add preference to show hidden files

res/values/strings.xml

@@ -28,6 +28,7 @@
     <string name="prefs_accounts">Accounts</string>
     <string name="prefs_manage_accounts">Manage accounts</string>
     <string name="prefs_passcode">Passcode lock</string>
+    <string name="prefs_show_hidden_files">Show hidden files</string>
     <string name="prefs_instant_upload">Instant picture uploads</string>
     <string name="prefs_instant_upload_summary">Instantly upload pictures taken by camera</string>
     <string name="prefs_instant_video_upload">Instant video uploads</string>

res/xml/preferences.xml

@@ -75,6 +75,7 @@
 
 	<PreferenceCategory android:title="@string/prefs_category_details">
 		<android.preference.CheckBoxPreference android:title="@string/prefs_passcode" android:key="set_pincode" />
+		<android.preference.CheckBoxPreference android:title="@string/prefs_show_hidden_files" android:key="show_hidden_files" />
 	</PreferenceCategory>
 
 	<PreferenceCategory android:title="@string/prefs_category_more" android:key="more">

src/com/owncloud/android/db/PreferenceManager.java

@@ -74,6 +74,10 @@ public abstract class PreferenceManager {
         return PreferenceManager.getDefaultSharedPreferences(context).getBoolean("instant_video_upload_on_charging", false);
     }
 
+    public static boolean showHiddenFilesEnabled(Context context) {
+        return PreferenceManager.getDefaultSharedPreferences(context).getBoolean("show_hidden_files_pref", false);
+    }
+
     /**
      * Gets the path where the user selected to do the last upload of a file shared from other app.
      *

src/com/owncloud/android/ui/activity/Preferences.java

@@ -86,6 +86,7 @@ public class Preferences extends PreferenceActivity {
     private Uri mUri;
 
     private CheckBoxPreference pCode;
+    private CheckBoxPreference mShowHiddenFiles;
     private Preference pAboutApp;
     private AppCompatDelegate mDelegate;
 
@@ -164,6 +165,19 @@ public class Preferences extends PreferenceActivity {
             });
         }
 
+        mShowHiddenFiles = (CheckBoxPreference) findPreference("show_hidden_files");
+        mShowHiddenFiles.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                SharedPreferences appPrefs =
+                        PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
+                SharedPreferences.Editor editor = appPrefs.edit();
+                editor.putBoolean("show_hidden_files_pref", mShowHiddenFiles.isChecked());
+                editor.commit();
+                return true;
+            }
+        });
+
         PreferenceCategory preferenceCategory = (PreferenceCategory) findPreference("more");
 
         boolean calendarContactsEnabled = getResources().getBoolean(R.bool.calendar_contacts_enabled);

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

@@ -66,6 +66,7 @@ public class FileListListAdapter extends BaseAdapter implements FilterableListAd
     private Vector<OCFile> mFilesAll = new Vector<OCFile>();
     private Vector<OCFile> mFiles = null;
     private boolean mJustFolders;
+    private boolean mShowHiddenFiles;
 
     private FileDataStorageManager mStorageManager;
     private Account mAccount;
@@ -86,7 +87,10 @@ public class FileListListAdapter extends BaseAdapter implements FilterableListAd
         // Read sorting order, default to sort by name ascending
         FileStorageUtils.mSortOrder = PreferenceManager.getSortOrder(mContext);
         FileStorageUtils.mSortAscending = PreferenceManager.getSortAscending(mContext);
-        
+
+        // Fetch preferences for showing hidden files
+        mShowHiddenFiles = PreferenceManager.showHiddenFilesEnabled(mContext);
+
         // initialise thumbnails cache on background thread
         new ThumbnailsCacheManager.InitDiskCacheTask().execute();
     }
@@ -390,6 +394,10 @@ public class FileListListAdapter extends BaseAdapter implements FilterableListAd
             if (mJustFolders) {
                 mFiles = getFolders(mFiles);
             }
+
+            if (!mShowHiddenFiles) {
+                mFiles = filterHiddenFiles(mFiles);
+            }
         } else {
             mFiles = null;
         }
@@ -466,4 +474,23 @@ public class FileListListAdapter extends BaseAdapter implements FilterableListAd
         }
         notifyDataSetChanged();
     }
+
+    /**
+     * Filter for hidden files
+     *
+     * @param files             Collection of files to filter
+     * @return                  Non-hidden files
+     */
+    public Vector<OCFile> filterHiddenFiles(Vector<OCFile> files) {
+        Vector<OCFile> ret = new Vector<>();
+        OCFile current;
+        for (int i = 0; i < files.size(); i++) {
+            current = files.get(i);
+            if (!current.isHidden()) {
+                ret.add(current);
+            }
+        }
+        return ret;
+    }
+
 }

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

@@ -45,6 +45,7 @@ import java.io.File;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Comparator;
+import java.util.List;
 import java.util.Vector;
 
 /**
@@ -290,6 +291,12 @@ public class LocalFileListAdapter extends BaseAdapter implements FilterableListA
 
             mFiles = FileStorageUtils.sortLocalFolder(mFiles);
 
+            // Fetch preferences for showing hidden files
+            boolean showHiddenFiles = PreferenceManager.showHiddenFilesEnabled(mContext);
+            if (!showHiddenFiles) {
+                mFiles = filterHiddenFiles(mFiles);
+            }
+
             mFilesAll.clear();
 
             for (File mFile : mFiles) {
@@ -325,4 +332,20 @@ public class LocalFileListAdapter extends BaseAdapter implements FilterableListA
         }
         notifyDataSetChanged();
     }
+
+    /**
+     * Filter for hidden files
+     *
+     * @param files             Array of files to filter
+     * @return                  Non-hidden files as an array
+     */
+    public File[] filterHiddenFiles(File[] files) {
+        List<File> ret = new ArrayList<>();
+        for (File file: files) {
+            if (!file.isHidden()) {
+                ret.add(file);
+            }
+        }
+        return ret.toArray(new File[0]);
+    }
 }