如何在android下使用动态切换按钮文本?

我有一个开关按钮,设置如下:

final ToggleButton filterButton = (ToggleButton) findViewById(R.id.filterTags);
        filterButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                if (filterButton.isChecked()) {
                    // pop up the list of tags so the user can choose which to filter by
                    // once one is chosen, the spinner will be updated appropriately
                    showDialog(DIALOG_TAGS);
                } else {
                    // going unpressed, set the the spinner list to everything
                    updateSpinner(db.itemNames());
                }
            }
        });

对话框如下所示:

   case DIALOG_TAGS:
        final String[] tagNames = db.tagNamesInUse();
        dialog = new AlertDialog.Builder(this)
            .setItems(tagNames, new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        updateSpinner(db.getItemNamesForTag(tagNames[which]));
                        final ToggleButton filterButton = (ToggleButton) findViewById(R.id.filterTags);
                        filterButton.setTextOn(tagNames[which]);
                        dialog.dismiss();
                    }
                })
                .setNegativeButton("Cancel", UITools.getDialogCancellingListener())
            .create();

其思想是:如果ToggleButton被打开,它会弹出一个选项列表视图对话框,即标签列表。一旦选择了一个标记,它就成为ToggleButton的新文本。如果ToggleButton已关闭(未选中),则文本将恢复为静态TextOff。

我怎样才能强制重画?我试过了 filterButton.postInvalidate(); 但那没用。