generalization in super class

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

@@ -36,6 +36,7 @@ import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentTransaction;
 import android.widget.Toast;
 
+import com.owncloud.android.MainApp;
 import com.owncloud.android.R;
 import com.owncloud.android.authentication.AccountUtils;
 import com.owncloud.android.authentication.AuthenticatorActivity;
@@ -120,7 +121,8 @@ public abstract class FileActivity extends DrawerActivity
 
     @Override
     public void showFiles(boolean onDeviceOnly) {
-        // must be implemented in Drawer using subclasses
+        // must be specialized in subclasses
+        MainApp.showOnlyFilesOnDevice(onDeviceOnly);
     }
 
     /**

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

@@ -1801,7 +1801,7 @@ public class FileDisplayActivity extends HookActivity
 
     @Override
     public void showFiles(boolean onDeviceOnly) {
-        MainApp.showOnlyFilesOnDevice(onDeviceOnly);
+        super.showFiles(onDeviceOnly);
         getListOfFilesFragment().refreshDirectory();
     }
 }

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

@@ -39,7 +39,6 @@ import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.widget.Toast;
 
-import com.owncloud.android.MainApp;
 import com.owncloud.android.R;
 import com.owncloud.android.authentication.AccountUtils;
 import com.owncloud.android.datamodel.OCFile;
@@ -73,7 +72,7 @@ public class UploadListActivity extends FileActivity implements UploadListFragme
 
     @Override
     public void showFiles(boolean onDeviceOnly) {
-        MainApp.showOnlyFilesOnDevice(onDeviceOnly);
+        super.showFiles(onDeviceOnly);
         Intent i = new Intent(getApplicationContext(), FileDisplayActivity.class);
         i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
         startActivity(i);