 179         // Check input parameters for null
 180         if(directory == null) {
 181             if(mDirectory != null){
 182                 directory = mDirectory;
 183             } else {
 184                 directory = Environment.getExternalStorageDirectory();  // TODO be careful with the state of the storage; could not be available
 185                 if (directory == null) return; // no files, wait for sync
 186             }
 187         }
 188
 189
 190         // if that's not a directory -> List its parent
 191         if(!directory.isDirectory()){
 192             Log.w(TAG, "You see, that is not a directory -> " + directory.toString());
 193             directory = directory.getParentFile();
 194         }
 195
 196         mDirectory = directory;
 197         if (mAdapter == null) {
 198             mAdapter = new LocalFileListAdapter(mDirectory, getActivity());
 199             setListAdapter(mAdapter);
 200         } else {
 201             mList.clearChoices();   // by now, only files in the same directory will be kept as selected
 202             mAdapter.swapDirectory(mDirectory);
 203         }
 204
 205     }
 206
 207
 208     /**
 209      * Returns the fule paths to the files checked by the user
 210      *
 211      * @return      File paths to the files checked by the user.
 212      */
 213     public String[] getCheckedFilePaths() {
 214         String [] result = null;
 215         SparseBooleanArray positions = mList.getCheckedItemPositions();
 216         if (positions.size() > 0) {
 217             Log.d(TAG, "Returning " + positions.size() + " selected files");
 218             result = new String[positions.size()];
 219             for (int i=0; i<positions.size(); i++) {
 220                 result[i] = ((File) mList.getItemAtPosition(positions.keyAt(i))).getAbsolutePath();
 221             }
 222         }
 223         return result;
 224     }
 225
 226
 227     /**
 228      * Interface to implement by any Activity that includes some instance of LocalFileListFragment
 229      *
 230      * @author David A. Velasco
 231      */
 232     public interface ContainerActivity {
 233
 234         /**
 235          * Callback method invoked when a directory is clicked by the user on the files list
 236          *
 237          * @param file
 238          */
 239         public void onDirectoryClick(File directory);
 240
 241         /**
 242          * Callback method invoked when a file (non directory) is clicked by the user on the files list
 243          *
 244          * @param file
 245          */
 246         public void onFileClick(File file);
 247
 248     }
 249
 250
 251 }