+
+ // Setup a `MatrixCursor` for "All Folders" and "Home Folder".
+ String[] matrixCursorColumnNames = {BookmarksDatabaseHelper._ID, BookmarksDatabaseHelper.BOOKMARK_NAME};
+ MatrixCursor matrixCursor = new MatrixCursor(matrixCursorColumnNames);
+ matrixCursor.addRow(new Object[]{-2, getString(R.string.all_folders)});
+ matrixCursor.addRow(new Object[]{-1, getString(R.string.home_folder)});
+
+ // Get a `Cursor` with the list of all the folders.
+ Cursor foldersCursor = bookmarksDatabaseHelper.getAllFoldersCursor();
+
+ // Combine `matrixCursor` and `foldersCursor`.
+ MergeCursor foldersMergeCursor = new MergeCursor(new Cursor[]{matrixCursor, foldersCursor});
+
+ // Create a `ResourceCursorAdapter` for the spinner with `this` context. `0` specifies no flags.;
+ ResourceCursorAdapter foldersCursorAdapter = new ResourceCursorAdapter(this, R.layout.bookmarks_databaseview_spinner_item, foldersMergeCursor, 0) {
+ @Override
+ public void bindView(View view, Context context, Cursor cursor) {
+ // Get a handle for the spinner item `TextView`.
+ TextView spinnerItemTextView = (TextView) view.findViewById(R.id.spinner_item_textview);
+
+ // Set the `TextView` to display the folder name.
+ spinnerItemTextView.setText(cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME)));
+ }
+ };
+
+ // Set the `ResourceCursorAdapter` drop drown view resource.
+ foldersCursorAdapter.setDropDownViewResource(R.layout.bookmarks_databaseview_spinner_dropdown_item);
+
+ // Get a handle for the folder `Spinner`.
+ Spinner folderSpinner = (Spinner) findViewById(R.id.bookmarks_database_view_spinner);
+
+ // Set the adapter for the folder `Spinner`.
+ folderSpinner.setAdapter(foldersCursorAdapter);
+
+ // Handle clicks on the `Spinner` dropdown.
+ folderSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
+ @Override
+ public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+ // Convert the database ID to an `int`.
+ int databaseId = (int) id;
+
+ // Instantiate the bookmarks `Cursor`.
+ Cursor bookmarksCursor;
+
+ // Populate the bookmarks `ListView` based on the `Spinner` selection.
+ switch (databaseId) {
+ // Display all the folders.
+ case -2:
+ // Get a cursor with all the folders.
+ bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursor();
+ break;
+
+ // Display the home folder.
+ case -1:
+ // Get a cursor for the home folder.
+ bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursor("");
+ break;
+
+ // Display the selected folder.
+ default:
+ // Get a handle for the selected view.
+ TextView selectedFolderTextView = (TextView) view.findViewById(R.id.spinner_item_textview);
+
+ // Extract the name of the selected folder.
+ String folderName = selectedFolderTextView.getText().toString();
+
+ // Get a cursor for the selected folder.
+ bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursor(folderName);
+ }
+
+ // Update the `ListView`.
+ bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+ }
+
+ @Override
+ public void onNothingSelected(AdapterView<?> parent) {
+ // Do nothing.
+ }
+ });
+
+ // Get a handle for the bookmarks `ListView`.