从SQLite和listView

Question

我想用contextMenu从listView和SQLite数据库中删除项目，我的代码不会删除任何内容。也许有人可以帮助我？

DBAdapter.java

public void delete(String name)throws SQLException {
        SQLiteDatabase db = helper.getWritableDatabase();
        if (db == null) {
            return;
        }
        String[] whereArgs = new String[] { name };
        db.delete("m_TB", "NAME"+ "=?", whereArgs);
        db.close();
    }

MainActivity.java

public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);
        menu.add("Delete");
    }

    public boolean onContextItemSelected(MenuItem item) {
        super.onContextItemSelected(item);
        AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
        String name = info.toString();
        if (item.getTitle().equals("Delete")) {
            db.delete(name);
            books.remove(item);
            adapter.notifyDataSetChanged();

        }
        return true;
    }