如何在android中编辑listView的项目

Question

我有一个listView并显示数据库中的数据。我想点击每个项目进行简单的编辑，但我的编辑功能不起作用！ 这是我的编辑功能:(数据库是SQLiteDatabase类的对象）

public Book editBook(Book book, String name, String writer, String year)   {
    long id = book.getId();
    String selection = id + " = ?";
    String[] selectionArgs = { String.valueOf(id) };

    ContentValues values = new ContentValues();
    values.put(sqlHelper.COLUMN_NAME, name);
    values.put(sqlHelper.COLUMN_WRITER, writer);
    values.put(sqlHelper.COLUMN_YEAR, year);
    int returnId = database.update(sqlHelper.TABLE,  values,selection,selectionArgs);

    return book;
   }

在MainActivity中调用的编辑函数如下：

    ListView list = getListView();
    list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Book data = (Book) parent.getItemAtPosition(position);
            datasource.editBook(data,data.getName() + " 2014", data.getWriter() + "," + data.getWriter(), data.getYear());
            adapter.notifyDataSetChanged();
        }
    });  
ListView list = getListView();
    list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Book data = (Book) parent.getItemAtPosition(position);
            datasource.editBook(data,data.getName() + " 2014", data.getWriter() + "," + data.getWriter(), data.getYear());
            adapter.notifyDataSetChanged();
        }
    });